1
Kumudini C Jayaratne, Michael D Jensen, Qing Yang: Polymerization catalysts and process for producing bimodal polymers in a single reactor. Chevron Phillips Chemical Company, Merchant & Gould, June 5, 2007: US07226886 (143 worldwide citation)

Catalyst compositions comprising a first metallocene compound, a second metallocene compound, an activator-support, and an organoaluminum compound are provided. An improved method for preparing cyclopentadienyl complexes used to produce polyolefins is also provided.


2
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 ...


3
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 ...


4
Rex E Murray, Kumudini C Jayaratne, Qing Yang, Joel L Martin, Gary L Glass: Nano-linked heteronuclear metallocene catalyst compositions and their polymer products. Chevron Phillips Chemical Company, Merchant & Gould P C, April 5, 2011: US07919639 (61 worldwide citation)

The present invention provides polymerization catalyst compositions employing novel heterodinuclear metallocene compounds. Methods for making these new dinuclear metallocene compounds and for using such compounds in catalyst compositions for the polymerization of olefins are also provided.


5
Rex E Murray, Kumudini C Jayaratne, Qing Yang, Joel L Martin: Nano-linked metallocene catalyst compositions and their polymer products. Chevron Phillips Chemical Company, Merchant & Gould P C, December 20, 2011: US08080681 (55 worldwide citation)

The present invention provides polymerization catalyst compositions employing novel dinuclear metallocene compounds. Methods for making these new dinuclear metallocene compounds and for using such compounds in catalyst compositions for the polymerization and copolymerization of olefins are also prov ...


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, March 20, 2012: US08138113 (37 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
Kumudini C Jayaratne, Michael D Jensen, Qing Yang: Polymerization catalysts and process for producing bimodal polymers in a single reactor. Chevron Phillips Chemical Company, Merchant & Gould P C, April 21, 2009: US07521572 (34 worldwide citation)

Catalyst compositions comprising a first metallocene compound, a second metallocene compound, an activator-support, and an organoaluminum compound are provided. An improved method for preparing cyclopentadienyl complexes used to produce polyolefins is also provided.


8
Rex E Murray, Kumudini C Jayaratne, Qing Yang, Joel L Martin: Nano-linked metallocene catalyst compositions and their polymer products. Chevron Phillips Chemical Company, Merchant & Gould P C, January 4, 2011: US07863210 (32 worldwide citation)

The present invention provides polymerization catalyst compositions employing novel dinuclear metallocene compounds. Methods for making these new dinuclear metallocene compounds and for using such compounds in catalyst compositions for the polymerization and copolymerization of olefins are also prov ...


9
Rex E Murray, Kumudini C Jayaratne, Qing Yang, Joel L Martin: Nano-linked metallocene catalyst compositions and their polymer products. Chevron Phillips Chemical Company, Merchant & Gould P C, September 6, 2011: US08012900 (30 worldwide citation)

The present invention provides polymerization catalyst compositions employing novel dinuclear metallocene compounds. Methods for making these new dinuclear metallocene compounds and for using such compounds in catalyst compositions for the polymerization and copolymerization of olefins are also prov ...


10
Kumudini C Jayaratne, Michael D Jensen, Qing Yang: Process for preparing a monocyclopentadienyl compound. Chevron Phillips Chemical Company, Merchant & Gould P C, March 22, 2011: US07910763 (21 worldwide citation)

Catalyst compositions comprising a first metallocene compound, a second metallocene compound, an activator-support, and an organoaluminum compound are provided. An improved method for preparing cyclopentadienyl complexes used to produce polyolefins is also provided.