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Conjugated diene polymer, preparation method therefor and styrene-butadiene rubber

A technology of conjugated diene and styrene-butadiene rubber, which is applied in the field of rubber processing aids

Active Publication Date: 2019-10-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, due to the defects of silica in electrostatic conduction, an appropriate amount of carbon black must be compounded in tires, so tires still use silica and carbon black to reinforce the rubber matrix, so look for a method that can promote silica at the same time. The processing aids of black and carbon black dispersed in rubber are particularly important

Method used

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  • Conjugated diene polymer, preparation method therefor and styrene-butadiene rubber
  • Conjugated diene polymer, preparation method therefor and styrene-butadiene rubber
  • Conjugated diene polymer, preparation method therefor and styrene-butadiene rubber

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preparation example Construction

[0039] The second aspect of the present invention provides a method for preparing the above-mentioned conjugated diene polymer, the method comprising:

[0040] (1) in an organic solvent, in the presence of an organolithium initiator and an optional structure regulator, anionic polymerization of the conjugated diene monomer and the optional monovinylarene monomer;

[0041] (2) In the presence of a free radical initiator, the product of the anionic polymerization reaction and the modifying agent are subjected to a free radical polymerization reaction.

[0042] According to the present invention, the conjugated diene monomer, monovinylarene monomer and modifier are as described above, and the present invention will not repeat them here, wherein, the method will make the obtained conjugated diene polymerized as described above. The amount of the conjugated diene monomer and the monovinylarene monomer will be such that, in the conjugated diene polymer obtained by the method, the s...

preparation example 1

[0065]Under high-purity nitrogen protection, 2310g cyclohexane, 62.6g styrene and 249.8g butadiene are mixed, then add tetrahydrofurfuryl alcohol ethyl ether (relative to the total amount of cyclohexane, styrene and butadiene of 1000g, The amount of tetrahydrofurfuryl alcohol ethyl ether is 450mg), and 1.7mmol of n-butyllithium was added at 50°C to initiate the reaction, and reacted at 50°C for 60 minutes. After the end, half the weight of the glue was taken as the styrene-butadiene rubber base liquid A1 , after the remaining glue was condensed by water vapor, the styrene-butadiene rubber sample B1 was obtained.

preparation example 2

[0067] Under the protection of high-purity nitrogen, mix 2310g cyclohexane, 62.6g styrene, 117.8g isoprene and 127.7g butadiene, then add tetrahydrofurfuryl butyl ether (relative to 1000g cyclohexane, styrene , the total amount of isoprene and butadiene, the amount of tetrahydrofurfuryl butyl ether is 210mg), at 60 ° C, 2.17 mmol of n-butyllithium was added to initiate, and reacted at 60 ° C for 60 minutes, and then added 0.22 One mmol of tin tetrachloride was reacted at 60°C for 20 minutes. After the completion of the reaction, half the weight of the glue was taken as the styrene-butadiene rubber base liquid A2, and the remaining glue was condensed by water vapor to obtain the styrene-butadiene rubber sample B2.

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Abstract

The invention relates to the field of rubber processing aids and particularly relates to a conjugated diene polymer, a preparation method therefor, styrene-butadiene rubber and vulcanizate. The conjugated diene polymer contains a structure provided by a conjugated diene monomer and an optional structure provided by a mono-vinyl arene monomer, and a lateral group provided by a modifier is connectedwith a molecular chain of the conjugated diene polymer. The conjugated diene polymer provided by the invention can enable white carbon black and carbon black to be excellently dispersed in the styrene-butadiene rubber, the content of macro-aggregated particulate matters in formed vulcanizate is relatively low, and a reinforcing effect on the white carbon black and carbon black is convenient to provide.

Description

technical field [0001] The invention relates to the field of rubber processing aids, in particular to a conjugated diene polymer, a preparation method thereof and styrene-butadiene rubber. Background technique [0002] Replacing carbon black with silica as a reinforcing agent for tire tread rubber materials can effectively reduce the rolling resistance of tires, reduce fuel consumption of automobiles, and improve wet skid resistance, but silica is difficult to disperse in non-polar rubber. It makes it difficult to fill a large amount of silica in rubber. In order to improve the dispersion of silica in rubber, people have done a lot of work, such as adding silica dispersant to improve the dispersion of silica in rubber, using highly dispersible silica instead of ordinary silica, The purpose of direct chemical surface modification of silica, etc., is to weaken the agglomeration of silica itself and increase its dispersion in rubber. But so far, due to the defects of silica i...

Claims

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Application Information

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IPC IPC(8): C08F236/10C08F212/08C08L9/06C08L15/00C08K3/04C08K3/36
CPCC08F236/10C08L9/06C08F212/08C08L15/00C08K3/04C08K3/36
Inventor 王妮妮刘辉康新贺孙文娟
Owner CHINA PETROLEUM & CHEM CORP