Definition of PVC stabilizer in a narrow sense, refers primarily to maintain high polymer plastics, rubber, synthetic fibers, such as stability and prevent its decomposition, the aging of reagents.
PVC stabilizer lead salt is the most commonly used heat stabilizer, is also very effective heat stabilizer, the amount can be accounted for more than 70% PVC heat stabilizers.
Advantages stabilizer: excellent thermal stability, with long-term thermal stability, good electrical insulation properties, weatherability, low prices. Stabilizer disadvantages: poor dispersibility, toxicity, with the PVC heat stabilizer color, it is difficult to obtain a transparent product, it is difficult to obtain a vivid color products, the lack of lubricity, easy to produce sulfur contamination.
PVC stabilizer to increase the solution, gel, solid, chemical stability of the mixture are called stabilizers. It can slow down the reaction, to maintain chemical balance, reduce surface tension, to prevent the light, PVC stabilizer for profile
decomposition or oxidation decomposition effect. Source generalized chemical PVC stabilizer is very extensive, mainly based formulation designed to designers, the flexibility to use any chemicals to achieve a stable product quality purposes. Narrowly speaking, mainly refers to maintain high polymer plastics, rubber, synthetic fibers, such as stability and prevent its decomposition, the aging of reagents. In food additives, stabilizers is to make food structural stability, enhanced viscous solids of a class of food additives. Auxiliary heat stabilizer itself does not have heat stability, and only used in combination with the primary stabilizer, heat stabilizing effect will be generated, and to promote the primary stabilizing effect of the stabilizer. Secondary thermal stabilizers generally do not contain metal, which is also called a non-metallic heat stabilizers.
impact modifier
2014年10月8日星期三
2014年9月24日星期三
PVC stabilizer uses and Introduction
PVC stabilizer to increase the solution, gel, solid, chemical stability of the mixture are called stabilizers. It can slow down the reaction, to maintain chemical balance, reduce surface tension, to prevent the light, thermal decomposition or oxidation decomposition effect. Sources generalized chemical stabilizer is very extensive, mainly based formulation designed to designers, the flexibility to use any chemicals to achieve a stable product quality purposes. Narrowly speaking, mainly refers to maintain high polymer plastics, rubber, synthetic fibers, such as PVC stabilizer and prevent its decomposition, the aging of reagents. With a stabilizer according to several different mechanisms to achieve thermal stability purposes. In food additives, PVC stabilizer is to make food structural stability, enhanced viscous solids of a class of food additives. Lead salt PVC stabilizer low price, good thermal PVC stabilizer , has been widely used. Composite thermal stabilizer of the various components can be adequately mixed in the course of production, with a significant improvement in mixing the resin dispersion uniformity. Composite heat PVC stabilizer of the various components can be adequately mixed in the course of production, with a significant improvement in mixing the resin dispersion uniformity. Liquid stabilizer more popular in the country are: PVC heat stabilizer barium zinc stabilizer, liquid calcium zinc stabilizers, liquid barium cadmium zinc stabilizers, liquid barium cadmium stabilizers, liquid potassium zinc catalyst foam stabilizer. New Century people more emphasis on environmental health, as the heavy metals cadmium, had been criticized, so the application scale is gradually reduced, and now the market is commonly used in liquid zinc and barium liquid calcium zinc. Little difference between the stability of the liquid, the liquid stabilizer generally has a greater solubility, and a good dispersibility in PVC resin powder, an effect on the transparency of the powder is also much less than the stabilizer. However, the risk of precipitation of the liquid stabilizer greater. Need to select a suitable solvent.
2014年9月19日星期五
Introduction and properties of PVC stabilizer
Sources generalized chemical stabilizer is very extensive, mainly based formulation designed to designers, the flexibility to use any chemicals to achieve a stable product quality purposes. Narrowly speaking, mainly refers to maintain high polymer plastics, rubber, synthetic fibers, such as PVC stabilizer
and prevent its decomposition, the aging of reagents. PVC stabilizer for pipe can increase the solution, gel, solid, stable mixture of chemicals called stabilizers. PVC stabilizer for pipe can slow down the reaction, to maintain chemical balance, reduce surface tension, to prevent the light, thermal decomposition or oxidation decomposition effect.Composite Heat Stabilizer conducive scale production, for the development of lead salt heat stabilizer provides a new direction. Auxiliary heat stabilizer itself does not have heat stability, and only used in combination with the primary PVC stabilizer
, heat stabilizing effect will be generated, and to promote the primary stabilizing effect of the stabilizer. Auxiliary heat PVC stabilizer for pipe generally does not contain metal, also known as non-metal heat stabilizers. Lead salt stabilizer low price, good thermal stability, has been widely used, the composite heat stabilizer of the various components can be adequately mixed in the course of production, with a significant improvement in mixing the resin dispersion uniformity. Simple supply and reserve the materials is conducive to production and quality management.
and prevent its decomposition, the aging of reagents. PVC stabilizer for pipe can increase the solution, gel, solid, stable mixture of chemicals called stabilizers. PVC stabilizer for pipe can slow down the reaction, to maintain chemical balance, reduce surface tension, to prevent the light, thermal decomposition or oxidation decomposition effect.Composite Heat Stabilizer conducive scale production, for the development of lead salt heat stabilizer provides a new direction. Auxiliary heat stabilizer itself does not have heat stability, and only used in combination with the primary PVC stabilizer
, heat stabilizing effect will be generated, and to promote the primary stabilizing effect of the stabilizer. Auxiliary heat PVC stabilizer for pipe generally does not contain metal, also known as non-metal heat stabilizers. Lead salt stabilizer low price, good thermal stability, has been widely used, the composite heat stabilizer of the various components can be adequately mixed in the course of production, with a significant improvement in mixing the resin dispersion uniformity. Simple supply and reserve the materials is conducive to production and quality management.
2014年9月12日星期五
PVC stabilizer Introduction
PVC stabilizer to increase the solution, gel, solid, chemical stability of the mixture are called stabilizers. It can slow down the reaction, to maintain chemical balance, reduce surface tension, to prevent the light, thermal decomposition or oxidation decomposition effect. Sources generalized chemical stabilizer is very extensive, mainly based formulation designed to designers, the flexibility to use any chemicals to achieve a stable product quality purposes. Narrowly speaking, mainly refers to maintain high polymer plastics, rubber, synthetic fibers, such as stability and prevent its decomposition, the aging of reagents. PVC heat stabilizer itself does not have heat stability, and only together with the main stabilizer and use, will produce heat stabilizing effect, and the effect of promoting stability in the primary PVC stabilizer. Secondary thermal stabilizers generally do not contain metal, which is also called a non-metallic heat PVC stabilizer .
Liquid PVC stabilizer in the country more popular are: liquid barium zinc stabilizer, liquid calcium zinc stabilizers, liquid barium cadmium zinc stabilizers, liquid barium cadmium stabilizers, liquid potassium zinc catalyst foam stabilizer. New Century people more emphasis on environmental health, as the heavy metals cadmium, had been criticized, so the application scale is gradually reduced, and now the market is commonly used in liquid zinc and barium liquid calcium zinc. Little difference between the stability of the liquid, the liquid stabilizer generally has a greater solubility, and a good dispersibility in PVC resin powder, an effect on the transparency of the powder is also much less than the stabilizer. However, the risk of precipitation of the liquid stabilizer greater. Need to select a suitable solvent.
2014年9月5日星期五
WSD PVC stabilizer Introduction
Solution can increase, colloidal solids, chemical stability of the mixture are called stabilizers. It can slow down the reaction, to maintain chemical balance, reduce surface tension, to prevent the light, thermal decomposition or oxidation decomposition effect. Sources PVC heat stabilizer chemical stabilizer is very extensive, mainly based formulation designed to designers, the flexibility to use any chemicals to achieve a stable product quality purposes. Narrowly speaking, mainly refers to maintain high polymer plastics, rubber, synthetic fibers, such as stability and prevent its decomposition, the aging of reagents.
Auxiliary heat stabilizer itself does not have heat stability, and only used in combination with the primary stabilizer, heat stabilizing PVC stabilizer for profile will be generated, and to promote the primary stabilizing effect of the stabilizer. Secondary thermal stabilizers generally do not contain metal, which is also called a non-metallic heat stabilizers.
Liquid stabilizer more popular in the country are: liquid barium zinc stabilizer, liquid calcium zinc stabilizers, liquid barium cadmium zinc stabilizers, liquid barium cadmium stabilizers, liquid potassium zinc catalyst foam stabilizer.
2014年8月26日星期二
WSD PVC stabilizer one pack stabilizer PVC Heat stabilizer Introduction and Safety
WSD PVC stabilizer is one important class of plastics processing aids, the birth and development of a thermal stabilizer synchronization with PVC resin is mainly used for the processing of PVC resin, heat stabilizer and so the PVC resin, the ratio of hard and soft PVC products are a close relationship.
Since the thermal energy, such as PVC stabilizer for profile fillers, and other compatible polymers and many other materials, which is considered one of the most common polymers. Its main drawback is the differential thermal stability.
The use of additives to change the polyvinyl chloride (PVC) and the operating characteristics of the physical appearance, but can not prevent the decomposition of the polymer. Although in the physical and chemical factors of the polymer material will always gradually destroyed, but the PVC stabilizer is called a class of substances can be effectively prevented, substantially reduced or even stop the degradation of the material. Security issues heat stabilizers have more and more people's attention. . Safety PVC stabilizers should consider three aspects, namely the safety of the use of raw materials processing, the second is the user's security, the third is the safety of waste on the environment. Processors security PVC heat stabilizer calcium stearate measures can be liquefied by stabilizers, cream-based, granular, etc. to be addressed. For the user's safety, the molecular weight of the stabilizer may be prepared in a reactive stabilizer or to improve its resistance to pulling, but taking into account the effect of stabilizing the chemical reaction at the molecular level, the above method is not the most appropriate method, the most good way to still use high security stabilizers. In the choice of the stabilizer, the stabilization process must also be considered in the resin with a stabilizer, or stabilizing agents react with each other the resulting chemical safety.
