Ethylene based copolymers having high molecular weights, narrow molecular weight distributions, and a very good homogeneous distribution of the comonomer units can be obtained in high yields at temperatures of industrial interest, by carrying out the polymerization reaction in the presence of metallocene catalysts comprising particular bridged bis-indenyl compounds substituted in the 3-position on the indenyl groups.
在工业感兴趣的温度下,在存在特定的桥式双茂配合物催化剂的情况下进行聚合反应,可以获得具有高分子量、窄分子量分布和共聚单体单元非常均匀分布的
乙烯基共聚物,并且产率很高。其中,该催化剂包括在茂基团的3位上取代的特定桥式双茂化合物。