| abstract |
The purpose of the present invention is to provide: a tire rubber composition having excellent wear resistance, wet performance, dry performance, and low rolling resistance, when used in a tire; and a pneumatic tire using said tire rubber composition in a tread section thereof. This tire rubber composition contains natural rubber, a diene-based blended rubber comprising a solution-polymerized SBR and an emulsion-polymerized SBR, an aromatic modified terpene resin, silica, and carbon black. The solution-polymerized SBR contains a specific solution-polymerized SBR having a block containing an isoprene unit at one end thereof and a modified terminal for silica at the other end thereof. The styrene unit content in the emulsion-polymerized SBR is 35%-50% by mass. The total natural rubber content and the total solution-polymerized SBR and emulsion-polymerized SBR content in the diene-based blended rubber are specified and the aromatic modified terpene resin, silica, and carbon black content, relative to the diene-based blended rubber is specified. |