The use of additives to change the polyvinyl chloride (PVC) and the operating characteristics of the physical appearance, but can not prevent the decomposition of the polymer. Although in the physical and chemical factors of the polymer material will always gradually destroyed, but the PVC stabilizer is called a class of substances can be effectively prevented, substantially reduced or even stop the degradation of the material. Security issues heat stabilizers have more and more people's attention. . Safety PVC stabilizers should consider three aspects, namely the safety of the use of raw materials processing, the second is the user's security, the third is the safety of waste on the environment. Processors security PVC heat stabilizer calcium stearate measures can be liquefied by stabilizers, cream-based, granular, etc. to be addressed. For the user's safety, the molecular weight of the stabilizer may be prepared in a reactive stabilizer or to improve its resistance to pulling, but taking into account the effect of stabilizing the chemical reaction at the molecular level, the above method is not the most appropriate method, the most good way to still use high security stabilizers. In the choice of the stabilizer, the stabilization process must also be considered in the resin with a stabilizer, or stabilizing agents react with each other the resulting chemical safety.
2014年8月1日星期五
The actual effect of PVC heat stabilizer
PVC heat stabilizer has two main preparation process, one is the calcium carbide process, main raw materials for the production of PVC heat stabilizer is calcium carbide, coal and salt; two is the ethylene method, optical brightener main raw material is oil. PVC heat stabilizer and zinc borate and optical brighteners are mainlycalcium carbide method. In the calcium carbide preparation of PVC, PVC thermal stabilizer in the salt electrolysis hydrogen chloride for the production of PVC, sodiumsurplus for the production of caustic soda, so, black iron oxide, zinc borate, antimonyflame retardant actually exists symbiosis, chlor alkali balance optical brighteners andthe entire industry two processes in different economic development cycle opticalbrightener, cost difference. Under normal circumstances, iron oxide black because ofhigher oil prices, high aluminum hydroxide and optical brightening agent ethyleneproduction cost, chromium oxide and zinc borate advantages; but once the international economy into recession, chromium oxide will be running low, calcium carbide process because of high energy consumption, such as the electricity price support, cost advantage disappears. PVC heat stabilizer and optical brighteners tocarbide PVC capacity is expanding rapidly, formed a great challenge to the ethyleneproduction of PVC, optical brighteners are many ethylene enterprises at a loss of the edge. But with the 2008 May crude oil prices continued to decline, the ethylene cost advantage obviously, electrical manufacturers stone low profit operation, or evendifficult to continue.
2014年7月16日星期三
The practical application of fire retardant PVC
Short flame retardant PVC: PVC is a chlorine atom using a polyethylene polymer of one hydrogen atom. PVC is a white amorphous powder, a small degree of branching. Industrial production is dedicated PVC flame retardant masterbatch for coloring! Raw crushed, add masterbatch granules dissolve heating, mechanical molding! Full name masterbatch color masterbatch also called species, mainly used in plastic masterbatch the. WSD PVC stabilizer achieve what color toone pack stabilizer achieve the effect of plastic or rubber products in the Third and masterbatch is a representative. Zhejiang Shengzhou Master Chemical Co., the company invested in the construction process and technology development retardant PVC plastic flooring, PVC flame retardants quality control ultra-resistaone pack stabilizert and flame retardant laminate PVC plastic flooring construction process is as follows: Construction clean up the preparatory work before the original terrazzo surface dust and grit dedicated interface agent deal screeds cleaning,trimming brush self-leveling grout grout surface polished character piece, slightly blue-ray filmone pack stabilizer a variety of colored pieces; may sample or standard color card provided by the customer to produce, acone pack stabilizer cording to transparency: transparent film, translucent film,WSD PVC stabilizer opaque film, press Finish: film, frosted film PVC flame retardant thermoplastic polyvinyl chloride resin. Zhejiang Shengzhou Master Chemical Limited, a company in the steel, wood, cement-based building materials selected, flame retardants and PVC is a general-purpose resins, chloWSD PVC stabilizer-alkali industry is the largest organic chlorine consumption products.
2014年7月2日星期三
WSD PVC Heat Stabilizer
WSD PVC Heat Stabilizer is mainly used for PVC heat stabilizers and other chlorinated polymers. PVC has been found only in the plastic molding process to above 160 ℃, while it is in the 120 ~ 130 ℃ thermal decomposition begins, releasing HCl gas, zinc borate HCl is generated if it does not inhibit the decomposition will further exacerbate this problem has been plagued the main problem of development and application of PVC plastics.
The study found that if the amount of PVC-containing plastics, such as lead salts, metal soaps, phenols, aromatic amines and other impurities, which will not affect the processing and application, but also to some extent, delaying the thermal decomposition aluminum hydroxide effect.WSD PVC Heat Stabilizer The above problem can be solved, thus contributing to the establishment of research in the field of heat stabilizers and continue to develop.
2014年5月6日星期二
PP plastic WSD PVC stabilizer of physical characteristics
PP polypropylene resin is a colorless, odorless , non-toxic powder or granular combustible matter , density of 0.90 ~ 0.91g/cm3, a low density resin . It is more transparent than polyethylene , lighter , breathable lower.
Regular molecular structure of the polypropylene is a crystalline polymer having a spherulite structure in general . Crystallinity polymer isotacticity with relevant regulations , etc. The higher the degree of crystallinity larger . The crystallinity of the polypropylene is generally from 30 to 70% . Density directly affects the degree of crystallinity , density polypropylene crystalline portion of 0.94g/cm3, the density of Titanium dioxide rutile the non- crystalline portion of 0.85g/cm3, and therefore the higher the crystallinity, the greater its density . Surface hardness than the high -density polyethylene polypropylene big . Its tensile strength than polyethylene , polystyrene, and styrene - butadiene - acrylonitrile copolymer (ABS) large, especially when the temperature exceeds 80 ℃ still maintain high strength , PVC stabilizer even at 100 ℃ stretching , half strength retained at room temperature . Polypropylene at high temperatures have a high impact strength , low temperature impact strength but worse than polyethylene. Polypropylene has excellent flex fatigue resistance , which is one of the unique properties of polypropylene . Polypropylene is the best inexpensive resin a heat-resistant , can be used in harsh conditions of 100 ℃ . The melting point of the polypropylene 164 ~ 170 ℃ ( pure isotactic polypropylene mp 176 ℃). As polypropylene and polyethylene , has excellent electrical insulating properties , and because it does not absorb water ( water absorption < 0.02% ) , and therefore not affected by humidity , the Plastic impact modifier dielectric constant and dielectric loss is small , with excellent high frequency characteristics. Polypropylene has good chemical stability , its chemical stability increased with increasing degree of crystallinity , except for a few medium is stable for most media Han , PVC stabilizer is usually an inorganic acid , base or salt solution , in addition to a strong by oxidation , the temperature is 100 ℃ at almost no damage to the polypropylene . The presence of a tertiary carbon atom in the polypropylene molecule , and therefore susceptible to oxidative corrosion medium . Polypropylene is very stable polar organic solvents , alcohols , phenols , aldehydes , ketones, carboxylic acids , etc. do not make the most of the swelling Aluminum hydroxide of polypropylene , aromatic and chlorinated hydrocarbons , but when the polypropylene has above 80 ℃ dissolution.
Regular molecular structure of the polypropylene is a crystalline polymer having a spherulite structure in general . Crystallinity polymer isotacticity with relevant regulations , etc. The higher the degree of crystallinity larger . The crystallinity of the polypropylene is generally from 30 to 70% . Density directly affects the degree of crystallinity , density polypropylene crystalline portion of 0.94g/cm3, the density of Titanium dioxide rutile the non- crystalline portion of 0.85g/cm3, and therefore the higher the crystallinity, the greater its density . Surface hardness than the high -density polyethylene polypropylene big . Its tensile strength than polyethylene , polystyrene, and styrene - butadiene - acrylonitrile copolymer (ABS) large, especially when the temperature exceeds 80 ℃ still maintain high strength , PVC stabilizer even at 100 ℃ stretching , half strength retained at room temperature . Polypropylene at high temperatures have a high impact strength , low temperature impact strength but worse than polyethylene. Polypropylene has excellent flex fatigue resistance , which is one of the unique properties of polypropylene . Polypropylene is the best inexpensive resin a heat-resistant , can be used in harsh conditions of 100 ℃ . The melting point of the polypropylene 164 ~ 170 ℃ ( pure isotactic polypropylene mp 176 ℃). As polypropylene and polyethylene , has excellent electrical insulating properties , and because it does not absorb water ( water absorption < 0.02% ) , and therefore not affected by humidity , the Plastic impact modifier dielectric constant and dielectric loss is small , with excellent high frequency characteristics. Polypropylene has good chemical stability , its chemical stability increased with increasing degree of crystallinity , except for a few medium is stable for most media Han , PVC stabilizer is usually an inorganic acid , base or salt solution , in addition to a strong by oxidation , the temperature is 100 ℃ at almost no damage to the polypropylene . The presence of a tertiary carbon atom in the polypropylene molecule , and therefore susceptible to oxidative corrosion medium . Polypropylene is very stable polar organic solvents , alcohols , phenols , aldehydes , ketones, carboxylic acids , etc. do not make the most of the swelling Aluminum hydroxide of polypropylene , aromatic and chlorinated hydrocarbons , but when the polypropylene has above 80 ℃ dissolution.
2014年4月15日星期二
PVC stabilizer should be noted that some of the problems
Production of paint color retention stabilizer made six major advantages:
A coating applied to the construction process scratch easily without effort, good polishing.
After two dry smooth and delicate, jade hand touch, side as a mirror.
3 hardness is hand draw trace.
4 water resistance, washing powder can not afford a hundred times without cracking. Not from powder using a decade, two decades can not block.
5 No yellowing, PVC stabilizer bright color, good whiteness.
6 powder coating can be resolved using the WSD Stabilizers for pipe blur, yellow major problem. (Dry, add water while stirring, to join together the raw
materials and water, one hundred kilograms plus 300 grams of finished paint color retention stabilizer, stir, to construction.)
Instructions for use:
Before a first add ingredients of water, ash and calcium PVA glue, three raw materials are mixed and stirred for 5 - 10 minutes,
stop the rotation of the stirrer was slowly added color retention stabilizer be added after all the added powder and other Flying
raw materials.
After adding 2 per ton of raw materials on the basis of your original finished paint plus 100 - 200 kg Flying powder, the use of
this raw material in production to try to make a thick, dust ourselves, plus thick prevail. Paint will be more easy to use, easy
sliding profits do not turn the knife, a good collection of light.
3 additional insurance required per ton of WSD Metallic stearate finished paint color stabilizer summer 1 - 2 kilograms, can Paul 3 - 6 months does not
fade, the temperature at 25 degrees Celsius or less insurable year does not fade, its biggest advantage is the last light in color , became white paint, but also to extend the storage period of one year.
