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A brominated SBS product with narrow molecular weight distribution and high thermal stability and preparation method thereof

A technology with narrow molecular weight distribution and high thermal stability, applied in the field of fine chemicals, can solve the problems of affecting the conversion rate of the reaction, block curling, slowing down the reaction, etc., and achieve the effect of being conducive to popularization and application, stable raw materials and low cost

Active Publication Date: 2021-07-30
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

More importantly, due to the large molecular weight of the new substance, the blocks will curl and entangle, and it is easy to embed the reactants in the polymer, forcing the reaction to slow down or even stop due to inaccessibility, which directly affects The conversion rate of the reaction, at present, there is no relevant report on this method well at home and abroad.

Method used

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  • A brominated SBS product with narrow molecular weight distribution and high thermal stability and preparation method thereof
  • A brominated SBS product with narrow molecular weight distribution and high thermal stability and preparation method thereof
  • A brominated SBS product with narrow molecular weight distribution and high thermal stability and preparation method thereof

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Embodiment 1

[0036] Embodiment 1: A brominated SBS product with narrow molecular weight distribution and high thermal stability and its preparation method

[0037] The preparation method of brominated SBS of a kind of narrow molecular weight distribution high thermal stability of the present embodiment, comprises the following steps:

[0038] 1. Mixing: TBAB and Br 2 Add 25.64g of the mixture and DCM 100g into a 250ml Erlenmeyer flask, observe the temperature and phenomenon, and form material ① (burgundy tetrabutylammonium tribromide);

[0039] The TBAB and Br 2 The molar ratio is 1:1.

[0040]

[0041] 2. Dissolution: Add 5g of SBS and 100g of DCM (determined according to the solubility of Br-SBS) into a 500ml four-necked bottle, and dissolve at room temperature;

[0042] 3. Dropping: After the SBS is dissolved, add the equimolar material ① dropwise at a temperature lower than 10°C, and the dropping rate is completed within one hour;

[0043] 4. End the reaction: After the dropwise...

Embodiment 2

[0048] Embodiment 2 A brominated SBS product with narrow molecular weight distribution and high thermal stability and preparation method thereof

[0049] 1. Weigh 25.64g of the mixture of TBAB (tetrabutylammonium bromide) and bromine at a molar ratio of 1:1 and add DCM100g into a 250ml Erlenmeyer flask, observe the temperature and phenomenon; form the material ①.

[0050] 2. Preparation of SBS miniemulsion:

[0051] 1) Add 5g of commercially available SBS and 100g of DCM into a 500ml four-necked bottle, and the dissolution temperature is room temperature;

[0052] In the present embodiment, described commercially available SBS, molecular formula is (C 6 h 5 C 2 h 3 )m(C 4 h 6)n, where m:n=3:7;

[0053] 2) Add 0.2g co-stabilizer to the above-mentioned commercially available SBS solution, place it under a magnetic stirrer to stir, add 0.1g calcium carbonate powder, disperse and grind until D90≤0.75um, and conduct ultrasonic-ultraviolet synergistic treatment under nitrogen...

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Abstract

The invention provides a brominated SBS product with a narrow molecular weight distribution and high thermal stability and a preparation method thereof, comprising the following steps: mixing, dissolving, adding dropwise, terminating the reaction and separating, and extracting; said mixing, TBAB and Br 2 The mixture 25.64g and DCM 100g are mixed, obtain material; The TBAB and Br 2 The mol ratio is 1:1, the obtained brominated SBS product of the method of the present invention, 1% thermogravity loss temperature is 230 ℃, 5% thermogravity loss 245 ℃, 10% thermogravity loss 255 ℃, 50% thermogravity loss 280 ℃, bromine The content is 66%. The preparation method of the present invention has stable and easy-to-obtain raw materials, simple process, easy operation, and low cost, which is conducive to popularization and application, and can effectively reduce or eliminate the content of polymers and ultra-high molecular polymers in the copolymer , greatly improving the purity of brominated SBS products, and improving the comprehensive physical and mechanical properties of brominated SBS copolymers.

Description

technical field [0001] The invention relates to the technical field of fine chemicals, in particular to a brominated SBS product with narrow molecular weight distribution and high thermal stability and a preparation method thereof. Background technique [0002] Brominated flame retardants have good flame retardant effects, light stability and antistatic properties, and are widely used in various plastics such as polyolefins, polyamides and polystyrene, fibers and synthetic rubber materials such as silicone rubber. Among them, the content of bromine element in the flame retardant system is an important parameter to evaluate the flame retardant performance of brominated flame retardants, and its size directly affects the quality of the product and the flame retardant effect. [0003] Brominated SBS, that is, brominated styrene-butadiene block copolymer, as a new environmentally friendly brominated flame retardant, is widely used in waterproof membranes and various plastic shee...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F297/04C08F8/20
Inventor 王良民王强陶书伟张荣华王光照赵琳
Owner 山东旭锐新材股份有限公司
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