Morphology-controlled olefin polymerization catalyst formed...

C - Chemistry – Metallurgy – 08 – F

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C08F 4/603 (2006.01) C08F 4/643 (2006.01) C08F 10/00 (2006.01)

Patent

CA 2234769

A solid, hydrocarbon-insoluble, olefin-polymerization catalyst component having substantially uniform particles useful in polymerizing olefins is formed by: reacting a magnesium-containing compound with carbon dioxide or sulfur dioxide; forming a two-phase mixture of the resulting magnesium- containing compound with a suitable liquid hydrocarbon-miscible phase and a suitable polar solvent phase; forming particles by adding the two-phase mixture after vigorous agitation to a liquid hydrocarbon; and contacting the formed particles at least once with a transition metal halide in the presence of an electron donor.

L'invention porte sur un catalyseur de polymérisation des oléfines, solide et insoluble dans les hydrocarbures, fait de particules sensiblement uniformes et qu'on obtient: en faisant réagir un composé contenant du magnésium avec du CO¿2? ou du SO¿2?; en formant un mélange à deux phases du composé contenant du magnésium avec une phase liquide miscible dans les hydrocarbures et une phase adéquate de solvant polaire; en formant les particules par adjonction du mélange à deux phases après agitation vigoureuse à un hydrocarbure liquide; et en mettant les particules ainsi formées en contact au moins une fois avec un halogénure de métal de transition en présence d'un donneur d'électrons.

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