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Brominated polymer flame retardant and preparation method thereof

A technology of brominated polymers and flame retardants, applied in the field of green brominated polymer flame retardants and its preparation, can solve the problem of poor fire resistance of polystyrene foam boards and poor thermal stability of hexabromocyclododecane , aquatic organisms and environmental hazards, etc., to avoid bromine substitution, facilitate biodegradation, and reduce the difficulty of post-processing

Inactive Publication Date: 2017-07-14
天津天盈新型建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] As an additive flame retardant, hexabromocyclododecane is currently added in an amount of 2% to polystyrene on the market. Since hexabromocyclododecane can diffuse into the environment through production, use and waste disposal, It has become a widespread pollutant in the environment; the thermal stability of hexabromocyclododecane is poor, and the dehydrobromination becomes severe above 190°C, and hydrogen bromide gas will cause great harm to aquatic organisms and the environment ; The fire resistance of polystyrene plastic foam boards will also deteriorate over time, which will bring safety hazards to buildings in our country, which is inconsistent with the new concepts of building energy saving and consumption reduction and green buildings advocated by today's society

Method used

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  • Brominated polymer flame retardant and preparation method thereof
  • Brominated polymer flame retardant and preparation method thereof
  • Brominated polymer flame retardant and preparation method thereof

Examples

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Effect test

Embodiment 1

[0037] 5g styrene-butadiene copolymer (abbreviated as SBS, butadiene content is 60%) was dissolved in 120ml chloroform solvent to form solution A, while stirring under 0 ℃ ice-water bath conditions, 25.3ml of Bromine-chloroform solution (wherein the volume ratio of bromine in the bromine-chloroform solution to chloroform is 1:10) is slowly added dropwise to solution A at a speed of 1d / 2s, dropwise After completion, keep the reaction at 0°C for 2h, raise the temperature to 25°C for 1h, raise the temperature to 50°C for 1h, raise the temperature to 75°C for 2h, then cool down to room temperature for 20min, use methanol as the anti-solvent for precipitation, and filter the precipitate Afterwards, repeat the process of dissolving-anti-solvent method precipitation-filtering until the off-white precipitate is obtained, which is styrene-butadiene brominated copolymer (abbreviation Br-SBS), and the obtained Br-SBS is vacuum-dried to remove residual solvents and anti-solvents.

Embodiment 2

[0039]5g styrene-butadiene copolymer (abbreviated as SBS, butadiene content is 60%) was dissolved in 120ml chloroform solvent to form solution A, while stirring under 0 ℃ ice-water bath conditions, 38.5ml of Bromine-chloroform solution (wherein the volume ratio of bromine in the bromine-chloroform solution to chloroform is 1:10) is slowly added dropwise to solution A at a speed of 1d / 2s, dropwise After completion, react for 2 hours, raise the temperature to 25°C for 1 hour, raise the temperature to 50°C for 1 hour, raise the temperature to 75°C for 2 hours, then naturally lower the temperature to room temperature for 20 minutes, use methanol as the anti-solvent for precipitation, filter the precipitate, and repeat Dissolving-anti-solvent method precipitation-filtering process until the off-white precipitate is obtained, which is styrene-butadiene brominated copolymer (abbreviated as Br-SBS), and the obtained Br-SBS is vacuum-dried to remove residual solvent and anti-solvent. ...

Embodiment 3

[0041] 5g styrene-butadiene copolymer (abbreviated as SBS, butadiene content is 60%) was dissolved in 120ml chloroform solvent to form solution A, while stirring under 0°C ice-water bath conditions, 50.6ml of Bromine-chloroform solution (wherein the volume ratio of bromine in the bromine-chloroform solution to chloroform is 1:10) is slowly added dropwise to solution A at a speed of 1d / 2s, dropwise After completion, react for 2 hours, raise the temperature to 25°C for 1 hour, raise the temperature to 50°C for 1 hour, raise the temperature to 75°C for 2 hours, then naturally lower the temperature to room temperature for 20 minutes, use methanol as the anti-solvent for precipitation, filter the precipitate, and repeat Dissolving-anti-solvent method precipitation-filtering process until the off-white precipitate is obtained, which is styrene-butadiene brominated copolymer (abbreviated as Br-SBS), and the obtained Br-SBS is vacuum-dried to remove residual solvent and anti-solvent. ...

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Abstract

The invention provides a brominated polymer flame retardant and a preparation method thereof and belongs to the field of chemical and constructing material flame retardants. The preparation method comprises the following steps: at 0 DEG C, dripping a certain ratio of diluted bromine into a styrene-butadiene copolymer solution; and reacting by adopting a specific temperature rising mechanism to finally prepare the target brominated polymer flame retardant. The brominated polymer flame retardant provided by the invention has good compatibility with a polystyrene material, a high oxygen index and a good flame retarding effect; the preparation method provided by the invention is simpler and bromine is directly used for carrying out bromine addition, so that introduction of other impurities and byproducts is effectively avoided; and the difficulty of post-treatment is reduced and the cost of a whole synthesizing process is reduced.

Description

technical field [0001] The invention belongs to the field of flame retardants for chemical industry and building materials, and in particular relates to a heat-stable, non-toxic and non-bioaccumulative green brominated polymer flame retardant applied to polystyrene plastics Agents and their preparation methods. Background technique [0002] In recent years, my country has entered the era of building energy conservation and environmental protection, which has brought unprecedented opportunities to my country's building insulation materials. The market demand for polystyrene foam (PS) has continued to expand, but PS foam is a flammable material, and its limiting oxygen index It is only 18%. It decomposes to produce styrene monomer, styrene dimer and hydrocarbons (such as benzene, low alkyl benzene and a small amount of aromatic compounds) after being exposed to fire. It has a high calorific value. In addition, PS foam When plastic is burned, it is easy to produce molten droplet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F8/22C08F236/10C08L47/00C08L25/06C08L53/02C08F287/00
CPCC08F8/22C08F2800/20C08L25/06C08L2201/02C08L2201/08C08F236/10C08L47/00C08F287/00C08L53/025
Inventor 杨倩张鹏宇刘彤滕藤毛志毅李桂燕王冬梅刘凤东白锡庆
Owner 天津天盈新型建材有限公司
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