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Preparation method of epoxy-terminated functionalized solution polymerized styrene-butadiene rubber

A solution-polymerized styrene-butadiene rubber, functionalization technology, applied in the field of rubber, can solve the problems of difficulty in realizing solution-polymerized styrene-butadiene rubber chain end functionalization, low cost, increasing price, etc.

Active Publication Date: 2021-04-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, solution-polymerized styrene-butadiene rubber is mainly obtained through anionic polymerization, but the presence of organolithium compounds is more dangerous, and the price is increasing year by year, and it is difficult to realize the chain end functionalization of solution-polymerized styrene-butadiene rubber. People turn their attention to cost Low, less hazardous free radical polymerization as an alternative to traditional anionic polymerization methods

Method used

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  • Preparation method of epoxy-terminated functionalized solution polymerized styrene-butadiene rubber
  • Preparation method of epoxy-terminated functionalized solution polymerized styrene-butadiene rubber
  • Preparation method of epoxy-terminated functionalized solution polymerized styrene-butadiene rubber

Examples

Experimental program
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Effect test

Embodiment example 1

[0016] Take dioxane (40.00mL), styrene (7.00g), butadiene (5.00g), RAFT reagent (BODAAT, 0.33g), di-tert-butyl peroxide (0.024g) into 100mL stainless steel high temperature In a high-pressure reactor, the reactor headspace is filled with N 2 Rinse 3 times, degas the solution three times, and place the reactor in N 2 Lower seal. The reactor was heated at 95°C for 30 hours with stirring. After completion of the reaction, the reaction mixture was precipitated into methanol (600.00 mL). Use a 15,000-rpm centrifuge to separate the polymer, and dry it in a vacuum oven (25°C, 0.70kPa) to a constant mass to obtain a double-end epoxy-functionalized solution-polymerized styrene-butadiene with a mass fraction of 23% and a molecular weight of 2300. rubber.

Embodiment example 2

[0018] Get tetrahydrofuran (40.00mL), styrene (11.45g), butadiene (5.00g), RAFT reagent (BODAAT, 0.0975g), azobisisobutyronitrile (0.027g) join in the reactor, the reactor Headspace with N 2 Rinse 3 times, degas the solution three times, and place the reactor in N 2 Lower seal. The reactor was heated at 70° C. for 50 hours with stirring. After completion of the reaction, the reaction mixture was precipitated into methanol (600.00 mL). Use a 15,000-rpm centrifuge to separate the polymer, and dry it in a vacuum oven (25°C, 0.70kPa) to a constant mass to obtain an epoxy-functionalized solution-polymerized styrene-butadiene with a mass fraction of styrene of 65% and a molecular weight of 2,0000 rubber.

Embodiment example 3

[0020] Take dioxane (40.00mL), styrene (0.067mol), butadiene (0.092mol), RAFT reagent (0.836mmol), and azobisisobutyronitrile (0.164mmol) into a 100mL stainless steel high temperature and high pressure reactor , the reactor headspace was filled with N 2 Rinse 3 times, degas the solution three times, and place the reactor in N 2 Lower seal. The reactor was heated at 95°C for 30 hours with stirring. After completion of the reaction, the reaction mixture was precipitated into methanol (600.00 mL). Use a 15,000-rpm centrifuge to separate the polymer, and dry it in a vacuum oven (25°C, 0.70kPa) to a constant mass to obtain a single-end epoxy-functionalized solution-polymerized styrene-butadiene with a mass fraction of 23% and a molecular weight of 2100 rubber.

[0021] The above-mentioned preparation method selects the xanthate RAFT reagent whose single end is an epoxy group.

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Abstract

The invention discloses a preparation method of an epoxy-terminated functionalized solution polymerized styrene-butadiene rubber, and belongs to the technical field of rubbers. The preparation method is characterized in that styrene butadiene is controlled to be copolymerized in a solution by using an RAFT reagent to obtain single epoxy-terminated or double epoxy-terminated solution polymerized styrene-butadiene rubber, wherein the solution polymerized styrene-butadiene rubber with the molecular weight ranging from 1000 to 25000 can be obtained by changing the feeding ratio of the two monomers to the RAFT reagent, and the solution polymerized styrene-butadiene rubber with the styrene mass fraction ranging from 15% to 85% can be obtained by changing the feeding ratio of styrene to butadiene. According to the method, the solution polymerized styrene-butadiene rubber with different molecular weights and different chain segment structures can be simply obtained through RAFT polymerization, and the problem that chain end functionalization is difficult to achieve in the preparation process of the solution polymerized styrene-butadiene rubber is well solved.

Description

technical field [0001] The invention discloses a preparation method of single-end or double-end epoxy group-terminated solution-polymerized styrene-butadiene rubber, which belongs to the technical field of rubber. Background technique [0002] Solution-polymerized styrene-butadiene rubber has the advantages of low heat generation, low shrinkage, fast vulcanization speed, low rolling resistance, excellent wet skid resistance and wear resistance. It is widely used in high-performance tires such as volume tires. At present, solution-polymerized styrene-butadiene rubber is mainly obtained through anionic polymerization, but there is a great risk of organolithium compounds, and the price is increasing year by year, and it is difficult to realize the chain end functionalization of solution-polymerized styrene-butadiene rubber. People turn their attention to cost Low, less hazardous free radical polymerization is used as an alternative to traditional anionic polymerization methods...

Claims

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Application Information

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IPC IPC(8): C08F212/08C08F236/10C08F2/38C08L9/06C08L9/00C08K13/06C08K9/06C08K9/04C08K7/26
CPCC08F212/08C08F236/10C08F2/38C08L9/06C08F2438/03C08L2205/025C08L2205/03C08L9/00C08K13/06C08K9/06C08K9/08C08K7/26Y02T10/86
Inventor 冯岸超孙连伟高丙轮王雪徐林张立群
Owner CHINA PETROLEUM & CHEM CORP
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