Action of heat stabilizers and PVC flame retardant rubber compound of the conveyor belt

 Heat stabilizer is an important class of plastics processing aids , the birth and development of the PVC resin, heat stabilizer synchronization processing is mainly used for PVC resin , heat stabilizer and  WSD Chrolinated polyethylene so PVC resin , the ratio of hard and soft PVC products are a close relationship.
Also known as flame retardant agents, flame retardants or flame retardants : flammable polymer flame resistance conferred functional additives ; By Application divided into additive flame retardant and reactive flame retardant . According to the composition , including adding an WSD chromium oxide  inorganic flame retardant , halogen -based flame retardant ( organic bromides and organic chlorides ) , phosphorus-based flame retardants ( red phosphorus, phosphate esters , and halogenated phosphates , etc.) and nitrogen flame retardants .

Thermal stabilizers in PVC conveyor gum base resin is mainly used to improve the thermal stability of PVC resin in the processing and use , to extend the service life of the article . Such additives include tribasic lead sulfate , barium cadmium zinc liquid stabilizer . The flame retardant effect of the polymer material in the ignition of the flame spread rapidly Buzhi Yu , suppressing flames and heat from the WSD stearic acid  air. Such as antimony trioxide , zinc borate , aluminum hydroxide and the like. Both formulations have a different action can be selected according to the rubber compound formulation conveyor specific purposes.

Application of the principles of heat stabilizer for shoes and some of the main content

The main stabilizer mixture according to tin, lead and the metal of group A, such as blood, barium, copper, zinc classification. Tin stabilizers: 1 or 2 comprising a tin-carbon bond, oxygen or sulfur as  WSD one pack stabilizer the remaining valence bond - tin bond unsaturated anionic tetravalent tin compounds are the most effective stabilizers for PVC. These organic tin compounds are tin oxide or an organic product with the appropriate acid chloride or ester reactions. Synergistic stabilizer mixture are common, typically include various organotin compounds and stream-based wavelet salt (compound) and the auxiliary additives, such as zinc soaps, phosphites, epoxides, esters, ultraviolet absorber, antioxidant agent. Obviously, most of the synergistic composition has a special, and therefore they have not yet WSD PVC lubricants  found fully common. Organotin stabilizers are divided into two types of sulfur and sulfur-free. Sulfur-containing stabilizers are all stable, excellent performance, but the presence of sulfur compounds similar to the taste and cross contamination problems station. Lead salt stabilizer compound, lead oxide content greater than 50%, compared with the conventional stabilizing agents, can reduce the amount of 10% to 30%, with a high efficiency and stability, and without grinding, directly into a kneading pot used for cable material, not only excellent in dispersibility, but also to maintain good  WSD zinc stearate electrical and mechanical properties of PVC. The organic / inorganic composite heat stabilizer S Series microcrystalline tribasic lead sulfate, the product of the reaction crystallization process, the original long needle becomes microcrystalline, thus greatly improving stabilizers in PVC resin dispersion and thermal stability. Low lead compound stabilizer KD series, with outstanding thermal stability

The main purpose and introduce phosphate dibasic lead

Usually used as a reducing agent and pesticide intermediates. Whitening agent used in the manufacture of nylon , plastic stabilizer , synthetic fibers, dibasic lead phosphate , glyphosate, water treatment  WSD Titanium dioxide rutile agent , such as potassium dihydrogen phosphate and sodium ATMP manufacturing phosphite , synthetic fibers, plastics and stabilizers organophosphorus pesticide raw materials. Polycarbonate can be used as a stabilizing agent , also used in the manufacture of nylon 1010 antioxidant , but also for the production of highly efficient water treatment agent ATMP.
English name : Dibasic lead Phosphite
MF : 2PbO · PbHPO3 · H2O Properties: white or  WSD PVC lubricants slightly yellow powder. Sweet poisonous. Density of 6.1 , the refractive index of 2.25 , at about 200 ℃ becomes gray and black , about 450 ℃ turns yellow . And all of the water-insoluble organic solvent , dissolved in hydrochloric acid , nitric acid. Has excellent weather resistance properties , thermal stability, electrical insulating properties , and  WSD Aluminum hydroxide resistance to oxidation and ultraviolet shielding performance. Lead content ( PbO dollars ) % 89.0-91.0 89.0-91.0 88.5-91.5
Phosphorous acid (H3PO3 meter ) % 10.0-12.0 10.0-12.0 9.0-12.0 Heating loss % ≤ 0.30 0.40 0.60 Residue (75μm sieve )% ≤ 0.30 0.40 0.80 Purpose: PVC and PVC / polyethylene copolymer heat stabilizer composition . Mainly used for opaque hard and soft goods, especially outdoor cables, building panels , corrugated sheet , pipe and so on.

