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.

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 .

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.

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.

Our industry is facing a major problem of calcium stearate

 The main problem facing the industry of calcium stearate is irrational allocation of resources. Domestic producers can be divided into three kinds of production types: one has its own raw material resources, and second, there is a downstream product support, three are two in appearance (no upstream raw materials, no downstream product). Currently the first three types of calcium stearate companies have not considered how profitable, but only in the defenses of the losses do everything possible to maintain survival.
 Followed by the consumption ratio is irrational. Consumption of calcium stearate From a global perspective, unsaturated  Chrolinated polyethylene polyester resins are generally 45% to 50%. In China, the proportion of consumption of calcium stearate in the field in 2003 was as high as 72%. This shows that the scope of application of calcium stearate small and simple. Thus, calcium stearate domestic industry's market risk is relatively increased.
The role of calcium stearate and calcium stearate characteristic is often used as a heat stabilizer and a variety of plastics processing PVC lubricants, mold release agents. In rigid products, and the base of lead salts, lead soap can increase the rate of gelation. Also used in food packaging, medical equipment and other requirements of non-toxic soft film and equipment. Calcium stearate can be made of polyethylene, polypropylene, halogen absorbers to eliminate the adverse effects of residual catalyst on the color and stability. As plasticizers in rubber processing, enabling  stearic acid natural rubber and synthetic rubber to soften the whole, and almost no effect on curing. Also used as polyolefin fibers and molded plastic lubricants, grease thickening agent, textile waterproofing agent, paint flatting agent, plasticizer manufacturing plastic labels and so on.
 Zinc stearate Uses: mainly used styrene resin, phenolic resin, amino resin, lubricant and release agent. While also having a rubber vulcanizing agent, softening function. Can be used as  non-toxic PVC heat stabilizers, coloring and suppress initial lubrication, and no curing pollution, but limited thermal stability, the formation of zinc chloride with  PVC flame retardant catalytic degradation of PVC, is generally not used alone, more than with calcium soap, barium soap stabilizers used in conjunction with, mainly for soft products.

Fireproof cement foam insulation board dedicated calcium stearate successful development

Cement foam board dedicated calcium stearate , also known as the cement foam insulation board dedicated calcium stearate , fireproof cement foam insulation board dedicated calcium stearate , A grade cement foam insulation board dedicated calcium stearate ( hereinafter referred to as calcium stearate ) , the manufacturers of him not the same name , but the play was really a role in the fire cement foam insulation board production roughly
Calcium stearate is mainly used in cement  tribasic lead sulfate foam insulation board made ​​fireproof foam stabilizer , curing agent, water repellent ( hydrophobic agent ) . Currently the manufacturers for the production of cement foam insulation board fire recipe varies. Useful sulfur aluminate cement , ordinary Portland cement are also useful for different cement per cubic meter of production of fire insulation board quality and amount of calcium stearate is not like.
Foam stabilizer : calcium stearate effectively prevent fire insulation board was up too high and the lack of material and keep the aperture fine, uniform cell size did not make cement foam PVC stabilizer for wire  insulation board does not collapse in the foam, foam completed after the semi-finished table no holes or cracks.
Curing agent: calcium stearate itself there are a lot of calcium , which can effectively increase the intensity of fire insulation board firmly to prevent fire insulation panels fold out powder , produced by calcium stearate fire insulation board with calcium ions in the late the chemical reaction will be more firm , more rugged .
Waterproofing agent : calcium stearate produced by the fire insulation board materials, basically when water does not absorb moisture during transport can reduce transportation costs, saving manpower and material resources in the installation phase.
According to tests, produced by calcium stearate fire insulation board than simply initiator and other small fireproof  one pack stabilizer insulation board materials produced with stearic acid or AC, both in appearance , strength, water resistance is much better, stearic calcium can significantly improve product quality, enhance the corporate brand .

