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
Howard W Turner: New polymerization catalyst. Exxon Chemical Patents, M B Kurtzman, June 21, 1988: US04752597 (241 worldwide citation)

An olefin polymerization catalyst comprising the reaction product of a metallocene complex of Group IVB, VB, VIb, and VIII of the Periodic Table and an excess of alumoxane.


4
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 ...


5
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 ...


6
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 ...


7
Howard W Turner, G Cameron Dales, Lynn VanErden, Johannes A M van Beek: Parallel reactor with internal sensing. Symyx Technologies, Senniger Powers Leavitt & Roedel, October 23, 2001: US06306658 (149 worldwide citation)

An apparatus and method for carrying out and monitoring the progress and properties of multiple reactions is disclosed. The method and apparatus are especially useful for synthesizing, screening, and characterizing combinatorial libraries, but also offer significant advantages over conventional expe ...


8
Jo Ann M Canich, Howard W Turner: Amido transition metal compound and a catalyst system for the production of isotatic polypropylene. Exxon Chemical Patents, Evan K Butts, June 7, 1994: US05318935 (121 worldwide citation)

Certain bridged and unbridged amido transition metal compounds of the Group IV-B metals are disclosed. These compounds may be used in a catalyst system comprising the amido transition metal compound and an alumoxane. Also disclosed is a process using the catalyst system for the production of high mo ...


9
Howard W Turner, Jo Ann M Canich, Bernard J Folie: High temperature polymerization process using ionic catalysts to produce polyolefins. Exxon Chemical Patents, M S Spiering, W G Muller, April 18, 1995: US05408017 (113 worldwide citation)

This invention relates to a process for polymerizing olefins at high pressures in a polymerization medium at high temperature utilizing an ionic olefin polymerization catalyst derived from the reaction of a cyclopentadienyl-containing transition metal compound having a hydrolyzable alkyl or hydride ...


10
Howard W Turner: Ionic metallocene catalyst compositions. Exxon Chemical Patents, Myron B Kurtzman, William G Muller, February 4, 1997: US05599761 (110 worldwide citation)

An ionic catalyst system component comprising a water-stable anion having a plurality of lipophilic radicals covalently coordinated to and shielding a central, formal charge bearing metal or metalloid atom, in which the lipophilic radicals of the anion include substituted aromatic radicals useful fo ...