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BPS product and all-bromine preparation method thereof

A product, the technology of bromochloromethane, is applied in the field of preparation of BPS products and its perbromine method, which can solve the problems of reducing entrained solvents in separated products, inability to solve product quality problems, and limitations in application fields, and achieve significant economic and social benefits , few process steps, short reaction cycle

Active Publication Date: 2019-04-30
山东旭锐新材股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The Chinese patent with the application number 200910070904.0 provides a preparation method of brominated polystyrene, which adopts high-speed stirring equipment that generates high shear force, and uses high shear force to break large droplets into small droplets, reducing separation The solvent entrained in the product, the bromine content of the separated solid brominated polystyrene is 66%-69%, and the temperature can reach above 320°C when the thermal weight loss rate is 1%, but it still cannot solve the product quality problem, and the product color is more than ordinary The product has been improved and lightened, but it is very easy to yellow, and its application field is still limited

Method used

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Embodiment 1

[0031] Embodiment 1: the preparation method of the perbromine method of a kind of BPS product

[0032] The preparation method of the perbromine method of a kind of BPS product of the present embodiment may further comprise the steps:

[0033] Step 1. Raw material preparation:

[0034] Preparation of anhydrous bromochloromethane: put 360g of bromochloromethane in a four-neck flask, add 1.5g of phosphorus pentoxide, stir for 5-6 hours, and check that the water content is less than 0.03%.

[0035] Step 2, dissolving material:

[0036] Add 10g PS and 190g bromochloromethane into the four-neck flask, cool down to 0-5°C, add 0.5g aluminum trichloride and 0.5g titanium tetrachloride, and stir evenly.

[0037] Step 3, bromination reaction:

[0038] Weigh 40g of bromine and add it dropwise to a four-necked flask. During the dropping process, the temperature does not exceed 5°C. After the dropwise addition, the temperature is raised to 5-10°C and kept for 3 hours;

[0039] After the...

Embodiment 2

[0043] Embodiment 2: the preparation method of the full bromine method of a kind of BPS product

[0044] The preparation method of the perbromine method of a kind of BPS product of the present embodiment may further comprise the steps:

[0045] Step 1. Raw material preparation:

[0046] Preparation of anhydrous bromochloromethane: put 360g of bromochloromethane in a four-neck flask, add 1.5g of phosphorus pentoxide, stir for 5-6 hours, and check that the water content is less than 0.03%.

[0047] Step 2, dissolving material:

[0048] Add 10g PS and 190g bromochloromethane into the four-neck flask, cool down to 0-5°C, add 0.5g aluminum trichloride, 0.25g synergistic dispersant and 0.5g titanium tetrachloride, and stir evenly.

[0049] Described synergistic dispersant is made up of ferrotungsten powder, magnesium stearate and ionic liquid, and its mass ratio is 1:0.18:10;

[0050] In the tungsten iron powder, the mesh number is 100 mesh, tungsten 82.0%, carbon 0.3%, phosphoru...

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Abstract

The invention discloses an all-bromine preparation method of a BPS (brominated polystyrene) product. The method comprises the following processes: raw material preparation, material dissolving, a bromination reaction and post-treatment, wherein the material dissolving process includes the steps of addition of 10 g of PS and 190 g of bromochloromethane into a four-necked flask, cooling to 0-5 DEG C, addition of 0.5 g of aluminum trichloride and 0.5 g of titanium tetrachloride, and uniform stirring. The invention also provides the BPS product. The product has a white or pale yellow appearance, the chlorine content of the product is 0, 1% of the product is decomposed at a TGA temperature of 350 DEG C, 5% of the product is decomposed at a TGA temperature of 380 DEG C, the bromine content is equal to or more than 66%, and the thermal decomposition temperature is equal to or more than 270 DEG C. The all-bromine preparation method has the advantages of no bromine chloride preparation process,few flow steps, short reaction cycle, no deep refrigeration and low energy consumption; and the product is free from chlorine, and has a good thermal stability, and members produced from the producthave good color and high quality, so the application field of the product is enlarged, and great economic and social benefits are achieved.

Description

technical field [0001] The invention relates to the technical field of fine chemicals, in particular to a BPS product and a preparation method thereof by a perbromine method. Background technique [0002] As an additive brominated flame retardant, brominated polystyrene (BPS) has the advantages of large molecular weight, high bromine content and good thermal stability, and has good dispersibility and compatibility in polymers, and is easy to process , no frosting, its thermal decomposition temperature is greater than 270°C, it is an ideal flame retardant for PET, ABS, nylon and other thermoplastic engineering resin processing. In addition, brominated polystyrene does not release carcinogens such as dioxins when burned, and is a substitute for polybrominated diphenyl ethers (PBDEs) flame retardants. [0003] The Chinese patent with the application number 200910070904.0 provides a preparation method of brominated polystyrene, which adopts high-speed stirring equipment that ge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F8/20C08F112/08
CPCC08F8/20C08F112/08
Inventor 王强杨凯张荣华陶书伟杨振振杨国军王慧
Owner 山东旭锐新材股份有限公司
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