申请人:Sumitomo Rubber Industries, Ltd.
公开号:EP2740759A1
公开(公告)日:2014-06-11
Provided are: a rubber composition that improves fuel economy, wet grip performance, and dry grip performance together while maintaining the balance between them; and a pneumatic tire whose component (particularly tread) includes the rubber composition. The invention relates to a rubber composition containing: a rubber component containing a copolymer; and a silica, wherein the copolymer is obtained by copolymerization of 1,3-butadiene, styrene, and a compound of formula (I) below, has an amino group at a first chain end and a functional group containing at least one atom selected from the group consisting of nitrogen, oxygen, and silicon at a second chain end, and has a Mw of 1.0×105-2.5×106, and the silica has an average length W1 between branched particles Z-Z inclusive of the branched particles Zs of 30-400 nm, wherein the branched particles Zs are each adjacent to at least three particles;
wherein R1 represents a C1-C10 hydrocarbon group.
本发明提供了:一种橡胶组合物,可同时提高燃油经济性、湿抓地力性能和干抓地力性能,同时保持三者之间的平衡;以及一种充气轮胎,其部件(尤其是胎面)包括该橡胶组合物。本发明涉及一种橡胶组合物,其中包含:含有共聚物的橡胶组分;以及白炭黑,其中共聚物由 1,3-丁二烯、苯乙烯和下式(I)化合物共聚得到,在第一链端具有氨基,在第二链端具有含有至少一个选自氮、氧和硅组成的组中的原子的官能团,且 Mw 为 1.0×105-2.5×106,且该二氧化硅在包括支化颗粒 Zs 在内的支化颗粒 Z-Z 之间的平均长度 W1 为 30-400 nm,其中支化颗粒 Zs 每个至少与三个颗粒相邻;
其中 R1 代表 C1-C10 烃基。