Some simple request intenal lubricant's

pvc lubricants lubricants can be divided into two kinds of internal and external lubricant pvc pvc, pvc external lubricant main role is to improve the frictional heat the metal surface of the polymer melt and processing equipment. It is less compatible with the polymer is easy to migrate out from the melt, so the lubrication can be formed in a thin WSD Polyethylene wax  layer of plastic and metal melt interface. pvc lubricants have good compatibility with the polymer properties, which serves to reduce the effect of cohesion between the polymer molecules within the polymer, thereby improving the plastic melt in the heat of friction and melt flowability. Commonly used lubricants are stearic acid and salts thereof outside; internal lubricant is a low molecular weight polymer. Function of some other lubricants. Each lubricant has actually can achieve a required role in internal and external lubrication always together, but in a way more prominent. A lubricant with different polymers under different processing conditions or exhibit different lubrication, such as high temperature, high pressure, pvc in the lubricant will be squeezed out and become pvc external lubricant. From the perspective of processing machinery, in mixing, rolling, etc. slush molding process, external lubricant has an important role in extrusion, injection molding, the lubricant is more effective. The amount of lubricant is generally 0.5% to 1%, the choice should pay attention to the following aspects: (1) the flow properties of the polymer molding process needs have been met, then the role of the main considerations lubrication to ensure internal and external balance; ( 2) lubrication is valid, it can be in the temperature during molding, the plastic surface to form a complete liquid film, and may be so close to the melting point of the lubricant outside the molding temperature, but to a difference of 10 ℃ ~ 30 ℃ order to form a complete film; (3) When selecting a lubricant in production should be so as to achieve the following requirements: (4) moderate size, the internal balance and external lubrication resin compatibility effect; non-blooming, easy scaling; (5) surface gravity is small, small viscosity, the expansion of the interface, easy to form an interface layer;
(6) as far as possible without reducing the  WSD Metallic stearate excellent properties of the polymer, does not affect the performance of the secondary processing of plastics;
(6) itself is excellent in heat resistance and chemical stability, does not decompose during processing, non-volatile;
(7) non-corrosive, does not pollute the film, there is no toxicity.
However, the mere use of a lubricant is often difficult to achieve the purpose, to be used in combination of several lubricants, lubricating composite developed rapidly in recent years, the choice can be to look at the role of multi-angle lubricant. Commonly used lubricants are stearic acid, butyl stearate, oleic acid amide, ethylene bis stearic acid amide.
Many substances can be used as a lubricant wax, natural waxes such as liquid paraffin (mineral oil), microcrystalline wax, etc., but the effect is mixed. Natural waxes more to do with external lubrication, the lubricant can be used as a variety of plastic, a release agent, generally the amount of 0.2 ~ 1phr, but its compatibility, thermal stability and dispersibility is not good, the amount is not too large, and preferably lubricants and use; while shortening more to do with PVC, PS, lubricants, lubricating properties, thermal stability is also very good, the general amount 0.5phr they are drug-free, can be used for food packaging. Another kind of microcrystalline wax: in the plastic processing is also used as a lubricant in an amount of 1 ~ 2Phr, good thermal stability and lubricating property than normal paraffins. Low molecular weight polymers are widely used as a lubricant such as polyethylene wax, low molecular weight polypropylene, the inner and  WSD Chlorinated paraffin outer are better lubricity, and non-toxic. Polyethylene wax materials suitable for PVC extrusion, calendering, the amount is generally 0.1 ~ 1phr, processing efficiency can be improved to prevent the adhesion of the film to improve the dispersion of fillers or pigments, compatibility and transparency is not good; irregular low molecular weight polypropylene as the structure rigid PVC, PE lubricant, excellent performance, other additives to improve dispersibility.

