| 摘要 |
<p>The present invention aims to provide a rubber composition that improves heat resistance and particularly inhibits the changes in properties such as hardness of the vulcanized rubber composition (rubber hardening degradation) due to long-term use without an increased amount of an age resistor, thereby extending the life-span without deterioration of performance on ice, and reduces vulcanization time while maintaining good scorch resistance, and increases cross-linking efficiency; and a studless tire having a cap tread produced from the composition. The rubber composition for a cap tread of the invention comprises: a rubber component containing an isoprene-based rubber; silica; a compound represented by formula (I) and/or (II); and a thiuram vulcanization accelerator,
wherein R 1 and R 2 may be the same or different, and each represent a hydrogen atom, an alkyl group, an aryl group, or an aralkyl group, provided that the case where R 1 and R 2 are simultaneously hydrogen atoms is excluded.</p> |
