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.

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.

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.

Features and applications oxidation, esterification, saponification of polyethylene wax powder

For the success of the polyethylene wax for aqueous paints and aqueous inks, often oxidized polyethylene wax, having a carboxyl group and a polar group to group. However, the oxidation process also makes polyethylene wax degradation, chain scission reduces the degree of crystallinity, its performance is dropping lower melting point, hardness decreased. This reduces the effect as a wax: anti-adhesion, smoothness, abrasion.
The oxidized polyethylene wax with two or more monovalent or divalent metal ion Mx, such as calcium, magnesium, aluminum, cerium, other appropriate cross-linking:
We want to get both hydrophilic and  Stabilizers for pipe smooth, abrasion resistance.
Dispersing method: deionized water, a surfactant, heated to boiling, to be emulsified into the wax powder, under strong stirring and then rapidly cooling to room temperature, adjusted with ammonia Ph value between 7-8. The wax dispersion can be easily dispersed in an aqueous ink, without precipitation, without float.
Saponification wax powder is also good to use as emulsifier effect of ammonium perfluorooctanoate and physical contact.
Two
Micronized wax aqueous dispersion for waterborne coatings, water-based inks, textile finishing, leather modifications and other fields.
Application of results:
1, extinction, antiblocking
Especially the oxidized polyethylene wax powder Mx saponified aqueous polyethylene wax dispersion for paints and inks have a significant effect extinction. 2-5% of the amount of film 60 ° gloss reduction of 20%. Smooth, anti-adhesion effect is obvious.
2, wear
Saponified polyethylene wax after partial crosslinking, molecular weight, crystallinity, improved hardness, lubricity both, but the end of the dynamic coefficient of friction coating to  zinc stearate reduce anti-friction capacity doubled.
3, feel
The coating soft touch, smooth and comfortable.
4, anti-aging and promote the solidification
Saponification wax coating can absorb calcium aging free radicals, from delaying the effects of aging coating.
Cerium has a variable coordination number  Azodicarbonamide and the remaining valence, because the 4f orbitals, located 6s, 5p, 5d inner orbit, its bonding capacity is weak, it is characterized by pro-dry agent of this nature in the cured coating from the promotion of cross-linking process and accelerate the curing effect.

PVC with a metal soap stabilizers which

Metal soap as a stabilizer , mainly for the plastics industry , particularly PVC use more. Stabilizers for PVC , mostly cadmium, barium, calcium, zinc , aluminum, magnesium salts of higher fatty Diethylene glycol dibenzoate  acids , especially stearic acid and lauric acid salts. They play the role of hydrogen chloride acceptor , a carboxyl group and a metal soap PVC replacement reaction of the chlorine atoms , the esterification of PVC stabilized. In most cases, the esterification reaction rate ZnCdPdCaBa. Because cadmium toxicity, have now banned . Zinc soap is best complementary stabilizer, but long-term stability is poor , the price cheaper , non-toxic , can be used in food packaging films . Common Ownership zinc stearate , zinc laurate , ... PVC heat stabilizers generally based on processing tribasic lead sulfate ( three salt ) , dibasic lead stearate ( two salt ) -based, then add  aluminum hydroxide a small amount of lead stearate ( hard lead ) and calcium stearate ( hard calcium ) , may be used alone , can be reasonable, made ​​of composite lead salt stabilizer. The toxicity of lead cause for great concern , three salt , two lead salt stabilizer higher indifferent people , and thus the metal soap -based heat stabilizer ( particularly a lead-free metal soap ) for people concerned , the thermal stability of the metal soap mechanism has become a hot topic. Because PVC heat stabilizers in the production aspect is protected by patents , so there is no reported its exact composition and potassium soap  content . Commercial heat stabilizers are commercially available mixture of various compounds . Mixture is better than pure substances stabilizing effect . Meanwhile , in dealing PVC heat stabilizers are required to carefully consider its toxicity. PVC, processors and consumers should pay attention to warnings about the toxicity of stabilizer .

