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Bis(2,4,6-tribromophenoxychloropropyl) dimethyl silicate compound and preparation method thereof

A technology of tribromophenoxychloropropyl and dimethyl silicate, applied in the field of dimethyl silicate bis(2,4,6-tribromophenoxychloropropyl) ester compound and its preparation , can solve problems such as difficulty in finding substitutes, and achieve the effect of large molecular weight, low volatility and good compatibility

Active Publication Date: 2018-04-27
HUZHOU RUIGAO NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the European Union announced in 1986 that it was found that polybrominated diphenyl ether flame retardants produced carcinogenic substances when burned, the use of halogenated flame retardants has been restricted to a certain extent.
However, due to the excellent comprehensive cost performance of halogenated flame retardants, and it is difficult to find ideal substitutes, it has become an important research direction for halogenated flame retardants to research and develop high-efficiency halogenated flame retardants to reduce the amount of flame retardants and reduce their toxicity.

Method used

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  • Bis(2,4,6-tribromophenoxychloropropyl) dimethyl silicate compound and preparation method thereof
  • Bis(2,4,6-tribromophenoxychloropropyl) dimethyl silicate compound and preparation method thereof
  • Bis(2,4,6-tribromophenoxychloropropyl) dimethyl silicate compound and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1 In a 250ml four-necked flask equipped with a stirrer, a thermometer and a condenser tube, replace the air in the bottle with nitrogen, and add 38.75g (0.1mol) of 2,4,6-tribromophenylepoxypropyl Ether and 100ml of benzene, add 6.45g (0.05mol) dimethyl dichlorosilane dropwise, control the reaction temperature not higher than 40°C at the rate of addition, raise the temperature to 70°C after dropping, keep the reaction for 10h, and distill off the solvent and A small amount of low-boilers gave bis(2,4,6-tribromophenoxychloropropyl) dimethyl silicate with a yield of 95.3%.

Embodiment 2

[0028] Example 2 In a 250ml four-neck flask equipped with a stirrer, a thermometer and a condenser tube, replace the air in the bottle with nitrogen, and add 38.75g (0.1mol) of 2,4,6-tribromophenylepoxypropyl Ether and 70ml xylene, add 6.45g (0.05mol) dimethyldichlorosilane dropwise, control the reaction temperature not higher than 40°C with the dropping speed, raise the temperature to 100°C 1h after the drop, keep the reaction for 6h, and distill under reduced pressure to remove Solvent and a small amount of low-boiling-point substances were used to obtain bis(2,4,6-tribromophenoxychloropropyl) dimethyl silicate with a yield of 97.8%.

Embodiment 3

[0029] Example 3 In a 250ml four-necked flask equipped with a stirrer, a thermometer and a condenser, replace the air in the bottle with nitrogen, and add 38.75g (0.1mol) of 2,4,6-tribromophenylepoxypropyl Ether and 120ml xylene, add 6.45g (0.05mol) dimethyldichlorosilane dropwise, control the reaction temperature not higher than 40°C at the rate of addition, raise the temperature to 95°C 1h after the drop, keep the reaction for 7h, and distill under reduced pressure to remove Solvent and a small amount of low-boiling-point substances were used to obtain bis(2,4,6-tribromophenoxychloropropyl) dimethyl silicate with a yield of 97.1%.

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Abstract

The invention relates to a bis(2,4,6-tribromophenoxychloropropyl) dimethyl silicate compound and a preparation method thereof. The structure of the compound is shown in the following formula: where m=1, n =0, m=0 when n=1. The preparation method is: in a reactor equipped with a stirrer, a thermometer and a condenser tube, replace the air in the reactor with nitrogen, dissolve 2,4,6-tribromophenyl glycidyl ether in an organic solvent, Add 0.5 times mole of dimethyldichlorosilane dropwise, react at 70°C~100°C for 6~10h after dropping, and obtain dimethylsilicate bis(2,4,6-tribromophenoxy chloropropyl) ester. The flame retardant of the present invention has high flame retardant efficiency and good compatibility with materials, is suitable for use as a flame retardant for polyvinyl chloride, polyester, epoxy resin, unsaturated resin, etc., and has simple production process, low cost and easy realization Industrial production.

Description

technical field [0001] The present invention relates to a kind of synergistic flame retardant dimethyl silicate bis(2,4,6-tribromophenoxychloropropyl) ester compound of silicon, bromine and chlorine and a preparation method thereof, the compound is suitable for use as Flame retardant for polyvinyl chloride, polyester, epoxy resin, unsaturated resin, etc. Background technique [0002] With the rapid development of science and technology in the world, the continuous improvement of people's living standards and the enhancement of safety and fire prevention awareness, the flame retardant industry has developed rapidly. Since the European Union announced in 1986 that polybrominated diphenyl ether flame retardants produced carcinogenic substances when burned, the use of halogenated flame retardants has been restricted to a certain extent. However, due to the excellent comprehensive cost performance of halogenated flame retardants, and it is difficult to find ideal substitutes, it...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F7/18C08K5/5419C08L27/06
Inventor 王彦林杨海军
Owner HUZHOU RUIGAO NEW MATERIALS CO LTD
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