| 摘要 |
PROBLEM TO BE SOLVED: To provide a rubber composition which achieves excellent low fuel consumption properties and wear resistance while retaining braking performance on a wet road surface, and to provide a pneumatic tire obtained by using the rubber composition. SOLUTION: The rubber composition is obtained by adding 30-110 pts.mass of silica to 100 pts.mass of diene rubber component and adding silane coupling agent by 3-15 mass% of silica blending quantity, where the diene rubber component includes≥20 mass% of modified SBR introduced with functional groups having a hetero atom. The method for producing the rubber composition comprises: a first kneading step, in which 60-85 pts.mass of the diene rubber component including≥20 mass% of the modified SBR is mixed, in a kneader device, with all of the reinforcing filler; a step of temporarily taking out a first master batch from the kneader device; and a second kneading step, in which only remaining diene rubber component is added, in the kneader device, to the obtained first master batch. A pneumatic tire with a tread comprising the rubber composition is obtained. COPYRIGHT: (C)2012,JPO&INPIT |