Glycerol zinc and PVC heat stabilizer

Glycerin zinc can do as PVC heat stabilizers ?
Commonly used calcium and zinc heat stabilizer nontoxic, inexpensive, good lubrication , but poor thermal stability , and zinc soap often caused by products " zinc burning" , we must  antimony trioxide develop new and efficient Ca-Zn composite heat stabilizer. This cheap and easily obtained using glycerol and zinc oxide as raw materials , zinc complexes synthesized glycerol ( glycerine referred zinc ) , tested its heat stabilizers for PVC thermal stability , and the zinc complex of glycerol was studied . Using Congo red paper , thermal oven aging test method and the rheometer tests to compare zinc stearate , zinc complexes  titanium dioxide rutile of glycerol ( glycerine referred zinc ) as polyvinyl chloride (PVC heat stabilizers ) thermal stabilization studied , and the zinc complex of glycerol were studied ; also studied for PVC stabilizers of weatherability . The results show that zinc and calcium stearate of glycerol in the mass ratio of 1.0/l.5 has good synergy , glycerin , calcium zinc aim month and month more epoxidized soybean oil and vinegar, triphenyl phosphite mass ratio of 1.0 / l.5/0.2/0.2 is better synergies ; glycerol  black iron oxide zinc Deng studied more months aimed calcium compound heat stabilizer for PVC has good thermal stability , PVC and composite heat stabilizer mass ratio 100/0.9 when , PVC heat stabilizers Congo red test time up to 25, llirl, heat drying time aging test thermal stability up to 130: llin. In addition , the study found epoxidized soybean oil and triphenyl phosphite cool Shuo more months for zinc stearate , calcium compound heat stabilizer aims also has good synergy.

white killers FWA say NO

 White , consequent pure color and often gives a bright , pure , clean feeling, by the national people favor. However, in people's daily life everywhere , white goods, food products , has been hiding a mysterious white killer, listening, you would have some nervous ? Present, including silk, underwear, toilet paper , paper cups , mask , detergent, diapers , including plastic processing aid  many household items , and even flour, bread, mushrooms and other foods have been clear that the added toxic chemicals - optical brighteners, slowly eroded between the cumulative human health !
Optical brighteners, a fluorescent dye , with bright whiten and brighten the role , is widely used in papermaking, textile, detergent and other fields. However, it is not generally easy to break down the chemical composition , such as direct contact with the human body, the skin in the body after inhalation of excessive accumulation , it will generate a lot of harm . Toxicity of long-term accumulation in the liver or other vital organs , and even become a potential carcinogen . From Japan, a new study shows that women underwear with fluorescent brightener will be poured into the breast, a direct result of breast cancer.
In recent years , the world has some toxicity on fluorescent brighteners , field of application should be limited to the relevant debate intensified, in fact , including Japan , the European Union , including many developed countries have gradually enacted regulations that restrict the use of fluorescent brightener to IKEA of Sweden , represented by many well-known international companies have strict self-discipline , a wholly products explicitly not allowed to add fluorescent brighteners . Industry Dioctyl phthalate  experts Big Brand, founder of Wang Zhi Pu pointed out that China's relevant standards lagged behind Japan, Europe and other developed countries , the domestic enterprises are mostly ignored chemicals added security issues , leading to the killer's home carrying a white flood the market, and in unknowingly poisoned Chinese long-term health of consumers .
Understand the dangers of fluorescent brighteners , how to identify and shut out ? Puzzled for a large number of consumers , the reporter interviewed a large Pak brand founder , fluorescent brighteners detection does not require the help of professional bodies , just prepare a little money detector pen, direct exposure to the items to be detected , the irradiated area a dazzling light that adds harmful fluorescent brighteners, on the contrary , the irradiated region showed soft violet , then did not add harmful glyceryl monostearate  fluorescent brighteners . Zhi- chuen, said method by which a simple , consumers simply pay close attention, you can with a white killer everyday life to draw the line . Local independent design , production and sales of integrated household brand big Park , since its inception has always insisted that the design and manufacture of products should return to life 's most essential needs : safe, simple , comfortable and its launch of a full range of household products, including towels category , underwear , bedding , groceries hundred four categories of products, are manufactured using stringent corporate standards , does not contain formaldehyde, do not add any dangers with fluorescent whitening agents deal has overtaken Japan, like the world's most stringent textile product standards.

