A conjugated diolefin copolymer rubber and a rubber composition which can produce vulcanized products exhibiting well-balanced improved properties such as wet skid properties, low hysteresis loss properties, abrasion resistance, and breaking strength irrespective of the types and combinations of fillers to be added, and is useful as a tread material for low fuel consumption tires, large tires, and high performance tires. A conjugated diolefin copolymer rubber is prepared by the copolymerization of a conjugated diolefin and a vinyl aromatic compound, and (1) has a content of the bonded vinyl aromatic compound of 5-50 wt%, (2) contains 0.01-5.0 mmol of an alkoxysilyl group having substantially non-hydrolyzable Si-O-R bond (wherein R indicates a hydrocarbon group having 4-20 carbon atoms) and 0.01-2.0 mmol of a tin-carbon bond for 100 g of the copolymer rubber, and (3) has a polymodal-type molecular weight distribution.
一种共轭二烯烃共聚物橡胶和一种橡胶组合物,无论添加填料的类型和组合如何,都能生产出均衡改善性能的
硫化产品,如湿滑性能、低滞后损失性能、耐磨性和断裂强度,可用作低油耗轮胎、大型轮胎和高性能轮胎的胎面材料。共轭二烯烃共聚橡胶由共轭二烯烃和
乙烯基芳香化合物共聚制备而成,(1) 键合
乙烯基芳香化合物的含量为 5-50 wt%,(2) 含有 0.01-5.0毫摩尔具有基本上不可
水解的Si-O-R键的烷氧基
硅基(其中R表示具有4-20个碳原子的烃基)和0.01-2.0毫摩尔的
锡-碳键的共聚橡胶,以及(3)具有多模态型分子量分布。