What is the trend stabilizer

Types and tend to be stable and stabilizing agent for a wide variety of different combinations , in order to better understand its performance and features , must be classified . In several existing classification methods, the most obvious is to be classified according to their chemical composition , followed by its thermal stability, light stability , electrical properties and a hard or soft transparent or opaque article , toxic or non-toxic , and so on various occasions classification. Now titanium dioxide rutile  the main types of stabilizers are as follows : 1 , lead-based stabilizers lead-based stabilizers due to low prices , good stabilizing effect , and therefore is the most widely used stabilizer , which is characterized by : ① electric superior performance, a large number of used in manufacturing insulation products ; ② HCI reaction due to the formation and stability , suitable for the manufacture of transparent articles ; ③ small water absorption, suitable for use in humid environments , because it is toxic and therefore not suitable for low or non-toxic products, In addition, it has the effect of sulfide contamination . Lead stabilizers are the following: ( 1 ) tribasic lead sulfate (3PbO · PbSO4 · H2O): is the maximum amount of use of a stabilizer , for HCl absorption force, shading good , so resistance weather is good, the most suitable for soft and hard in the extrusion process also applies to products with high electrical performance requirements . ( 2 ) Dibasic lead phosphite (2PbO · PbHPO3 · 1/2H2O): It is slightly lower than the absorption of HCl tribasic lead sulfate , but it is heat-resistant , good anti- light performance, UV light has shielding effect, and has antioxidant properties , are particularly useful in the paste PVC , but more than 300 ° C, the article is easy to produce bubbles, it is not appropriate for the processing of high temperature applications. It is used with the appropriate lubricant and good initial stability . ( 3 ) white lead [ Dibasic lead carbonate , 2PbCO3 · Pb (OH) 2]: It is also well- HCl absorber , various properties are good mainly for general soft rolled products , the cable sheath , but not suitable for use in high temperature or longer processing times of the occasion, because the gas leaving it prone to foaming products . ( 4 ) Dibasic acid Lead: good heat resistance , suitable for heat-resistant products , but because  black iron oxide it has the acid group, therefore when used phthalate ester plasticizers , good compatibility , light stability is also good , currently mostly used in high-temperature products . Further, in the production of PVC foam products with the azo dimethylamine , good foamability . ( 5 ) Dibasic Lead Stearate : such stabilizers will not melt at normal operating temperatures , good lubricity , it is generally not as easy to bloom soaps , generally regular and tribasic lead sulfate or dibasic lead phosphite and use, its heat resistance, electrical insulation is good, dibasic lead stearate and lead stearate and use, when appropriate proportion of time to get closer to transparent products. ( 6 ) lead stearate : good thermal stability , the ability to inhibit the initial color , widely used in extrusion, calendering and molded articles . It has good lubricating properties, but plasticizing poor performance, thus limiting its use proportion ( generally the amount of 0.5 to 1.0 parts ) in the recipe . ( 7 ) co-precipitated silica lead silicate : This stabilizer at high temperatures and for a long time , have a good  organic pigments thermal stability , light stability , can be used for spare parts or heat-resistant transparent cable . Its disadvantage is hygroscopic and poor dispersion , care must be taken when using . ( 8 ) tribasic lead maleate : This is a very good heat and light stabilizers , ultraviolet shielding properties, can also get translucent products. The use of chlorine or chlorinated polyvinyl chloride plasticizer occasions , adding tribasic lead maleate , you have better stability.

retention aid relationship with aluminum sulfate

Aluminum sulfate manufacturers have reported , aluminum sulfate is paper sizing agent is soil conditioning neutralizer , flocculation and sewage treatment flocculants . The retention aid is used to improve the wire section of paper fibers and fines retention of the Metal stearate  chemical. Then they existed before what kind of relationship do ?
Common retention aids
 Retention aids are commonly modified starch and synthetic resins, retention agents generally also have to accelerate the slurry treatment filter aid performance. There are two main types . ( 1 ) modified starch . From corn , potato , tapioca wet , dry process obtained anion and cation -modified starch. Mainly quaternary ammonium and methyl tin stabilizer  amine -modified cationic starch . ( 2 ) polyacrylamide . Are generally anionic or cationic modified type of product . Anionic polyacrylamide by partial hydrolysis reaction or sulfomethylation reaction. Or by acrylic acid cis -butadiene copolymer derived. Cationic Hoffman is through Mannich reaction or reaction. Also with aminoalkyl methacrylate copolymer obtained .
Aluminum sulfate retention aid
Generally, there are inorganic retention agents such as aluminum sulfate , sodium aluminate ( retention effect chrome oxide  is not significant ) ; cationic starch ; carboxymethyl cellulose ; synthetic resins ( e.g., polyethylene imine , polyacrylamide , polyethylene oxide , polyamides , etc. ) .
  That aluminum sulfate with the fiber retention effect , which means it is a retention aid . This is similar to its role in wastewater treatment . However, its retention effect as polyaluminum chloride and polyacrylamide .

