| 摘要 |
PROBLEM TO BE SOLVED: To provide a rubber composition for a pneumatic tire that has processability, elongation at break, elastic modulus, low-heat build-up property, flexural fatigue resistance and the like well-balancedly improved and is suitably employable for a rim cushion part and the like of a tire. SOLUTION: The rubber composition for a pneumatic tire comprises 100 pts.wt. of a modified diene rubber comprising (A) 95-99 wt.% of a diene rubber and (B) 5-1 wt.% of a hydrogen-bonding thermoplastic elastomer that has a main chain comprised of a diene rubber, bears a carbonyl-containing group and a nitrogen-containing heterocycle in the molecule and has a weight-average molecular weight Mw of at most 50,000 and, incorporated therewith, 75-110 pts.wt. of carbon black and a vulcanizing ingredient having a vulcanization accelerator/sulfur weight ratio of 0.9-1.8. COPYRIGHT: (C)2011,JPO&INPIT
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