| 摘要 |
PROBLEM TO BE SOLVED: To provide a rubber composition for a tire tread having excellent balance between low fuel consumption and grip properties, and capable of suppressing cracking of the tread sipe bottom while maintaining wear resistance. SOLUTION: The rubber composition for the tire tread includes, based on 100 pts.wt. of a diene-based rubber, 30-150 pts.wt. of a reinforcing filler composed of at least either of carbon black and silica, and 5-40 pts.wt. of a liquid polybutadiene having terminals subjected to amine modification. Carbon black having 60-120 m<SP>2</SP>/g nitrogen adsorption specific surface area is preferably used as the reinforcing filler. Furthermore, silica as the reinforcing filler in an amount of 20-100 pts.wt. based on 100 pts.wt. of a diene-based rubber is preferably compounded and a silane coupling agent in an amount of 2-25 pts.wt. based on 100 pts.wt. of the silica is preferably compounded. COPYRIGHT: (C)2009,JPO&INPIT
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