RUBBER COMPOSITION FOR TIRE AND TIRE

摘要

PROBLEM TO BE SOLVED: To provide a rubber composition for a tire, which can manufacture the tire excellent in abrasion resistance and traveling performance on an ice road surface.

SOLUTION: The rubber composition for the tire is composed of at least four polymers and contains a block copolymer whose polymer blocks at both terminal ends are polystyrene, and an ester-based plasticizer having a saturation annular structure expressed by a formula (1). The rubber composition also contains 1 to 40 pts.mass of a mixture which is obtained by mixing the block copolymer and the ester-based plasticizer in advance based on 100 pts.mass of diene-based rubber. In the formula, R1and R2each independently denote hydrogen atoms or 1-18C organic group.

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