Use of homogeneous catalytic systems which include as a pre-catalyst a complex of a Group IV metal and a salalen ligand in the polymerization of alpha-olefins, is disclosed. The alpha-olefin polymers obtained are characterized by controlled levels of tacticity. Also disclosed are novel salalen ligands and novel complexes thereof with Group IV metals.
本发明揭示了在α-烯烃聚合中使用包括群四
金属和Salalen
配体复合物作为前催化剂的均相催化体系。所得的α-烯烃聚合物具有受控的立构度
水平。还公开了新型Salalen
配体以及与群四
金属形成的新型配合物。