| 简介 |
PROBLEM TO BE SOLVED : To improve low-heat-generating properties while satisfying low-temperature performance or maintaining workability.
SOLUTION : The rubber composition for tire tread includes : 40-110 pts.mass of a filler including 30-110 pts.mass of silica, based on 100 pts.mass of a rubber component containing 60-90 pts.mass of modified solution-polymerized styrene butadiene rubber with a functional group including hetero atom (e.g., amino, hydroxyl, etc.) being introduced thereto and 10-40 pts.mass of butadiene rubber synthesized using a rare-earth catalyst (e.g., neodymium catalyst); and further includes a silane coupling agent represented by general formula (1) in an amount of 5-30 mass% of the mixing amount of silica. (CnH2n+1O)3Si-CmH2m-S-CO-CkH2k+1...(1). (In the formula, n is an integer of 1-3, m is an integer of 1-5, and k is an integer of 2-9).
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