1
Ching Tai Lue, Donna J Crowther: Mixed catalysts and their use in a polymerization process. Univation Technologies, Jaimes Sher, March 27, 2001: US06207606 (108 worldwide citation)

The present invention relates to a mixed catalyst system of at least one bridged, bulky ligand metallocene-type compound, and at least one bridged, asymmetrically substituted, bulky ligand metallocene-type compound, a method of making the mixed catalyst system and to its use in a polymerization proc ...


2
Donald R Loveday, David H McConville: Mixed catalyst compounds, catalyst systems and their use in a polymerization process. Univation Technologies, Jaimes Sher, Lisa Kimes Jones, August 7, 2001: US06271323 (89 worldwide citation)

The present invention relates to mixed catalyst compositions of a Group 15 containing hafnium catalyst compound and a bulky ligand metallocene-type catalyst compound, a unsupported and supported catalyst systems thereof and to a process for polymerizing olefin(s) utilizing them.


3
Donald R Loveday, David H McConville, John F Szul, Kersten Anne Erickson, Simon Mawson, Tae Hoon Kwack, Frederick J Karol, David James Schreck: Catalyst composition, method of polymerization, and polymer therefrom. Univation Technologies, Lisa Kimes Jones, Jaimes Sher, August 14, 2001: US06274684 (87 worldwide citation)

Catalyst compositions and methods, useful in polymerization processes, utilizing at least two metal compounds are disclosed. At least one of the metal compounds is a Group 15 containing metal compound and the other metal compound is preferably a bulky ligand metallocene-type catalyst. The invention ...


4
Rex E Murray, Simon Mawson, John F Szul, Kersten Anne Erickson, Tae Hoon Kwack, Frederick J Karol, David James Schreck: Multiple catalyst system. Univation Technologies, Jaimes Sher, Lisa Kimes Jones, January 22, 2002: US06340730 (84 worldwide citation)

This invention relates to a process to polymerize olefins comprising reacting olefins with a catalyst system comprising an activator, a metallocene and a second metal compound based on bidentate ligands containing heterocycle moieties.


5
Donald R Loveday, Moses Olukayode Jejelowo, Sun Chueh Kao: Polymerization catalyst systems comprising substituted hafnocenes. Univation Technologies, Jaimes Sher, Lisa Kimes Jones, June 19, 2001: US06248845 (79 worldwide citation)

The present invention relates to a process for the polymerization of monomers utilizing a bulky ligand hafnium transition metal metallocene-type catalyst compound, to the catalyst compound itself and to the catalyst compound in combination with an activator. The invention is also directed to an ethy ...


6
David H McConville, Matthew W Holtcamp, Donald R Loveday: Catalyst systems and their use in a polymerization process. Univation Technologies, Jaimes Sher, Lisa Kimes Jones, April 30, 2002: US06380328 (78 worldwide citation)

The present invention relates to mixed catalyst system of a Group 15 containing metal catalyst compound, a bulky ligand metallocene-type catalyst compound, and a Lewis acid aluminum containing activator and to a supported version thereof and for their use in a process for polymerizing olefin(s).


7
Agapios K Agapiou, Chi I Kuo, David M Glowczwski, Steve K Ackerman: Catalyst composition and methods for its preparation and use in a polymerization process. Univation Technologies, Jaimes Sher, Lisa Kimes Jones, October 9, 2001: US06300436 (63 worldwide citation)

The present invention relates to a catalyst composition and a method for making the catalyst composition of a polymerization catalyst and a carboxylate metal salt. The invention is also directed to the use of the catalyst composition in the polymerization of olefin(s). In particular, the polymerizat ...


8
Moses Olukayode Jejelowo, Sun Chueh Kao: Polymerization catalyst systems comprising substituted hafinocenes. Univation Technologies, Jaimes Sher, Lisa Kimes Jones, June 5, 2001: US06242545 (62 worldwide citation)

The present invention relates to a process for the polymerization of monomers utilizing a bulky ligand hafnium transition metal metallocene-type catalyst compound, to the catalyst compound itself and to the catalyst compound in combination with an activator. The hafnocene comprises at least one cycl ...


9
David H McConville, Richard R Schrock: Method of polymerization. Univation Technologies, August 7, 2001: US06271325 (58 worldwide citation)

This invention relates to a composition of matter represented by the formula below, and to a polymerization process comprising combining an olefin in the gas or slurry phase with an activator, a support and a compound represented by the following formula:


10
Donna J Crowther, Ching Tai Lue: Polymerization process for producing easier processing polymers. Univation Technologies, Jaimes Sher, Lisa Kimes Jones, January 15, 2002: US06339134 (57 worldwide citation)

The present invention relates to a process for polymerizing olefin(s) utilizing a cyclic bridged metallocene-type catalyst system to produce enhanced processability polymers.