processing aids in the characteristics of different processing methods

Processing aids action principle : PVC melt poor scalability , easily lead to melt broken ; PVC melt relaxation is slow, easily lead to the product surface rough, dull and shark skin and  titanium dioxide anatase so on. Therefore , PVC processing often necessary to add processing aids to improve the melt of the above-mentioned drawbacks . Processing aids as a class can improve the performance of resin processing aids, which consists of three main modes of action : promoting resin melt , the melt rheology modifiers and gives lubrication. 1 PVC resin promoting resin is melted when heated under shear force , processing modifier first melted and adhered to the surface of the PVC resin particles , based on their compatibility with the magnesium hydroxide flame retardant  resin and the molecular weight, the viscosity of PVC and friction increases, thereby effectively the shear stress and heat transfer to the PVC resin, PVC accelerate melting . (2) has a melt rheology modified PVC melt strength is poor, poor scalability and melt fracture and other shortcomings, while processing modifier can improve the melt above problems. Its mechanism of action is: to increase the melt viscoelasticity of PVC , thereby improving the die swell and increased melt strength. 3 gives lubricity compatibility with PVC processing modifier part first melting molten play a catalytic role ; partly incompatible with PVC molten resin to migrate outside the system , thereby improving mold release . ACR processing aids commonly used species category , ACR is methyl methacrylate . PVC can be  plastic additive added to improve the melt strength and melt elongation . ACR-201 is mainly used for rigid PVC profiles , pipes, bottles and sheets, the amount of 0.5 to 2 parts . ACR-401, methyl methacrylate , ethyl acrylate , butyl acrylate and styrene monomer from four kinds , are core - shell copolymers , AMS class , AMS -based oligomeric α- methyl styrene material , which is also called hexamer M-80, it is non-toxic and transparency , and can improve the processability of PVC resistance and luster of products . AMS for rigid PVC , the hard tube add 2 to 5 parts , 3 parts of a transparent film , was added 10 parts of the floor . Copolymers of butadiene and acrylonitrile P83 , the surface treatment by the PVC latex , can be used as processing aids, added in an amount up to about 20 parts . 820-G is a chlorinated paraffin and polypropylene oxide - ethylene made ​​by free radical grafting , which can improve the processability of PVC , gloss and feel, added in an amount up to 5 to 10 parts .

Titanium dioxide rutile titanium dioxide with the use of

Titanium dioxide ( titania ) chemically stable in general not react with most materials . In nature , there are three crystalline titanium dioxide : titanium plate , titanium dioxide anatase and rutile titanium dioxide . Titanium plate crystal form is unstable , no industrial use value, anatase titanium dioxide (Anatase) referred to as A -type , and plastic additive  rutile titanium dioxide (Rutile) referred to as R-type , have a stable crystal lattice , it is important white pigments and porcelain glaze , compared with other white pigments have superior whiteness, color strength, hiding power, weatherability, heat resistance , and chemical stability, especially not toxic.
Coatings industry is the largest user of titanium dioxide , especially rutile titanium dioxide , mostly consumed by the paint industry . Manufactured with titanium dioxide paint , colorful, high hiding power , tinting strength , dosage province , variety, stability of the media can play a protective role , and can enhance the mechanical strength and adhesion of the film to prevent cracks, prevent UV and moisture through , extend film life.
Plastics industry is the second largest user of titanium dioxide added in plastics , plastic products can improve the heat resistance , light resistance , weather resistance, the physical  Metallic stearate and chemical properties of plastic products to improve and enhance products, mechanical strength, prolong life.
The paper industry is the third  Zinc stearate largest user of titanium dioxide as filler paper , mainly used in fine paper and the paper thin . In the paper by adding titanium dioxide , can make the paper has good whiteness, gloss , high strength , thin and smooth , printing does not penetrate , quality of light. Papermaking general use without a surface treatment of titanium dioxide anatase titanium dioxide, can play the role of optical brighteners , increasing whiteness of the paper . But requires the use of laminated paper surface treated rutile type titanium dioxide , in order to meet light and heat requirements. Or advanced ink titanium white pigment is indispensable . Durable ink containing titanium dioxide does not change color , surface wettability , easy to disperse . Ink industry has used titanium dioxide rutile , anatase have . Textile and chemical fiber industry is another important application of titanium dioxide . Chemical fiber titanium dioxide is mainly used as a matting agent . Since anatase type soft than gold, red , general use anatase . Fiber surface with titanium dioxide generally do not need treatment, but some special varieties in order to reduce photochemical effect of titanium dioxide , titanium dioxide to avoid fibers degrade the photocatalytic effect , the need for surface treatment.

