Patents by Inventor Joel L. Martin

Joel L. Martin has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • System and method for reducing fouling in a reactor
    Publication number: 20100048837
    Abstract: The techniques disclosed provide a treatment method for passivating the interior surface of a polymerization reactor to minimize the formation of a polymer coating on the surface. The passivation is performed using a passivating agent that reacts with adsorbed water to form labile passivation products. Both the passivating agent and passivation products may be easily removed from the reactor prior to polymerization. Other embodiments provide a reactor system with a tank configured to automatically add a passivating agent to the reactor and processes for making polymers using a treated reactor.
    Type: Application
    Filed: August 22, 2008
    Publication date: February 25, 2010
    Inventors: Joel L. Martin, Jim B. Askew
  • CATALYST COMPOSITIONS AND POLYOLEFINS FOR EXTRUSION COATING APPLICATIONS
    Publication number: 20100048843
    Abstract: 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 comprising the contact product of a first metallocene compound, a second metallocene compound, at least one chemically-treated solid oxide, and at least one organoaluminum compound. The new resins were characterized by useful properties in impact, tear, adhesion, sealing, extruder motor loads and pressures at comparable melt index values, and neck-in and draw-down.
    Type: Application
    Filed: October 29, 2009
    Publication date: February 25, 2010
    Applicant: CHEVRON PHILLIPS CHEMICALCOMPANY LP
    Inventors: Michael D. Jensen, Max P. McDaniel, Joel L. Martin, Elizabeth A. Benham, Randy Muninger, Gary Jerdee, Ashish M. Sukhadia, Qing Yang, Matthew G. Thorn
  • DUAL METALLOCENE CATALYSTS FOR POLYMERIZATION OF BIMODAL POLYMERS
    Publication number: 20100041842
    Abstract: This invention relates to catalyst compositions, methods, and polymers encompassing at least one first Group 4 metallocene compound comprising bridging ?5-cyclopentadienyl-type ligands, in combination with at least one second Group 4 metallocene with non-bridging ?5-cyclopentadienyl-type ligands, typically in combination with at least one cocatalyst, and at least one activator. The compositions and methods disclosed herein provide ethylene polymers with a bimodal molecular weight distribution.
    Type: Application
    Filed: October 1, 2009
    Publication date: February 18, 2010
    Applicant: CHEVRON PHILLIPS CHEMICAL COMPANY LP
    Inventors: Qing Yang, Kumudini C. Jayaratne, Michael D. Jensen, Max P. McDaniel, Joel L. Martin, Matthew G. Thorn, Jerry T. Lanier, Tony R. Crain
  • ACIDIC ACTIVATOR-SUPPORTS AND CATALYSTS FOR OLEFIN POLYMERIZATION
    Publication number: 20100029872
    Abstract: This invention relates to the field of olefin polymerization catalyst compositions, and methods for the polymerization and copolymerization of olefins, typically using a supported catalyst composition. In one aspect, this invention encompasses precontacting a metallocene with an olefin or alkyne monomer and an organoaluminum compound, prior to contacting this mixture with the acidic activator-support.
    Type: Application
    Filed: October 15, 2009
    Publication date: February 4, 2010
    Applicant: CHEVRON PHILLIPS CHEMICAL COMPANY LP
    Inventors: Michael D. Jensen, Gil R. Hawley, Max P. McDaniel, Tony Crain, Elizabeth A. Benham, Joel L. Martin, Qing Yang
  • Polymerization catalysts for producing high molecular weight polymers with low levels of long chain branching
    Patent number: 7652160
    Abstract: This invention relates to catalyst compositions, methods, and polymers encompassing at least one Group 4 metallocene compound comprising bridging ?5-cyclopentadienyl-type ligands, typically in combination with at least one cocatalyst, and at least one activator. The compositions and methods disclosed herein provide ethylene polymers with low levels of long chain branching.
    Type: Grant
    Filed: February 10, 2009
    Date of Patent: January 26, 2010
    Assignee: Cheveron Phillips Chemical Company, L.P.
    Inventors: Qing Yang, Michael D. Jensen, Joel L. Martin, Matthew G. Thorn, Max P. McDaniel, Youlu Yu, David C. Rohlfing
  • Polyethylene film having improved mechanical and barrier properties and method of making same
    Patent number: 7632907
    Abstract: A polyethylene film comprising a polymer composition having the characteristics of a total energy dart drop, measured in accordance with ASTM D4272, of greater than a bout 0.45 ft.lbf, a dart drop impact strength, measured in accordance with ASTM D1709 Method A, of greater than about 135 g, and a moisture vapor transmission rate, measured in accordance with ASTM F1249 at 100° F. and 90% relative. humidity, of less than about 0.85 g-mil/100 square inch/24 hr, wherein said ASTM tests are performed on a test specimen having a 0.8 mil thickness.