pvc heat stabilizers tribasic environmental pollution

The chemical synthesis of many of stabilizer on the environment are likely to cause environmental pollution , the tribasic pvc heat stabilizer is also the possibility of the existence of such . Now we are on pvc heat stabilizers tribasic whether to make an  titanium dioxide anatase environmental impact assessment of environmental pollution .
In general tribasic lead sulfate production process, waste mainly from lead dust and lead ions in wastewater, dust pollution comes mainly from feeding port , mill outlet , wastewater pollution from lead acetate containing a small amount of soluble waste .
H-1 of tribasic lead sulfate production process , including the non-toxic , inert filler dispersion inverted solution, then tio2 rutile  adding soluble lead salts , under the action of the polar molecules to coat the inert filler , solid-liquid separation and drying packaging derived products. This technology and traditional production of three salt , a decrease from the pulverizing step , one of which is important to reduce contamination. H-1 reproduction in three salt water , but the reaction with the conventional production of three different salts , lead acetate without formation of carbonate ions  low molecular polyethylene in water , with water can be combined to generate Pb + ions lead carbonate precipitate. Because of lead carbonate solubility product of only 5 * 10-13 . Solubility is very small , so the low levels of lead in water , the water treatment plant to generate funding for heavy metal wastewater treatment water treatment plant , emission concentrations up to 0.8mg / L below .

fluorescent, transparent dyes

Transparent fluorescent dye chromatography complete series, bright color bright, strong coloring, light resistance excellent heat resistance, and according to the needs of a variety of Acrylic impact modifier  products, you want to get a variety of colors to make your product more beautiful and colorful.
Transparent series fluorescent dye can be widely applied to various plastics (such as PS / AS / ABS / PMMA / PA / PC / PET / PBT / RPVC), and decorative materials, inks, plastics, masterbatch coloring, but also for polyester, polypropylene, polyvinyl chloride, etc. puree coloring. Fluorescent dye is insoluble in water, soluble only in organic solvents, so the application process, you must deal with each case iron oxide red  in advance of its dyeing effect experiment meets the requirements of production technology.
 Fluorescent dyes used in the PP / PE colorants dose should not exceed 0.02%.
 

organic pigments

Organic pigments are PVC stabilizer for cable  insoluble organic matter, refers to a series of paint colors and other characteristics, a class made up of organic pigments. Usually highly dispersed coloring substrate was added. All coloring pigment heap objects have no affinity, mainly by resins, adhesives, and other film-forming material and coloring objects together. / Pigment insoluble in the course of use of the medium, the original crystalline state always exists, therefore, the color of the pigment itself it represents the color on the substrate. Pigments features include Fast, resistance to flooding, acid and alkali resistance, organic solvents, heat, crystal stability, dispersion and hiding power. Organic pigments and  methyl tin stabilizer inorganic pigments generally compared to typically have high tinting strength, easy to grind and disperse particles, not precipitation, colors are more vivid, but the Light, heat, weather and poor performance. Organic pigments commonly used in inks, paints, rubber products, plastic products, stationery and supplies and other materials coloring.

China's plastics processing aids Market Analysis and Forecast

 Is a kind of plastic processing aids to improve processability and

performance plastics additives, has formed, including plasticizers, flame

retardants, heat stabilizers, antistatic agents, light stabilizers,

antioxidants, impact-modified agents, processing lubricants, coloring

agents, and many varieties of large-scale fine PVC lubricant  chemical industries.

Currently, the global annual consumption of plastics processing aids

synthetic resin production accounts for 10% of total reached 11 million

tons. Of China's plastics processing chemicals industry since the 1950s

started, has been developed to a considerable scale, as China's

petrochemical industry and the rapid development of the plastics processing

industry is expected to 2010 will be more progress, development prospects

are quite broad.

A private plasticizer plasticizer present the whole annual production

capacity has reached 5,000,000 t, there are more than 500 varieties.

China's current total annual production capacity of plasticizers have more

than 700,000 t, a hundred manufacturers, the main varieties are phthalates,

which dioctyl phthalate and dibutyl phthalate as Lord. In addition,

terephthalic acid esters, chlorinated paraffins, alkyl sulfonic acid

esters, aliphatic dibasic acid esters, epoxy esters, phosphate esters,

nearly a hundred species, the  calcium zinc stabilizer common varieties of 20 kinds to 30 kind.

