| 发明名称 | Rubber composition for use in tire side walls and pneumatic tire using the same | ||
| 摘要 | A rubber composition for use in tire side walls contains from 30 to 40 parts by mass of carbon black having a nitrogen specific surface area of from 20 to 35 m2/g and a DBP oil absorption of from 50 to 95 cm3/100 g per 100 parts by mass of a rubber component constituted by from 30 to 70 mass % of a butadiene rubber having a cis-1,4 bond content of at least 97%, a Mooney viscosity (ML1+4) at 100° C. of at least 45, and a ratio (T−cp)/(ML1+4) of the viscosity [cps] of a 5 mass % toluene solution at 25° C. (T−cp) to the Mooney viscosity of at least 2.0, and from 30 to 70 mass % of another diene-based rubber. | ||
| 申请公布号 | US9109102(B2) | 申请公布日期 | 2015.08.18 |
| 申请号 | US201214112638 | 申请日期 | 2012.04.18 |
| 申请人 | The Yokohama Rubber Co., LTD. | 发明人 | Wada Tomoyuki |
| 分类号 | C08L9/00;C08L7/00;B60C1/00;C08L21/00 | 主分类号 | C08L9/00 |
| 代理机构 | Thorpe North & Western | 代理人 | Thorpe North & Western |
| 主权项 | 1. A tire side wall rubber composition comprising: from 30 to 40 parts by mass of carbon black having a nitrogen specific surface area of from 20 to 35 m2/g and a DBP oil absorption of from 50 to 95 cm3/100 g per 100 parts by mass of a rubber component comprising from 30 to 70 mass % butadiene rubber having a cis-1,4 bond content of at least 97%, a Mooney viscosity (ML1+4) at 100° C. of at least 45, and a ratio (T−cp)/(ML1+4) of the viscosity [cps] of a 5 mass % toluene solution at 25° C. (T−cp) to the Mooney viscosity of at least 2.2 and not greater than 2.4, and from 30 to 70 mass % of another diene-based rubber. | ||
| 地址 | JP | ||