公开(公告)号：US20180215895A1

公开(公告)日：2018-08-02

申请号：US15578772

申请日：2016-06-10

Applicant: BRIDGESTONE CORPORATION

Inventor： Kouichi SAITOU

IPC: C08K3/36 ,  C08K3/22

CPC classification number: C08K3/36 ,  B60C1/00 ,  C08K3/22 ,  C08K9/02 ,  C08K2003/2227 ,  C08K2201/006 ,  C08L21/00 ,  C08L7/00 ,  C08L9/06

Abstract: Provided is a rubber composition that can reduce unvulcanized viscosity and has excellent wear resistance and low-loss property. To this end, a rubber composition contains silica, in which the silica has a pH of 10.0 or less before washing and a pH of 4.0 or more after washing, and contains Al2O3, and the content in mass % of Al2O3, a BET specific surface area in m2/g of the silica and a CTAB specific surface area in m2/g of the silica satisfy: Al2O3−10.9×(BET specific surface area/CTAB specific surface area)>−11.0.