Phosphate ester polymer intumescent flame retardant and preparation method thereof

Abstract

The invention discloses phosphate ester polymer intumescent flame retardant and a preparation method thereof. Polyhydroxyl acid compound serves as raw materials, and carboxyl is protected by esterification; and in the presence of phase transfer catalyst, with an interfacial polymerization method that esterified polyhydroxyl compounds, such as diphenolic acid methyl ester and phenyl dichlorophosphate, serve as main raw materials, an obtained intermediate polymer comprises a polyhydroxyl acid methyl ester and phenyl dichlorophosphate reaction unit. The synthesis method has the advantages of simple technology and cheap and abundant raw materials, is easy to operate and is suitable for industrial production; and the reaction is easy. The intermediate polymer and amido compound carry out esteramine solution reaction under the action of the catalyst to obtain the intumescent flame retardant. The flame retardant does not contain halogens and belongs to the environmentally-friendly flame retardant. The structural general formula (III) of the phosphate ester polymer intumescent flame retardant is showed as follows.

Description

technical field [0001] The invention relates to a design and preparation method of a phosphoric acid ester polymer. Specifically, it relates to a halogen-free, green and environment-friendly phosphoric acid ester polymer intumescent flame retardant used in the field of flame retardants and a preparation method thereof. Background technique [0002] With the advancement of science and technology, the application fields of organic polymer materials are becoming more and more extensive. However, most polymer materials are flammable, and the fire hazards caused by them have become a social issue of global concern. [0003] Flame retardants currently used in industrial production can be roughly divided into two types: halogen-based and halogen-free. Because halogen-containing flame-retardant materials produce more smoke and toxic and corrosive gases when burned, causing serious "secondary disasters", some brominated flame retardants have been banned in the RoHS directive issued...

AI Technical Summary

Problems solved by technology

According to the number of flame retardant components, it can generally be divided into single-component and multi-component intumescent flame retardants, but these are all small molecule flame retardants, which will be precipitated, Migration and other issues

Moreover, the traditional preparation process conditions are relatively harsh, and generally need to be carried out under inert gas protection and anhydrous conditions, and the conditions are not easy to control; in addition, commonly used phosphorus oxychloride, phosphorus pentoxide, etc. are used as synthetic raw materials, which have certain corrosiveness. There are disadvantages such as not easy to store

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