Projected to 2001, China's demand for PVC products for the 2.6 million t,

where hard products is 130 million t, the demand for plasticizers is

600,000 t ~ 65 million t. Plasticizer production capacity to meet existing

needs, but it should be the adjustment of product structure, the

development has a special function or multifunction new varieties,

renovation and expansion of economies of scale devices (annual output of

50,000 tons or more), trustworthy improve product quality, comprehensive

meet market demand. By 2010, China's plastics processing industry

plasticizer total demand will reach 810,000 t.

2 heat stabilizers heat stabilizers currently the world's annual

consumption of 300,000 t, of which the main varieties are lead salts, metal

soaps, organic tin, liquid or solid  foaming agent composite heat stabilizer. Heat

stabilizers of total annual production capacity of 40,000 t or more, about

70 manufacturers, varieties 40 ~ 50. Main varieties of lead salts (Dibasic

lead phosphate, tribasic lead sulphate, lead stearate), metal soaps

(calcium stearate, zinc, cadmium, magnesium, etc.). Organic tin (tin ester,

alkyl tin). The solid compound (liquid) heat stabilizer. One of its

development trends are: lead salt heat stabilizer is still a strong market,

but to promote clean composite lead salts; food and medical use of non-

toxic plastic heat stabilizer, organic tin and a variety of non-dust

pollution composite heat stabilizer market demand will have a larger

growth; human toxic heavy metal heat stabilizers will be restricted.

Three countries in the world with flame retardant regulations have been

promulgated, flame retardants developed very rapidly. Flame retardants in

our country also attaches great importance to the development and

production, more than 50 professional production plant, producing nearly a

hundred varieties, commonly about 30 species, the total production capacity

of 106,000 tons. Among them, chlorinated paraffin 75 000 t, phosphorus-

based halogenated phosphate esters 11,000 t, brominated flame retardants

11,000 t, inorganic flame retardants 06,000 t, the other about 03 million

t. With the amount of plastic and chemical building materials continues to

increase, the country will be an increasing demand for flame retardants, in

1999 the country's total demand for flame retardants has reached 100,000 t,

can be expected to grow in 2001 to 110,000 t ~ 12 万 t, 2010 年 will reach

200,000 t.

4 Antioxidant Antioxidant foreign market development trend stationary, the

main species divided by raw material composition of phenols (both 100

kinds), phosphorus (about 100 kinds), sulfur and amine (about 150 kinds)

and composite antioxidant. In order to meet the growing domestic market

demand for antioxidants, some places will be built kiloton production unit,

will add a total production capacity of 5000t or so.

5 light stabilizer present in the light stabilizer consumption of more than

10,000 t, the main varieties are hindered amines, benzotriazole,

benzophenone and nickel chelates, which hindered amine light stabilizers

annual output of nearly 5000t. China's existing light stabilizer production

plant over 40 varieties of about 8 ~ 9, the main varieties are salicylic

acid esters, benzophenone, benzotriazole, production falls, spending every

year a lot of foreign exchange to import various species 200t. With the

development of the plastics industry, China's light stabilizer demand will

continue to increase in 1999 market consumption is about 2700t, is expected

in 2001 will reach about 3300t, 6000t to 2010 will reach about market

prospects will be very promising.

6 impact modifiers and processing modifiers as chemical building material

industry, hard Yunnan PVC products need to add weathering strong impact

modifier. At present, China's impact modifier total annual production

capacity of 30,000 t, the main varieties of CPE (chlorinated polyethylene)

accounted for 80% or more, as well as a small amount of MBS and other

products. "Ninth Five-Year" period, in order to meet the domestic PVC hard

products processing demands against rushing modifiers have been approved or

are in the construction of various impact modifier devices. "Ninth Five"

end of the country against the punch modifier total demand of about 55,000

t ~ 6.0 million t. Estimated 2001 national confrontation punch modifier

(including processing of improved ACR) total demand will reach 65,000 t ~

7.0 million t. 2010, will reach 136,000 t. Future should develop excellent

performance ACR, MBS local development in the conditional and EVA, PVC hard

products to meet the growing needs of Canadian industry.

