complex metal soap heat stabilizers on the thermal stability of

 PVC heat stabilizers generally based on processing of tribasic lead sulfate ( three salt ) , dibasic lead stearate ( two salt ) -based, then add a small amount of lead stearate ( hard lead ) and calcium stearate ( hard calcium ) , may be used alone , can be reasonable, made ​​of composite lead salt stabilizer. The toxicity of lead cause for great concern , three magnesium stearate  salt , two lead salt stabilizer higher indifferent people , and thus the metal soap -based heat stabilizer ( particularly a lead-free metal soap ) for people concerned , the thermal stability of the metal soap mechanism has become a hot topic. Because PVC heat stabilizers in the production aspect is protected by patents , so there is no reported its exact composition and epoxidation of soybean oil  content . Commercial heat stabilizers are commercially available mixture of various compounds . Mixture is better than pure substances stabilizing effect . Meanwhile , in dealing PVC heat stabilizers are required to carefully consider its toxicity. PVC, processors and consumers should pay attention to warnings about the toxicity of stabilizer . With  plastic additive advanced equipment and technology can analyze the chemical composition of the stabilizer . Composite metal soap heat stabilizers 4180 ( referred to 4180 ) is a novel heat stabilizer PVC processing , is to analyze them in order to provide a viable analysis technique , it is beneficial for heat stabilizers toxic substances supervision.