PVC with a metal soap stabilizers

Metal soap as a stabilizer, mainly for the stearate aluminum  plastics industry, particularly PVC use more. Stabilizer for PVC, mostly for cadmium, barium
, Calcium, zinc, aluminum, magnesium, higher fatty acid salts, particularly salts of stearic acid and lauric acid. They play a hydrogen chloride
Acceptor effect, metallic soap of carboxyl group and a chlorine atom PVC replacement reaction, since the esterification of PVC stabilized. In most cases, the esterification reaction rate ZnCdPdCaBa. Because cadmium toxicity, have now banned. Zinc soaps are
Complementary role with the stearate aluminum  best stabilizers, but long-term stability is poor, the price cheaper, non-toxic, can be used in food packaging films.
Common Ownership zinc stearate, zinc laurate, ... PVC heat stabilizers generally based on processing tribasic lead sulfate (three salt),
Dibasic Lead Stearate (b salt)-based, then add a small amount of lead stearate (hard lead) and calcium stearate (hard calcium), can be a single
Alone, can also be a reasonable match, made of composite lead salt stabilizer. Because the toxicity of lead cause for great concern
, Three salt, two lead salt stabilizer higher indifferent people, and thus the metal soap-based heat stabilizer (particularly excluding
Lead metal soaps) concern for people, the thermal stability of the metal soap Mechanism has become a hot topic. Because PVC heat
Stabilizer in the production aspect is protected by patents, so there is no reported its exact composition and dibutyl phthalate  content. Commercially available commercial thermal stability
Setting agent is a mixture of various compounds. Mixture is better than pure substances stabilizing effect. Meanwhile, in processing PVC heat
Stabilizers should carefully consider its toxicity. PVC, processors and consumers should pay attention to warnings about the toxicity of stabilizer.