Commercial producing method for poly aromatic ether nitrile high molecular halogen-free fire retardant

Abstract

The present invention provides a industrial production process of halogen-free fire retardant of polyarylene ether nitrile, and relates to the production of polymer. The polyarylene ether nitrile is prepared with 2, 6-dichloro benzonitrile, polyatomic phenol and polybasic alcohol as material and through hydroxylation, esterification, polymerization to obtain oligomer of molecular weight 3000-5000. The high efficiency halogen-free fire retardant is used widely in plastic industry, and has high fire retardant performance up to 0.8mm IL94-Vo grade, oxygen index (LOI) over 32, less smoke, low smoke tolerance, and heat resistance of 400-500deg.c and other good performance.

Description

technical field [0001] The invention relates to a production process of a plastic polymer. Background technique [0002] There are many kinds of flame retardants. Currently, the commonly used flame retardants are: organic halogen (bromine and chlorine), organic phosphorus and inorganic. With the rapid development of the national economy, plastic products are more and more widely used in various fields of production and life, but at the same time, floods caused by the flammability of plastics have also brought casualties and economic losses. Therefore, since the 1960s, some developed countries have begun to produce and apply flame-retardant plastics. In the 1970s, the consumption and variety of foreign flame retardants increased rapidly, with an annual growth rate of 6-8%. The American Business Communications Corporation (BCC) predicted that the annual growth rate of flame retardants was 5.2%. my country's flame retardant research started late. In 1985, there were only more...

AI Technical Summary

Problems solved by technology

The advantages of halogen flame retardants are less dosage, high flame retardant efficiency, and wide adaptability, but their serious disadvantages are that they generate a lot of smoke and toxic and corrosive gases during combustion, which is very harmful.

[0003] High-efficiency halogen-free polymer flame retardants are the main direction of flame retardant research in the world today. At present, the organic halides normally used in China, and some halogen-free flame retardants are small molecular compounds, which produce a lot of smoke and are toxic and highly corrosive when burned. volatile gas, which seriously pollutes the environment and causes fire-fighting obstacles, while the domestic production of inorganic compound flame retardants accounts for a small proportion, and when used in plastic products, it affects the mechanical properties of the product, especially the impact strength; it is easy to change the fluidity of the resin, affecting Poor processing performance and temperature resistance, mostly decomposed at 300°C

Not using the medium and high-end flame-retardant plastic products with high performance, high precision, good temperature resistance and stable product performance,