Modified alkadiene polymer as well as preparation method and application thereof

A technology of diene polymer and conjugated diene, which is applied in the application field of modified diene polymer as rubber base rubber, can solve the problems such as the inability to effectively improve the wet skid resistance and rolling resistance of rubber.

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the defect that the existing method cannot effectively improve the relationship between the wet skid resistance and rolling resistance of rubber, and provide a modified rubber that can have both high wet skid resistance and low rolling resistance. Diene polymer, preparation method of modified diene polymer, modified diene polymer prepared by said method, and application of said modified diene polymer

Method used

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  • Modified alkadiene polymer as well as preparation method and application thereof
  • Modified alkadiene polymer as well as preparation method and application thereof
  • Modified alkadiene polymer as well as preparation method and application thereof

Examples

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preparation example Construction

[0037] The preparation method of the modified diene polymer provided by the invention comprises in an inert atmosphere and in the presence of an initiator, the diene polymer containing a monovinylarene structural unit and a conjugated diene structural unit is coupled with a silane agent contact, the conditions of the contact make the silane coupling agent chemically bonded to the diene polymer; the number average molecular weight of the diene polymer is 50,000-1 million, and the diene polymer Based on the weight of the conjugated diene structural unit in the product, the content of the conjugated diene structural unit with double bonds in the side chain in the diene polymer is 15-85% by weight, preferably 30-60% by weight, and the The silane coupling agent has the structure shown in formula (II):

[0038]

[0039] Among them, R 1 -R 4 for C 1 -C 20 straight-chain or branched-chain hydrocarbon groups or C containing heteroatoms 1 -C 20 A linear or branched hydrocarbon ...

Embodiment 1

[0072] This example is used to illustrate the modified diene polymer provided by the present invention and its preparation method.

[0073] (1) In a 5-liter stainless steel stirred tank, under the protection of high-purity nitrogen, add 2288g cyclohexane, 31.2g styrene, 112.3g butadiene and 1.1g tetrahydrofurfuryl alcohol ethyl ether, then add 1.1 mmol of n-butyllithium and the pressure was controlled at 0.2 MPa to initiate a reaction for 2 hours to obtain a solution containing a diene polymer. The number average molecular weight of the diene polymer is 182,000, and based on the weight of the conjugated diene structural unit in the diene polymer, the conjugated diene in the diene polymer contains double bonds The content of the structural unit was 43.02% by weight, the content of the styrene structural unit was 21.74% by weight, and the content of the butadiene structural unit was 78.26% by weight.

[0074] (2) Add 0.8ml (0.836g) of γ-mercaptopropyltrimethoxysilane to the pro...

Embodiment 2

[0076] This example is used to illustrate the modified diene polymer provided by the present invention and its preparation method.

[0077] (1) In a 5-liter stainless steel stirred tank, under the protection of high-purity nitrogen, add 2288g cyclohexane, 31.2g vinyl toluene, 112.32g isoprene and 0.65g tetrahydrofuran, then add 1.0mmol after heating to 45°C n-butyllithium and the pressure was controlled at 0.1MPa to initiate the reaction for 2 hours to obtain a solution containing a diene polymer, then add 0.06mmol of tin tetrachloride and react at 60°C for 30min to obtain a coupling efficiency of 27% polymer. The number average molecular weight of the diene polymer is 194,000, and based on the weight of the conjugated diene structural unit in the diene polymer, the conjugated diene in the diene polymer contains double bonds The content of the structural unit was 33.03% by weight, the content of the vinyltoluene structural unit was 21.74% by weight, and the content of the iso...

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Abstract

The invention provides a modified alkadiene polymer, a preparation method of the modified alkadiene polymer and application of the modified alkadiene polymer as base rubber. A molecular chain of the modified alkadiene polymer comprises a monovinyl aromatic hydrocarbon structure unit, a conjugated alkadiene structure unit and a silane coupling agent shown in a formula (I), wherein the number-average molecular weight of the modified alkadiene polymer is 50000-1000,000; R1-R4 is C1-C20 linear chain or branched chain alkyl or heteroatom-containing C1-C20 linear chain or branched chain alkyl; the heteroatoms are selected from one or more of halogen, oxygen, sulphur, silicon and phosphorus. The modified alkadiene polymer can be used for effectively balancing the relation between wet-skid resistance and rolling resistance and can also be used for improving unpleasant odor generated by using the silane coupling agent in the rubber mixing process. The formula (I) is as shown in the description.

Description

technical field [0001] The invention relates to a modified diene polymer, a preparation method of the modified diene polymer, a modified diene polymer prepared by the method, and an application of the modified diene polymer as a rubber base glue. Background technique [0002] In recent years, with the development of the automobile industry and rising oil prices, people have paid more and more attention to the safety and energy saving of automobiles, which requires tires to have high anti-wet skid performance and low rolling resistance. resistance. However, it is often difficult to simultaneously improve wet skid resistance and reduce rolling resistance. Therefore, according to different application requirements, it is necessary to seek the best balance between high wet skid resistance and low rolling resistance. [0003] For the production of low rolling resistance tires, because anionic solution polymerization can effectively adjust the content and glass transition temper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F236/10C08C19/44C08L15/00
CPCC08C19/20C08C19/25C08C19/44C08F36/04C08K3/04C08F8/34C08L15/00
Inventor 梁爱民徐林王妮妮康新贺姜科刘辉孙文娟李传清解希铭
Owner CHINA PETROLEUM & CHEM CORP
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