Note: A raw material can not and citric acid, PVC stabilizer in combination with borax, make sure to shake well before using this
product, do a small experiment and then put into production, production in proportion to the number of data to be accurate.
Two materials are chemical products, corrosive to the WSD PVC stabilizer skin, do not directly touch.
3 according to the number of recipes using the plant ash calcium, calcium and more with gray color retention stabilizer on, the
longer the more you add color retention time, but do not use too much harm. Our conservative figures, plus a tonne of finished
paint color retention Stabilizer 1 - 2 kilograms best, more color, more weight, color retention time will be longer.
4 material to cool and ventilated, kept at room temperature; away from heat, sun exposure is strictly prohibited.
A coating applied to the construction process scratch easily without effort, good polishing.
After two dry smooth and delicate, jade hand touch, side as a mirror.
3 hardness is hand draw trace.
4 water resistance, washing powder can not afford a hundred times without cracking. Not from powder using a decade, two decades can not block.
5 No yellowing, PVC stabilizer bright color, good whiteness.
6 powder coating can be resolved using the WSD Stabilizers for pipe blur, yellow major problem. (Dry, add water while stirring, to join together the raw
materials and water, one hundred kilograms plus 300 grams of finished paint color retention stabilizer, stir, to construction.)
Instructions for use:
Before a first add ingredients of water, ash and calcium PVA glue, three raw materials are mixed and stirred for 5 - 10 minutes,
stop the rotation of the stirrer was slowly added color retention stabilizer be added after all the added powder and other Flying
raw materials.
After adding 2 per ton of raw materials on the basis of your original finished paint plus 100 - 200 kg Flying powder, the use of
this raw material in production to try to make a thick, dust ourselves, plus thick prevail. Paint will be more easy to use, easy
sliding profits do not turn the knife, a good collection of light.
3 additional insurance required per ton of WSD Metallic stearate finished paint color stabilizer summer 1 - 2 kilograms, can Paul 3 - 6 months does not
fade, the temperature at 25 degrees Celsius or less insurable year does not fade, its biggest advantage is the last light in color , became white paint, but also to extend the storage period of one year.
Note: A raw material can not and citric acid, PVC stabilizer in combination with borax, make sure to shake well before using this
product, do a small experiment and then put into production, production in proportion to the number of data to be accurate.
Two materials are chemical products, corrosive to the WSD PVC stabilizer skin, do not directly touch.
3 according to the number of recipes using the plant ash calcium, calcium and more with gray color retention stabilizer on, the
longer the more you add color retention time, but do not use too much harm. Our conservative figures, plus a tonne of finished
paint color retention Stabilizer 1 - 2 kilograms best, more color, more weight, color retention time will be longer.
4 material to cool and ventilated, kept at room temperature; away from heat, sun exposure is strictly prohibited.
2014年4月9日星期三
What are the advantages of PVC stabilizer
Advantages: the same as a heat stabilizer, a lead compound PVC material without compromising the excellent electrical properties,
low water absorption and outdoor weatherability. Disadvantages: Toxic; would cross contamination; generate lead chloride, forming
streaks on finished products; than Stabilizers for pipe significant; immediately so often lead stabilizers in PVC products become opaque, and soon after
continuous heat discoloration. With the ban of lead, "Twelve Five" period while the proportion of lead stabilizers in PVC heat
stabilizers will be reduced year by year. Metal soap stabilizer monomer salt (acid salts): zinc stearate, barium stearate, calcium
stearate, lead stearate, cadmium stearate Metal soap Aluminum hydroxide salt composite stabilizer: calcium zinc stabilizers, barium zinc stabilizer, barium cadmium stabilizers, barium cadmium
zinc stabilizer organic tin stabilizer
Advantages: PVC stabilizer organotin heat stabilizers for the most efficient, transparent and non-toxic products in the most widely
used of a class, its outstanding advantages: good thermal stability, transparency, and most of the non-toxic.
Disadvantages: PVC stabilizer high prices, no lubrication.
Most of the liquid organic tin, only a few PVC plasticizer solid. May be used alone, often with a metal soap. Rare Stabilizer: no lubrication,
should join with the lubricant, the current production of rare earth compound stabilizer is rare, heat stabilizers and lubricants
compound formed, the amount is usually 4-6 copies. Another class of organic antimony stabilizer, a liquid stabilizer.
low water absorption and outdoor weatherability. Disadvantages: Toxic; would cross contamination; generate lead chloride, forming
streaks on finished products; than Stabilizers for pipe significant; immediately so often lead stabilizers in PVC products become opaque, and soon after
continuous heat discoloration. With the ban of lead, "Twelve Five" period while the proportion of lead stabilizers in PVC heat
stabilizers will be reduced year by year. Metal soap stabilizer monomer salt (acid salts): zinc stearate, barium stearate, calcium
stearate, lead stearate, cadmium stearate Metal soap Aluminum hydroxide salt composite stabilizer: calcium zinc stabilizers, barium zinc stabilizer, barium cadmium stabilizers, barium cadmium
zinc stabilizer organic tin stabilizer
Advantages: PVC stabilizer organotin heat stabilizers for the most efficient, transparent and non-toxic products in the most widely
used of a class, its outstanding advantages: good thermal stability, transparency, and most of the non-toxic.
Disadvantages: PVC stabilizer high prices, no lubrication.
Most of the liquid organic tin, only a few PVC plasticizer solid. May be used alone, often with a metal soap. Rare Stabilizer: no lubrication,
should join with the lubricant, the current production of rare earth compound stabilizer is rare, heat stabilizers and lubricants
compound formed, the amount is usually 4-6 copies. Another class of organic antimony stabilizer, a liquid stabilizer.
2014年4月1日星期二
The main ingredient of PVC stabilizer
PVC stabilizer on the original white and gradually turn yellow - red - brown - black. PVC resin decomposition reaction is due to the de-HCL caused a chain reaction, leading to macromolecules strand breaks. PVC heat stabilizers to prevent thermal decomposition mechanism is through the following aspects to achieve. (1) by capturing the thermal PVC lubricants decomposition of PVC HCl, to prevent catalytic degradation of HCl. The main mechanism of action of lead salts class here, in addition to metal soaps, organic tin, phosphorous lipids and epoxy 2) replacement lively allyl chloride atoms. Metallic soaps, lipids and organic phosphorous tin can here the role of the mechanism. 3) the reaction with free radicals, the radical termination reaction. Organic tin and phosphorous lipid mechanism role here. (4) with conjugated double bond, inhibit growth of conjugated chain. Organotin role and PVC plasticizer mechanism of epoxy here. (5) the decomposition of peroxide to reduce the number of free radicals. Organic tin and phosphorous lipid mechanism role here. 6) HCl passivation effect of a catalytic metal ion removal. PVC stabilizer with a stabilizer according to several different mechanisms to achieve thermal stability purposes. Composite stabilizer can be divided into the following categories: (1) liquid barium zinc composite stabilizer is generally pale yellow to yellow-brown oily liquid, specific gravity 1.0-1.1, good heat resistance at room temperature, without sulfide pollution, and epoxy plasticizers and stabilizing effect can be improved by, it can activate the foaming agent. 2 main Polyethylene wax ingredient liquid calcium zinc composite stabilizer nontoxic liquid calcium zinc stabilizers are calcium stearate, castor oil, calcium, zinc stearate, castor oil, zinc and epoxy soybean oil, ultraviolet absorber. Hugh liquid calcium zinc stabilizers are generally used more soluble in organic solvents having a carbon number of less fat fat calcium and zinc. Because of the different components, varied in nature, usually pale yellow to yellow clear oily liquid at room temperature gravity of 1.0-1.05. It is non-toxic PVC stabilizer, mainly for food packaging films, containers leather foam stabilizers.
2014年3月25日星期二
China is a major WSD one pack stabilizer producer of PVC is also the world 's largest consumer of
China is a major producer of PVC , but also the world's largest consumer. 2007 China PVC production capacity has reached 14.5 million , t increase of 45 % compared to 2006 , the average annual growth rate for the world nine times , accounting for 30 % of the world 's total PVC . With the further expansion of PVC production capacity , demand for PVC heat stabilizers also continue to rise. Since the mid- 1950s , China began producing self- supporting since PVC heat stabilizers , heat stabilizers for PVC consumption With the rapid development of the industry and a substantial increase in heat stabilizers developed into the second largest plastics additives products. At present, China plastic heat stabilizer production enterprises have more than 100 , while the low-end of the lead salt heat stabilizer is still overwhelmingly dominant , industry 60% of enterprises due to technical reasons plastic processing aid only to produce lead salt -based heat stabilizers , domestic PVC products in more than 65% or the use of lead salt heat stabilizer ( metal soap and composite metal soap is also part of the lead soap heat stabilizers ) , the annual amount of up to about 120 000 t. To avoid potential lead contamination , improve people's living environment , China since 2003 began a comprehensive campaign to ban lead . Ministry of Construction in 2004 began requiring the use of non- national lead salt water pipes PVC heat stabilizers ; Beijing from April 1, 2005 began restricting the use of lead- salt heat stabilizer PVC pipes for drinking water ; power system also introduced a ban within the grid regulations governing the use of chlorinated PVC protective lead salts and organic tin heat stabilizer to prevent environmental pollution, especially pollution of groundwater sources . PVC profiles have now begun to explore the lead-free. China's environmental PVC heat stabilizerprotection type calcium / zinc heat stabilizers are still dependent on foreign imports , but the price is expensive, imported calcium / zinc heat stabilizers are generally in the 3 to 5 million /; t because the domestic PVC heat stabilizer production of PVC heat stabilizers business technology behind domestic calcium / zinc complex heat organic pigments stabilizer market is still unable to meet performance requirements . Lead salt heat stabilizer deadline can not be disabled , to some extent hindered the goal of a comprehensive ban on schedule to achieve the lead pollution of the environment still exist and are widening. Carry out the role of non-toxic compound heat stabilizer technology research and development , and to achieve large-scale domestic production , to ensure the sustainable development of economy, society, environment build harmonious relationship between man and nature , have very important .
