| abstract |
An object of the present invention is to provide a rubber composition for a tire which is excellent in abrasion resistance, wet performance, dry performance and low rolling resistance when a tire is used, and a pneumatic tire using the rubber composition for a tire as the tread portion. The rubber composition for a tire of the present invention comprises a diene-based blend rubber comprising natural rubber, solution-polymerized SBR and emulsion-polymerized SBR, an aromatic-modified terpene resin, silica and carbon black, Wherein the styrene unit content of the emulsion-polymerized SBR is 35 to 50% by mass, and the diene-based block copolymer has a block containing an isoprene unit at the end and a modified terminal end for silica at the other end, The content of the natural rubber in the blend rubber, and the total content of the solution-polymerized SBR and the emulsion-polymerized SBR are specified, and the amount of the aromatic-modified terpene resin, the silica and the carbon The content of black is specified. |