Supported polymerisation catalysts

C - Chemistry – Metallurgy – 08 – F

Patent

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Details

C08F 4/02 (2006.01) C08F 4/645 (2006.01) C08F 10/00 (2006.01) C08F 10/14 (2006.01)

Patent

CA 2534836

A supported polymerisation catalyst system is prepared by a method comprising the following steps: (i) addition of a cocatalyst to a porous support, (ii) mixing a polymerisation catalyst with a polymerisable monomer, and (iii) contacting together the components resulting from steps (i) and (ii). The porous support is preferably silica and the polymerisation catalyst is preferably a metallocene. The polymerisable monomer is typically 1-hexene and the supported catalyst system provides advantages a slowly decaying activity profile particularly when operating in the gas phase.

L'invention concerne un système de catalyseur de polymérisation supporté. Ledit système est préparé selon un procédé consistant : (i) à ajouter un co-catalyseur à un support poreux, (ii) à mélanger un catalyseur de polymérisation avec un monomère polymérisable, et (iii) à mettre en contact les constituants obtenus lors des étapes (i) et (ii). Le support poreux est de préférence de la silice et le catalyseur de polymérisation est de préférence un métallocène. Le monomère polymérisable est généralement du 1-hexène et le système de catalyseur supporté a l'avantage de présenter un profil d'activité qui diminue lentement, en particulier, lors du fonctionnement en phase gazeuse.

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