Patents by Inventor Peijun Jiang

Peijun Jiang 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).

  • Polyethylene Copolymers with Vinyl Terminated Macromonomers as Comonomers
    Publication number: 20140213734
    Abstract: This invention relates to polyethylene copolymers comprising ethylene and vinyl terminated macromonomers. The polyethylene copolymers are achieved by copolymerization of ethylene and vinyl terminated macromonomers in a polymerization reactor, particularly in high yields and with a wide range of VTM molecular weights, that can be made at commercial rates.
    Type: Application
    Filed: January 17, 2014
    Publication date: July 31, 2014
    Inventor: Peijun Jiang
  • Branched Propylene Oligomers
    Publication number: 20140213745
    Abstract: This invention relates method to prepare and compositions pertaining to an amorphous polymer comprising: at least 95 mol % propylene and 0 to 5 mol % vinyl monomer content, wherein the polymer has a g?vis of less than 0.95, an Mn of about 200 to about 10,000, an ?Hf of less than 10 J/g and has greater than 50% allylic chain end functionality.
    Type: Application
    Filed: January 17, 2014
    Publication date: July 31, 2014
    Inventors: Peijun Jiang, Charles J. Ruff
  • Polymerization Process for Production of Polymer
    Publication number: 20140163183
    Abstract: A process comprising contacting a catalyst system with one or more olefins in a bubble column reactor. Also, a polyolefin copolymer composition comprising ethylene, propylene and optionally a C4 to C20 alpha olefin; said composition having a bimodal distribution with respect to composition distribution, molecular weight distribution or a combination thereof; an Mw of 10,000 g/mol or more; and/or at least two melting peaks in a DSC heating cycle with a difference in melting temperatures of at least 5° C.
    Type: Application
    Filed: November 26, 2013
    Publication date: June 12, 2014
    Inventors: Peijun Jiang, Keith E. Jolibois, Ronald R. Thackston
  • Polyalpha-olefin compositions and processes to produce the same
    Patent number: 8748361
    Abstract: This invention relates to a polyalpha-olefin (and hydrogenated analogs thereof) comprising more than 50 mole % of one or more C5 to C24 alpha-olefin monomers where the polyalpha-olefin has: a) 40 mole % or more of mm triads, b) a Bromine number of Y or greater, where Y is equal to 89.92*(V)?°5863, where V is the Kinematic Viscosity of the polyalpha-olefin measured at 100° C. in cSt, and c) 1,2 disubstituted olefins present at 7 mole % or more, preferably having Z mole % or more of units represented by the formula: where j, k and m are each, independently, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, or 22, n is an integer from 1 to 350, and where Z=8.420*Log(V)?4.048, where V is the kinematic viscosity of the polyalpha-olefin measured at 1000 C in cSt This invention also relates to process to produce such polyalpha-olefins.
    Type: Grant
    Filed: June 2, 2006
    Date of Patent: June 10, 2014
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Margaret May-Som Wu, Lisa Saunders Baugh, Jo Ann Marie Canich, Chia Shian Chee, Mark Paul Hagemeister, Andrew Jackson, Peijun Jiang, Gordon H. Lee, Frederick Yip-Kwai Lo, Steven P. Rucker, Shakeel Tirmizi, John F. Walzer, Jr., Norman Yang
  • Propylene Copolymers for Adhesive Applications
    Publication number: 20140080974
    Abstract: Disclosed herein is an in-reactor produced multi-component copolymer comprises a semi-crystalline component having a crystallinity of 20% or more, and an amorphous component having a crystallinity of 5% or less. The copolymer comprises at least 80 wt % of units derived from propylene and from about 1 to about 20 wt % of units derived from at least one C6 to C12 alpha-olefin. The copolymer has a viscosity at 190° C. of at least 530 mPa sec and a heat of fusion between about 10 and about 70 J/g. An adhesive containing the copolymer exhibits a good balance of adhesive properties and mechanical strength.
    Type: Application
    Filed: November 21, 2013
    Publication date: March 20, 2014
    Inventors: Peijun Jiang, Patrick Brant, David Aaron Henning, David Raymond Johnsrud, Charles Lewis Sims
  • Ethylene Copolymers, Methods for Their Production, and Use
    Publication number: 20140080982
    Abstract: Provided is an ethylene copolymer having 40 wt. % to 70 wt. % of units derived from ethylene and at least 30 wt. % of units derived from at least one ?-olefin having 3 to 20 carbon atoms and has the following properties: (a) a weight-average molecular weight (Mw), as measured by GPC, in the range of about 50,000 to about 200,000 g/mol; (b) a melting point (Tm) in ° C., as measured by DSC, that satisfies the relation: Tm>3.4×E?180 where E is the weight % of units derived from ethylene in the copolymer; (c) a ratio of Mw/Mn of about 1.8 to about 2.5; (d) a content of Group 4 metals of no more than 5 ppm; and (e) a ratio of wt ppm Group 4 metals/wt ppm Group 5 metals of at least 3. Also provided are methods for making an ethylene copolymer and compositions comprising an ethylene copolymer.
