Polymerization catalyst systems, their production and use

Details Polymerization catalyst systems, their production and use Polymerization catalyst systems, their production and use

C - Chemistry, Metallurgy

08

F

C08F 4/622 (2006.01) C08F 4/629 (2006.01) C08F 10/00 (2006.01) C08F 4/619 (2006.01) C08F 4/6192 (2006.01)

Patent

CA 2202404

A process is provided herein for the preparation of a supported catalyst system useful for polymerizing olefins. The process comprises the steps of combining an alumoxane, a surface modifier, a porous carrier, and a metallocene catalyst component. The surface modifier is represented by the Formula: (SEE FORMULA I) wherein R3, R2 and R3 are as specifically defined in this specification. The metallocene catalyst component is represented by the following Formula: (SEE FORMULA I) wherein M1, R5 and R6 are as specifically defined in this specification; R7 is (see formula I) =BR11, =AlR11, -Ge-, -Sn-, -O-, -S-, =SO, =SO2, =NR11, =CO, PR11, or =P(O)R11; wherein R11, R12, R13 as specifically defined in this specification, or R11 and R12, or R11 and R13 as specifically defined in this specification, together with the atoms binding them, can form ring systems; and M2, R8, R9; m and n wherein further two adjacent R10 radicals can be joined together to form a ring system are as specifically defined in this specification. Such process provides for a supported bulky ligand transition metal catalyst which, when utilized in a polymerization process, substantially reduces the reactor fouling and sheeting in a gas, slurry or liquid pool polymerization process.

La présente invention concerne généralement un système catalyseur supporté utilisable pour la polymérisation des oléfines. Le procédé de support du catalyseur permet d'obtenir un catalyseur supporté en métal de transition ligand volumineux qui, lorsqu'il est utilisé dans un processus de polymérisation, réduit sensiblement l'encrassement et la stratification du réacteur lors d'un processus de polymérisation en bain liquide, en suspension ou en phase gazeuse.

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