Preparation method for (PVC) nontoxic calcium zinc heat stabilizer and uses thereof

Abstract

The invention discloses a manufacturing method of composite intoxic Ca-Zn heat stabilizer, which is characterized by the following: fusing high-level aliphatic acid and Ca-Zn oxide or hydroxide without solvent directly to synthesize integral stabilizer; complexing with sodium biphosphate, beta-diketone and bisphenol A; shortening manufacturing period from 15h to 6h; saving cost obviously.

Description

technical field [0001] The invention relates to a preparation method and application of a (PVC) non-toxic calcium-zinc heat stabilizer. Background technique [0002] Polyvinyl chloride (PVC) is the second largest plastic species next to polyethylene. Its most notable features are high strength, good insulation, and good transparency. It is widely used in construction, electrical appliances, packaging and other industries. The biggest disadvantage of PVC is that it will degrade under long-term heating conditions and release hydrogen chloride gas, which will affect the performance of the product. The solution is to add heat stabilizers during PVC processing to prevent or delay this degradation. [0003] PVC heat stabilizers have experienced the development process from lead salts to barium, cadmium, zinc soaps, fatty acid rare earths, and non-toxic calcium-zinc heat stabilizers. So far, domestic heat stabilizers have formed more than 40 conventional varieties. The production ...

AI Technical Summary

Problems solved by technology

At present, lead salt stabilizers are still the main products in China, but non-toxic heat stabilizers have attracted more and more attention, and will replace toxic heat stabilizers such as lead salts. Development is an obvious example, but in general, the stability of rare earth heat stabilizers cannot meet the needs well, and calcium-zinc composite heat stabilizers are considered to be the inevitable development trend of heat stabilizers

So far, the main disadvantage of calcium-zinc composite heat stabilizers is that the stability in the later stage is not ideal, and it needs to be compounded with various auxiliary stabilizers, generally composed of calcium-zinc soap and various additives

The traditional calcium soap and zinc soap production process and cycle are long, energy consumption is high, and impurities are easily introduced to affect product performance. These problems have not been well solved technically.