| 摘要 |
PROBLEM TO BE SOLVED: To improve the wet performance of a rubber composition and the durability of a tire without deteriorating the performance on ice. SOLUTION: The rubber composition for a tire tread has a JIS hardness at 0°C of≤52 and contains 100 pts.wt. rubber component containing NR or NR/BR, 10-30 pts.wt. reaction product of at least one silane coupling agent X and silica and 3-7 pts.wt. wollastonite with an average particle size D50 of 3-15μm and an aspect ratio of 10-25. The reaction product is represented by the formula: Y<SB>3</SB>SiC<SB>3</SB>H<SB>6</SB>SC(=O)R (wherein Ys are each independently a methoxy, ethoxy, propoxy, isopropoxy, isobutoxy, acetoxy or oxamate group; and R is a 1-18C hydrocarbon group chosen from a cyclic or branched alkyl group, an alkenyl group, an aryl group and an aralkyl group) and is obtained by reacting silica with 1-25 wt% coupling agent X based on the silica weight. A pneumatic tire using the same is also provided. COPYRIGHT: (C)2006,JPO&NCIPI
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