A novel method for the preparation of heterogeneous metallocene catalysts is described that can be applied for the polymerization of olefins starting with homogeneous metallocene complexes. For this purpose zirconocene dichloride complexes have been prepared containing alkenyl or alkynyl substituents. These complexes can be activated with methyl alumoxane (MAO) and then are incorporated as comonomers
POLYMERIZATION CATALYSTS FOR PRODUCING POLYMERS WITH HIGH COMONOMER INCORPORATION
申请人:Yang Qing
公开号:US20110201833A1
公开(公告)日:2011-08-18
The present techniques relate to catalyst compositions, methods, and polymers encompassing a Group 4 metallocene compound comprising bridged η
5
-cyclopentadienyl-type ligands, typically in combination with a cocatalyst, and an activator. The bridged η
5
-cyclopentadienyl-type ligands are connected by a cyclic substituent.