Supported polymerisation catalysts

C - Chemistry – Metallurgy – 08 – F

Patent

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C08F 10/00 (2006.01) C08F 4/60 (2006.01) C08F 210/16 (2006.01) C08F 4/659 (2006.01) C08F 4/6592 (2006.01)

Patent

CA 2496468

An improved method for the preparation of a supported polymerisation catalyst system comprises the combination of (i) a porous support (ii) a polymerisable monomer, (iii) a polymerisation catalyst, and (iv) a cocatalyst, characterised in that the polymerisable monomer is added to the porous support before addition of one or both of the polymerisation catalyst and the cocatalyst. The preferred polymerisation catalyst is a metallocene complex and the preferred porous support is silica. The resultant supported catalysts are stable over long periods of time. The supported catalysts are particularly suitable for use in the gas phase.

L'invention concerne un procédé amélioré pour la préparation d'un système catalyseur de polymérisation supporté comprenant la combinaison (i) d'un support poreux, (ii) d'un monomère polymérisable, (iii) d'un catalyseur de polymérisation, et (iv) d'un cocatalyseur. Ledit procédé est caractérisé en ce que le monomère polymérisable est ajouté au support poreux avant l'ajout du catalyseur de polymérisation et du cocatalyseur ou des deux. Le catalyseur de polymérisation préféré est un complexe de métallocènes et le support poreux préféré est la silice. Les catalyseurs supportés résultants sont stables sur des longues périodes de temps. Les catalyseurs supportés conviennent en particulier à une utilisation en phase gazeuse.

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