Preparation method of intumescent flame retardant synergist adopting saccharide derivatives

Abstract

The invention discloses a preparation method of an intumescent flame retardant synergist adopting saccharide derivatives and belongs to the technical field of flame retardant materials. The method comprises steps as follows: 1) a high-carbon graft polymer is prepared from chitosan graft polyacrylic acid; 2) N-acetylated chitosan graft polyacrylic acid is prepared, that is, solid chitosan graft polyacrylic acid is dissolved in an acetic acid aqueous solution, 1,2-propylene glycol is added, the mixture is left to stand at the room temperature for degassing for 1 days, and a degassed mixed liquid is obtained; an acetylated solution is slowly added to the degassed mixed liquid through a constant-pressure dropping funnel, the mixture is stirred at the room temperature to react for 5 h, the obtained solution is adjusted to be alkaline with 1 mol / L of sodium hydroxide after the reaction, and an N-acetylated chitosan graft polyacrylic acid aqueous solution is obtained; 3) solid N-acetylated chitosan graft polyacrylic acid, namely, the intumescent flame retardant synergist adopting saccharide derivatives, can be obtained through evaporative crystallization and drying. The preparation method adopts the simple and green process, and the prepared flame retardant synergist is efficient and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of flame retardant materials, and in particular relates to a preparation method of a sugar derivative expansion type flame retardant synergist. Background technique [0002] Every year in the world, fires caused by synthetic polymers or natural polymer materials cause a large number of casualties and huge economic losses. In order to reduce the probability and danger of fire, flame retardant materials are required in many occasions, and many flame retardant standards, test methods and specifications have been formulated. Halogen flame retardants were used the most in the early days, because halogen flame retardants have good compatibility with polymer materials and good flame retardant effect, they were once favored by users, but this type of flame retardants also has fatal The disadvantages of using halogen flame retardants to flame-retardant polymers produce a large amount of toxic gases, corrosive gases ...

AI Technical Summary

Problems solved by technology

[0003] At present, there are already commercialized intumescent flame retardant additives in foreign countries. Most of them use pentaerythritol (PER) as a raw material, which is expensive, resulting in high prices.

At the same time, the U.S. Borg-Warner Chemical Company has developed a melamine phosphate intumescent flame retardant with a cage structure, but because the synthesis yield of this flame retardant is very low, the manufacturing cost is relatively high

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