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nature : to prevent polymer in the process of the thermal degradation of the material, but also to prevent the use of products in the long process of aging. The main categories are : (a) Basic lead salts, such as the three basic lead carbonate and two alkaline phosphatase Asian lead, its heat resistance, electric insulation was good, but toxic, transparent, decentralized nature poor. (2) free fatty acids, mainly lauric acid and stearic acid levels of cadmium, barium, calcium, zinc and magnesium. Normally barium and cadmium free soap, zinc and calcium soap and soap used to generate synergies. Soap toxicity of cadmium, barium soap a certain toxicity, and calcium and zinc soap Soap nontoxic. (3) organic tin, as two of thioglycolic acid isooctyl is a two octyl tin, have good transparency in recent years, the fastest-growing category. (4) Organic assisted stabilizer, mainly Asian phosphate and epoxy compounds with metal stabilizer and is used to produce synergies. (5) composite stabilizer, GM of cadmium - barium, resistance to the barium sulfide pollution-zinc-toxic calcium-zinc and organic tin and other types of complexes, most of the liquid. Thermal stability of polymer dose is the largest PVC and vinyl chloride copolymers, the general soft products consumption of around 2%, rigid products for the 3% to 5%.
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