The main types of PVC stabilizers are lead salts and dust-free composite lead salt heat stabilizers, rare earth composite stabilizers and calcium and zinc stabilizer heat stabilizers.
Lead salt heat stabilizer is a product developed successfully in the 1950s, and it has occupied a major position so far. Non-toxic, non-polluting, compound and high-efficiency PVC non-toxic stabilizers have become the research and development trend of PVC additives.
The rare earth composite stabilizer has brightening function, excellent weather resistance and insulation.It also has the effect of initializing and compatibilizing.
The calcium/zinc composite stabilizer is divided into solid powder and liquid.
Calcium and zinc stabilizer is synthesized by special compound technology with calcium salt, zinc salt, lubricant and antioxidant as main components. It has good thermal stability, light stability, transparency and tinting power. In PVC resin products, the processing performance is good, the thermal stability is equivalent to the lead salt stabilizer, and it is a good non-toxic stabilizer.
At present, with the increasing demand for product quality and environmental protection, the application of calcium and zinc stabilizers has become more and more extensive.