7 colorants use of modern plastics processing masterbatch (by the pigment,

carrier resin and additives) coloring process. At present there are about

masterbatch manufacturer with more than 70, of which only 20 kiloton plant

more than in 1999, the production capacity of about 40,000 t / a. China's

plastics processing industry for masterbatch demand will continue to grow

in 1995 and 40,000 t, 2000 year 60 000 t, to 2001 will increase to 64 000

t, 2010 年 will increase to 100,000 t. The future should be the main

development of high concentration, high concentration and multifunctional

masterbatch or special features in order to impart a variety of plastic

products, more vivid colors.

8 lubricant lubricant consumption in plastics processing large annual

consumption of more than 20 million foreign t, where U.S. sales of 100,000

t, China has imported large quantities of plastic processing equipment, and

its rigid PVC resin processing capacity 500 000 t ~ 60 million t, at 0.5%

to 1% of the added amount of calculation, need a variety of lip drops

05,000 t or more. With plastic pipes, doors, windows, profiles the

development of production, the growing demand for lubricants, the total

demand in 1995 will be increased to 05,000 t in 2001 to 26,600 t, is

expected to 2010 will be increased 62,000 t. The future should focus

primarily on developing high-speed high-temperature processing of complex

lubricant, and its products should be fine, multi-functional, no dust

pollution, low toxicity characteristics.
In summary, with China's accession to WTO and the rapid development of the

plastics industry, plastics processing chemicals industry prospects. As

long as domestic and external demand as the basis, focus on changing the

structure of varieties, the development of efficient, versatile, complex,

or a special performance dedicated auxiliaries, develop no dust pollution,

toxic and non-toxic processing aids, the use of more advanced production

process, will be able to China's plastics processing aids development of

the industry on a solid basis in the domestic and international market

competition in an invincible position.

toxic PVC heat stabilizers Research Status and Development Trend

Polyethylene, polyvinyl chloride PVC is second only to the world's second-largest synthetic resin production over 90,000, however, PVC there are some difficult to overcome the shortcomings of poor thermal stability which was most prominent. PVC due to poor thermal stability, softening temperature and decomposition temperature difference is small, has caused great difficulties to the process, so the machining process must be a  flame retardant certain amount of heat stabilizer in order to improve its thermal stability. Currently, the largest amount of lead salt heat stabilizer. In building a harmonious society and to ensure sustainable development in mind, people's awareness of environmental protection and health gradually strengthened, therefore, low toxicity, no pollution, has become a complex and efficient PVC heat stabilizers direction of development.
Analysis of the thermal stability tribasic lead sulphate  of PVC resin
PVC imminent completion of the laboratory synthesis, is one of the earliest synthetic thermoplastics, with difficult to burn, good mechanical properties, low prices, abundant source of raw materials, synthetic process maturity and other characteristics, widely used in construction, telecommunications, transportation, electronics, chemicals, packaging and other industries. PVC heat stabilizer to heat or high-energy radiation, such as ultraviolet light "effect occurs under the autocatalytic reaction hcl off, the PVC foaming board stabilizer  thermal decomposition mechanism generally believed that there are three kinds. Oxygen environment of the free radical mechanism; (2) ion mechanism under a nitrogen atmosphere; (3) of the single vacuum molecular mechanisms that affect the thermal decomposition pvc chain structure is the main factor, means branched, double, allyl chloride, head structure of conjugated double bonds and a molecular weight etc. "effect; addition, oxygen, HCL additives and other external factors also have an impact.

Plastic additives and type of Performance

Plastics compounding, a small amount added to the synthetic resins or compounds, in order to improve the molding process or the performance of a given product of a class of chemical substances. Such materials dispersed in a mixture of synthetic resin or with, does not affect the molecular structure of the synthetic resin.
Performance
The main requirements of the plastic additive are:
Efficient: applications in plastics processing and can effectively play its proper function. Selection should be based on the additive mixing with the comprehensive performance requirements.
Compatibility: synthetic resin with better compatibility.
Persistence: in the plastic processing and application process is not volatile, non-bleeding and non-migratory and non-leaching.
Chemical stability: in plastics processing and the application process is not biodegradable, synthetic resins and other components with chemical reactions.
Non-toxic: no toxic effects on the human body.
Low prices.
Type
Plastic additives according to their specific function can be divided into seven categories: ① improve the processing performance additives such as heat stabilizers, lubricants, etc.. ② improve machining performance additives, such as plasticizers, toughening agents, etc. ③ additives improve the surface properties, such as an antistatic agent,

Coupling agent. ④ improve optical performance additives such as coloring agents. ⑤ improve the aging properties of additives, such as antioxidants, light stabilizers. ⑥ reduce the cost of plastic additives, such as extenders, fillers and the like. ⑦ pvc additive impart other specific effects, such as

Blowing agents, flame retardants, fungicides and so on.