    Type: Grant
    Filed: June 28, 2006
    Date of Patent: December 15, 2009
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Ashish M. Sukhadia, Joel L. Martin, Qing Yang, Kumudini C. Jayaratne, J. Todd Lanier
  • Acidic activator supports and catalysts for olefin polymerization
    Patent number: 7629284
    Abstract: This invention relates to the field of olefin polymerization catalyst compositions, and methods for the polymerization and copolymerization of olefins, typically using a supported catalyst composition. In one aspect, this invention encompasses precontacting a metallocene with an olefin or alkyne monomer and an organoaluminum compound, prior to contacting this mixture with the acidic activator-support.
    Type: Grant
    Filed: August 27, 2007
    Date of Patent: December 8, 2009
    Assignee: Chevron Phillips Chemical Company, LP
    Inventors: Michael D. Jensen, Gil R. Hawley, Max P. McDaniel, Tony Crain, Elizabeth A. Benham, Joel L. Martin, Qing Yang
  • Multimodal polyethylene compositions and pipe made from same
    Patent number: 7625982
    Abstract: A multimodal polyethylene composition having at least two polyethylene components, wherein each component has a molecular weight distribution of equal to or less than about 5, one component has a higher molecular weight than the other component, and the higher molecular weight component has an “a” parameter value of equal to or greater than about 0.35 when fitted to the Carreau-Yasuda equation with n=0.
    Type: Grant
    Filed: November 2, 2005
    Date of Patent: December 1, 2009
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Joel L. Martin, Kumudini Jayarante, Matthew G. Thorn, J. Todd Lanier, Max P. McDaniel, Qing Yang, Michael D. Jensen, Paul J. DesLauriers, Rajendra K. Krishnaswamy
  • Organometal catalyst compositions
    Patent number: 7622414
    Abstract: This invention provides compositions that are useful for polymerizing at least one monomer to produce a polymer. This invention also provides compositions that are useful for polymerizing at least one monomer to produce a polymer, wherein said composition comprises a post-contacted organometal compound, a post-contacted organoaluminum compound, and a post-contacted treated solid oxide compound. The post-contacted organometal compound includes metallocenes. The post-contacted treated solid oxide compound contains fluorine, boron, and a solid oxide compound.
    Type: Grant
    Filed: May 19, 2003
    Date of Patent: November 24, 2009
    Assignee: Chevron Phillips Chemical Company, LP
    Inventors: Max P. McDaniel, Kathy S. Collins, Elizabeth A. Benham, Anthony P. Eaton, Michael D. Jensen, Joel L. Martin, Gil R. Hawley
  • Dual metallocene catalysts for polymerization of bimodal polymers
    Patent number: 7619047
    Abstract: This invention relates to catalyst compositions, methods, and polymers encompassing at least one first Group 4 metallocene compound comprising bridging ?5-cyclopentadienyl-type ligands, in combination with at least one second Group 4 metallocene with non-bridging ?5-cyclopentadienyl-type ligands, typically in combination with at least one cocatalyst, and at least one activator. The compositions and methods disclosed herein provide ethylene polymers with a bimodal molecular weight distribution.
    Type: Grant
    Filed: February 22, 2006
    Date of Patent: November 17, 2009
    Assignee: Chevron Phillips Chemical Company, LP
    Inventors: Qing Yang, Kumudini C. Jayaratne, Michael D. Jensen, Max P. McDaniel, Joel L. Martin, Matthew G. Thorn, Jerry T. Lanier, Tony R. Crain
  • POLYMERIZATION CATALYSTS FOR PRODUCING HIGH MOLECULAR WEIGHT POLYMERS WITH LOW LEVELS OF LONG CHAIN BRANCHING
    Publication number: 20090281342
    Abstract: This invention relates to catalyst compositions, methods, and polymers encompassing at least one Group 4 metallocene compound comprising bridging ?5-cyclopentadienyl-type ligands, typically in combination with at least one cocatalyst, and at least one activator. The compositions and methods disclosed herein provide ethylene polymers with low levels of long chain branching.
    Type: Application
    Filed: February 10, 2009
    Publication date: November 12, 2009
    Inventors: Qing Yang, Michael D. Jensen, Joel L. Martin, Matthew G. Thorn, Max P. McDaniel, Youlu Yu, David C. Rohlfing
  • Polymerization catalysts for producing polymers with low levels of long chain branching
    Patent number: 7576163
    Abstract: This invention relates to catalyst compositions, methods, and polymers encompassing at least one Group 4 metallocene compound comprising bridging ?5-cyclopentadienyl-type ligands, typically in combination with at least one cocatalyst, and at least one activator. The compositions and methods disclosed herein provide ethylene polymers with low levels of long chain branching.
