公开(公告)号：US5714022A

公开(公告)日：1998-02-03

申请号：US708367

申请日：1996-09-04

申请人： Takashi Nagao ,  Takuji Yamamoto ,  Takayuki Uchio

发明人： Takashi Nagao ,  Takuji Yamamoto ,  Takayuki Uchio

IPC分类号： B60C1/00 ,  B60C13/00 ,  C08L21/00

CPC分类号： B60C13/002 ,  B60C1/0025 ,  C08L21/00 ,  B60C2013/045

摘要： The invention provides a pneumatic tire in which each sidewall covering and protecting the side face of the carcass has a double-layer structure consisting of an inner layer adjacent to the carcass and an outer layer disposed outwardly on the inner layer and which is characterized in that the rubber component of the rubber composition constituting the inner layer consists essentially of 10 to 30% by weight of at least one rubber having a low degree of unsaturation selected from the group consisting of halogenated butyl rubber and ethylene-propylene-diene rubber and 90 to 70% by weight of at least one rubber having a high degree of unsaturation selected from the group consisting of natural rubber, isoprene rubber, butadiene rubber and styrene-butadiene rubber and that the rubber component of the rubber composition constituting the outer layer consists essentially of 30 to 60% by weight of at least one rubber having a low degree of unsaturation selected from the corresponding group defined above and 70 to 40% by weight of at least one rubber having a high degree of unsaturation selected from the corresponding group defined above.

摘要翻译： 本发明提供了一种充气轮胎，其中覆盖和保护胎体侧面的每个侧壁具有由邻近胎体的内层和外层设置在外层上的双层结构，其特征在于， 构成内层的橡胶组合物的橡胶组分基本上由10至30重量％的至少一种低级不饱和度的选自卤化丁基橡胶和乙烯 - 丙烯 - 二烯橡胶的橡胶和90至 70重量％的选自天然橡胶，异戊二烯橡胶，丁二烯橡胶和苯乙烯 - 丁二烯橡胶中的至少一种具有高不饱和度的橡胶，并且构成外层的橡胶组合物的橡胶组分基本上由 30至60重量％的至少一种具有低不饱和度的橡胶，其选自相应的定义 和70〜40重量％的至少一种选自上述相应基团的不饱和度高的橡胶。