1
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 ...


2
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 ...


3
Helmut G Alt, Syriac J Palackal, M Bruce Welch, David C Rohlfing, Jay Janzen: Method for producing polymer of ethylene. Phillips Petroleum Company, Edward L Bowman, January 20, 1998: US05710224 (60 worldwide citation)

A process for preparing a polymer of ethylene having a flow activation energy higher than that of a substantially linear ethylene polymer of the same molecular weight involving using bridged sandwich-bonded fluorenyl-containing metallocenes and the polymers resulting therefrom.


4
Max P McDaniel, Kathy S Collins, Gil R Hawley, Michael D Jensen, Christopher E Wittner, Elizabeth A Benham, Anthony P Eaton, Joel L Martin, David C Rohlfing, Youlu Yu: Organometal compound catalyst. Phillips Petroleum Company, Womble Carlyle Sandridge & Rice PLLC, December 21, 2004: US06833338 (49 worldwide citation)

This invention provides catalyst compositions that are useful for polymerizing at least one monomer to produce a polymer. This invention also provides catalyst compositions that are useful for polymerizing at least one monomer to produce a polymer, wherein said catalyst composition comprises contact ...


5
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 ...


6
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, June 8, 2010: US07732542 (34 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 ...


7
Youlu Yu, Max P McDaniel, Kathy S Collins, Gil R Hawley, Michael D Jensen, Christopher E Wittner, Elizabeth A Benham, Anthony P Eaton, Joel L Martin, David C Rohlfing: Organometal compound catalyst. Phillips Petroleum Company, Merchant & Gould PC, August 26, 2008: US07417097 (21 worldwide citation)

This invention provides catalyst compositions that are useful for polymerizing at least one monomer to produce a polymer. This invention also provides catalyst compositions that are useful for polymerizing at least one monomer to produce a polymer, wherein said catalyst composition comprises contact ...


8
Qing Yang, Max P McDaniel, Michael D Jensen, Matthew G Thorn, Joel L Martin, Youlu Yu, David C Rohlfing: Polymerization catalysts for producing polymers with low levels of long chain branching. Chevron Phillips Chemical Company, Merchant & Gould P C, August 18, 2009: US07576163 (15 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 ...


9
Max P McDaniel, Elizabeth A Benham, Al R Wolfe, Paul J DesLauriers, Pamela L Meager, William R Coutant, David C Rohlfing, Steven J Secora: Olefin polymers, method of making, and use thereof. Chevron Phillips Chemical Company, Womble Carlyle Sandridge & Rice PLLC, March 15, 2005: US06867278 (15 worldwide citation)

The present invention is directed to homo-polymers and copolymers of mono-1-olefins, a method of making such polymers,and uses of such polymers. Polymers of the present invention are formed by contacting at least one mono-1-olefin having from 2 to about 20 carbon atoms per molecule and at least one ...


10
Paul J DesLauriers, Max P McDaniel, Al R Wolfe, Pamela L Maeger, William R Coutant, David C Rohlfing, Steven J Secora, William B Beaulieu, Elizabeth A Benham, David F Register: Olefin polymers, method of making, and use thereof. Chevron Phillips Chemical Company, Conley Rose P C, Rodney B Carroll, Cheryl L Huseman, November 9, 2010: US07829646 (13 worldwide citation)

The present invention is directed to PE-100 ethylene copolymers and pipe made thereof having a Tabor abrasion between about 0.01 and about 0.001 grams lost/1000 revolutions. These copolymers are formed by contacting ethylene with at least one mono-1-olefin comonomer having from 2 to about 10 carbon ...