A process and catalyst system is disclosed herein for the preparation of (co)polymers having a 1,2-microstructure of between 20 and 90 percent. These (co)polymers are prepared in a hydrocarbon or non-polar solvent from a monomer system which contains at least one 1,3-diene monomer. The catalyst system which is employed in the production of the (co)polymers of the present invention is a combination of a chelated lithium alkoxide diamine modifier and an anionic initiator based on lithium.
本文公开了一种用于制备 1,2-微结构含量在 20%至 90%之间的(共)聚合物的工艺和催化剂系统。这些(共)聚合物是在烃类或非极性溶剂中,从含有至少一种 1,3-二烯单体的单体体系中制备出来的。生产本发明的(共)聚合物时使用的催化剂体系是一种螯合烷氧基二胺
锂改性剂和一种基于
锂的阴离子
引发剂的组合。