An oil-extended rubber comprising a conjugated diene rubber having a specific amount of isoprene units, and an extender oil incorporated therein, characterized in that the rubber is obtained by polymerizing a monomer mixture comprising 1,3-butadiene and an aromatic vinyl monomer with the aid of an organic active metal as an initiator in a hydrocarbon medium; subsequently adding isoprene to continue polymerization, then; reacting the resulting polymer having an activated terminal with a coupling agent. A rubber composition comprising the oil-extended rubber is suitable for tread of tire having a low fuel consumption.
一种由具有特定数量
异戊二烯单元的共轭二烯橡胶和其中加入的延伸油组成的油延伸橡胶,其特征在于,该橡胶是通过在烃介质中以有机活性
金属为
引发剂,聚合由
1,3-丁二烯和芳香
乙烯基单体组成的单体混合物;随后加入
异戊二烯以继续聚合,然后;使所产生的具有活化末端的聚合物与
偶联剂反应而得到的。由油延伸橡胶组成的橡胶组合物适用于低油耗轮胎的胎面。