公开(公告)号：US20240278600A1

公开(公告)日：2024-08-22

申请号：US18567439

申请日：2022-03-15

申请人： The Yokohama Rubber Co., Ltd.

发明人： Rei KAWAGUCHI

IPC分类号： B60C1/00 ,  B60C11/00 ,  C08C19/25 ,  C08K3/36 ,  C08K5/098 ,  C08K5/5419 ,  C08K5/548 ,  C08L53/02

CPC分类号： B60C1/0016 ,  B60C11/005 ,  C08C19/25 ,  C08K3/36 ,  C08K5/098 ,  C08K5/5419 ,  C08K5/548 ,  C08L53/02 ,  C08K2201/006

摘要： A rubber composition for a tire contains a diene rubber, silica, a silane coupling agent, a fatty acid metal salt, and an alkylsilane. 60-95 mass % of a specific conjugated diene rubber is used as the diene rubber and is formed by reacting a polyorganosiloxane with an active terminal of a conjugated diene-based polymer chain having the active terminal and by making a polymer block A continuous with a polymer block B. The polymer block A contains 80-95 mass % of isoprene and 5-20 mass % of aromatic vinyl, has an active terminal, and has a weight average molecular weight of 500-15000. The polymer block B contains 1,3-butadiene and an aromatic vinyl and has an active terminal. 55-90 parts by mass of silica having a CTAB adsorption specific surface area of 185 m2/g or more is used as the silica.