Catalyst comprising bridged indeno[1,2-b]indolyl metal complex

Details Catalyst comprising bridged indeno[1,2-b]indolyl metal complex Catalyst comprising bridged indeno[1,2-b]indolyl metal complex

C - Chemistry, Metallurgy

08

F

C08F 4/6592 (2006.01) C08F 4/02 (2006.01) C08F 210/16 (2006.01)

Patent

CA 2758167

A process for making ethylene copolymers is disclosed. Ethylene copolymerizes with an .alpha.-olefin in the presence of a catalyst system comprising an activator and a silica- supported, bridged indenoindolyl metal complex having "open architecture." The supported complex incorporates comonomers with exceptional efficiency, and the process gives ethylene copolymers having high molecular weights (Mw > 100K) and very low densities (< 0.910 g/cm3). Open architecture catalysts that include bridging through the indolyl nitrogen of the indenoindolyl framework are also described. Additionally, supported and unsupported indeno[1,2-b]indolyl catalysts provide exceptional activities in the preparation of elastomeric polypropylene and ethylene copolymers.

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