Supported metallocene-ligand catalyst composition

Details Supported metallocene-ligand catalyst composition Supported metallocene-ligand catalyst composition

C - Chemistry, Metallurgy

08

F

C08F 4/659 (2006.01) C08F 2/00 (2006.01) C08F 10/00 (2006.01)

Patent

CA 2614717

A supported catalyst composition having improved flow properties is disclosed comprising an alkylalumoxane, a metallocene-ligand an inorganic oxide support having an average particle size of from 0.1 to 100 µm and calcined at a temperature of 600°C or greater, and optionally an antifoulant agent. In one embodiment, the metallocene-ligand is a Group 4, 5 or 6 metallocene-ligand, and in another embodiment is a hafnocene- ligand. Also disclosed is a method of polymerization using such a supported catalyst compositions.

L'invention concerne une composition de catalyseur supporté présentant une fluidité améliorée, ladite composition comprenant un alkylalumoxane, un métallocène-alkyle, et un support d'oxyde inorganique ayant une taille de particules moyenne comprise entre environ 0,1 et 100 µm et étant calciné à une température d'au moins 600 °C, et éventuellement un agent anti-encrassement. Selon un mode de réalisation, le métallocène-alkyle est un métallocène-alkyle du Groupe 4, 5, ou 6, et selon un autre mode de réalisation, il s'agit d'un hafnocène-alkyle. L'invention concerne également un procédé de polymérisation utilisant une telle composition de catalyseur supporté.

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