A process for producing a diolefin polymer or copolymer, comprising the steps of polymerizing 55-100 wt% of a conjugated diolefin with 0-45 wt% of an aromatic vinyl compound as monomers in a hydrocarbon as a solvent, by using initiators: a reaction product [a1] between at least one secondary amine compound (A) and an organic lithium compound and/or a lithium amide compound [a2] of the at least one secondary amine compound (A) as well as a reaction product [b1] between at least one alcohol (B) and an organic lithium compound and/or a lithium alkoxide compound of the at least one alcohol (B). A rubber composition containing not less than 30 wt% of such a diolefin polymer or copolymer with respect to an entire rubber component is also disclosed. This rubber composition exhibits excellent abrasion resistance, high tensile strength, steering stability and low rolling resistance, and is suitable for tires, particularly, as treads of low fuel consumption tires.
一种生产二烯烃聚合物或共聚物的工艺,包括以下步骤:以烃类为溶剂,使用
引发剂使 55-100 wt%的共轭二烯烃与 0-45 wt%的芳香
乙烯基化合物作为单体聚合:至少一种仲胺化合物(A)与
有机锂化合物和/或至少一种仲胺化合物(A)的
锂酰胺化合物[a2]之间的反应产物[a1],以及至少一种醇(B)与
有机锂化合物和/或至少一种醇(B)的
锂烷氧基化合物之间的反应产物[b1]。此外,还公开了一种橡胶组合物,其中二烯烃聚合物或共聚物的含量不低于整个橡胶组分的 30%。这种橡胶组合物具有优异的耐磨性、高拉伸强度、转向稳定性和低滚动阻力,适用于轮胎,特别是低油耗轮胎的胎面。