Intumescent flame retardant of star-shaped boric acid ester derivative and preparation method of intumescent flame retardant

Abstract

The invention discloses an intumescent flame retardant of a star-shaped boric acid ester derivative and a preparation method of the intumescent flame retardant. The star-shaped boric acid ester derivative is 1,3,5-three-{4,6-two-([1,3,2] dioxaborolane-2-oxo)-1,3,5-triazine-2-oxo} benzene. When the intumescent flame retardant is prepared, phloroglucinol and N, N-diisopropylethylamine are added into tetrahydrofuran solution; mixed solution is dripped into tetrahydrofuran solution of cyanuric chloride, stirred, filtered and separated to obtain intermediate products 1; ethylene glycol and methylbenzene are stirred and mixed, temperature is gradually risen, boric acid is added, the temperature continues to be risen, and backflow and reaction are performed; the methylbenzene is removed, and drying is performed to obtain intermediate products 2; the intermediate products 2 are dissolved in the tetrahydrofuran solution under protection of nitrogen, sodium hydroxide is added, the tetrahydrofuran solution with the intermediate products 1 is added in batches, and continuous reaction is performed for 3-6 hours; purification is performed to obtain target products. The obtained products can serve as excellent environment-friendly organic flame retardants.

Description

technical field [0001] The invention relates to an environment-friendly flame-retardant polymer material, in particular to an intumescent flame retardant based on a star-shaped borate ester derivative and a preparation method thereof. Background technique [0002] Compared with traditional inorganic metal materials, polymer materials have their own unique advantages, and they play an increasingly important role in the national economy and people's lives. However, most polymer materials are flammable materials, which will pose a huge threat to people's property and life, so flame retardants are very important. Flame retardants can be divided into inorganic flame retardants and organic flame retardants according to their attributes. Inorganic flame retardants have the advantages of low smoke, low toxicity, halogen-free, good stability, and low price. The disadvantages such as poor capacitance and reduced material performance are limited to a certain extent. Although the trad...

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Problems solved by technology

[0003] Boron, phosphorus and nitrogen are all flame retardant elements. Although organic phosphorus flame retardants containing flame retardant phosphorus in the organic molecular structure have good flame retardant properties, they have certain toxicity.

While the organic nitrogen flame retardant containing only one flame retardant element nitrogen in the organic molecular structure is non-toxic, but its flame retardant performance is relatively weak.

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