Ziegler-natta catalyst compositions for producing...

C - Chemistry – Metallurgy – 08 – F

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C08F 4/654 (2006.01) C08F 4/656 (2006.01) C08F 10/00 (2006.01)

Patent

CA 2733208

Methods of preparing a polymerization catalyst component is provided, in which a magnesium component, a Lewis acid solubilizing component, a titanium compound, optionally a transition metal compound different than the titanium compound, and typically an inert filler are combined in a slurrying agent and spray- dried to produce a catalyst precursor in the form of a substantially spherical and porous solid particle. The methods and catalysts of this disclosure can provide ethylene homopolymer and copolymer resins having a high molecular weight tail and a broadened molecular weight distribution as compared to more tradi-tional Ziegler-Natta catalysts.

L'invention concerne des procédés de préparation d'un composant de catalyseur de polymérisation, dans lesquels un composé de magnésium, un composant de solubilisation d'acide de Lewis, un composant de titane, facultativement un composé de métal de transition différent du composé du titane, et typiquement une charge inerte, étant combinés en un agent de formation du boue et séchés par atomisation pour produire un précurseur de catalyseur sous la forme d'une particule solide sensiblement sphérique et poreuse. Les procédés et catalyseurs de cette divulgation peuvent fournir un homopolymère d'éthylène et des résines de copolymères ayant une queue de poids moléculaire élevé et une répartition de poids moléculaire élargie par comparaison aux catalyseurs de Ziegler-Natta plus habituels.

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