| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a rubber composition capable of achieving weight reduction without deteriorating the hardness and heat resistance. <P>SOLUTION: The rubber composition contains ≥1.9 pts.mass of sulfur with respect to 100 pts.mass of a polymer component composed of 60 to 100 pts.mass of a block polymer (for example, SBS, SIS) constituted of a conjugate dieneic polymer block comprising a conjugate diene polymer or the conjugated diene polymer partially hydrogenated and an aromatic vinyl polymer block, and containing ≥40 mass% of the aromatic vinyl polymer block, and 40 to 0 pts.mass of a dienic rubber, wherein the product of contents of the sulfur and a vulcanization accelerator is ≥1.7 pts.mass. <P>COPYRIGHT: (C)2012,JPO&INPIT |