introduces some major stearate

Stearate is an additive for a wide range , the most important role of the polymer with very good results. Such as polyolefins can be used as an acid neutralizer , the article has a good lubricating effect , increase  heat stabilizer for panel life expectancy ( in terms of the thermoset product ) . Market , stearate great demand, generally focused on: calcium stearate, zinc stearate, sodium stearate these types . Lianyungang Huaming Tai Material Technology Co., Ltd. is mainly engaged in three types of stearate.
Production of stearic acid salt is a complex process, after several in-depth exchanges , flash dryer as stearate final process section . More than two years , the use of easy -degree flash dryer for n-butyl stearate  drying stearate effect is remarkable, not only high production efficiency, and fewer human resources needed , greatly reducing the cost of doing business .
 Drying stearate ( calcium stearate, zinc stearate, sodium stearate ), the main difficulty lies in mesh powder is too low, the drying time is not a good collection of dust than expected . Choose the traditional bag dust removal equipment can not solve this problem. Our response to this situation , the traditional baghouse has been improved, under the  heat stabilizer for pipe premise of ensuring the production , making the maximum amount of material was collected . Stearate using flash dryer drying , the effect is remarkable, and , again using the flash drying equipment high production requirements under full load operation. Tailored for the enterprise is the most suitable drying equipment drying machine I designed purpose . Communicate constantly , constantly solving puzzles , and constantly break through the self .