    Type: Application
    Filed: November 22, 2013
    Publication date: March 20, 2014
    Inventors: Rainer Kolb, Donna J. Crowther, Peijun Jiang
  • Multiple Catalyst System for Olefin Polymerization and Polymers Produced Therefrom
    Publication number: 20140066567
    Abstract: This invention relates to an adhesive comprising an olefin polymer composition comprising a first amorphous polymer having a crystallinity of 5% or less, prepared with a first catalyst; and a second crystalline polymer, differing in chemical and physical properties from the first polymer, having a crystallinity of 20% or more, prepared with a second catalyst; and where the olefin polymer composition has a Dot T-Peel of 1 Newton or more on Kraft paper; an Mw of at least 7,000 to 80,000; a branching index (g?) of from 0.4 to 0.90 measured at the Mz of the polymer composition; and a crystallinity of between 5 and 40%.
    Type: Application
    Filed: September 10, 2013
    Publication date: March 6, 2014
    Inventors: Peijun Jiang, Armenag Hagop Dekmezian, Jo Ann Marie Canich, Charles Lewis Sims, Ramin Abhari, Cesar Alberto Garcia-Franco, David Raymond Johnsrud
  • Functionalized olefin polymers
    Patent number: 8653199
    Abstract: This invention relates to a composition comprising a functionalized C3 to C40 olefin polymer comprising at least 50 mol % of one or more C3 to C40 olefins, and where the olefin polymer, prior to functionalization, has: a Dot T-Peel of 1 Newton or more on Kraft paper; an Mw of 10,000 to 100,000; and a branching index (g?) of 0.98 or less measured at the Mz of the polymer when the polymer has an Mw of 10,000 to 60,000, or a branching index of 0.95 or less measured at the Mz of the polymer when the polymer has an Mw of 10,000 to 100,000; and where the C3 to C40 olefin polymer comprises at least 0.001 wt % of a functional group. This invention further relates to blends of such functionalized polymers with other polymers including non-functionalized C3 to C40 olefin polymers as described above.
    Type: Grant
    Filed: June 15, 2012
    Date of Patent: February 18, 2014
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Ramin Abhari, Charles Lewis Sims, Mun Fu Tse, Patrick Brant, Peijun Jiang, David Raymond Johnsrud
  • Propylene copolymers for adhesive applications
    Patent number: 8653169
    Abstract: Disclosed herein are adhesives comprising a copolymer comprising at least 80 wt % of units derived from propylene and from about 1 to about 20 wt % of units derived from at least one C6 to C10 alpha-olefin. The copolymer has a molecular weight of less than 100,000 and a heat of fusion between about 10 and about 70 J/g. An adhesive containing the copolymer preferably exhibits at least 50% fiber tear at ?18° C. and at least 50% fiber tear at +25° C. using Inland paper board as a substrate; a viscosity of less than 50,000 mPa sec at 190° C., a set time of less than 4 seconds and a toughness of at least 3.4 megajoule/m3.
    Type: Grant
    Filed: September 29, 2006
    Date of Patent: February 18, 2014
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Peijun Jiang, Patrick Brant, Chad E. Bernard, David R. Johnsrud, Charles L. Sims
  • Catalyst System, Process For Olefin Polymerization, And Polymer Compositions Produced Therefrom
    Publication number: 20140038486
    Abstract: Provided are catalyst systems, processes for polymerizing one or more olefins, polymers resulting therefrom, and articles prepared from such polymers. The processes comprise contacting under polymerization conditions one or more olefin monomers, preferably propylene, with a catalyst system comprising a transition metal compound and an activator of the formula (1) or (2) as described herein. The polymer compositions described herein exhibit advantageously narrow composition distributions and high melting points in comparison to conventional polymers having the same comonomer content. The polymers described herein exhibit improved properties, e.g., pellet stability, impact properties, heat seal properties, and structural integrity in film and fabricated parts applications.
    Type: Application
    Filed: October 9, 2013
    Publication date: February 6, 2014
    Inventors: Donna J. Crowther, Peijun Jiang, Rainer Kolb
  • Branched vinyl terminated polymers and methods for production thereof
    Patent number: 8623974
    Abstract: This invention relates to a process for polymerization, comprising (i) contacting, at a temperature greater than 35° C., one or more monomers comprising ethylene and/or propylene, with a catalyst system comprising a metallocene catalyst compound and an activator, (ii) converting at least 50 mol % of the monomer to polyolefin; and (iii) obtaining a branched polyolefin having greater than 50% allyl chain ends, relative to total unsaturated chain ends. The invention also relates to the branched polyolefins and functionalized branched polyolefins.
