1
Qing Yang, Kumudini C Jayaratne, Michael D Jensen, Max P McDaniel, Joel L Martin, Matthew G Thorn, Jerry T Lanier, Tony R Crain: Dual metallocene catalysts for polymerization of bimodal polymers. Chevron Phillips Chemical Company, Merchant & Gould P C, November 17, 2009: US07619047 (138 worldwide citation)

This invention relates to catalyst compositions, methods, and polymers encompassing at least one first Group 4 metallocene compound comprising bridging η5-cyclopentadienyl-type ligands, in combination with at least one second Group 4 metallocene with non-bridging η5-cyclopentadienyl-type ligands, ty ...


2
Joel L Martin, Matthew G Thorn, Max P McDaniel, Michael D Jensen, Qing Yang, Paul J DesLauriers, Mark E Kertok: Polymerization catalysts and process for producing bimodal polymers in a single reactor. Chevron Phillips Chemical Company, Merchant & Gould, December 25, 2007: US07312283 (119 worldwide citation)

Catalyst compositions comprising a first metallocene compound, a second metallocene compound, an activator-support, and an organoaluminum compound are provided. Methods for preparing and using such catalysts to produce polyolefins are also provided. The compositions and methods disclosed herein prov ...


3
Qing Yang, Michael D Jensen, Joel L Martin, Matthew G Thorn, Max P McDaniel, Youlu Yu, David C Rohlfing: Polymerization catalysts for producing high molecular weight polymers with low levels of long chain branching. Chevron Phillips Chemical Company, Merchant & Gould P C, April 14, 2009: US07517939 (110 worldwide citation)

This invention relates to catalyst compositions, methods, and polymers encompassing at least one Group 4 metallocene compound comprising bridging η5-cyclopentadienyl-type ligands, typically in combination with at least one cocatalyst, and at least one activator. The compositions and methods disclose ...


4
Michael D Jensen, Max P McDaniel, Joel L Martin, Elizabeth A Benham, Randy Muninger, Gary Jerdee, Ashish M Sukhadia, Qing Yang, Matthew G Thorn: Catalyst compositions and polyolefins for extrusion coating applications. Chevron Phillips Chemical Company, Womble Carlyle Sandridge & Rice PLLC, May 9, 2006: US07041617 (98 worldwide citation)

This invention relates to the field of olefin polymerization catalyst compositions, and methods for the polymerization and copolymerization of olefins, including polymerization methods using a supported catalyst composition. In one aspect, the present invention encompasses a catalyst composition com ...


5
Qing Yang, Michael D Jensen, Matthew G Thorn, Max P McDaniel, Joel L Martin, Tony R Crain: Polymerization catalysts for producing high melt index polymers without the use of hydrogen. Chevron Phillips Chemical Company, Womble Carlye Sandridge & Rice PLLC, April 11, 2006: US07026494 (94 worldwide citation)

Various catalyst compositions including the contact product of at least one ansa-metallocene compound, at least one organoaluminum compound, and at least one activator-support are disclosed. Processes for forming such compositions and for forming polyolefins with such compositions are also disclosed ...


6
Qing Yang, Kumudini C Jayaratne, Michael D Jensen, Max P McDaniel, Joel L Martin, Matthew G Thorn, Jerry T Lanier, Tony R Crain: Dual metallocene catalysts for polymerization of bimodal polymers. Chevron Phillips Chemical Company, Merchant & Gould P C, June 14, 2011: US07960487 (72 worldwide citation)

This invention relates to catalyst compositions, methods, and polymers encompassing at least one first Group 4 metallocene compound comprising bridging η5-cyclopentadienyl-type ligands, in combination with at least one second Group 4 metallocene with non-bridging η5-cyclopentadienyl-type ligands, ty ...


7
Michael D Jensen, Joel L Martin, Max P McDaniel, Qing Yang, Matthew G Thorn, Elizabeth A Benham, Ted H Cymbaluk, Ashish M Sukhadia, Rajendra K Krishnaswamy, Mark E Kertok: Dual metallocene catalyst for producing film resins with good machine direction (MD) elmendorf tear strength. Womble Carlyle Sandridge & Rice PLLC, October 10, 2006: US07119153 (70 worldwide citation)

This invention relates to catalyst compositions comprising a first metallocene compound, a second metallocene compound, at least one chemically-treated solid oxide, and at least one organoaluminum compound. This invention also relates to methods to prepare and use the catalyst compositions and new p ...


8
Joel L Martin, Elizabeth A Benham, Mark E Kertok, Michael D Jensen, Max P McDaniel, Gil R Hawley, Qing Yang, Matthew G Thorn, Ashish M Sukhadia: Resins that yield low haze films and the process for their production. Chevron Phillips Chemical Company, Merchant & Gould, April 3, 2007: US07199073 (55 worldwide citation)

Catalyst compositions comprising a first metallocene compound, a second metallocene compound, a third metallocene compound, a chemically-treated solid oxide, and an organoaluminum compound are provided. Methods for preparing and using the catalyst and polyolefins are also provided. The compositions ...


9
Matthew G Thorn, Joel L Martin, Qing Yang, Albert P Masino: -metallocenes and their parent ligands in high yield, Synthesis of. Chevron Phillips Chemical Company, Womble Carlyle Sandridge & Rice PLLC, June 20, 2006: US07064225 (51 worldwide citation)

The present invention provides a method of making compounds comprising linked cyclopentadienyl and fluorenyl groups, including substituted analogs thereof, which are precursors to ansa-metallocenes comprising bridged cyclopentadienyl and fluorenyl ligands. In one aspect, this invention provides a pr ...


10
Michael D Jensen, Joel L Martin, Max P McDaniel, David C Rolfing, Qing Yang, Matthew G Thorn, Ashish M Sukhadia, Youlu Yu, Jerry T Lanier: Polymerization catalysts for producing polymers with low levels of long chain branching. Chevron Phillips Chemical Company, Womble Carlyle Sandridge & Rice PLLC, December 12, 2006: US07148298 (47 worldwide citation)

This invention relates to catalyst compositions, methods, and polymers encompassing a Group 4 metallocene with bridging η5-cyclopentadienyl-type ligands, in combination with a cocatalyst and an activator-support. The compositions and methods disclosed herein provide ethylene polymers with low levels ...