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Production process of brominated SBS

A production process and bromination technology, applied in the production process of brominated SBS, can solve the problems of restricting the large-scale production and general application of brominated SBS, unable to meet the use requirements, poor thermal stability, etc., and achieve low cost and easy control , Improve the effect of thermal stability

Inactive Publication Date: 2020-05-08
山东东信新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still some problems in the production process of brominated SBS, such as low bromine content, low yield, poor thermal stability, etc., which make it unable to meet the needs of use, thus limiting the large-scale production and universal application of brominated SBS

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A production technique of brominated SBS, comprising the following steps:

[0018] (1) Add SBS and isobutanol into the reaction kettle, raise the temperature to 20°C, stir and maintain this temperature until the materials are completely dissolved;

[0019] (2) Add sodium bromide, feed oxidant chlorine, and milk of lime is equipped with at the end of the reaction kettle to absorb the unreacted chlorine of the reaction kettle, and no longer rise after raising the temperature to 60°C;

[0020] (3) Cool down to 20°C, add a catalyst, continue to heat up to 75°C for 1 hour, and the catalyst is tin tetrachloride and ferric chloride;

[0021] (4) After cooling down to room temperature, add peroxide and alkali metal alkoxide to the feed liquid after the above-mentioned reaction, the peroxide is hydrogen peroxide, and the alkali metal alkoxide is sodium methylate, warming up to 30°C, and keep warm for 2 After 1 hour, filter, wash, remove impurities, and dry to obtain the target ...

Embodiment 2

[0024] A production technique of brominated SBS, comprising the following steps:

[0025] (1) Add SBS and isobutanol into the reaction kettle, raise the temperature to 40°C, stir and maintain this temperature until the materials are completely dissolved;

[0026] (2) Add sodium bromide, feed oxidant chlorine, and milk of lime is equipped with at the end of the reaction kettle to absorb the unreacted chlorine of the reaction kettle, and no longer rise after raising the temperature to 75°C;

[0027] (3) Cool down to 20°C, add a catalyst, continue to heat up to 75°C for 1 hour, and the catalyst is tin tetrachloride and ferric chloride;

[0028] (4) After cooling down to room temperature, add peroxide and alkali metal alkoxide to the feed liquid after the above-mentioned reaction, the peroxide is hydrogen peroxide, and the alkali metal alkoxide is sodium methylate, and the temperature is raised to 40° C., kept for 2 After 1 hour, filter, wash, remove impurities, and dry to obtain...

Embodiment 3

[0031] A production technique of brominated SBS, comprising the following steps:

[0032] (1) Add SBS and isobutanol into the reaction kettle, raise the temperature to 30°C, stir and maintain this temperature until the materials are completely dissolved;

[0033] (2) Add sodium bromide, feed oxidant chlorine, and milk of lime is equipped with at the end of the reaction kettle to absorb the unreacted chlorine of the reaction kettle, and no longer rise after raising the temperature to 70°C;

[0034] (3) Cool down to 20°C, add a catalyst, continue to heat up to 75°C for 1 hour, and the catalyst is tin tetrachloride and ferric chloride;

[0035] (4) After cooling down to room temperature, add peroxide and alkali metal alkoxide to the feed liquid after the above-mentioned reaction, the peroxide is hydrogen peroxide, and the alkali metal alkoxide is sodium methylate, warming up to 35° C., and insulated for 2 After 1 hour, filter, wash, remove impurities, and dry to obtain the targe...

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PUM

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Abstract

The invention discloses a production process of brominated SBS, and belongs to the technical field of flame retardant production, and the production process comprises the following steps: adding SBS and isobutanol into a reaction kettle, heating to 20-40 DEG C, stirring, and keeping the temperature until the materials are completely dissolved; adding sodium bromide, introducing oxidizing agent chlorine, filling lime milk at the tail end of the reaction kettle to absorb unreacted chlorine in the reaction kettle, and heating to 60-75 DEG C and then stopping heating; cooling to 20 DEG C, adding acatalyst, and continuously heating to 75 DEG C to react for 1 hour, wherein the catalyst being tin tetrachloride and ferric trichloride; and cooling to room temperature, adding peroxide and alkali metal alkoxide into the material liquid after the reaction is finished, heating to 30-40 DEG C, keeping the temperature for 2 hours, filtering, washing, removing impurities, and drying to obtain the target product brominated SBS, wherein the peroxide is hydrogen peroxide, and the alkali metal alkoxide is sodium methoxide. The preparation of the brominated SBS is realized by adopting a direct bromination method, the reaction is mild, the bromine content, the yield and the thermal stability of the brominated SBS are improved, and the use requirements are met.

Description

technical field [0001] The invention relates to the technical field of flame retardant production, in particular to a production process of brominated SBS. Background technique [0002] Brominated SBS, also known as brominated styrene-butadiene-styrene triblock copolymer, is a flame retardant that can replace hexabromocyclododecane, and is used in expanded polystyrene and extruded polystyrene Novel flame retardants on ethylbenzene foam sheets. Since hexabromocyclododecane may have one or more of bioaccumulation, toxicity to aquatic plants, and persistence to the environment, and the dehydrobromination of hexabromocyclododecane becomes severe when it is above 190°C, The hazards of hydrogen bromide vapor are more significant. When used as a flame retardant, it will produce toxic and harmful fumes, and it will corrode machinery to a certain extent. However, brominated SBS flame retardant has high thermal stability and is compatible with polystyrene. The material has good comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F8/20C08F297/04
CPCC08F8/20C08F297/04
Inventor 郭安鹏叶以权王传涛曹珮如刘冰洋
Owner 山东东信新材料科技股份有限公司
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