A polymerization process

C - Chemistry – Metallurgy – 08 – F

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C08F 4/80 (2006.01) C08F 210/02 (2006.01)

Patent

CA 2338847

The invention relates to a process for the polymerization of ethene and optionally one or more other olefin monomers by contacting the monomers under polymerization conditions with a catalyst system obtainable by combining: (a) a palladium, nickel or platinum ion, (b) an anion derived from an acid having a pKa of less than 3, and containing an atom of Group V A of the Periodic Table of Elements, wherein the Group V A atom is substituted with at least one aryl group, said aryl groups being substituted with a polar group on the ortho position. The invention also relates to a novel class of cyclic olefin copolymers, containing functional groups, which are obtainable with the above process.

L'invention concerne un procédé de polymérisation d'éthène et éventuellement d'un ou de plusieurs autres monomères oléfiniques, ce procédé consistant à mettre en contact les monomères, dans des conditions de polymérisation, avec un système de catalyse que l'on peut obtenir en combinant: (a) un ion palladium, nickel ou platine, et (b) un anion dérivé d'un acide possédant un pKa inférieur à 3 et contenant un atome du groupe V A du tableau périodique des éléments, lequel atome est substitué par au moins un groupe aryle, les groupes aryles étant substitués par un groupe polaire en position ortho. L'invention concerne également une nouvelle classe de copolymères oléfiniques cycliques, contenant des groupes fonctionnels, et que l'on peut obtenir à l'aide du procédé ci-dessus.

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