Metallocene catalyst for the (co)polymerization of...

Details Metallocene catalyst for the (co)polymerization of... Metallocene catalyst for the (co)polymerization of...

C - Chemistry, Metallurgy

08

F

C08F 4/6592 (2006.01) C08F 10/00 (2006.01)

Patent

CA 2180671

A catalyst active in the (co)polymerization of .alpha.-olefins is obtained by putting the following components in contact with each other: (i) a "bridged" bis-metallocene derivative of a metal M selected from titanium, zirconium or hafnium, wherein the divalent "bridge" has a rigid structure linked to two .eta.5-cyclopentadienyl ring with two methylene groups having a distance from each other of less than 3.5 .ANG.; (ii) a co-catalyst consisting of an organic derivative of a metal M' selected from boron, aluminium, gallium and tin. Such a catalyst allows high polymerization rates to be reached and is particularly suitable for high temperature polymerization process and co-polymerization of ethylene with other .alpha.-olefins.

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