1
Howard W Turner, Gregory G Hlatky, Richard R Eckman: Ionic metallocene catalyst compositions. Exxon Chemical Patents, M Susan Spiering, Myron B Kurtzman, Ben C Cadenhead, March 30, 1993: US05198401 (428 worldwide citation)

Ionic catalyst compositions can be prepared by combining two components. The first component is a bis(cyclopentadienyl) Group IV-B metal complex containing at least one ligand which will combine irreversibly with the second component or at least a portion thereof such as a cation portion thereof. Th ...


2
Gregory G Hlatky, Howard W Turner: Catalyst system of enhanced productivity. Exxon Chemical Patents, B C Cadenhead, M B Kurtzman, M S Spiering, October 6, 1992: US05153157 (383 worldwide citation)

This invention relates to catalyst systems, and a method for using such system, for the enhanced production of homo and copolymer products of olefin, diolefin and/or acetylenically unsaturated monomers. This invention catalyst system comprises a Group III-A element compound for improving the product ...


3
Gregory G Hlatky, Howard W Turner: Catalyst system of enhanced productivity. Exxon Chemical Patents, M Susan Spiering, Myron B Kurtzman, August 31, 1993: US05241025 (182 worldwide citation)

This invention relates to catalyst systems, and a method for using such system, for the enhanced production of homo and copolymer products of olefin, diolefin and/or acetylenically unsaturated monomers. This invention catalyst system comprises a Group III-A element compound for improving the product ...


4
Howard W Turner, Gregory G Hlatky, Henry W H Yang, Avinash C Gadkari, Gary F Licciardi: Block copolymers from ionic catalysts. Exxon Chemical Patents, C L Bell, M B Kurtzman, M S Spiering, February 21, 1995: US05391629 (170 worldwide citation)

A process for the production of block copolymers of ethylene and an .alpha.-olefin such as propylene by using an ionic catalyst system including a metallocene component and a component having a cation capable of donating a proton and a compatible non-coordinating anion. Novel block copolymers are pr ...


5
Howard W Turner, Gregory G Hlatky: Catalysts, method of preparing these catalysts, and polymerization processes wherein these catalysts are used. Exxon Chemical Patents, M Susan Spiering, Myron B Kurtzman, January 11, 1994: US05278119 (166 worldwide citation)

The present invention relates to catalysts, to a method for preparing such catalysts, to a method of using such catalysts and to polymeric products produced with such catalysts. The catalysts are particularly useful in the polymerization of - olefins, diolefins and acetylenically unsaturated monomer ...


6
Donna J Crowther, Richard A Fisher, Jo Ann M Canich, Gregory G Hlatky, Howard W Turner: Transition metal olefin polymerization catalysts. Exxon Chemical Patents, F E Reid, M S Spiering, April 2, 1996: US05504049 (75 worldwide citation)

This invention relates to non-Group 4 transition metal compositions useful as olefin polymerization catalysts, wherein the transition metal is in a high oxidation state. The invention further relates to design of new ligand systems and methods of preparing and using the same. Compositions useful as ...


7
Howard W Turner, Gregory G Hlatky, Richard R Eckman: Ionic metallocene catalyst compositions. Exxon Chemical Patents, M Susan Spiering, W G Muller, January 24, 1995: US05384299 (66 worldwide citation)

Ionic catalyst compositions can be prepared by combining two components. The first component is a bis(cyclopentadienyl) Group IV-B metal complex containing at least one ligand which will combine irreversibly with the second component or at least a portion thereof such as a cation portion thereof. Th ...


8
Jo Ann M Canich, Howard W Turner, Gregory G Hlatky: Monocyclopentadienyl metal compounds for ethylene-.alpha.-olefin-copolymer production catalysts. Exxon Chemical Patents, April 15, 1997: US05621126 (49 worldwide citation)

Described are certain mono(cyclopentadienyl) Group IV B metal compounds, catalyst systems comprising such mono(cyclopentadienyl) metal compounds and an activator, and to a process using such catalyst systems for the production of polyolefins, particularly ethylene-.alpha.-olefin copolymers having a ...


9
Donna J Crowther, Richard A Fisher, Jo Ann M Canich, Gregory G Hlatky, Howard W Turner: Transition metal olefin polymerization processes. Exxon Chemical Patents, M S Spiering, F E Reid, March 26, 1996: US05502124 (31 worldwide citation)

This invention relates to processes using non-Group 4 transition metal compositions useful as olefin polymerization catalysts, wherein the transition metal is in a high oxidation state. The invention further relates to design of new ligand systems and methods of preparing and using the same. Composi ...


10
Howard W Turner, Gregory G Hlatky, Richard R Eckman: Ionic metallocene catalyst compositions. Exxon Chemical Patents, W G Muller, November 28, 1995: US05470927 (30 worldwide citation)

A method is disclosed for polymerizing olefins, diolefins, or acetylenically unsaturated monomers containing two or more carbon atoms, either alone or in combination with each other or with other polymerizable monomers, comprising contacting the monomers with an ionic polymerization catalyst compris ...