Preparation of leadless organic silicon and organic boron heat stabilizer of ploychlorovinyl

Abstract

A leadfree organic silicon and organic boron thermal stabilizing agent for polyethylene is prepared from oxides containing silicone, boron or carbon, etc. as raw materials, by etherifying, esterifying and acidating to organic silicone, boron or carbon oligopolymers with inorganic elements as cores and regular molecular chains to be no metal contained thermal stabilizing agents with better performance than lead thermal stabilizing agents. It is produced with low cost and without wastes in production and toxicity in use.

Description

1. Technical field [0001] The invention belongs to the field of chemical industry, and relates in detail to a method for preparing lead-free organosilicon and organoboron by using organic compounds such as silicon, boron, and carbon oxides or oxygen-containing compounds, fatty alcohols, fatty acids, acid anhydrides, and fatty amines as raw materials. Polyvinyl chloride heat stabilizer method. 2. Background technology [0002] As we all know, due to the molecular defects in the PVC molecular chain, it is easy to release hydrogen chloride during the processing process and cause aging and discoloration. Therefore, heat stabilizers are the most important additives in PVC processing. So far, in PVC hard products, the main stabilizers are various lead salts and composite lead. Although lead stabilizers have good thermal stability, the toxicity of lead salts is well known. With the improvement of environmental awareness, lead salts The pollution and toxicity to the environment wil...

AI Technical Summary

Problems solved by technology

So far, in PVC hard products, the main stabilizers are various lead salts and composite lead. Although lead stabilizers have good thermal stability, the toxicity of lead salts is well known. With the improvement of environmental awareness, lead salts Environmental pollution and toxicity will seriously affect its market

In PVC soft products and transparent products, organotin, liquid barium, cadmium, zinc and phosphite are the main products. Although some of these varieties are less toxic, they have a strong pungent smell and pollution. environment, and the cost is high

Used alone, its thermal stability is difficult to meet the requirements of PVC processing

In addition, the rare earth stabilizers developed in recent years also have a certain market, but rare earth products have high production costs and low thermal stability and cannot be used alone. They must be used in conjunction with lead salts, cadmium, zinc and other stabilizers. use, which also makes it subject to certain restrictions