What are the characteristics of siliceous plastic lubricant

Product Features: Excellent moisture, waterproof, dustproof, shock-absorbing, blocking, buffering, noise lubrication, sealing and damping properties.
 Excellent high temperature performance: a wide temperature operating range applies (-40 ~ 200 ℃), good viscosity-temperature performance, eliminate carbide thermal oxidative stability, low temperature fluidity, temperature, temperature difference at different damping WSD Plastic impact modifier  torque results excellent, smooth, Excellent noise performance lubrication. Excellent adhesive properties: a high compression ratio of the oil molecules, very outstanding adhesion properties, the drawing performance is significantly (synthetic polymer materials and metal materials have high adhesion), good shear stability and electrical insulation, ultra Long reciprocating actuator life. Excellent stability: high chemical inertness (acid, alkali reaction is not active), the loss is not easy, not volatile at room temperature, no carbonation, no hardening resistance stable, very excellent mechanical stability, safe and nontoxic. Excellent compatibility: anti-corrosion, anti-rust, and most plastics and rubber, various WSD Chlorinated paraffin  media good compatibility. Recommended Applications:
1, between long-term lubrication for plastic / plastic, plastic / metal, metal / rubber low or wide temperature and sliding bearings, suitable for pneumatic valves, valve body and dynamic seals lubricated  piston and cylinder seal;
2, automotive transmission gear for extended temperature environments, the number of idle stepper motor, control cables (throttle, brake), fuser film lubrication closed permanently lubricated on the speedometer, printers, copiers fuser assembly;
3, for cold starting when needed to reduce the  WSD Stabilizers for pipe starting torque of the workplace, such as long-lasting lubrication electronic clock, cameras, optical instruments, transmitters, refrigerator fan bearings, mobile refrigeration equipment and servo gears.

The main reason heat stabilizer for shoes heat discoloration

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 Plastic impact modifier  actual heat stabilizers have

different functions due to exhibit different thermal stability

characteristics, can be divided into early-type, long-term, intermediate-

and versatile four.
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of Fan, its famous through the ages "first and worry about the world,

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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  Chlorinated paraffin 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 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 Polyethylene wax  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.

Some of the major components of plastic lubricant

We are not a pure plastic material generally used , which is made ​​of material prepared by a number . Wherein the polymer (or synthetic resin ) is the main component of plastic, in addition , in order to improve the performance of plastics , but also add a variety of auxiliary materials such as fillers , plasticizers , lubricants , stabilizers in the polymer, coloring agents , in order to become a good performance plastics.
A synthetic resin, synthetic resin is a main component of plastic, the plastic content is generally 40% to 100%. As  WSD aluminium stearate the content of large, but the nature of the resin often determines the nature of plastic, so people often plastic resin as a synonym . For example, polyvinyl chloride resin and PVC , phenolic resin and phenolic confused. In fact, resins and plastics are two different concepts. Original polymer resin is a raw , it is not only used to make plastics , but also coatings, adhesives and synthetic materials. In addition to the very small number of plastic resin containing 100% , the majority of plastics , in addition to the main component of the resin , but also need to add other substances.
2 , also known as filler of fillers , which can improve the strength and resistance to heat , and cost . E.g. a phenolic resin is added after the flour can greatly reduce costs, the most inexpensive one phenolic plastics , as well as significantly improved mechanical strength. The filler may be divided into two types of inorganic fillers and organic fillers , such as wood flour former , rags , paper and various textile fibers , which, as glass fibers, diatomaceous earth , asbestos , carbon black and the like.
3 , a plasticizer , and a plasticizer to increase the flexibility of the plastic plasticity , reducing brittleness , so that the plastic processibility . Plasticizers are generally miscible with the resin , non-toxic , odorless, light, heat stable, high boiling point organic compounds, the most commonly used phthalates . E.g., the production of PVC , plasticizer , if adding more soft PVC can be obtained , if not add plasticizers or less (the amount of < 10% ) , then a rigid PVC .
4 , a stabilizer to prevent the WSD Chrolinated polyethylene  synthetic resin by the action of light and heat during use in the processing and decomposition and destruction, extended service life , to add the stabilizer in plastics . Commonly used are stearates, such as epoxy resin .
5 , plastic colorant colorants can have a variety of bright , beautiful colors. The organic dyes and inorganic pigments used as a colorant . Specialty Plastics
6 , the lubricant is to prevent the lubricant in the molding of plastic stick on the metal mold, while allowing a smooth plastic surface appearance . Commonly used lubricants are stearic acid , calcium and magnesium salts and the like .
7 antioxidants prevent the plastic molding or WSD Chlorinated paraffin  heating at high temperature thermal oxidation during use , leaving yellow plastic , hair crack , etc. In addition to the above additives , the plastic may also be added flame retardants, foaming agents, antistatic agents so as to meet different requirements .