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Rubber composition for tire tread, and tire

A technology of rubber composition and tire tread, which is applied in the field of rubber composition for tire tread and tires, can solve the problems of wet grip performance degradation, and achieve the effect of improving initial wet grip performance

Active Publication Date: 2021-02-12
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is usually accompanied by the problem of reduced initial wet grip performance

Method used

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  • Rubber composition for tire tread, and tire
  • Rubber composition for tire tread, and tire
  • Rubber composition for tire tread, and tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0102] The present invention will be described based on examples. The present invention is not limited to these Examples.

[0103] Various chemicals used in Examples and Comparative Examples are shown below.

[0104] SBR1: T3830 (S-SBR, styrene content: 33% by mass, vinyl bond amount: 36mol%, oil-extended product containing 37.5 parts by mass of oil content (based on 100 parts by mass of the rubber component)), manufactured by Asahi Kasei Corporation

[0105] SBR2: Modified SBR (S-SBR, styrene content: 25% by mass, vinyl bond amount: 30mol%, weight average molecular weight (Mw) 500,000), manufactured by Production Example 1

[0106] Silica: Nipsil AQ (N 2 SA: 205m 2 / g), manufactured by Tosoh Corporation

[0107] Carbon black: Show Black N220 (ordinary carbon, N 2 SA: 114m 2 / g), manufactured by Cabot Japan

[0108] Aluminum hydroxide: HIGILITE H-43 (average primary particle size: 1μm, N 2 SA: 6.7m 2 / g), manufactured by Showa Denko Co., Ltd.

[0109]Silane coupling ...

manufacture example 1

[0127] Production example 1 (manufacture of modified SBR)

[0128] A stainless steel polymerization reactor with an agitator having an internal volume of 30 liters was washed and dried, and the gas inside the polymerization reactor was replaced with dry nitrogen. Then, add 15.3kg industrial hexane (density: 680kg / m 3 ), 912 g of 1,3-butadiene, 288 g of styrene, 9.1 ml of tetrahydrofuran and 6.4 ml of ethylene glycol diethyl ether. Then, a small amount of n-1-butyllithium dissolved in n-hexane solution was added as a scavenger in the polymerization reactor to detoxify the impurities that deactivate the polymerization initiator in advance. n-Butyllithium (n-butyllithium content: 19.2 mmol) dissolved in n-hexane solution was charged into the polymerization reactor to start a polymerization reaction. Polymerization was continued for 3 hours. During the polymerization reaction, adjust the temperature of the polymerization reactor to 65 ° C, stir the solution in the polymerizatio...

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Abstract

Through this rubber composition for a tire tread, including a diene-based rubber component, and 0.5-6.0 parts by mass of a C40-70 branched alkane, no more than 0.05-3.5 parts by mass of a C45 or higher straight-chain alkane, and 1-35 parts by mass of aluminum hydroxide with respect to 100 parts by mass of the diene-based rubber component, and this tire provided with a tread constituted from the rubber composition for a tire tread, it is possible to provide a rubber composition for a tire tread whereby initial wet grip performance can be enhanced, and thereby to provide a tire having enhanced initial wet grip performance.

Description

technical field [0001] The present invention relates to a rubber composition for tire treads and a tire. Background technique [0002] From the standpoint of safety and the like, wet grip performance is required for tire treads that come into contact with road surfaces. In order to improve the wet grip performance of the rubber composition, there is a method of increasing the glass transition temperature (Tg) of the rubber composition by adding a resin. However, it is usually accompanied by the problem of a decrease in initial wet grip performance. In addition, as another means of improving wet grip performance, Patent Document 1 proposes a method of improving wet grip performance by adding aluminum hydroxide. [0003] prior art literature [0004] patent documents [0005] Patent Document 1: JP 2002-338750 A Contents of the invention [0006] The technical problem to be solved by the invention [0007] However, even for the rubber composition described in Patent Doc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/00B60C1/00C08K3/22C08K5/01
CPCC08K3/22C08L9/00C08K5/01C08L9/06B60C1/0016Y02T10/86C08L15/00C08L91/00C08L91/06C08L45/00C08K3/36C08K3/04C08K5/548C08K5/18C08L2205/025C08L2205/035
Inventor 高木启治宫崎达也
Owner SUMITOMO RUBBER IND LTD