- 专利标题： RUBBER COMPOSITION AND PNEUMATIC TIRE
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申请号： EP19884889.7申请日： 2019-10-15
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公开(公告)号： EP3763783A1公开(公告)日： 2021-01-13
- 发明人: KITAGO, Ryota , YASUDA, Rie , HIRAO, Shogo
- 申请人： Sumitomo Rubber Industries, Ltd.
- 申请人地址： JP Kobe-shi, Hyogo 651-0072 6-9, Wakinohama-cho, 3-chome Chuo-ku
- 代理机构： TBK
- 优先权： JP2018212210 20181112
- 国际公布： WO2020100492 20200522
- 主分类号： C08L9/06
- IPC分类号： C08L9/06 ; B60C1/00 ; C08K3/04 ; C08K3/36 ; C08L15/00
摘要：
The purpose is to provide rubber compositions and pneumatic tires which have reduced changes in hardness over time. The present invention relates to a rubber composition containing a copolymer obtained by copolymerizing an aromatic vinyl compound and a conjugated diene compound, the rubber composition having a heat aging resistance index defined by equation (1) of 10 or less.
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