WSD PVC stabilizer and many types of different combinations
PVC stabilizers, and many different types of combinations , generally can be divided according to the chemical composition of the lead salt , metal soaps ( such as stearic acid metal soaps, including barium, cadmium , calcium, lead and zinc soaps , etc. ) , organic tin epoxy esters and chelating agents ( such as phosphorous acid ) and the like. Currently, lead salt stabilizer is still the largest amount of a stabilizer . 1999 in North America , Western Europe, Japan, the consumption structure of heat stabilizers are listed in Table 1-1. Lead salt stabilizer total heat stabilizers PVC stabilizer in the share , with the countries and regions vary. 60,50 and 17% , accounting for the total heat stabilizers Western Europe, Japan and North America lead salt stabilizer. In these products , a product can be made into powder, granular, flake and pellets can melt and the like. " A package " is likely to exist between the additive type product synergies , thereby enhancing the stability of results, and eliminates the need for cumbersome calculation for each additive , easy to use and store the user , but also to reduce waste of resources and environmental pollution . Representative products in foreign markets have AKGros of Interlite series. Development of rare earth and composite metal soaps such as non-toxic stabilizer is one of the development trend of heat stabilizer industry internationally . 1999 in North America, Western Europeplastic processing aid and Japan, consumption of heat stabilizers were about 8, 16 and 70 thousand tons / a, a total of about 310,000 t / a, is expected to demand in 2004 in North America and Western Europe, heat stabilizers are 10 and 170,000 tons in 1999 to 2004 , the average growth rates of 4.2% and 1.0%. Japanese demand is maintained at about 70,000 tons . Lead salt heat stabilizer below the average growth rate of demand growth or negative growth trend, and composite ( especially toxic Ca / Zn) heat stabilizers demand growth higher than the average growth rate , the reason is that strict environmental regulations worldwide technology , national attention to the environment due to human survival . Due to the global limit toxic heavy metal salts used in PVC processing , product adjustment to accelerate the pace of new products , development of new formulations of very active.
2014年3月19日星期三
Soap is a general term WSD PVC stabilizerfor a fatty acid salt
Soaps are salts of fatty acids in general. Formula RCOOM, wherein RCOO is a fatty acid radical , M is a metal ion . Fatty acid soap daily typically 10-18 carbon atoms , a metal mainly alkali metal such as PVC stabilizer sodium or potassium , and is also useful for some organic bases such as ammonia, ethanolamine , triethanolamine soap made for special purposes . Broadly , grease, wax , rosin or fatty acids, fatty acid salts and alkalis from the saponification or neutralization reaction proceeds , and can be called a soap. Soap soluble in water, washing decontamination effect. There are all kinds of soap soap, also known as toilet soap, soap and composite metalPVC plasticizer soap . Other metal ( alkaline earth metal or heavy metal ) salts of fatty acids , insoluble or sparingly soluble in water , and no cleaning effects collectively referred to as metal soap as a lubricant. Complex soap is a mixture of soap and the right amount of lime soap dispersant made resistant to hard water , soap scum washed, not born .
PVC stabilizer heat discoloration Comment
Ideal PVC structure is the first - the tail structure-CH2-CHCl-CH2-CHCl-, is quite stable. But so far the synthesis method can not be like PVC synthetic butadiene rubber as a catalyst in the role WSD PVC flame retardant of Jigger be oriented so that there are rules cis-butadiene polymerization. All kinds of heat stabilizer heat discoloration Comment
Thermal stabilizers should preferably absorb both HCL, to eliminate the active site, the addition of a conjugated polyene chain, carbenium salt damage, etc. to prevent auto-oxidation, which does not produce the product of the catalytic degradation of PVC. The actual heat stabilizers have different functions due to exhibit different thermal stability characteristics, can WSD Titanium dioxide rutile be divided into early-type, long-term, intermediate-and versatile four. A) cadmium, zinc soap is typical of early-type heat stabilizers, can quickly absorb HCL, and effectively substituted with carboxylate PVC unstable chlorine atom in the catalytic chain Cd, Zn, thereby effectively suppressing early degradation and coloring , but because of the consumption of fast and transformation products CdC12, ZnC12, but also off the HCL efficient catalyst PVC, PVC and thus lead to the degradation of the material suddenly vicious black, so poor long-term thermal stability. 2) barium, calcium soaps are typically long-term thermal stabilizers, absorption HCL function only and therefore can not inhibit coloring PVC, but the conversion WSD one pack stabilizer product BaC12, CaC12 do not have catalytic activity, does not cause a sudden black PVC, long-term heat stability better. 3) fatty acids, organic tin are intermediate, both absorption HCL, can effectively replace with carboxylate unstable chlorine atoms PVC chain, and transformation products do not have catalytic activity. 4) mercaptan organotin it has versatile features, while a variety of mechanisms can stabilize PVC, transformation products do not have catalytic activity, and therefore both excellent initial and long-term thermal stability effect.
Thermal stabilizers should preferably absorb both HCL, to eliminate the active site, the addition of a conjugated polyene chain, carbenium salt damage, etc. to prevent auto-oxidation, which does not produce the product of the catalytic degradation of PVC. The actual heat stabilizers have different functions due to exhibit different thermal stability characteristics, can WSD Titanium dioxide rutile be divided into early-type, long-term, intermediate-and versatile four. A) cadmium, zinc soap is typical of early-type heat stabilizers, can quickly absorb HCL, and effectively substituted with carboxylate PVC unstable chlorine atom in the catalytic chain Cd, Zn, thereby effectively suppressing early degradation and coloring , but because of the consumption of fast and transformation products CdC12, ZnC12, but also off the HCL efficient catalyst PVC, PVC and thus lead to the degradation of the material suddenly vicious black, so poor long-term thermal stability. 2) barium, calcium soaps are typically long-term thermal stabilizers, absorption HCL function only and therefore can not inhibit coloring PVC, but the conversion WSD one pack stabilizer product BaC12, CaC12 do not have catalytic activity, does not cause a sudden black PVC, long-term heat stability better. 3) fatty acids, organic tin are intermediate, both absorption HCL, can effectively replace with carboxylate unstable chlorine atoms PVC chain, and transformation products do not have catalytic activity. 4) mercaptan organotin it has versatile features, while a variety of mechanisms can stabilize PVC, transformation products do not have catalytic activity, and therefore both excellent initial and long-term thermal stability effect.
2014年3月11日星期二
Development of PVC stabilizer
PVC water pipe product features a high-impact , high toughness and impact resistance compared with the same specifications of the ordinary PVC-U pipes, impact resistance increased significantly, to more effectively resist point loads and uneven ground subsidence . 2, anti- water hammer can effectively improve the ability to resist water hammer , to prevent WSD aluminium stearate damage to the pipeline in the operation process . 3 , resistance to environmental cracking performance improvement , installation and effective against external shocks during transportation of the pipe. 4 , strong chemical resistance tubing with a strong chemical resistance and can be used with any applicable to ordinary PVC-U pipes occasions. 5 , the cost is lower than the PE pipe, and because the pipe wall thickness than the thin PVC-U , PVC-U and considerable cost , superior performance , has promotional value , there is instead of PVC-U, the development trend of PE pipe .
Because of high impact PVC water pipe system, the viscosity is large, high stability and workability requirements , most WSD Metallic stearate manufacturers use imported organic tin stabilizers and calcium zinc stabilizers. Initial coloring and stability of organotin stabilizers better, but since most manufacturers also produce leaded pipes and tubes , mixing systems and broken material difficult to handle , and the ingredients, the smell is relatively large , limiting the use of organic tin ; the cost of imported calcium and zinc is relatively high, for the comprehensive promotion of high impact PVC water pipe disadvantage. Therefore, strengthening the development of high impact PVC water pipe into the domestic calcium zinc stabilizers calcium zinc stabilizers domestic industry important topics and tasks.
Second, the real one , identify the major raw materials and formulations
A, PVC resin using the K value 66-68 PVC powder , PVC-U pipes and resin used in the same B, titanium dioxide and color pigments adjusted according to the requirements of pipe , titanium dioxide rutile titanium dioxide to use in order to improve weatherability pipe sex . C, the modifier is optional rigid inorganic ultrafine inorganic rigid material , special WSD stearic acid surface active agent, a dispersing agent processing , so that the inorganic material can be uniformly coated on the surface of the PVC molecules , when the external force , the inorganic particles and between the resin matrix to produce crazing , can absorb impact energy , and thus the choice of rigid inorganic modifiers to reduce costs , while improving the pipe rigidity and toughness , so as to achieve " just tough balance" ; but when inorganic modifier added to after a certain amount of impact resistance PVC water pipe and high impact resistant hydraulic performance will decline , D, calcium and zinc composite stabilizer is calcium stearate, zinc stearate as the main metal soaps , combined polyol , Β- diketones, phosphite antioxidants and other auxiliary stabilizer and lubricant made of a class of complex optimization of non-toxic environmentally friendly stabilizer, has good early color and long-term thermal stability ; PVC material can be appropriately increased toughness ; efficient with internal lubricant and external lubricant esters , etc., while the adsorption of the stabilizer itself , the production process can reduce the precipitation of the growth cycle E, the impact modifier is a compound for the supply of high-impact PVC tube designed to improve the impact modifier preferably has a PVC material , which is made of a rubber elastic body is a synergistic effect , predetermined elastomers, elastomers and non- promoting agents predetermined composition . Impact modifier different toughening mechanism is different, and the compatibility of PVC resin are different , so by promoting agent may be different between the elastomer fine particles isolated from each other , preventing agglomeration , to promote the dispersion of PVC matrix and compatibility uniformly dispersed in the resin matrix , promoting toughening effect.
Because of high impact PVC water pipe system, the viscosity is large, high stability and workability requirements , most WSD Metallic stearate manufacturers use imported organic tin stabilizers and calcium zinc stabilizers. Initial coloring and stability of organotin stabilizers better, but since most manufacturers also produce leaded pipes and tubes , mixing systems and broken material difficult to handle , and the ingredients, the smell is relatively large , limiting the use of organic tin ; the cost of imported calcium and zinc is relatively high, for the comprehensive promotion of high impact PVC water pipe disadvantage. Therefore, strengthening the development of high impact PVC water pipe into the domestic calcium zinc stabilizers calcium zinc stabilizers domestic industry important topics and tasks.