    Type: Grant
    Filed: March 31, 2006
    Date of Patent: August 18, 2009
    Assignee: Chevron Phillips Chemical Company, LP
    Inventors: Qing Yang, Max P. McDaniel, Michael D. Jensen, Matthew G. Thorn, Joel L. Martin, Youlu Yu, David C. Rohlfing
  • Fulvene purification
    Patent number: 7572948
    Abstract: The present invention provides a method of removing undesired isomers, including substituted cyclopentadiene regioisomers, from the desired fulvene in a crude fulvene composition by selectively reacting the undesired isomers with pyrrolidine and 4-(N,N-dimethylamino)benzaldehyde. This reaction converts the undesired substituted cyclopentadienes into fulvene-type compounds that is readily separated from the desired fulvene.
    Type: Grant
    Filed: May 16, 2007
    Date of Patent: August 11, 2009
    Assignee: Chevron Phillips Chemical Company, LP
    Inventors: Joel L. Martin, Qing Yang, Rex E. Murray
  • Ethylene homopolymers or copolymers having good machine direction (MD) elmendorf tear strength
    Patent number: 7572875
    Abstract: 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 polyolefins. The compositions and methods disclosed herein provide ethylene polymers and copolymers with lower MI, increased melt strength, and good MD tear properties.
    Type: Grant
    Filed: June 5, 2006
    Date of Patent: August 11, 2009
    Assignee: Chevron Phillips Chemical Company, LP
    Inventors: 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
  • NANO-LINKED METALLOCENE CATALYST COMPOSITIONS AND THEIR POLYMER PRODUCTS
    Publication number: 20090171041
    Abstract: 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 provided.
    Type: Application
    Filed: December 28, 2007
    Publication date: July 2, 2009
    Applicant: Chevron Phillips Chemical Company
    Inventors: Rex E. Murray, Kumudini C. Jayaratne, Qing Yang, Joel L. Martin
  • NANO-LINKED METALLOCENE CATALYST COMPOSITIONS AND THEIR POLYMER PRODUCTS
    Publication number: 20090170691
    Abstract: 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 provided.
    Type: Application
    Filed: December 28, 2007
    Publication date: July 2, 2009
    Applicant: Chevron Phillips Chemical Company
    Inventors: Rex E. Murray, Kumudini C. Jayaratne, Qing Yang, Joel L. Martin
  • NANO-LINKED METALLOCENE CATALYST COMPOSITIONS AND THEIR POLYMER PRODUCTS
    Publication number: 20090170690
    Abstract: 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 provided.
    Type: Application
    Filed: December 28, 2007
    Publication date: July 2, 2009
    Applicant: Chevron Phillips Chemical Company
    Inventors: Rex E. Murray, Kumudini C. Jayaratne, Qing Yang, Joel L. Martin
  • Organometal compound catalyst
    Patent number: 7547754
    Abstract: 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 contacting an organometal compound, an organoaluminum compound, and a treated solid oxide compound.
    Type: Grant
    Filed: April 6, 2007
    Date of Patent: June 16, 2009
    Assignee: Chevron Phillips Chemical Company, LP
    Inventors: 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
  • Polymerization catalysts for producing high molecular weight polymers with low levels of long chain branching
    Patent number: 7517939
    Abstract: This invention relates to catalyst compositions, methods, and polymers encompassing at least one Group 4 metallocene compound comprising bridging ?5-cyclopentadienyl-type ligands, typically in combination with at least one cocatalyst, and at least one activator. The compositions and methods disclosed herein provide ethylene polymers with low levels of long chain branching.
    Type: Grant
    Filed: February 2, 2006
    Date of Patent: April 14, 2009
    Assignee: Chevron Phillips Chemical Company, LP
    Inventors: Qing Yang, Michael D. Jensen, Joel L. Martin, Matthew G. Thorn, Max P. McDaniel, Youlu Yu, David C. Rohlfing
  • Polymerization catalysts for producing polymers with low melt elasticity
    Publication number: 20090088543
    Abstract: The present techniques relate to catalyst compositions, methods, and polymers encompassing a Group 4 metallocene compound comprising bridging ?5-cyclopentadienyl-type ligands, typically in combination with a cocatalyst, and a activator. The compositions and methods presented herein include ethylene polymers with low melt elasticity.
    Type: Application
    Filed: September 28, 2007
    Publication date: April 2, 2009
    Inventors: Qing Yang, Max P. McDaniel, Joel L. Martin, Youlu Yu, David C. Rohlfing