Phillips Petroleum Company

David W Dockter

M Bruce Welch

Bryan E Hauger

Syriac J Palackal

Helmut G Alt

Mitchell D Refvik

Alexander K&ouml;ppl

David C Rohlfing

Michael Jung

Randall S Muninger

Alexander Köppl

Antoni Jurkiewicz

Metallocene having two cyclic dienyl groups connected by a single carbon having an aryl substituent and a terminally unsaturated hydrocarbyl substituent, olefin polymerization catalyst systems prepared therefrom, and the use of such catalyst systems are disclosed.

Metallocenes, polymerization catalyst systems, their preparation, and use

Detergent additive composition and processes therefore and therewith

Method and catalyst system for producing polyolefins with broadened molecular weight distributions

The present invention provides a new type of supported metallocene catalyst system. In one aspect of the invention, an inorganic oxide support, such as silica, is impregnated with a Group XIII element such as B, Al or GA. The support is then contacted with a liquid catalyst system prepared by combining in a liquid an organo aluminoxane and a metallocene having two cyclopetadienyl-type ligands selected from substituted or unsubstituted cyclopentadienyl, indenyl, benzoindenyl, tetrahdroindenyl, benzofluorenyl, octahydrofluorenyl, and fluorenyl ligands to form a supported metallocene catalyst system. In preferred embodiments the process further includes conducting prepolymerization of at least one olefin in the presence of the supported metallocene catalyst system to produce a prepolymerized metallocene catalyst system. The prepolymerized metallocene catalyst system prepared in this manner yields substantially increased activity for the polymerization of olefins. In another aspect, the present invention also provides a method for polymerization of olefins using the inventive supported metallocene catalyst system.

Supported metallocene catalyst system and method for polymerizing olefins

Methods are disclosed for preparing a highly active solid metallocene-containing catalyst system and its use in the polymerization of olefins. The catalyst system is prepared by creating a catalyst system solution by combining an aluminoxane with a metallocene having a substituent which has olefinic unsaturation in a suitable liquid to form a liquid catalyst system, conducting prepolymerization of an olefin in the liquid catalyst system, and separating the resulting solid metallocene-containing catalyst system from the reaction mixture. Also polymerization of olefins using the inventive solid catalyst system is disclosed.

Method for making and using a supported metallcene catalyst system

Process for producing an olefin polymer using a metallocene

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Bartlesville, OK, United States of America

David W Dockter