Second, the real one , identify the major raw materials and formulations
A, PVC resin using the K value 66-68 PVC powder , PVC-U pipes and resin used in the same B, titanium dioxide and color pigments adjusted according to the requirements of pipe , titanium dioxide rutile titanium dioxide to use in order to improve weatherability pipe sex . C, the modifier is optional rigid inorganic ultrafine inorganic rigid material , special WSD stearic acid surface active agent, a dispersing agent processing , so that the inorganic material can be uniformly coated on the surface of the PVC molecules , when the external force , the inorganic particles and between the resin matrix to produce crazing , can absorb impact energy , and thus the choice of rigid inorganic modifiers to reduce costs , while improving the pipe rigidity and toughness , so as to achieve " just tough balance" ; but when inorganic modifier added to after a certain amount of impact resistance PVC water pipe and high impact resistant hydraulic performance will decline , D, calcium and zinc composite stabilizer is calcium stearate, zinc stearate as the main metal soaps , combined polyol , Β- diketones, phosphite antioxidants and other auxiliary stabilizer and lubricant made of a class of complex optimization of non-toxic environmentally friendly stabilizer, has good early color and long-term thermal stability ; PVC material can be appropriately increased toughness ; efficient with internal lubricant and external lubricant esters , etc., while the adsorption of the stabilizer itself , the production process can reduce the precipitation of the growth cycle E, the impact modifier is a compound for the supply of high-impact PVC tube designed to improve the impact modifier preferably has a PVC material , which is made of a rubber elastic body is a synergistic effect , predetermined elastomers, elastomers and non- promoting agents predetermined composition . Impact modifier different toughening mechanism is different, and the compatibility of PVC resin are different , so by promoting agent may be different between the elastomer fine particles isolated from each other , preventing agglomeration , to promote the dispersion of PVC matrix and compatibility uniformly dispersed in the resin matrix , promoting toughening effect.
2014年3月9日星期日
Heat stabilizer is mainly used for PVC and other chlorinated polymers
PVC is mainly used for PVC heat stabilizers and other chlorinated
polymers. PVC has been found only in the plastic molding process to above
160 ℃, while it is in the 120 ~ 130 ℃ thermal decomposition begins,
releasing HCl gas, HCl is generated if it does not inhibit the
decomposition will further exacerbate this problem has been plagued The
main problem of development and application of PVC plastic.
The study found that if the amount of PVC-containing plastics, such as
lead salts, metal soaps, phenols, aromatic amines and other impurities,
which will not affect the processing and application, but also to some
extent, delaying the thermal decomposition effect. The above problem can
be solved, thus contributing to the establishment of research in the field
of heat stabilizers and continue to develop. PVC heat stabilizer is
polyvinyl chloride (PVC) processing essential additives. With concern for
human health and ecological environment growing, countries have
promulgated a series of laws and decrees, and take various measures to
limit the use of heavy metal heat stabilizers containing lead, cadmium and
other. Outside the industry generally believe, PVC heat stabilizers
environmental protection has become the development trend will not be
reversed. In recent years, the process of environmental protection PVC
heat stabilizers, instead of the traditional WSD Plastic impact modifier lead, cadmium heat
stabilizer, research and development of non-toxic, non-polluting, complex,
and efficient heat stabilizers has been more widely appreciated, its
synthesis and applied research made a lot of WSD stearic acid new progress.
With the implementation of the people's awareness of environmental
protection regulations and decrees, PVC heat stabilizers to be non-toxic
and environmentally friendly direction of the trend. Our heat stabilizer
industry should conform to this trend and accelerate the pace of
structural adjustment, increase calcium zinc stabilizers, organic
stabilizer environmental products research and WSD Metallic stearate development efforts,
emphasis on research auxiliary heat stabilizers and heat stabilizers
complex system, and promote China environmental process PVC heat
stabilizers.
polymers. PVC has been found only in the plastic molding process to above
160 ℃, while it is in the 120 ~ 130 ℃ thermal decomposition begins,
releasing HCl gas, HCl is generated if it does not inhibit the
decomposition will further exacerbate this problem has been plagued The
main problem of development and application of PVC plastic.
The study found that if the amount of PVC-containing plastics, such as
lead salts, metal soaps, phenols, aromatic amines and other impurities,
which will not affect the processing and application, but also to some
extent, delaying the thermal decomposition effect. The above problem can
be solved, thus contributing to the establishment of research in the field
of heat stabilizers and continue to develop. PVC heat stabilizer is
polyvinyl chloride (PVC) processing essential additives. With concern for
human health and ecological environment growing, countries have
promulgated a series of laws and decrees, and take various measures to
limit the use of heavy metal heat stabilizers containing lead, cadmium and
other. Outside the industry generally believe, PVC heat stabilizers
environmental protection has become the development trend will not be
reversed. In recent years, the process of environmental protection PVC
heat stabilizers, instead of the traditional WSD Plastic impact modifier lead, cadmium heat
stabilizer, research and development of non-toxic, non-polluting, complex,
and efficient heat stabilizers has been more widely appreciated, its
synthesis and applied research made a lot of WSD stearic acid new progress.
With the implementation of the people's awareness of environmental
protection regulations and decrees, PVC heat stabilizers to be non-toxic
and environmentally friendly direction of the trend. Our heat stabilizer
industry should conform to this trend and accelerate the pace of
structural adjustment, increase calcium zinc stabilizers, organic
stabilizer environmental products research and WSD Metallic stearate development efforts,
emphasis on research auxiliary heat stabilizers and heat stabilizers
complex system, and promote China environmental process PVC heat
stabilizers.
2014年3月2日星期日
Some excellent performance of one pack stabilizer
Multiple selection is based rare earth oxides and rare earth chlorides , oxides and chlorides mostly single one or a mixture of lanthanum, cerium , praseodymium, neodymium and other light rare earths.
Rare earth elements have similar chemical properties and abnormal active , with many tracks can be accepted as a central ion ligand lone pair of electrons, while the rare earth metal ion has a larger ion radius , with inorganic or organic ligands primarily by electrostatic attraction forming ions bond , as the central atom complex , often d2SP3, d4dP3, f3d5Ssp3 other hybrid forms form complexes with a median of 6-12 .
REE excellent mechanical properties and their grouping principles are concerned with the geometric properties of rare WSD Metallic stearate earth elements . Because the radius of the atoms and ions are important factors that determine the configuration , hardness , density and physical properties such as melting point of the crystals at room temperature , atmospheric conditions , rare earth metal lanthanum, praseodymium , neodymium, double- hexagonal crystal structure, and the cubic cerium crystal density ( centroid ) structure, when the temperature and pressure changes , the majority of the rare earth metal transition of crystal . Because lanthanide contraction lanthanide atomic radius , atomic volume decreases with increasing atomic number , the density increases with the atomic number , compared with lanthanum , cerium , praseodymium , neodymium , abnormal phenomenon .
Lanthanum , cerium, praseodymium , neodymium , lanthanum is the most chemically active , but only trivalent lanthanum C1 RECl being generated complex and this complex is unstable , and WSD Chlorinated paraffin cerium , praseodymium these expensive rare earth ions the ability to form complexes with Cl stronger than the trivalent lanthanum , they form a stable complex ions and negative Cl ligands , therefore , in the selection of rare earth thermal stabilizer to comprehensive lanthanum, cerium , praseodymium, neodymium respective advantages in different applications , one with its high-purity single , hybrid , or a reasonable match.
The rare earth ion is typically hard cations, i.e. ions easily deformed polarization , which base is equipped with hard metal atoms , such as oxygen strong complexing ability . The rare earth compound of CaC03 coupling effect due to the presence of the chain between the rare earth ions and chloride ions in the strong PVC ligand interactions conducive transmit shear force so that the rare earth compounds can effectively accelerate the gelation of PVC , can be promote PVC plasticizers , processing aids, but also play a role in the ACR . Meanwhile, the rare earth metal ions and ligands CPE in C1 , can play its role more CPE toughening modification . The adequacy of these performance play balance or not, and in the rare earth complex compound additive has a significant relationship , complex lubrication system , processing the modified system is crucial , so complex process of good bad a direct impact on the performance of multi-functional complexes of rare earth stabilizer . Excellent performance rare earth stabilizer should have the following features:
( 1 ) excellent thermal stability
Static and dynamic thermal stability, both tin WSD Polyethylene wax and Beijing 8831 is quite good in the lead salts and metallic soaps , four times three times and lead salts Ba / Zn composite stabilizer. Complex can become toxic, transparent, and may partially replace the organotin stabilizers are widely used. Mechanism for the capture of rare earth stabilizer HCl and allyl chloride atom replaced with an auxiliary stabilizer epoxy has good synergy.
( 2 ) coupling effect
Coupled with excellent effect , compared with the lead salt , good compatibility with PVC role for the PVC-CaCO, system coupling effect is better, help to improve the PVC plastic door and window profile strength. Weld strength rare earth stabilizer processing PVC profiles PVC profiles weld strength than lead salt stabilizer to high raw material prices are also higher.
Rare earth elements have similar chemical properties and abnormal active , with many tracks can be accepted as a central ion ligand lone pair of electrons, while the rare earth metal ion has a larger ion radius , with inorganic or organic ligands primarily by electrostatic attraction forming ions bond , as the central atom complex , often d2SP3, d4dP3, f3d5Ssp3 other hybrid forms form complexes with a median of 6-12 .
REE excellent mechanical properties and their grouping principles are concerned with the geometric properties of rare WSD Metallic stearate earth elements . Because the radius of the atoms and ions are important factors that determine the configuration , hardness , density and physical properties such as melting point of the crystals at room temperature , atmospheric conditions , rare earth metal lanthanum, praseodymium , neodymium, double- hexagonal crystal structure, and the cubic cerium crystal density ( centroid ) structure, when the temperature and pressure changes , the majority of the rare earth metal transition of crystal . Because lanthanide contraction lanthanide atomic radius , atomic volume decreases with increasing atomic number , the density increases with the atomic number , compared with lanthanum , cerium , praseodymium , neodymium , abnormal phenomenon .
Lanthanum , cerium, praseodymium , neodymium , lanthanum is the most chemically active , but only trivalent lanthanum C1 RECl being generated complex and this complex is unstable , and WSD Chlorinated paraffin cerium , praseodymium these expensive rare earth ions the ability to form complexes with Cl stronger than the trivalent lanthanum , they form a stable complex ions and negative Cl ligands , therefore , in the selection of rare earth thermal stabilizer to comprehensive lanthanum, cerium , praseodymium, neodymium respective advantages in different applications , one with its high-purity single , hybrid , or a reasonable match.
