| abstract |
To provide a rubber composition for tire treads that improves low rolling resistance, wet performance, and wear resistance to more than conventional levels. In 100 parts by weight of diene rubber containing 35 to 89 weight percent of modified conjugated diene polymer rubber and 11 to 40 weight percent of butadiene rubber, 3 to 60 parts by weight of aromatic modified terpene resin, 100 to 150 parts by weight of a filler, the silica content of the above-mentioned filler is 70% by weight or more, and the ratio Wte/Wbr of the compounding amount Wte of the aromatic modified terpene resin to the compounding amount Wbr of the above-mentioned butadiene rubber is 0.5 to 1.3 , and the above-mentioned modified conjugated diene polymer rubber has a terminal modification group, the terminal modification group contains a functional group that has interaction with silica, and the aromatic vinyl of the modified conjugated diene polymer rubber The base unit content is 38-48% by weight, the vinyl unit content is 20-35% by weight, the weight average molecular weight is 600,000-1 million, and the softening point of the aromatic modified terpene resin is 100-150°C. |