PVC stabilizer master some role in some of the major

PVC primary stabilizers are those have a stabilizing effect when used alone, the compound and the secondary stabilizer is an invalid who used alone with the primary stabilizer compounds Shique synergistic effect . Some primary stabilizer or between certain to choose between the PVC stabilizer for cable  main and auxiliary stabilizers act synergistically after use . First, the base of the lead salt base lead salts are used in PVC earliest and most widely used of a heat stabilizer , alkaline , and it could be heated with PVC, HCl produced REACTED stability. From toxicity, stain resistance and product transparency point of view, lead salt is not ideal. But its stabilizing effect is good, inexpensive, it is still used extensively for cheap PVC extrusion and calendered products . Because it has excellent electrical properties and low water absorption, the PVC is widely used as electrical insulation products , albums and foam stabilizers. 1.1 , tribasic lead sulfate ( also known as tribasic lead sulfate ) white powder , specific gravity 7.10 , sweet , toxic ; hygroscopic , non- flammable and corrosive . Insoluble in water, but soluble in hot ammonium acetate , wet decomposition of the light will change color . Index 2.1 , and used as electrical insulation products stabilizer. 1.2 Dibasic lead phosphate which is a fine needle-like crystalline powder ; specific gravity 6.1 , sweet and toxic ; 200 ℃ or so into a gray-black , 450 ℃ or so turns yellow . This product is not soluble in water and organic solvents , soluble in hydrochloric acid. Refractive index 2.25 , with an antioxidant effect, is an excellent weather resistance stabilizers. Second, the metal soaps metal soaps also a widely used class of PVC heat stabilizer. In carboxylic acid barium, cadmium carboxylate , zinc carboxylate , carboxylic acid , or a mixture of elemental calcium use . Its stabilizing effect is due to it in the beginning of PVC molecular chain decomposition of the place where esterification . Stabilizing effect and the strength of the metal ratio of metal soap , a carboxylic acid type, and the existence of such formulations phosphite , epoxidized oils , the antioxidant synergists . Including cadmium and zinc soap soap greatest stabilizing effect . 2.1 Lead stearate which is a fine powder , is insoluble in water , soluble in hot ethanol and ether. Heated and dissolved in an organic solvent , and then cooling a gum. Case of decomposition of stearic acid and the corresponding lead salts , easy to damp . Has good lubricity , low  Plastic impact modifier melting point and that it has the excellent dispersibility. 2.2,2 - ethyl acetate, lead is soluble solvents and plasticizers. Often dubbed 57-60 % mineral oil or plasticizer was sold. Widely used in foam blowing agent azodicarbonamide activator. 2.3 Lead salicylate which is a white crystalline powder, specific gravity 2.36 , refractive index 1.76 . Both PVC heat stabilizers and light stabilizers . 2.4 , tribasic lead stearate is a white powder , specific gravity 2.15,280-300 ℃ decomposition , the case of high temperature above 100 ℃ caking . Soluble in ether, poisonous , non- flammable and corrosive . Refractive index of 1.60 . This product is good lubricity , good light stability , widely used in PVC formulations title . 2.5 , dibasic lead phthalate white fine crystalline powder , specific gravity 4.5. Insoluble in common solvents. This product is weak , and its base portion and easy carbonation . Refractive index of 1.99. When a formula contains a plasticizer easily saponifiable stabilizing effect than tribasic lead sulfate . 2.6 , three maleate salt of lead ( tribasic lead maleate ) yellowish fine powder , specific gravity 6.0 , refractive index 2.08 , toxic , non- flammable and corrosive , with good color stability , and eliminate unstable diene structure effect. 2.7 , barium stearate fine white powder , barium content 19.5-20.6 % , the proportion of 1.145 , melting point 225 ℃ or more. Insoluble in water, but soluble in hot ethanol . Was heated and dissolved in an organic solvent , after cooling into jelly . Case of decomposition of stearic acid and the corresponding barium salt , easy to damp . Sulfur contamination must be avoided for the selection of the heat stabilizer is used when processed under high temperature lubricant. 2.8 , Osmanthus barium
2.9 , ricinoleic acid, which is a kind of barium yellow-white powder , mp l16-124 ℃, enabling products to obtain good transparency stabilizer. 2.10 , a white fine powder cadmium stearate , cadmium content 16.5-17.5 % , insoluble in water , soluble in hot ethanol , heated and dissolved in an organic solvent, a jelly after cooling , in case decomposed into stearic acid and the corresponding cadmium salt, easy to damp . Is required to have good transparency PVC heat and light stabilizers . 2.11 , cadmium ricinoleate which is a white powder, mp 96-104 ℃, both heat and light stabilizers 2.12 , calcium stearate fine white powder , insoluble in water , soluble in hot ethanol and ether. Case of decomposition of stearic acid and corresponding calcium salt , easy to damp . Is a non-toxic PVC stabilizers and lubricants . Generally not used alone , but often with soap zinc , magnesium soap or vice epoxy stabilizer used in conjunction. 2.13 , castor calcium is a white powder, melting point 74-82 ℃, PVC with a non-toxic stabilizers. 2.14 , zinc stearate fine white powder , insoluble in water , soluble in hot ethanol , turpentine , benzene and other organic solvents. Was heated and dissolved in an organic solvent, after cooling a gum. Case of decomposition of stearic acid and the  lead stearate corresponding zinc , easy to damp . Is a non-toxic PVC stabilizers and lubricants. 2.15 , magnesium stearate white powder , specific gravity 1.07 , melting point of pure 85 ℃, industrial mp l08-115 ℃. Slightly soluble in water , soluble in hot ethanol , the case of decomposition of stearic acid and magnesium . This is a non-toxic PVC stabilizers and lubricants , but also phenol and urea formaldehyde resin lubricant. Third, the composite stabilizer 3.1 , liquids and liquid barium cadmium , barium cadmium zinc composite stabilizer such composite stabilizer is mainly used for the processing of soft PVC products , the basic components include : ( a ) barium salt - can be alkyl barium phenol 2 - ethylhexanoic acid , barium laurate , barium , barium benzoic acid and substituted benzoic acid , neodecanoic acid and barium . Barium salt complexes accounted 6-7% salt with cadmium ratio is about 2:1.32 ( as metal , by weight , the same below ) . ( 2 ) cadmium salts - can be 2 - ethylhexanoic acid, cadmium laurate, cadmium , cadmium oleate , phenyl and substituted benzoic acid, cadmium , cadmium naphthenate, neodecanoate, and cadmium . Cadmium salt complexes about 3-4% . ( 3 ) zinc salt - may be 2 - ethylhexanoate , zinc laurate , zinc naphthenate , zinc neodecanoate , benzoic acid and substituted benzoic acid zinc. Accounts for the composite zinc 0.5-1% . ( 4 ) phosphite - may be triphenyl phosphite , diphenyl phosphite, an octyl diphenyl phosphite, a decyl phosphite, tris ( nonylphenyl ), etc. In the phosphite complexes about 15-20 % ( by weight ) , as a chelating agent . ( 5 ) Other - include minor amounts of 2,6 - tert-butyl -p-cresol , bisphenol A, nonylphenol and other phenolic antioxidants and ultraviolet absorbers, and a liquid paraffin , white oil, diesel oil, spindle oil mineral oil as solvent , and the need small amount of antifoaming agent such as a higher alcohol . Liquid barium cadmium zinc composite stabilizer because different composition , properties are also different. But is generally pale yellow to yellow clear liquid , specific gravity 0.95-1.02 at room temperature , the viscosity of less than 100 cps , freezing point at -15 ℃ or so. Liquid Ba Ba Cd, Zn and Cd , and similar liquids , has excellent heat and light stability ; initial coloration is small, good transparency and color stability. Their stabilizing effect than solid composite soaps , therefore, may reduce the amount of , usually 2-3 parts , the dust does not occur poisoning, and completely dissolved in the plasticizer in the general , good dispersion, small tendency to precipitate . Wherein the liquid barium cadmium zinc early color than the liquid barium cadmium smaller. 3.2 Liquid Ba-Zn complexes are generally pale yellow to yellow-brown oily liquid , specific gravity of 1.0-1.1 at room temperature , good heat resistance , pollution from sulfur , with an epoxy plasticizer and used to increase the stabilizing effect on the hair foam agents are activation. 3.3 , non-toxic liquid calcium zinc complexes of liquid calcium zinc stabilizer main ingredients are calcium stearate , castor oil , calcium , zinc stearate , castor oil , zinc and epoxy soybean oil , ultraviolet absorber. Liquid calcium zinc stabilizer off

