1
Marc L DeChellis, John R Griffin: Process for polymerizing monomers in fluidized beds. Exxon Chemical Patents, Jaimes Sher, October 4, 1994: US05352749 (502 worldwide citation)

The invention is directed toward polymerizing or copolymerizing alpha-olefins either alone or in combination with one or more other alpha-olefins in a gas phase reactor having a fluidized bed and a fluidizing medium such that the fluidizing medium entering the reactor comprises a gas and a liquid ph ...


2
Howard C Welborn Jr: Supported polymerization catalyst. Exxon Chemical Patents, M B Kurtzman, February 28, 1989: US04808561 (464 worldwide citation)

An olefin polymerization supported catalyst comprising a support and the reaction product of a metallocene of Group 4b, 5b or 6b of the Periodic Table and an alumoxane, said reaction product formed in the presence of a support.


3
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 ...


4
Howard C Welborn Jr, John A Ewen: Process and catalyst for polyolefin density and molecular weight control. Exxon Chemical Patents, Myron B Kurtzman, Charles M Cox, Ben C Cadenhead, June 28, 1994: US05324800 (420 worldwide citation)

Catalysts comprising (a) derivatives of mono, bi and tricyclopentadienyl coordination complexes with a transition metal and (b) and an alumoxane are employed in a process of producing polyolefins of controlled molecular weight.


5
John R Griffin, Marc L DeChellis: Process for polymerizing monomers in fluidized beds. Exxon Chemical Patents, Jaimes Sher, July 25, 1995: US05436304 (409 worldwide citation)

The invention is directed toward polymerizing or copolymerizing alpha-olefins either alone or in combination with one or more other alpha-olefins in a gas phase reactor having a fluidized bed and a fluidizing medium such that the fluidizing medium entering the reactor comprises a gas and a liquid ph ...


6
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 ...


7
Jo Ann M Canich: Olefin polymerization catalysts. Exxon Chemical Patents, October 8, 1991: US05055438 (339 worldwide citation)

The invention is a polymerization catalyst system including an alumoxane and a Group IV B metallocene having a heteroatom ligand. The catalyst system can be employed to polymerize olefins to produce a high molecular weight polymer.


8
Jo Ann M Canich, Gary F Licciardi: Mono-Cp heteroatom containing group IVB transition metal complexes with MAO: supported catalyst for olefin polymerization. Exxon Chemical Patents, Myron B Kurtzman, October 15, 1991: US05057475 (312 worldwide citation)

The invention is a supported catalyst system including an inert support material, a Group IV B transition metal component and an alumoxane component which may be employed to polymerize olefins to produce a high molecular weight polymer.


9
Howard C Welborn Jr: Silicon-bridged transition metal compounds. Exxon Chemical Patents, M B Kurtzman, May 21, 1991: US05017714 (307 worldwide citation)

Silicon-bridged transition metal compounds and their use as .alpha.-olefin polymerization catalysts are disclosed. A chiral silicon-bridged metallocene catalyst polymerizes .alpha.-olefins to high isotacity with a minimum of inversions at high rates of catalyst activity. The catalyst is easily made ...


10
Jo Ann M Canich: Monocyclopentadienyl transition metal olefin polymerization catalysts. Exxon Chemical Patents, Jaimes Sher, Myron B Kurtzman, March 17, 1992: US05096867 (277 worldwide citation)

The invention is a catalyst system including a Group IV B transition metal component and an alumoxane component which may be employed to polymerize olefins to produce a high molecular weight polymer.