The rare earth ion is typically hard cations, i.e. ions easily deformed polarization , which base is equipped with hard metal atoms , such as oxygen strong complexing ability . The rare earth compound of CaC03 coupling effect due to the presence of the chain between the rare earth ions and chloride ions in the strong PVC ligand interactions conducive transmit shear force so that the rare earth compounds can effectively accelerate the gelation of PVC , can be promote PVC plasticizers , processing aids, but also play a role in the ACR . Meanwhile, the rare earth metal ions and ligands CPE in C1 , can play its role more CPE toughening modification . The adequacy of these performance play balance or not, and in the rare earth complex compound additive has a significant relationship , complex lubrication system , processing the modified system is crucial , so complex process of good bad a direct impact on the performance of multi-functional complexes of rare earth stabilizer . Excellent performance rare earth stabilizer should have the following features:
( 1 ) excellent thermal stability
Static and dynamic thermal stability, both tin WSD Polyethylene wax and Beijing 8831 is quite good in the lead salts and metallic soaps , four times three times and lead salts Ba / Zn composite stabilizer. Complex can become toxic, transparent, and may partially replace the organotin stabilizers are widely used. Mechanism for the capture of rare earth stabilizer HCl and allyl chloride atom replaced with an auxiliary stabilizer epoxy has good synergy.
( 2 ) coupling effect
Coupled with excellent effect , compared with the lead salt , good compatibility with PVC role for the PVC-CaCO, system coupling effect is better, help to improve the PVC plastic door and window profile strength. Weld strength rare earth stabilizer processing PVC profiles PVC profiles weld strength than lead salt stabilizer to high raw material prices are also higher.
2014年2月24日星期一
Some major effects of barium zinc PVC stabilizer
Stabilizer introduced in the benzene ring is a new attempt. Improve the
relative molecular mass of organic tin stabilizer , but also a new
research trends. Main ways : organic tin stabilizer own high molecular
weight , the formation of polymeric organic tin ; unsaturated organic tin
compounds with the appropriate monomers to improve its relative molecular
mass ; middle with bifunctional compounds and organotin organotin body
molecules to form a molecule containing a plurality of tin atoms to
improve their relative molecular mass and the like. Avoid small relative
molecular mass and volatile due to become odorless "clean " type organotin
stabilizers . Their constituents , except barium soap , zinc soap , there
phosphites and coloring preventing agent. The new high performance
phosphite emerging, prompted the rapid development WSD PVC flame retardant of such stabilizers .
Especially in recent years β- diketones as preventing the use of initial
coloring agent to make the performance of barium zinc stabilizer class
more perfect. The main advantages : superior weatherability barium -
cadmium stabilizers; improved cold can reduce the amount of phosphate type
auxiliary plasticizer .
Barium zinc stabilizer is mainly used for rolling and plasticized PVC
plastisol processing , but also from the product into powder and liquid
form . Can be compared with liquid barium cadmium stabilizers thermal
stability of liquid barium zinc stabilizer compatibility with commonly
used plasticizer in PVC as well as a stable and WSD zinc stearate transparent terms . Also
recently appeared on the market a new barium zinc products , the product
tasteless, non fouling phenomena in the processing of the plasticized PVC
, and exhibits excellent self- lubricating effect . Barium zinc stabilizer
slightly inferior in light stability , can be compensated with an epoxy
plasticizer and an ultraviolet absorber. Also WSD Polyethylene wax barium metal, although a
very small solubility in water , but if access to the gastrointestinal
tract , the stomach acid to increase its solubility, greater toxicity, and
therefore is limited in recent years in many applications.
relative molecular mass of organic tin stabilizer , but also a new
research trends. Main ways : organic tin stabilizer own high molecular
weight , the formation of polymeric organic tin ; unsaturated organic tin
compounds with the appropriate monomers to improve its relative molecular
mass ; middle with bifunctional compounds and organotin organotin body
molecules to form a molecule containing a plurality of tin atoms to
improve their relative molecular mass and the like. Avoid small relative
molecular mass and volatile due to become odorless "clean " type organotin
stabilizers . Their constituents , except barium soap , zinc soap , there
phosphites and coloring preventing agent. The new high performance
phosphite emerging, prompted the rapid development WSD PVC flame retardant of such stabilizers .
Especially in recent years β- diketones as preventing the use of initial
coloring agent to make the performance of barium zinc stabilizer class
more perfect. The main advantages : superior weatherability barium -
cadmium stabilizers; improved cold can reduce the amount of phosphate type
auxiliary plasticizer .
Barium zinc stabilizer is mainly used for rolling and plasticized PVC
plastisol processing , but also from the product into powder and liquid
form . Can be compared with liquid barium cadmium stabilizers thermal
stability of liquid barium zinc stabilizer compatibility with commonly
used plasticizer in PVC as well as a stable and WSD zinc stearate transparent terms . Also
recently appeared on the market a new barium zinc products , the product
tasteless, non fouling phenomena in the processing of the plasticized PVC
, and exhibits excellent self- lubricating effect . Barium zinc stabilizer
slightly inferior in light stability , can be compensated with an epoxy
plasticizer and an ultraviolet absorber. Also WSD Polyethylene wax barium metal, although a
very small solubility in water , but if access to the gastrointestinal
tract , the stomach acid to increase its solubility, greater toxicity, and
therefore is limited in recent years in many applications.
2014年2月17日星期一
Some simple exposition Heat stabilizer for
Environmental problems due to the toxicity of lead and, in the most common case of a zinc, barium and calcium-zinc stabilizers are quickly replaced by a more efficient formulation of barium-lead. Lead systems can be provided close to the processing stability of the novel stabilizer is continuously developed in order to achieve lead-free stabilizer. This occurs due to government regulations and the high cost of waste disposal.
A combination of zinc and secondary phosphite stabilizer components with food grade calcium in the food packaging film has been applied aspects.
Most plasticizers used in soft products, the plasticizer-containing epoxy esters, such as diglycidyl ester, epoxy fatty acid ester. Reacting the epoxide with hydrogen chloride as an auxiliary stabilizer.
Because of the unique electrical properties of the lead compound, in the wire and cable coating dominate the market, some of the metal in the coating mix applied as an auxiliary stabilizer.
Hard products: rigid PVC products in the North American market, although there are some wrong, mixed metal, antimony esters using flow-based, but most are using stabilizers containing tin. In other parts of the world, especially when used as a profile, is gradually replacing lead stabilizers barium a stabilizer, which is due to the problems discussed above pan. However, due to the potential environmental factors in these applications CKS gradually calcium-zinc and organic tin instead of lead.
Pipe: PVC rigid PVC pipe is unique to the largest market, the majority of the pipe is in the twin-screw extruder processing. Since the heating time is short, and therefore the use of lower concentrations of organotin stabilizers stream. These pipe grade tin content of the stabilizer may use to 4-10% less, per 100 parts of the polymer is generally 0.4 parts (twin screw extrusion), while the single screw extruder 0.6-1 .0 copies. Stabilizer for drinking water pipes must comply with the requirements of independent certification bodies.
Injection: With the emergence reciprocating screw injection molding resins suitable for the requirements, and has successfully developed a highly efficient stabilizers and obtained a very large WSD Chrolinated polyethylene part (35 pounds).
While the lower molecular weight resin is more easily processed, but the high shear injection mold typically require a 25% containing 14% tin organotin ester stream.
Blow molding: the proper selection of the organic tin blow molding is critical because there is a starting color, fragrance, transparency additional requirements play a decisive role in the generic article are sulfuric acid ester and dibutyltin tin methyl ester. Although the methyl esters of tin and tin have FDA permission, but the main use of food-grade applications octyl tin.
Membrane and sheet: extrusion and calendering are used to process rigid PVC sheet and membrane, the membrane and the WSD Titanium dioxide rutile sheet is typically used as stabilizers for use with bottles.
Siding and outer profiles: For stabilizers for PVC siding and window frame materials, weather resistance and durability to maintain color of the additional requirements. Long term studies have determined the structure of these organotin optimal use.
In North America, the single / double sulfates are present preferred organotin stabilizers have been traditionally used in the European metal mixture also increases its appeal.
In North America, the high amount of titania used WSD Aluminum hydroxide well to prevent ultraviolet. This fact coupled with higher productivity are required to provide more organotin excellent processing stability.
A combination of zinc and secondary phosphite stabilizer components with food grade calcium in the food packaging film has been applied aspects.
Most plasticizers used in soft products, the plasticizer-containing epoxy esters, such as diglycidyl ester, epoxy fatty acid ester. Reacting the epoxide with hydrogen chloride as an auxiliary stabilizer.
Because of the unique electrical properties of the lead compound, in the wire and cable coating dominate the market, some of the metal in the coating mix applied as an auxiliary stabilizer.
Hard products: rigid PVC products in the North American market, although there are some wrong, mixed metal, antimony esters using flow-based, but most are using stabilizers containing tin. In other parts of the world, especially when used as a profile, is gradually replacing lead stabilizers barium a stabilizer, which is due to the problems discussed above pan. However, due to the potential environmental factors in these applications CKS gradually calcium-zinc and organic tin instead of lead.
Pipe: PVC rigid PVC pipe is unique to the largest market, the majority of the pipe is in the twin-screw extruder processing. Since the heating time is short, and therefore the use of lower concentrations of organotin stabilizers stream. These pipe grade tin content of the stabilizer may use to 4-10% less, per 100 parts of the polymer is generally 0.4 parts (twin screw extrusion), while the single screw extruder 0.6-1 .0 copies. Stabilizer for drinking water pipes must comply with the requirements of independent certification bodies.
Injection: With the emergence reciprocating screw injection molding resins suitable for the requirements, and has successfully developed a highly efficient stabilizers and obtained a very large WSD Chrolinated polyethylene part (35 pounds).
While the lower molecular weight resin is more easily processed, but the high shear injection mold typically require a 25% containing 14% tin organotin ester stream.
Blow molding: the proper selection of the organic tin blow molding is critical because there is a starting color, fragrance, transparency additional requirements play a decisive role in the generic article are sulfuric acid ester and dibutyltin tin methyl ester. Although the methyl esters of tin and tin have FDA permission, but the main use of food-grade applications octyl tin.
Membrane and sheet: extrusion and calendering are used to process rigid PVC sheet and membrane, the membrane and the WSD Titanium dioxide rutile sheet is typically used as stabilizers for use with bottles.
Siding and outer profiles: For stabilizers for PVC siding and window frame materials, weather resistance and durability to maintain color of the additional requirements. Long term studies have determined the structure of these organotin optimal use.
In North America, the single / double sulfates are present preferred organotin stabilizers have been traditionally used in the European metal mixture also increases its appeal.
In North America, the high amount of titania used WSD Aluminum hydroxide well to prevent ultraviolet. This fact coupled with higher productivity are required to provide more organotin excellent processing stability.