metal soaps major concepts waterproofing agent

Metal soaps waterproofing agents known to avoid water slurry, based fatty acid soap , sodium carbonate, potassium hydroxide, etc. variety of organic compounds , inorganic complex composition, a  low molecular polyethylene waterproof , moisture , enhance and plasticization .
Metal soaps Appearance Milky white liquid waterproofing agent , a plasticizing effect, can reduce the water-cement ratio , after mixed with cement to form insoluble substances, the mortar filling small gap and clogging the capillary channel walls forming hydrophobic membrane , to improve cement mortar compactness and impermeability .
Second, the formulation and  acrylic processing production process
Recipe: stearic acid ( 4.10% ) , sodium carbonate ( 0.15% ) , potassium hydroxide ( 0.72% ) , ammonia ( 3.16% ) and water ( 91.87% ) .
Production process:
First, the acid heated to melt on the pot , and then 1/ 2 the amount of water in the other pot was heated to 50-60 ℃, followed by adding sodium carbonate and kept constant .
Good will melt slowly adding stearic acid and quickly stir, this time will produce a lot of bubbles , to prevent overflow. All will be half of stearic acid added slowly added to the  iron oxide red stirred water into soap .
When the soap is cooled to below 30 ℃ by adding a certain amount of ammonia stir, then use soap 0.6mm sieve sieve to remove blocks , granules and foam , the filtrate in a sealed plastic drum in a cool Department store .

fluorescent agents lack of fear

 Recently , on the " toilet paper when the paper napkin with carcinogenic ", " toilet paper contains large amounts of fluorescent whitening agent is carcinogenic ," saying aroused heated debate on the Internet . So toilet paper and napkins in the end what is the difference ? FWA carcinogenic and whether credible argument ? International plastic flame retardant  Food Packaging Association Executive Vice President and Secretary General Dong Lion said , toilet paper and napkins best not to mix .
According to the relevant national standards, especially toilet paper "toilet paper " and napkin handkerchief belonging to a part of handkerchief including facial tissue , napkins and paper handkerchiefs categories.
" Toilet paper and hygiene standards handkerchief perform different , for example, microbiological criteria , the former is the total number of bacterial colonies per gram paper is less than 600 , while the latter is not more than 200 , the two do not mix benefit human health. Allow the use of toilet paper recycled paper ( recycled pulp ) to produce, but the premise is that these are clean waste paper , used tissue paper must not include them ; while the handkerchief is clear that you want to use virgin pulp , paper production that can not be used . "
" FWA widely used paper , although state regulations in the handkerchief ' mobility is not allowed contain optical titanium dioxide anatase  brighteners ', but on its own terms , I think the human body and do not result in harm ."
" The fluorescent brighteners toilet paper has two main sources: First, recycled paper itself contains , the two manufacturers in the bleach is added later , but add a lot of argument is unscientific because FWA has yellowed points , its content is generally less than 1/1000 ( in paper weight basis ) , the paper will not exceed this amount but will whiten yellowed . " Shen Yongjia said.
In fact, in most countries, handkerchief production is also not explicitly prohibit the use of optical brighteners . In China, in order to avoid consumer concerns handkerchief only allowed to add fluorescent brighteners requirements.
"As for bleaching and spices , is the paper bleaching process . Corrosion and oxidation bleach although very strong, but after processing , basic does not remain in the pulp ; spices , as the paper is the human body may be, if not the sensitive skin or is the spice allergy , no problem . " Shen Yongjia that bleach and add flavor will not endanger human health.
"But the premise is qualified regular manufacturers of paper , like some sinister manufacturers out of inferior black iron oxide  products, sources of raw materials is very complex , and perhaps itself contains bacteria or harmful substances.
"For example , when we went unannounced visits , found some illegal dumping of waste paper manufacturers in one , and some have even moldy , braving the stench of these paper waste paper some life , such as sanitary napkins , disposable diapers are class , but also some some chemical scrap of paper from the paper products produced with a variety of fungi, E. coli, or there is a chemical, pesticide residues harmful to human health

