(cycloakyl)methyl silanes as external donors for polyolefin...

C - Chemistry – Metallurgy – 08 – F

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C08F 4/646 (2006.01) C08F 10/00 (2006.01) C08F 110/06 (2006.01)

Patent

CA 2420143

One aspect of the present invention relates to a catalyst system for use in olefinic polymerization, containg a solid titanium catalyst component; an organoaluminum compound having at least one aluminun-carbon bond; and an organosilicon compound comprising a (cycloalkyl)methyl group. Another aspect of the present invention relates to a method of making a catalyst for use in olefinic polymerization, involving the steps of reacting a Grignard reagent having a (cycloalkyl)methyl group with an orthosilicate to provide an organosilicon compound having a (cycloalkyl)methyl moiety; and combining the organosilicon compound with an organoaluminum compound having at least one aluminum-carbon bond and a solid titanium catalyst component to form the catalyst.

Un mode de réalisation de l'invention concerne un système de catalyseur à utiliser dans une polymérisation oléfinique, comprenant un composant du catalyseur au titane solide; un composant organoaluminium présentant au moins une liaison aluminium-carbone; et un composant organosilicium comprenant un groupe (cycloalkyl)méthyl. Un autre mode de réalisation de l'invention concerne un procédé de préparation d'un catalyseur à utiliser dans une polymérisation oléfinique, comprenant les étapes consistant à faire réagir un réactif de Grignard présentant un groupe (cycloalkyl)méthyl avec un orthosilicate, de manière à obtenir un composant organosilicium à fraction (cycloalkyl)méthyl; et à combiner le composant organosilicium avec un composant organoaluminum présentant au moins une liaison aluminum-carbone et un composant du catalyseur au titane solide, en vue de former le catalyseur.

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