申请人:BRIDGESTONE CORPORATION
公开号:US20200263001A1
公开(公告)日:2020-08-20
Provided are: a rubber additive that enables to provide a rubber composition having excellent low heat generation properties and manufacturing operability; a rubber composition including the rubber additive; and a pneumatic tire including the rubber composition. The rubber additive is characterized by containing a hydrazide compound represented by Formula (I) below, where R represents a hydroxyl group, an alkyl group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms and A represents an alkylene group having 1 to 4 carbon atoms or an alkenylene group having 2 to 4 carbon atoms; the rubber composition containing the rubber additive; and the pneumatic tire including the rubber composition: