Zinc stearate is a white powder, insoluble in water, soluble in heat It contains organic solvents such as ethanol, benzene, toluene, and turpentine; it decomposes into stearic acid and corresponding salts when exposed to acids; it is a fire hazard under dry conditions, with an autoignition point of 900°C; it is hygroscopic.
Zinc stearate is a commonly selected additive for PVC resin plastics
Zinc stearate is one of the many polymers used in Multifunctional additives, based on their unique and diverse physical and chemical properties, have been widely and importantly used in many important fields such as plastics, coatings, greases, textiles, construction, papermaking, pigments, etc., and are constantly being used in new applications. The route has been developed, and its main application areas are the coatings, plastics and rubber industries; for example, it can be used as a heat stabilizer, lubricant, grease, accelerator or thickener in the resin field, usually as a heat stabilizer for PVC resin.
PVC (polyvinyl chloride) is currently one of the most widely used plastics in the world after polyethylene. It has won broad popularity for its flame retardant, insulating, wear-resistant and other properties. market. Due to its own structural defects, PVC resin and its products are prone to thermal degradation and aging. Its processing temperature of 160°C is higher than the decomposition temperature of 120°C. Therefore, in order to turn PVC into products, it must be processed during the molding process. By adding heat particles, zinc stearate can capture the fallen hydrogen chloride on the one hand, and on the other hand, it can replace the chlorine atoms in the allyl chloride present in the polymer to produce a relatively stable ester, thereby eliminating dehydrochlorination in the polymer material. The trigger is far. Therefore, zinc stearate is usually chosen as a heat stabilizer and lubricant for PVC plastics in the field.
微信扫一扫打赏
Chinese