A process for polymerizing olefins

C - Chemistry – Metallurgy – 08 – F

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C08F 4/60 (2006.01) C07F 7/08 (2006.01) C07F 7/30 (2006.01) C08F 10/00 (2006.01) C08F 4/619 (2006.01) C08F 4/6192 (2006.01) C08F 110/02 (2006.01)

Patent

CA 2277886

A process for polymerizing olefins by bringing olefins into contact with a transition metal catalyst and a cocatalyst, characterized in that the cocatalyst is a compound in accordance with formula XR4, wherein X is Si, Ge, Sn or Pb, and R is hydrogen or an alkyl, aryl, arylalkyl or alkylaryl group and wherein at least one R group is not hydrogen and contains one or more halogen atoms or the cocatalyst is a compound in accordance with formula [XR5]- [Y]+, wherein X is Si, Ge, Sn or Pb, R is hydrogen or an alkyl, aryl, arylalkyl or alkylaryl group and wherein at least one R group is not hydrogen and contains one or more halogen atoms, and Y is a cation.

Procédé pour polymériser les oléfines, selon lequel on met des oléfines en contact avec un catalyseur contenant un métal de transition et avec un cocatalyseur. Le procédé est caractérisé par le fait que le cocatalyseur est un composé de formule XR¿4?, dans laquelle X est Si, Ge, Sn ou Pb, et R est hydrogène ou un groupe alkyle, aryle, arylalkyle ou alkylaryle, et au moins un groupe R n'est pas hydrogène et contient un ou plusieurs atomes d'halogène; ou bien le cocatalyseur est un composé de formule [XR¿5?]?-¿[Y]?+¿, dans laquelle X est Si, Ge, Sn ou Pb, R est hydrogène ou un groupe alkyle, aryle, arylalkyle ou alkylaryle, et au moins un groupe R n'est pas hydrogène et contient un ou plusieurs atomes d'halogène, et Y est un cation.

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