申请人:Okabe Noboru
公开号:US20140187707A1
公开(公告)日:2014-07-03
Provided are: a rubber composition that improves fuel economy and wet grip performance together while maintaining the balance between them; and a pneumatic tire whose component (in particular tread) includes the rubber composition. The invention relates to a rubber composition containing: a rubber component containing a copolymer; silica; and a diene rubber gel bearing a hydroxyl group, wherein the copolymer is obtained by copolymerization of 1,3-butadiene, styrene, and a compound represented by 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 weight average molecular weight of 1.0×10
5
-2.5×10
6
, and the diene rubber gel has a Tg of −40 to −10° C., and is present in an amount of 10-30 parts by mass per 100 parts by mass of the rubber component;