发明名称 |
Rubber Composition for Use in Tire Treads |
摘要 |
Problem: To provide a rubber composition for use in tire treads by which rubber hardness, elastic modulus and rubber strength in the high-temperature state can be enhanced to or beyond conventional levels while dry grip performance is maintained.;Means of Solution: A rubber composition in which from 80 to 150 parts by weight of carbon black having a nitrogen adsorption specific surface area of from 200 to 400 m2/g is compounded per 100 parts by weight of styrene-butadiene rubber including from 60% to 100% by weight of solution-polymerized styrene-butadiene rubber S-SBR1 and from 40% to 0% by weight of solution-polymerized styrene-butadiene rubber S-SBR2 so as to result in a total of 100% by weight, the styrene quantity of the S-SBR1 being from 30% to 38% by weight, the vinyl quantity of the S-SBR1 being from 60% to 80% by weight, the glass transition temperature of the S-SBR1 being from −20° C. to −5° C., the weight-average molecular weight of the S-SBR1 being from 1,000,000 to 1,800,000, the glass transition temperature of the S-SBR2 being not less than −30° C. and less than −20° C., and the weight-average molecular weight of the S-SBR2 being from 1,000,000 to 1,800,000. |
申请公布号 |
US2015259515(A1) |
申请公布日期 |
2015.09.17 |
申请号 |
US201214383898 |
申请日期 |
2012.03.08 |
申请人 |
The Yokohama Rubber Co., LTD. |
发明人 |
Takizawa Yoichi;Kushida Naoki |
分类号 |
C08L9/06;C08K3/00;C08K3/04 |
主分类号 |
C08L9/06 |
代理机构 |
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代理人 |
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主权项 |
1. A rubber composition for use in tire treads, comprising from 80 to 150 parts by weight of carbon black having a nitrogen adsorption specific surface area of from 200 to 400 m2/g being compounded per 100 parts by weight of styrene-butadiene rubber including from 60% to 100% by weight of solution-polymerized styrene-butadiene rubber S-SBR1 and from 40% to 0% by weight of solution-polymerized styrene-butadiene rubber S-SBR2 so as to result in a total of 100% by weight, a styrene quantity of the S-SBR1 being from 30% to 38% by weight, a vinyl quantity of the S-SBR1 being from 60% to 80% by weight, a glass transition temperature of the S-SBR1 being from −20° C. to −5° C., a weight-average molecular weight of the S-SBR1 being from 1,000,000 to 1,800,000, a glass transition temperature of the S-SBR2 being not less than −30° C. and less than −20° C., and a weight-average molecular weight of the S-SBR2 being from 1,000,000 to 1,800,000. |
地址 |
Minato-ku, Tokyo JP |