Polyvinyl WSD processing aid is one of five common plastic

Polyvinyl chloride (PVC) is one of five general-purpose plastics , its products have a wide range of uses. However , PVC thermal stability exists disadvantages must be added when a suitable heat processing stabilizer to inhibit thermal degradation. Heat stabilizers Metallic stearate commonly used in industry are mainly inorganic lead salts and organic tin, metallic soaps . However , one of the most common varieties are poisonous , which not only limits the scope of application of PVC products and harm to the environment and their use of labor health PVC products are produced with sustainable growth and rapid deepening. To protect the environment , improve the working conditions of health in recent years in Europe , America, Japan, and the country has been developed and implemented to limit the use of hazardous chemicals policies and regulations. Therefore , research and development at home and abroad are set off and promote the use of non-toxic substance heat stabilizers to replace traditional toxic varieties boom. Rare is the advantage of PVC plasticizer our resources , rare earth compounds as PVC heat stabilizer application has attracted wide attention . In principle , since the rare earth hydroxide with a weakly alkaline medium and can absorb HCl, and hence, a heat stabilizing effect PVC . But until now , although the literature involving alkaline earth metal hydroxide is calcium hydroxide as a particular application of PVC heat stabilizers , but no rare earth hydroxide is used as PVC heat stabilizers research reports . Recently , the experts for the development of cost-effective environmentally friendly zinc-based PVC heat stabilizers, inorganic compounds as application performance heat stabilizer for a more systematic study found that lanthanum hydroxide is an effective synergist heat stabilizers.