发明授权
- 专利标题: Styrene-butadiene block copolymer
- 专利标题(中): 苯乙烯 - 丁二烯嵌段共聚物
-
申请号: US330862申请日: 1981-12-15
-
公开(公告)号: US4433109A公开(公告)日: 1984-02-21
- 发明人: Yasumasa Takeuchi , Mitsuhiko Sakakibara , Fumio Tsutsumi , Akio Takashima , Iwakazu Hattori
- 申请人: Yasumasa Takeuchi , Mitsuhiko Sakakibara , Fumio Tsutsumi , Akio Takashima , Iwakazu Hattori
- 申请人地址: JPX Tokyo
- 专利权人: Japan Synthetic Rubber Co., Ltd.
- 当前专利权人: Japan Synthetic Rubber Co., Ltd.
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX55-178226 19801217; JPX55-186194 19801226; JPX55-186195 19801226
- 主分类号: C08F297/04
- IPC分类号: C08F297/04 ; C08G81/02
摘要:
A styrene-butadiene block copolymer having a Mooney viscosity (ML.sub.1+4, 100.degree. C.) of 10 to 150 comprising two specific random styrene-butadiene copolymer blocks different in bound styrene content and in vinyl content in the butadiene portion, and optionally polybutadiene blocks, wherein the total vinyl content in the whole bound butadiene is 30 to 70% and the total bound styrene content is 10 to 40% by weight. Said block copolymer is excellent in wet skid resistance and rolling resistance, well-balanced in fracture and wear characteristics and also satisfactory in processability and cold flow property.