Process for the polymerisation of alpha-olefins

Details Process for the polymerisation of alpha-olefins Process for the polymerisation of alpha-olefins

C - Chemistry, Metallurgy

08

F

C08F 4/62 (2006.01) C08F 10/00 (2006.01) C08F 10/14 (2006.01) C08F 4/639 (2006.01) C08F 4/6392 (2006.01) C08F 110/14 (2006.01) C08F 210/14 (2006.01)

Patent

CA 2253576

The present process for the preparation of polymers of alpha-olefins involves contacting, under effective polymerization conditions, at least one .alpha.- olefin having from 4 to 30 carbon atoms with a catalyst comprising a transition metal complex and a co-catalyst. The transition metal complex contemplated for use in the process consists of a reduced valency transition metal, selected from groups 4-6 of the Periodic Table of the Elements, with a multidentate monoanionic ligand and with two monoanionic ligands. In particular the reduced transition metal is titanium Ti+3.

L'invention concerne un procédé de préparation de polymères d'.alpha.-oléfines consistant à mettre en contact, dans des conditions de polymérisation efficace, au moins une .alpha.-oléfine ayant de 4 à 30 atomes de carbone avec un catalyseur comprenant un complexe d'un métal de transition et un cocatalyseur. Le complexe d'un métal de transition approprié dans ce procédé consiste en un métal de transition à valence réduite sélectionné dans les groupes 4 à 6 de la table périodique des éléments, avec un ligand monoanionique multidenté et avec deux ligands monoanioniques. En particulier, le métal de transition à valence réduite est le titane Ti?+3¿.

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