Plastic additives requirements

The main requirements of the plastic additive are:
① Efficient: applications in plastics processing and can effectively play its proper function. Selection should be based on the additive mixing with the comprehensive performance requirements.
② Compatibility: synthetic resin with better compatibility.
③ Persistence: in the plastic processing and application process is not volatile, non-bleeding and non-migratory and non-leaching.
④ Chemical stability: in the plastic processing and application process does not decompose with the synthetic resin and other components of the chemical reaction.
⑤ Non-toxic: no toxic effects on the human body.
⑥ low prices. Add a way to add an additive depends on: the physical form of synthetic resin and melt characteristics; pvc additive physical form and concentration; additive compounds, the dispersion and solubility; compounds, the ultimate physical condition. Add o'clock

High-speed mixing, mixing and extrusion processes. The effect additives may be added, in addition to depending on their mechanism of action, but also depends on the correct order of addition.

Physical and chemical properties of plastic additives

plastic additive increase the substrate from the physical and chemical characteristics are analyzed:
Additives include: ① rigidity, strength: fillers, nucleating agents; ② impact: the impact modifier; ③ Heat resistance: fillers, nucleating agents; ④ Flammability: flame retardants; ⑤ Weather resistance: UV stabilizer stabilizer; ⑥ Conductivity: antistatic agents conductive coating filler;

⑦ Color: pigment; ⑧ Flex: plasticizers processing oil; ⑨ density: foaming agent ; ⑩ Transparency: nucleating agents, sexual health: antibacterial agent.
Antioxidant additives are unsaturated double bonds in the plastic by an oxygen atom, the invasion of heat and light, free radicals cause fracture, thereby causing a chain reaction, the molecular chains or the formation of the crosslink, resulting in the strength of plastic products decrease or become brittle. Antioxidants

The feature is that the delay due to oxidation and decomposition of the plastic, extending the life of plastic products.

Colorants plastics additives

plastic additive colorants effects: the use plastic parts to meet aesthetic requirements,

and special color to give the plastic optical properties, and sometimes also to improve the

weather resistance of plastics, often adding a coloring agent.
Type:
1 to give the plastic color toner: organic pigments , inorganic pigments and dyes as

colorants.
(2) to give special optical properties of the plastic optical flakes are: (aluminum,

copper, copper alloys, etc.) ① pearlescent pigment: the plastic was pearlescent; ②

phosphorescent pigment: After exposure to light, the light in the dark; ③ fluorescent

pigment: can emit and absorb different wavelengths

Light, thus forming a glow flashing, but not in the dark light. Colorants should have

performance: they should have strong coloring, bright color, good dispersion

characteristics, not with other components from a chemical change, and with heat, light and

other properties. Colorant

An amount of usually 0.01% to 0.02% of plastic.
The method of adding pigment plastics:
1 using an extrusion granulator, mixing after extrusion - cut granulation, mixing a good

resin material has been used for mass production of the same color product.
2 with color masterbatch added to the resin and mix well, if plastics injection molding

machine; used for small-volume, multi-variety production. Disadvantages are: mixing is not

uniform, different batches of the product there is color.
3. The powdered dye added to the resin color, mixed, if the injection machine plasticizing;

used for small-volume, multi-variety production.
Disadvantages are: mixing is not uniform, different batches of the product there is color.
Current injection has been widely used plastics coloring masterbatch for coloring, long

before the injection molding, in the qualities of plastic particles in a proportion of

concentrated masterbatch mix (the masterbatch) can be. Masterbatch is a colorant, a

dispersant, the carrier and other components by

Specific pre-dispersion granulation process and prepared. A high content of the colorant to

be colored particulate plastic material and is easy to uniform mixing between the

particles, mixing does not produce dust, good working conditions, and because of the

masterbatch containing dispersant additives, coloring agents

Easily dispersed to be colored plastics, injection molding before having to go through an

extruder melt mixing granulation process, coloring effects, coloring costs are also lower,

is a worthy application coloring process.