PVC heat stabilizers - glycerin zinc experiment

 PVC heat stabilizers many different types, the article describes the principles and conclusions, mainly to introduce this experimental process.
 The main raw material
PVC, CPM-31, industrial grade, Chenzhou, Hunan Hydro plant; vinegar dioctyl phthalate (DOP), industrial grade, Changsha plastic eight plants; zinc stearate, AR, 99%, city of Hubei Province  PVC heat stabilizer Plastics Additives Plant; calcium stearate, AR, 99%, city of Hubei Province plastic additives plant: Glycerin zinc, homemade; triphenyl phosphite vinegar, industrial, Danyang City, Chang and chemical additives Ltd.;
Epoxy soybean oil, industrial grade, Danyang City, Chang and chemical additives Limited.
Major equipment and instruments
Torque rheometer, XSS a 300, Shanghai Branch Chong Rubber Machinery Co., Ltd.;
Aging test box, 40lB, Shanghai Experimental Instrument Factory;
Electronic universal testing machine, 1) W a 4005, Changchun Institute of Science the new company test equipment;
UV light box, 500W, Beijing Institute of electric light.
Sample Preparation
Formulations shown in Table 1 for quantity, after mixing plus O ~ 100mmx clean glass plate to a thickness of about 0.5 square cladding, plasticized at 160 ℃ 6min, made with Acrylic impact modifier  different stabilizers PVC film, and then were cut into 10mmx20mm samples for performance testing. Performance Testing and Characterization
Determination with Congo red Thermal stability test: GB2917-82 by a predetermined amount of dry mixture to release the tube, and the tubes were not certain depth in an oil bath at an oil bath temperature of 180 ℃ when the measured time of Congo red paper color ; compare the thermal drying heat drying discoloration observed: PVC film on each of the claimed dry aging test chamber set at 180 ℃ heat aging test carried out, test pieces taken every 10min, chromaticity variation test piece was observed, experiment has been extended to appear dark black so far. On the thermal aging specimens quantify the number, color code: 0 a transparent or white, one a pale yellow, 2 a pale yellow, 3 a yellow, four a yellowish brown, 5 a brown, 6 a reddish brown, 7 a deep brown, brown 8-9, a dark brown, 10 to black; dynamic thermal stability test: the torque rheometer mixing chamber temperature reaches 180 ℃, rotor black iron oxide  speed of 45 :/ min when, respectively, according to Table 1 609 Samples were added rheometer dynamic thermal stability test, significantly increased the slope of the torque curve corresponds to the time when the mind is the thermal decomposition time; specimens UV weathering performance test: PvC film release in accelerated aging and UV light box with light stability tests. 40h after sampling by
79 tested GHI040 a tensile strength and breaking elongation, the loading speed of 5 ~ / min, the initial tensile strength and elongation at break compared calculate tensile strength retention ratio and the fracture elongation retention.

