| 摘要 |
PROBLEM TO BE SOLVED: To obtain a rubber composition capable of giving tires high gripping performance and fracture resistance, and to provide a tire using the rubber composition in its tread. SOLUTION: The rubber composition is obtained by compounding 100 pts.mass of a rubber component with 1-50 pts.mass of a styrene-butadiene-styrene block copolymer and a flexibilizer incompatible with polystyrene. In this rubber composition, the flexibilizer is preferably a liquid diene polymer, especially a styrene-butadiene copolymer 10,000 or less in weight-average molecular weight in terms of polystyrene. COPYRIGHT: (C)2008,JPO&INPIT
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