公开(公告)号：US4812527A

公开(公告)日：1989-03-14

申请号：US112989

申请日：1987-10-27

申请人： Hiroyoshi Takao ,  Nabuyuki Yoshida ,  Akio Imai ,  Mitsuji Tsuji ,  Yuichi Saito

发明人： Hiroyoshi Takao ,  Nabuyuki Yoshida ,  Akio Imai ,  Mitsuji Tsuji ,  Yuichi Saito

IPC分类号： B60C1/00 ,  C08F297/04 ,  C08L53/00 ,  C08L53/02

CPC分类号： C08F297/044 ,  B60C1/0016 ,  Y10S152/905

摘要： A rubber composition suitable for tire treads having well-balanced excellent wet skid characteristic, ice skid characteristic and rolling characteristic, and an excellent processability, which comprises a rubber component containing at least 20% by weight of a block copolymer consisting essentially of a block A and a block B, obtained by conducting polymerization of an aromatic vinyl compound and a conjugated diene compound in a hydrocarbon solvent in the presence of an organolithium initiator and modifying with a coupling agent, and satisfying the following conditions (A) to (E);(A) the block A having a content of an aromatic vinyl compound of at most 5% by weight and a content of 1,2-bonds in the conjugated diene component of at least 10% by weight,(B) the block B having a content of an aromatic vinyl compound of 25 to 50% by weight and a content of 1,2-bonds in the conjugated diene component of at least 10% by weight,(C) a content of the block A in the block copolymer being from 20 to 80% by weight,(D) a content of the aromatic vinyl compound in the block copolymer being from 5 to 30% by weight and a content of 1,2-bonds in the conjugated diene component of the block copolymer being from 20 to 60% by weight, and(E) at least 40% by weight of the polymer chains of the block copolymer being a branched polymer formed by modification with a dicarboxylic acid diester.

摘要翻译： 一种适用于轮胎胎面的橡胶组合物，具有平衡优异的湿滑特性，防滑特性和滚动特性，以及优异的加工性，其包含含有至少20重量％的基本上由块A 和通过在有机锂引发剂的存在下在烃溶剂中进行芳族乙烯基化合物和共轭二烯化合物的聚合而获得的嵌段B，并且用偶联剂进行改性，并满足以下条件（A）〜（E）; （A）具有至多5重量％的芳族乙烯基化合物含量的嵌段A和共轭二烯组分中的1,2-键的含量为至少10重量％，（B）嵌段B具有 芳香族乙烯基化合物的含量为25〜50重量％，共轭二烯成分中的1,2-键含量为10重量％以上，（C）嵌段共聚物中的嵌段A的含量为 20〜80重量％，（D）嵌段共聚物中芳香族乙烯基化合物的含量为5〜30重量％，嵌段共聚物的共轭二烯成分中的1,2-键含量为 20至60重量％，和（E）至少40重量％的嵌段共聚物的聚合物链是通过用二羧酸二酯改性形成的支化聚合物。