| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a rubber composition having excellent processability, scorching resistance and extrusion skin property and a low extruder pressure.SOLUTION: The rubber composition comprises a diene rubber, silica, a mercapto silane coupling agent, and a titanium compound having an alkoxy group and/or an acylate group. The silica shows a nitrogen adsorption specific surface area of 180 m/g or more, and is included by 5 to 200 parts by mass with respect to 100 parts by mass of the diene rubber. The content of the mercapto silane coupling agent is 0.1 to 20 mass% with respect to the content of the silica; and the content of the titanium compound is 0.1 to 20 mass% with respect to the content of the silica.</p> |
