A rubber composition that can obtain a rubber elastic body having small rolling resistance and excellent impact resilience and a method for producing the same, and a tire having small rolling resistance and excellent impact resilience are provided.
The rubber composition of the present invention is obtained by kneading a rubber component containing a conjugated diene polymer (A) having at least one functional group selected from a tertiary amino group, a thiol group, a hydroxyl group, an epoxy group, a carboxylic acid group, a thioepoxy group, a hydrocarbylthio group and a hydrocarbylsilyl group and a conjugated diene polymer (B) having no functional group chemically bondable to silica, silica (C) and a dispersing agent (D) composed of an organic compound having at least one element selected from the group consisting of nitrogen, carbonyl oxygen and ether oxygen.
本发明提供了一种可获得具有较小滚动阻力和优异冲击回弹性的橡胶弹性体的橡胶组合物及其生产方法,以及一种具有较小滚动阻力和优异冲击回弹性的轮胎。
本发明的橡胶组合物是通过捏合含有共轭二烯聚合物(A)的橡胶成分而获得的,共轭二烯聚合物(A)具有至少一个官能团,这些官能团选自叔
氨基、
硫醇基、羟基、环氧基、
羧酸基、
硫环氧基、
二氧化硅 (C) 和分散剂 (D) 组成的共轭二烯聚合物 (B),其中共轭二烯聚合物 (B) 不具有可与
二氧化硅化学键合的官能团,
二氧化硅 (C) 和分散剂 (D) 由有机化合物组成,有机化合物中至少有一种元素选自氮、羰基氧和醚氧组成的组。