Phillips Petroleum Company

Bryan E Hauger

M Bruce Welch

Helmut G Alt

Syriac J Palackal

Alexander K&ouml;ppl

Ronald D Knudsen

Roland Schmidt

Rex L Bobsein

David C Rohlfing

William R Coutant

David W Dockter

Nancy W Eilerts

Michael Jung

Harold R Deck

Erik Licht

Alexander Köppl

Ulrich Hammon

Randall S Muninger

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

A process for producing a new metallocene comprising reacting a first bridged metallocene which has an olefinically unsaturated with about two molar equivalents of an alkali metal alkyl, catalyst systems resulting from the combination of the resulting metallocenes and a cocatalyst, and polymerization processes using such catalyst systems are disclosed.

Oligomeric metallocenes and their use

Complexes of pyridldiimines with vanadium and other transition metals, and their use as olefin oligomerization and polymerization catalysts

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

A process is provided to prepare polyolefins having a multimodal molecular weight distribution comprising contacting at least one mono-1-olefin in a polymerization zone, under polymerization conditions, with a dual catalyst system comprising a first catalyst system which comprises a metallocene catalyst and a cocatalyst and a second catalyst system which comprises diimine nickel complexes which further comprise additional ligands selected from the group consisting of &prop;-deprotoned-&bgr;-diketones, &prop;-deprotoned-&bgr;-ketoesters, halogens and mixtures thereof. The resultant, recovered polymer has at least a bimodal, or broad, molecular weight distribution.

Polymerization catalyst system and polymerization process

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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Claremore, OK, United States of America

Bryan E Hauger