Dual donor catalyst system for the polymerization of olefins

Details Dual donor catalyst system for the polymerization of olefins Dual donor catalyst system for the polymerization of olefins

C - Chemistry, Metallurgy

08

F

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

Patent

CA 2182717

The present invention provides a catalyst system that exhibits unexpected control of desired properties in polyolefin products. The catalyst system includes a titanium-supported catalyst in combination with a mixture of tetraethoxysilane (TEOS) and dicyclopentyldimethoxy-silane (DCPMS). This catalyst system has been found to be effective in making polypropylene and polypropylene copolymers havlng relatively high melt flow rates and moderately broad molecular weight distribution.

La présente invention concerne un système catalyseur qui permet une modulation inattendue des caractéristiques désirées dans des produits polyoléfiniques. Ce système catalyseur comprend un catalyseur à support titane en association avec un mélange de tétraéthoxysilane (TEOS) et de dicyclopentyldiméthoxy-silane (DCPMS). Ce système catalyseur s'est avéré efficace pour fabriquer du polypropylène et des copolymères de polypropylène présentant des vitesses de fusion relativement élevées et une distribution moléculaire modérément large.

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