2014年2月10日星期一
Some of the major role of PVC stabilizer of some
PVC stabilizer is there are many, and see what kind of material you more specific selection. Common are lead salt stabilizer, such stabilizers because of environmental problems have been gradually withdrawing from the international market, but there are some WSD Titanium dioxide rutile domestic manufacturers use when doing no material environmental requirements; metal soap stabilizers, mainly stearic salt, is generally not used alone, often between the metal soaps with each other or with lead salt stabilizer, etc. and use; composite stabilizer, contains more species, zinc composite stabilizer barium, calcium, zinc composite stabilizer, lead salt composite stabilizer, but it should be noted that the lead salt composite stabilizer is the use of technical means to solve some of the small lead salts powder easily float resulting inhalation toxicity problems in the processing of the dispersion there is a certain improvement, but with the ordinary The lead salt stabilizer, like it or not environmentally friendly; organometallic compounds, such as organic tin, antimony organic stabilizers are used in transparent PVC products; organic stabilizers, such stabilizers in the country rarely used; rare earth stabilizer. These are the ingredients from the stabilizer to classify, but it can also be classified as a powder and a liquid, transparent and opaque, not one described here. I hope my answer can bring you some help. A plastic heat stabilizer by type heat stabilizers are a class of polymers can prevent or reduce the heat in the course of processing and degradation or cross-linking additives to extend the life of the composite material. Usual stabilizers can be divided into categories according to the main component of salt, fatty acid soaps, organotin compounds, heat stabilizers, and the pure compound classes of organic compounds.
1) Heat stabilizer salt: salt stabilizer is the combination of the "base" of lead salts of inorganic and WSD stearic acid organic acids, such stabilizer having excellent heat resistance, weather resistance and electrical insulating properties, low cost transparency is poor, there is a certain toxicity, dosage is generally 0.5% to 5.0%. (Source Global polyurethane network) 2) a fatty acid based heat stabilizer: Such a thermal stabilizer is a compound of a fatty acid composition of roots and metal ions, also called metal soap heat stabilizers, acid groups, and its performance and the kind of metal ions , generally the amount of 0.1% to 3.0%. 3) organotin heat stabilizers: class PVC heat stabilizer molecule with chlorine atoms to form unstable ligand and the ligand organotin carboxylate group and a chlorine atom unstable replacement. Features such heat stabilizers are high stability, good transparency, heat resistance, the downside is expensive. 4) Composite type heat stabilizer: Such a thermal stabilizer is a metal salt or soap as WSD Azodicarbonamide a kind of liquid or solid based compound and an organic tin-based compound, wherein the metal salts are calcium - magnesium - zinc, barium - calcium - zinc, barium - zinc and barium - cadmium; common organic acids such as organic acids, naphthenic acid, oleic acid, benzoic acid and salicylic acid.
1) Heat stabilizer salt: salt stabilizer is the combination of the "base" of lead salts of inorganic and WSD stearic acid organic acids, such stabilizer having excellent heat resistance, weather resistance and electrical insulating properties, low cost transparency is poor, there is a certain toxicity, dosage is generally 0.5% to 5.0%. (Source Global polyurethane network) 2) a fatty acid based heat stabilizer: Such a thermal stabilizer is a compound of a fatty acid composition of roots and metal ions, also called metal soap heat stabilizers, acid groups, and its performance and the kind of metal ions , generally the amount of 0.1% to 3.0%. 3) organotin heat stabilizers: class PVC heat stabilizer molecule with chlorine atoms to form unstable ligand and the ligand organotin carboxylate group and a chlorine atom unstable replacement. Features such heat stabilizers are high stability, good transparency, heat resistance, the downside is expensive. 4) Composite type heat stabilizer: Such a thermal stabilizer is a metal salt or soap as WSD Azodicarbonamide a kind of liquid or solid based compound and an organic tin-based compound, wherein the metal salts are calcium - magnesium - zinc, barium - calcium - zinc, barium - zinc and barium - cadmium; common organic acids such as organic acids, naphthenic acid, oleic acid, benzoic acid and salicylic acid.
2014年2月9日星期日
Some of the major purposes of Heat stabilizer
1, Ca-Zn composite heat stabilizer non-toxic, non-harmful heavy metals, can replace traditional lead salt heat stabilizer, safety and health, conducive to environmental protection;
2, has excellent thermal stability and excellent weather resistance, good initial color, light, anti-sulfide contamination, can WSD Metallic stearate significantly improve the outdoor use of PVC products;
3, calcium, zinc and PVC heat stabilizer dispersion, compatibility, anti-precipitated, forming a good processing stability, has a wide processing characteristics can be improved extrusion speed and extend the production cycle;
4, has a unique role in coupling, giving a good filler dispersion, promote and package resin, improve product performance, both toughened and promote melting, can significantly improve the mechanical properties of PVC products, enhanced products compressive blasting Performance. 1) Heat stabilizer salt: salt stabilizer is the combination of the "base" of lead salts of inorganic and organic acids, such stabilizer having excellent heat resistance, weather resistance and electrical insulating properties, low cost transparency is poor, there is a certain toxicity, dosage is generally 0.5% to 5.0%. 2) a fatty acid-based heat stabilizer: Such a thermal stabilizer is a compound consisting of a fatty acid with a metal ion root, also known as hot metal soap stabilizers, its performance and the kind of metal ions and acid WSD chromium oxide radicals, generally in an amount of 0.1% ~ 3.0%. 3) organotin heat stabilizers: class PVC heat stabilizer molecule with chlorine atoms to form unstable ligand and the ligand organotin carboxylate group and a chlorine atom unstable replacement. Features such heat stabilizers are high stability, good transparency, heat resistance, the downside is expensive. Ca-Zn composite heat stabilizer in an efficient, high environmental protection is known, no smell, dispersion, mobility, stability, weather resistance, excellent transparency. At present, both plates, areas of production and processing profiles or plastics, composite stabilizer have become integral. When adding calcium zinc composite heat stabilizer, you first need to consider compatibility with the polymer is added between. If you add a composite stabilizer and polymer compounds produce a certain reaction, eroding the additive effect but will be counterproductive. Compatibility between various plastics additives is also important, not simply add a stabilizer during plastic processing, will add time to pay attention to the role of auxiliaries and additives occur between each other. Different plastics composite stabilizer for added performance, odor, stability, thermal properties and other characteristics different WSD Polyethylene wax requirements, in operation to do to analyze specific issues, select the appropriate composite stabilizer. Also note that when you add another calcium zinc composite heat stabilizer moderation, too much or too little will not achieve the intended stabilizing effect.
2, has excellent thermal stability and excellent weather resistance, good initial color, light, anti-sulfide contamination, can WSD Metallic stearate significantly improve the outdoor use of PVC products;
3, calcium, zinc and PVC heat stabilizer dispersion, compatibility, anti-precipitated, forming a good processing stability, has a wide processing characteristics can be improved extrusion speed and extend the production cycle;
4, has a unique role in coupling, giving a good filler dispersion, promote and package resin, improve product performance, both toughened and promote melting, can significantly improve the mechanical properties of PVC products, enhanced products compressive blasting Performance. 1) Heat stabilizer salt: salt stabilizer is the combination of the "base" of lead salts of inorganic and organic acids, such stabilizer having excellent heat resistance, weather resistance and electrical insulating properties, low cost transparency is poor, there is a certain toxicity, dosage is generally 0.5% to 5.0%. 2) a fatty acid-based heat stabilizer: Such a thermal stabilizer is a compound consisting of a fatty acid with a metal ion root, also known as hot metal soap stabilizers, its performance and the kind of metal ions and acid WSD chromium oxide radicals, generally in an amount of 0.1% ~ 3.0%. 3) organotin heat stabilizers: class PVC heat stabilizer molecule with chlorine atoms to form unstable ligand and the ligand organotin carboxylate group and a chlorine atom unstable replacement. Features such heat stabilizers are high stability, good transparency, heat resistance, the downside is expensive. Ca-Zn composite heat stabilizer in an efficient, high environmental protection is known, no smell, dispersion, mobility, stability, weather resistance, excellent transparency. At present, both plates, areas of production and processing profiles or plastics, composite stabilizer have become integral. When adding calcium zinc composite heat stabilizer, you first need to consider compatibility with the polymer is added between. If you add a composite stabilizer and polymer compounds produce a certain reaction, eroding the additive effect but will be counterproductive. Compatibility between various plastics additives is also important, not simply add a stabilizer during plastic processing, will add time to pay attention to the role of auxiliaries and additives occur between each other. Different plastics composite stabilizer for added performance, odor, stability, thermal properties and other characteristics different WSD Polyethylene wax requirements, in operation to do to analyze specific issues, select the appropriate composite stabilizer. Also note that when you add another calcium zinc composite heat stabilizer moderation, too much or too little will not achieve the intended stabilizing effect.
2014年1月19日星期日
Several Theoretical Issues of PVC heat stabilizers
1 Overview
PVC heat stabilizers are of practical value resin can become
indispensable plastic additives, for decades, the study of the thermal
decomposition mechanism and PVC heat stabilizers of the action, have a
great development, but heat stabilizers some theoretical issues, such
as the commonly used metal soap heat stabilizers, why zinc, cadmium,
aluminum soap in PVC in class early color small, and barium, calcium,
strontium initial coloring on larger? Same as Sn, Sb initial heat
stabilizer why organic carboxylate thermal stabilizer coloring big? And
its corresponding thiol salts early color WSD PVC plasticizer on the small? And so on very
rare reports, the authors try to use the theory of atomic structure
theoretical analysis on some issues, engaged in the production and
application of heat stabilizers colleagues or some benefit.
2, organotin more excellent heat stability of the same alkyl mercaptan
more excellent than the initial thermal stability than the tin
carboxylate organotin carboxylate. The reason is due to the structure
of the tin atoms linked sulfur and oxygen caused by different. Oxygen
and sulfur cycle in the same element as the sixth element, the
difference lies in their different electronic structure. Here I want to
emphasize is: since heat stabilizers stable reaction types, only the
elimination of PVC unstable reactive WSD stearic acid chlorine atoms and anti-oxidation
reaction is fundamentally prevent the degradation of PVC on the cross
Union, others, such as the absorption of hydrogen chloride, carbon ions
and undermine the positive reaction of the double bond are more serious
in PVC has exploded later (already de-HCL, after the formation of a
number of double bonds) remedy, which can eliminate unstable heat
stabilizers have a chlorine atom good initial hue (no or less to form a
double bond).
