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
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 ...


3
Qing Yang, Max P McDaniel, Joel L Martin, Tony R Crain, Randy S Muninger, Jerry T Lanier, Jeff S Fodor, Paul J Deslauriers, Chung C Tso, David C Rohlfing: Process for producing broader molecular weight distribution polymers with a reverse comonomer distribution and low levels of long chain branches. Chevron Phillips Chemical Company, Merchant & Gould P C, February 14, 2012: US08114946 (72 worldwide citation)

The present invention provides a polymerization process which is conducted by contacting an olefin monomer and at least one olefin comonomer in the presence of hydrogen and a metallocene-based catalyst composition. Polymers produced from the polymerization process are also provided, and these polyme ...


4
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 ...


5

6
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.


7
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 ...


8
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 ...


9
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. Cheveron Phillips Chemical Company, Merchant & Gould, January 26, 2010: US07652160 (37 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 ...


10
Paivi Huovinen, Ali Harlin, Pirjo Jaaskelainen, Amir Karbasi, Nina Manner: High melt strength polypropylene. Borealis Technology Oy, Birch Stewart Kolasch & Birch, April 29, 2008: US07365136 (35 worldwide citation)

The present invention concerns a high melt strength propylene polymer or copolymer suitable for manufacturing foams and thermoformed product exhibiting a melt strength of at least 3 g and comprising a high molar mass portion and a low or medium molar mass portion. The polymers are produced by subjec ...