Block copolymer and block copolymer composition and its preparation method and vulcanized rubber and application and tire tread and tire

A technology of block copolymer and composition, applied in tire tread and tire field, can solve the problems of rubber with poor wet skid resistance, high rolling resistance and poor wet skid resistance.

Active Publication Date: 2021-08-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Studies have shown that there are obvious contradictions between the different properties of various general-purpose tread rubbers. Rubber with low rolling resistance and good wear resistance has poor wet skid resistance, and vice versa. No general-purpose rubber can meet these comprehensive requirements at the same time.
[0006] Of the various general-purpose rubbers currently used, butadiene rubber is the most flexible, with low rolling resistance, but poor wet skid resistance; natural rubber is moderately flexible, with good rolling resistance, but general wet skid resistance; Styrene butadiene rubber with higher ethylene content has superior wet skid resistance, but greater rolling resistance
[0007] In order to try to balance the relationship between various properties, most of the different rubber types are used together. This mechanical blending method leads to the separation of the blended phases, which affects the dispersion of various additives, the vulcanization of rubber and the final performance.

Method used

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  • Block copolymer and block copolymer composition and its preparation method and vulcanized rubber and application and tire tread and tire
  • Block copolymer and block copolymer composition and its preparation method and vulcanized rubber and application and tire tread and tire
  • Block copolymer and block copolymer composition and its preparation method and vulcanized rubber and application and tire tread and tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0131] (1) Under the protection of high-purity nitrogen, add 2200g cyclohexane and 121g isoprene successively to a 5L batch polymerization reactor equipped with an anchor stirrer, start stirring, heat the circulating water bath to 55°C, and pour Add 2.4mL of n-butyl lithium solution (1.0M hexane solution, the same below) to initiate the polymerization reaction, react at 80°C for 30min (monomer conversion rate is more than 99% by weight), and obtain the first compound containing isoprene block. Polymer mixture.

[0132] (2) Add 4.8mL divinylbenzene hexane solution (mass concentration is 80.32%, wherein, the mass concentration of p-DVB is 26.2%, the mass concentration of m-DVB is 54.12% in the reactor, purchased from Bailingwei Reagent Co., Ltd., dilute the commercially available solution to 0.4M for use, the same below), and react at 60°C for 30 minutes to obtain the second polymerization mixture.

[0133] (3) Add 2.4mL tetrahydrofuran (THF) and 1.4mL potassium tert-amyloxide ...

Embodiment 2

[0137] (1) Add 2200g of cyclohexane, 0.5mL of tetrahydrofuran and 161g of isoprene to a 5L batch polymerization reactor equipped with an anchor stirrer under the protection of high-purity nitrogen, start stirring, and heat to 60°C in a circulating water bath. Add 2.7 mL of n-butyllithium solution into the reactor to initiate the polymerization reaction, and react at 70° C. for 30 minutes (the monomer conversion rate is above 99% by weight), to obtain the first polymerization mixed liquid containing isoprene block.

[0138] (2) Add 5.4 mL of a hexane solution of divinylbenzene into the reactor and react at 80° C. for 20 min to obtain a second polymerization mixture.

[0139] (3) Add 2.9mL THF and 1.8mL t-AmOK hexane solution in the reactor, then add 267g butadiene, isoprene and styrene mixed monomer (wherein, butadiene 107g, isoprene 93g, styrene 67g, use butyllithium solution to break impurities outside the kettle); polymerize at 80°C for 90min (monomer conversion rate is more...

Embodiment 3

[0143] (1) Add 2200g of cyclohexane, 0.2mL of tetrahydrofuran and 156g of isoprene to a 5L batch polymerization reactor equipped with an anchor stirrer under the protection of high-purity nitrogen, start stirring, and heat to 60°C in a circulating water bath. Add 2.4 mL of n-butyllithium solution into the reactor to initiate the polymerization reaction, and react at 70° C. for 30 minutes (the monomer conversion rate is above 99% by weight), to obtain the first polymerization mixed liquid containing isoprene block.

[0144] (2) Add 4.6 mL of a hexane solution of divinylbenzene into the reactor, and react at 70° C. for 30 min to obtain a second polymerization mixture.

[0145] (3) Add 2.3mL tetrahydrofuran and 1.9mL sodium dodecylbenzenesulfonate (SDBS) hexane solution (concentration is 0.3M, purchased from Bailingwei Reagent Company, the same below) in the reactor, then add 196g butadiene , isoprene and styrene mixed monomer (wherein, butadiene 88g, isoprene 59g, styrene 49g, a...

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Abstract

The invention discloses a block copolymer and composition, its preparation method, vulcanized rubber and application, tread rubber and tire. The block copolymer according to the present invention contains PI block, SIBR block and SSBR block, and the vinyl content of PI block is relatively low, and the vinyl content, propenyl content and styrene content in SIBR block are moderate, and SSBR block The vinyl content and styrene content in the medium are relatively high, and the block copolymer also contains linking units derived from compounds shown in formula I, part of the SIBR block is connected to the PI block through the linking unit, and the remaining part of the SIBR block is directly connected to the The PI blocks are connected, and at least part of the SSBR blocks are directly connected to the SIBR blocks. While the copolymer rubber can obtain good wet skid resistance, the rolling resistance is also significantly reduced, and has better comprehensive physical and mechanical properties, and is particularly suitable as a tire tread rubber. CH 2 =CH‑R 1 -CH=CH 2 (Formula I).

Description

technical field [0001] The present invention relates to a block copolymer and a preparation method thereof. The present invention also relates to a composition containing the block copolymer and a vulcanized rubber formed from the block copolymer or the composition. The present invention further relates to the The block copolymer, the block copolymer composition and the application of the vulcanized rubber, the present invention also relates to a tire tread and a tire. Background technique [0002] Reducing energy consumption is the long-term goal of the development of the automobile industry, and reducing the rolling resistance of tires has become the top priority, but at the same time, other important performances of tires such as wet skid resistance, safety, wear resistance and durability are more comprehensively required . [0003] The comprehensive performance of rubber is generally characterized by loss factor (tanδ), which can more accurately describe the viscoelasti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F297/04C08F236/08C08F212/08C08F236/06C08F236/10C08F212/36C08L53/02B60C1/00
CPCB60C1/0016C08F212/08C08F212/36C08F236/06C08F236/08C08F236/10C08F297/046C08L53/02Y02T10/86
Inventor 李建成赵姜维孙伟唐正伟
Owner CHINA PETROLEUM & CHEM CORP
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