PVC heat stabilizers eliminate unstable premise that two chlorine
atoms, one of the stabilizer and the metal ions have a strong
complexation unstable chlorine atom; the other is an organic anion of a
strong carbon (C? ?) initial significant complexing capacity, only two
were strong complexing ability of PVC was small. (Nearly colorless,
both strong and mercaptan, the tin mercaptide heat stabilizer for PVC,
PVC excellent in hue, hue holding time is longer).
3, the initial metal soap coloration WSD Chlorinated paraffin and long-term thermal stability of
organotin
3.1 is the beginning of soap coloring
I found an interesting phenomenon at work, the nature of Mg and Ca
soap soap is very similar (initial coloring serious, but a better long
-term thermal stability), and Al and Zn soap soap is very similar
(excellent initial hue and serious "zinc burn" phenomenon); Mg, Ca, Sr,
Ba are the second main group of the periodic elements are similar in
nature, well understood, but it is the third main element Al, and Zn,
Cd is the second sub-group elements, their chemical properties very
similar to what it? Of course, there are diagonal periodicity principle
can explain this phenomenon, but the similarities and differences
between the chemical properties of the elements, the fundamental reason
is the similarities and differences between their atomic structure, its
external representation is characteristic of the original rare earth
heat stabilizer is a unique " Coupling resistance. " Because of this
feature to make it appear to have in the processing of the lubricant
additives and processing characteristics, promote resin plasticizing;
show excellent impact resistance agent effectiveness in increasing the
PVC toughness, improve the mechanical properties of products in the
finished product; with When oxygen-fillers such as CaCO3 and other
effects, the performance of "Capacity" effect, without affecting the
mechanical properties of the conditions that can increase the amount of
CaCO3.
PVC heat stabilizers are of practical value resin can become
indispensable plastic additives, for decades, the study of the thermal
decomposition mechanism and PVC heat stabilizers of the action, have a
great development, but heat stabilizers some theoretical issues, such
as the commonly used metal soap heat stabilizers, why zinc, cadmium,
aluminum soap in PVC in class early color small, and barium, calcium,
strontium initial coloring on larger? Same as Sn, Sb initial heat
stabilizer why organic carboxylate thermal stabilizer coloring big? And
its corresponding thiol salts early color WSD PVC plasticizer on the small? And so on very
rare reports, the authors try to use the theory of atomic structure
theoretical analysis on some issues, engaged in the production and
application of heat stabilizers colleagues or some benefit.
2, organotin more excellent heat stability of the same alkyl mercaptan
more excellent than the initial thermal stability than the tin
carboxylate organotin carboxylate. The reason is due to the structure
of the tin atoms linked sulfur and oxygen caused by different. Oxygen
and sulfur cycle in the same element as the sixth element, the
difference lies in their different electronic structure. Here I want to
emphasize is: since heat stabilizers stable reaction types, only the
elimination of PVC unstable reactive WSD stearic acid chlorine atoms and anti-oxidation
reaction is fundamentally prevent the degradation of PVC on the cross
Union, others, such as the absorption of hydrogen chloride, carbon ions
and undermine the positive reaction of the double bond are more serious
in PVC has exploded later (already de-HCL, after the formation of a
number of double bonds) remedy, which can eliminate unstable heat
stabilizers have a chlorine atom good initial hue (no or less to form a
double bond).
PVC heat stabilizers eliminate unstable premise that two chlorine
atoms, one of the stabilizer and the metal ions have a strong
complexation unstable chlorine atom; the other is an organic anion of a
strong carbon (C? ?) initial significant complexing capacity, only two
were strong complexing ability of PVC was small. (Nearly colorless,
both strong and mercaptan, the tin mercaptide heat stabilizer for PVC,
PVC excellent in hue, hue holding time is longer).
3, the initial metal soap coloration WSD Chlorinated paraffin and long-term thermal stability of
organotin
3.1 is the beginning of soap coloring
I found an interesting phenomenon at work, the nature of Mg and Ca
soap soap is very similar (initial coloring serious, but a better long
-term thermal stability), and Al and Zn soap soap is very similar
(excellent initial hue and serious "zinc burn" phenomenon); Mg, Ca, Sr,
Ba are the second main group of the periodic elements are similar in
nature, well understood, but it is the third main element Al, and Zn,
Cd is the second sub-group elements, their chemical properties very
similar to what it? Of course, there are diagonal periodicity principle
can explain this phenomenon, but the similarities and differences
between the chemical properties of the elements, the fundamental reason
is the similarities and differences between their atomic structure, its
external representation is characteristic of the original rare earth
heat stabilizer is a unique " Coupling resistance. " Because of this
feature to make it appear to have in the processing of the lubricant
additives and processing characteristics, promote resin plasticizing;
show excellent impact resistance agent effectiveness in increasing the
PVC toughness, improve the mechanical properties of products in the
finished product; with When oxygen-fillers such as CaCO3 and other
effects, the performance of "Capacity" effect, without affecting the
mechanical properties of the conditions that can increase the amount of
CaCO3.
2014年1月14日星期二
Environmental plasticizer widely used physical and chemical methods
I produced the environmental plasticizers plasticity agent for the cold type environmental plasticizers, it has a high plasticizing effect, good compatibility with the product, no oil leakage, no overflow, non-volatile, and high brightness products, the product can replace the original plastic additives dibutyl, dioctyl, the price is much lower than similar products. It is widely used in PVC plastics, rubber, sealing WSD aluminium stearate strips, car tires, footwear, cables, plastic sheeting, granulation, waterproofing membrane, polyurethane waterproof coating, leather, plate, sheet, PVC hoses, shoe soles materials, rubber boots, etc., is an environmentally friendly green rubber industry plasticizer.
Plasticized rubber material that can be applied in some of the rubber, the rubber can make the interaction between the molecules is reduced, thereby reducing the glass transition temperature of the rubber, rubber-Sik plasticity, fluidity, easy rolling, extrusion molding, etc. operations, while also Some vulcanized rubber to improve mechanical properties such as hardness and reduced modulus, high elasticity and gives lower heat, cold, etc. improve.
The rubber can be plasticized by physical and chemical methods. Including chemical plasticizing the plasticized masticated masticated rubber processing technology are, at the time of plasticized synthetic rubber in the rubber through chemical reaction the introduction of the flexible molecular chain structure of the molecule can be increased to achieve the purpose of the plasticized . Not because of the chemical plasticized material from the plasticizing effect of volatile or precipitates lose its role plasticizing effect for a long time and therefore more attention. Physical plasticizing additional material refers to a method to achieve the purpose of plasticizing the purpose of said plasticized usually WSD Chrolinated polyethylene refers to the physical plasticized physical plasticizing substances known to soften the external environmental plasticizers.
Rubber softening environmental plasticizers usually divided according to their polarity and use softeners and environmentally friendly plasticizer. Derived from natural substances, called for a non-polar rubber softener; mainly used polar synthetic rubber or plastic WSD stearic acid material called environmentally friendly plasticizer. Currently the industry collectively environmental plasticizers.
Environmental plasticizer used in the production process should meet the following conditions: plasticizing effect, with less absorption speed, good compatibility with rubber, small volatility, do not migrate, cold is good, water, oil and solvent resistance, heat resistance, light resistance, electrical insulation, flame resistance and good resistance to bacteria, colorless, non-toxic, cheap and so on.
Plasticized rubber material that can be applied in some of the rubber, the rubber can make the interaction between the molecules is reduced, thereby reducing the glass transition temperature of the rubber, rubber-Sik plasticity, fluidity, easy rolling, extrusion molding, etc. operations, while also Some vulcanized rubber to improve mechanical properties such as hardness and reduced modulus, high elasticity and gives lower heat, cold, etc. improve.
The rubber can be plasticized by physical and chemical methods. Including chemical plasticizing the plasticized masticated masticated rubber processing technology are, at the time of plasticized synthetic rubber in the rubber through chemical reaction the introduction of the flexible molecular chain structure of the molecule can be increased to achieve the purpose of the plasticized . Not because of the chemical plasticized material from the plasticizing effect of volatile or precipitates lose its role plasticizing effect for a long time and therefore more attention. Physical plasticizing additional material refers to a method to achieve the purpose of plasticizing the purpose of said plasticized usually WSD Chrolinated polyethylene refers to the physical plasticized physical plasticizing substances known to soften the external environmental plasticizers.
Rubber softening environmental plasticizers usually divided according to their polarity and use softeners and environmentally friendly plasticizer. Derived from natural substances, called for a non-polar rubber softener; mainly used polar synthetic rubber or plastic WSD stearic acid material called environmentally friendly plasticizer. Currently the industry collectively environmental plasticizers.
Environmental plasticizer used in the production process should meet the following conditions: plasticizing effect, with less absorption speed, good compatibility with rubber, small volatility, do not migrate, cold is good, water, oil and solvent resistance, heat resistance, light resistance, electrical insulation, flame resistance and good resistance to bacteria, colorless, non-toxic, cheap and so on.
2014年1月5日星期日
Quotes optimistic about the domestic PVC stabilizer
Heat stabilizers for PVC processing mainly , it can reduce the degradation of PVC due to heat discoloration and light effects occur , effectively extending the life of the article . The PVC has high strength , corrosion resistance, fire retardant, insulation, transparency advantages, use very extensive. PVC products in the country has been a dominant species . In recent years, the amount of domestic production and processing of PVC resin significant growth for several years , with an average growth rate above 20 %. Soft PVC export-oriented products has been a greater impact , but not a big part of the proportion accounted for a large amount of consumption of PVC plastic pipe head , plastic profiles and wire and cable products is still very optimistic about the prospects for the . Particularly in order to cope with the adverse effects of the global financial crisis brought to China , the Chinese government plans to invest from the beginning of the end of last four trillion yuan , deploy and implement 10 measures to expand domestic demand . In the 10 measures to boost domestic demand , the major water conservancy projects will be extensive use of PVC pipe and film material ; in affordable housing projects , the construction of low-cost housing in shantytowns , nomadic population of plastic doors and windows are indispensable less ; in urban power grids , rail roads and airports and other major infrastructure construction, PVC wire and cable are basic materials, each laying a kilometer high-speed rail , you need a variety of cables up to 5 km; car industry, electronic information industry and light industry revitalization , will be more directly increase demand for various PVC products and spare parts . Huge investment in these projects , and many pre-project funds are already in place, is under construction. These favorable for heat stabilizer industry is real. Piece of cake in the heat stabilizer industry assigned to a small cup of soup as long as it has been very tempting.
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