Some simple analysis of heat stabilizer for shoes

A) cadmium, zinc soap is typical of early-type heat stabilizers, can quickly absorb HCL, and effectively substituted with carboxylate PVC unstable chlorine atom in the catalytic chain Cd, Zn, thereby effectively suppressing early degradation and coloring , but because of the WSD Plastic impact modifier  consumption of fast and transformation products CdC12, ZnC12, but also off the HCL efficient catalyst PVC, PVC and thus lead to the degradation of the material suddenly vicious black, so poor long-term thermal stability.
2) barium, calcium soaps are typically long-term thermal stabilizers, absorption HCL function only and therefore can not inhibit coloring PVC, but the conversion product BaC12, CaC12 do not have  WSD zinc stearate catalytic activity, does not cause a sudden black PVC, long-term heat stability better.
3) fatty acids, organic tin are intermediate, both absorption HCL, can effectively replace with carboxylate unstable chlorine atoms PVC chain, and transformation products do not have catalytic activity.
4) mercaptan organotin it has versatile features, while a variety of mechanisms can stabilize PVC, transformation products do not WSD Polyethylene wax  have catalytic activity, and therefore both excellent initial and long-term thermal stability effect. First of cadmium and zinc compounds are used as stabilizers because of their transparency, and can maintain the original color of PVC products. Long term thermal stability provided by the pot is much smaller than the barium and zinc compounds. They tend to be very small in the case of threatened or without warning, suddenly completely degraded.