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Flame-retardant plasticizer dihalopropyl dimethyl silicate compound and preparation method thereof

A technology of dihalopropyl dimethylsilicate and dimethyldibromosilane is applied in the field of flame retardant plasticizers, which can solve problems such as application limitations, and achieve simple equipment, low product viscosity and good compatibility. Effect

Active Publication Date: 2017-10-17
HUZHOU RUIGAO NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, halogenated flame retardants are one of the organic flame retardants with the largest output in the world, but their application in some fields is limited due to the release of harmful gases during combustion.

Method used

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  • Flame-retardant plasticizer dihalopropyl dimethyl silicate compound and preparation method thereof
  • Flame-retardant plasticizer dihalopropyl dimethyl silicate compound and preparation method thereof
  • Flame-retardant plasticizer dihalopropyl dimethyl silicate compound and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1 In a 250ml four-necked bottle equipped with a stirrer, a thermometer and a condenser, and a drying tube at the top of the condenser, replace the air in the bottle with nitrogen, and add 6.45g (0.05mol) of dimethyl Dichlorosilane, 65ml of dioxane and 9.25g (0.1mol) of epichlorohydrin, heated up to 100°C, kept warm for 8h; distilled under reduced pressure to remove solvent and a small amount of low-boiling matter to obtain dichloropropane dimethyl silicate Esters, yield 86.9%.

Embodiment 2

[0028] Example 2 In a 250ml four-necked bottle equipped with a stirrer, a thermometer and a condenser tube, and a drying tube on the top of the condenser tube, replace the air in the bottle with nitrogen, and add 6.45g (0.05mol) of dimethyl Dichlorosilane, 40ml of acetonitrile and 10.18g (0.11mol) of epichlorohydrin were heated up to 70°C and kept for 13 hours of reaction; the solvent, excess epichlorohydrin (recycled) and a small amount of low boiling point were removed by distillation under reduced pressure to obtain Dichloropropyl dimethyl silicate, yield 84.1%.

Embodiment 3

[0029] Example 3 In a 250ml four-necked bottle equipped with a stirrer, a thermometer and a condenser tube, and a drying tube on the top of the condenser tube, replace the air in the bottle with nitrogen, and add 6.45g (0.05mol) of dimethyl Dichlorosilane, 20ml diethylene glycol dimethyl ether, and 11.57g (0.125mol) epichlorohydrin, heated up to 110°C, and kept warm for 5h; the solvent, excess epichlorohydrin (recycled) and A small amount of low-boiling matter was used to obtain dichloropropyl dimethyl silicate with a yield of 91.2%.

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Abstract

The invention relates to a flame retardant plasticizer dihalopropyl dimethyl silicate compound and a preparation method thereof. The structure of the compound is shown in the following formula: in the formula, ClXC3H5O is CH2ClCHXCH2O or (CH2Cl)(CH2X)CHO, X= Cl or Br. The preparation method is as follows: dissolve dimethyldihalosilane in an organic solvent, add epichlorohydrin 2 to 3 times the mole of dimethyldihalosilane, raise the temperature to 70°C to 110°C, and keep the temperature for 5 to 13 hours. After purification, dihalopropyl dimethyl silicate can be obtained. The dihalopropyl dimethylsilicate of the present invention has high flame retardant efficiency and good plasticity, and is suitable for use as a flame retardant plasticizer for polyvinyl chloride, polyurethane, epoxy resin, unsaturated resin, etc., and the production process is simple and the cost is low. Low, easy to realize industrial production.

Description

technical field [0001] The invention relates to a silicon and halogen synergistic flame retardant plasticizer dihalopropyl dimethyl silicate compound and a preparation method thereof. The compound is suitable for use as a compound for polyvinyl chloride, polyurethane, epoxy resin, unsaturated resin, etc. Flame retardant plasticizer. Background technique [0002] With the continuous development of my country's social economy and the rapid growth of social wealth, the rapid development of electronic appliances, high-rise buildings and other fields, the incidence of fires has increased, causing huge losses of life and property, thus promoting the rapid development of flame retardant science and industry. develop. At present, halogenated flame retardants are one of the most produced organic flame retardants in the world, but their application in some fields is limited due to the release of harmful gases when burned. At the same time, in terms of overall cost performance, it is ...

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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