Polyolefins with high levels of long chain branching

Details Polyolefins with high levels of long chain branching Polyolefins with high levels of long chain branching

C - Chemistry, Metallurgy

08

F

C08F 10/00 (2006.01) C08F 4/626 (2006.01)

Patent

CA 2528502

The present invention provides a method of forming a polyolefin resin having a relatively high densities and a long chain branch index ("LCB") greater than about 1. The method of the invention comprises forming a reaction mixture by combining molecular hydrogen, a first olefin, an optional second olefin, a diluent, and a vanadium-containing catalyst system at a sufficient temperature to allow formation of the polyolefin resin and initiating polymerization of the reaction mixture.

L'invention concerne un procédé permettant de produire une résine polyoléfinique présentant des densités relativement élevées, et un indice de branches longues supérieur à environ 1. Le procédé décrit consiste à former un mélange réactionnel en combinant de l'hydrogène moléculaire, une première oléfine, une second oléfine facultative, et un système catalyseur contenant du vanadium, à une température suffisante pour permettre la formation d'une résine polyoléfinique, et à amorcer la polymérisation du mélange réactionnel.

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