Heat stabilizer for PVC and synthesizing method of heat stabilizer

Abstract

The invention provides a novel metallic soap heat stabilizer. The novel metallic soap heat stabilizer structurally comprises maleimide groups, substituted amide groups, multi-ether groups and metal ions and can be used as the heat stabilizer in a PVC processing process. Compared with an existing heat stabilizer, the novel metallic soap heat stabilizer has the advantages that multiple functional groups are synthesized in the same molecule to achieve a better synergistic effect; due to the fact that multiple ether groups and amide bonds exist in the molecules, Lewis acids such as zinc chloride generated in the processing process can be fast complexed, zinc burning in product processing is reduced greatly, and good long-acting heat stability is achieved; the heat stabilizer is novel in structure, simple in synthesis process route, rich in raw material source, nontoxic, environmentally friendly, better in preliminary and long-acting heat stability as compared with a traditional calcium-zinc stabilizer, low in use amount, good in compatibility with polymer and capable of being used as the upgraded product of the traditional calcium-zinc heat stabilizer; the zinc and calcium soap of themetallic soap heat stabilizer can be used as the main heat stabilizer, and the adding amount of the main stabilizer in the stabilizer is 1-40%.

Description

technical field [0001] The invention belongs to the technical field of synthesis and the field of plastic additives, and in particular relates to a preparation method of fatty acid with polyether bonds and maleimide and its metal soap and its application in PVC processing. Background technique [0002] Halogen-containing polymers all have a series of degradation behaviors due to the shedding of halogens during processing. The most representative polyvinyl chloride (PVC) molecular structure has many defective structures. It is prone to dehydrochlorination and degradation under severe conditions. As the degree of degradation continues to deepen, the color of PVC resin continues to deepen until it is close to black, and the mechanical properties of the product are also severely damaged. Therefore, heat stabilizers must be added in the processing of PVC products. [0003] Traditional lead heat stabilizers have been basically banned due to their toxicity. Organotin heat stabili...

AI Technical Summary

Problems solved by technology

Organotin heat stabilizers have excellent thermal stability and transparency, but they are expensive, have peculiar smell, and some organotins are harmful to the central nervous system of the human body, making their use more and more restricted

Calcium / zinc heat stabilizers widely used at present have shortcomings such as insufficient heat stabilizers and easy precipitation, etc., and need to be used with other auxiliary heat stabilizers to significantly improve the heat stability of PVC, which increases the economic cost and the formula is relatively Complex, higher requirements for quality control

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