Fluorescent Brightener Fluorescent Material Identification

Fluorescent Brightener ] fluorescent material identification diamond ring ring care Material Identification Method One: sensory testing the quality of wedding ring .
Look diamond color [ 1 ] : gold organic pigments  is yellow , K gold yellow , red , and white multicolor, while imitation gold products , mostly copper alloy, lighter in color . Weigh weight : Gold accounted for 19.3g/cm3 considerably higher than the proportion of imitation gold products , such as a gold ring is 5 grams, while the  zinc borate flame retardant same size imitation gold products generally less than 3 grams.
Diamond ring ring care Material Identification Method Two: Check mark.
Origin should play with precious metal jewelry , manufacturers , materials and content mark, unimpressed product is substandard products. Inspection agencies such as quality problems can be detected according to Mark to give judgment . Consumers want to buy according to their own needs imprint brands and different gold gold jewelry.
Diamond ring ring care Material Identification Method three : Professional bodies have been identified .
If you need to know exactly the content of precious metal jewelry or a quality dispute should go to the jewelry quality inspection agency , the use of physical or chemical analysis methods were identified. Need to check carefully when buying jewelry inlaid stone , welding is heat stabilizer for pipe  solid without fracture , glitches , such as trachoma .
Diamond ring ring care Material Identification Method four : Platinum 950 Platinum 900 difference.
Platinum abbreviated PT, we basically know PT950, generally platinum ring is used for this type of material means any material containing 95% platinum jewelry components , and the remaining 5% for other precious metals, imprint of Pt950. Relative T900 containing 90% platinum jewelry components , and the remaining 10% for other precious metals, imprint of Pt900. More hard suited diamonds PT900 , PT950 relatively pure and soft , higher purity , more preservation. Most are Pt900 platinum setting , but there are a few vendors with Pt950 production setting.

stearate dried to obtain opportunities

Drying snatched stearate
 Stearate is an additive for a wide range, the most important role for the polymers
Very good results. Such as polyolefins can be used as an methyl tin stabilizer  acid neutralizer, the article has a good lubricating effect,
Increase life expectancy (for thermosetting products concerned). Market, stearate great demand, generally focused on: Hard
Fat, calcium stearate, zinc stearate, sodium these types. Lianyungang Huaming Tai Material Technology Co., Ltd. is mainly engaged in it
Is that the three categories stearate. Flash dryer as stearate final process section. More than two years, the  foaming agent use of easy
Degree stearate flash dryer for drying effect is remarkable, not only high production efficiency, and human resources required
Source less, greatly reducing the cost of doing business. Drying stearate (calcium stearate, zinc stearate, sodium stearate), the main difficulty lies in mesh powder had
Low in the red iron oxide  dry dust collection can not be good when I expected. Choose the traditional bag dust removal equipment can not solve this
A problem. In response to this situation, the traditional baghouse has been improved, to ensure production of large front
Mention the next, so that the maximum amount of material is collected. Stearate using flash dryer drying, the effect is significant, and
Using flash drying equipment longer high production requirements under full load operation.

food additives (processing aids) use regulations

 I. Purpose: To regulate food additives (processing aids) are used to manage, to ensure food hygiene and food quality and safety. Second, the range: applicable to the corporate food additives (processing aids) procurement, storage, procurement and use. Third, the use acrylic processing  and management of  1, food additives (processing aids) procurement procurement personnel must master food additives (processing aids) the use of performance and potential risks of taking into account the importance of the procurement of goods and hazardous  food additives (processing additives) are generally responsible for purchasing manager personally purchase, procurement, should pay attention to the performance requirements and the PVC shoes stabilizer  relevant precautions  its packaging should identify  and meet state regulations, procurement Shihai To obtain a copy of the relevant supplier evaluation data  food additives (processing aids) of storage Purchasing Manager I must also apply. 2, the storage of food additives food additives (processing aids) in storage before the librarian responsible for its inspection and registration check and correct before storage procedures. Food additives (processing aids) should be individually locked storage, and paste clearly marked to prevent accidental collar. During storage should be checked regularly  attention to retain its original identity. 3, food additives, food additives, hair collar (processing aids) must be limited to the collection and use of sector recipients who receive the n-butyl stearate  required standards should be based on the amount of fill material requisition  requisition must be used by the person in charge of the audit department first Consuming  while before issuing warehouse keeper should carefully examine the content of the audited picklists correct for registration and issuance. 4, the use of food additives using department according to the standard requires the use of use of food additives (processing aids), each food additive (processing aids) the use of non exceeds its specified maximum usage, operation, supervision and inspection must be performed by hand, and carefully recorded by the use of checks and signature confirmation.