    Type: Grant
    Filed: March 5, 2012
    Date of Patent: January 7, 2014
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Peijun Jiang, Patrick Brant
  • Ethylene copolymers, methods for their production, and use
    Patent number: 8618033
    Abstract: Provided is an ethylene copolymer having 40 wt. % to 70 wt. % of units derived from ethylene and at least 30 wt. % of units derived from at least one ?-olefin having 3 to 20 carbon atoms and has the following properties: (a) a weight-average molecular weight (Mw), as measured by GPC, in the range of about 50,000 to about 200,000 g/mol; (b) a melting point (Tm) in ° C., as measured by DSC, that satisfies the relation: Tm>3.4×E?180 where E is the weight % of units derived from ethylene in the copolymer; (c) a ratio of Mw/Mn of about 1.8 to about 2.5; (d) a content of Group 4 metals of no more than 5 ppm; and (e) a ratio of wt ppm Group 4 metals/wt ppm Group 5 metals of at least 3. Also provided are methods for making an ethylene copolymer and compositions comprising an ethylene copolymer.
    Type: Grant
    Filed: January 12, 2011
    Date of Patent: December 31, 2013
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Rainer Kolb, Donna J. Crowther, Peijun Jiang
  • Propylene copolymers for adhesive applications
    Patent number: 8618219
    Abstract: Disclosed herein is an in-reactor produced multi-component copolymer comprises a semi-crystalline component having a crystallinity of 20% or more, and an amorphous component having a crystallinity of 5% or less. The copolymer comprises at least 80 wt % of units derived from propylene and from about 1 to about 20 wt % of units derived from at least one C6 to C12 alpha-olefin. The copolymer has a viscosity at 190° C. of at least 530 mPa sec and a heat of fusion between about 10 and about 70 J/g. An adhesive containing the copolymer exhibits a good balance of adhesive properties and mechanical strength.
    Type: Grant
    Filed: September 29, 2006
    Date of Patent: December 31, 2013
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Peijun Jiang, Patrick Brant, David Aaron Henning, David R. Johnsrud, Charles L. Sims
  • Catalyst system, process for olefin polymerization, and polymer compositions produced therefrom
    Patent number: 8580902
    Abstract: Provided are catalyst systems, processes for polymerizing one or more olefins, polymers resulting therefrom, and articles prepared from such polymers. The processes comprise contacting under polymerization conditions one or more olefin monomers, preferably propylene, with a catalyst system comprising a transition metal compound and an activator of the formula (1) or (2) as described herein. The polymer compositions described herein exhibit advantageously narrow composition distributions and high melting points in comparison to conventional polymers having the same comonomer content. The polymers described herein exhibit improved properties, e.g., pellet stability, impact properties, heat seal properties, and structural integrity in film and fabricated parts applications.
    Type: Grant
    Filed: August 14, 2009
    Date of Patent: November 12, 2013
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Donna J. Crowther, Peijun Jiang, Rainer Kolb
  • Blocky Ethylene Propylene Copolymers and Methods for Making Them
    Publication number: 20130281641
    Abstract: Copolymers comprising ethylene and propylene and methods for producing such polymers are provided. The polymers are blocky copolymers having semicrystalline ethylene sequences and amorphous or low crystallinity propylene sequences. The polymers are preferably prepared using metallocene-based catalyst systems but without the use of a chain shuttling agent. The polymers may have higher melting temperatures than previously known random copolymers or blocky copolymers prepared with chain shuttling agents having similar comonomer contents. The polymers include both ethylene-rich and propylene-rich copolymers.
    Type: Application
    Filed: March 12, 2013
    Publication date: October 24, 2013
    Applicant: ExxonMobil Chemical Patents Inc.
    Inventors: Rainer Kolb, Donna J. Crowther, Peijun Jiang
  • Multiple catalyst system for olefin polymerization and polymers produced therefrom
    Patent number: 8563647
    Abstract: The present invention describes polymer comprising one or more C3 to C40 olefins and having a Mw of 100,000 or less and a Dot T-Peel of 1 Newton or more. The polymer may have a branching index (g?) of 0.95 or less measured at the Mz of the polymer, and a heat of fusion of 1 to 70 J/g. Also described are polymers of homopolypropylene or a copolymer of propylene and up to 5 mole % ethylene having: an isotactic run length of 1 to 30 as determined by Carbon 13 NMR and a percent of r dyad of greater than 20%, preferably from 20 to 70% as determined by Carbon 13 NMR. Also described are methods of making these and other polymers.
    Type: Grant
    Filed: October 25, 2011
    Date of Patent: October 22, 2013
    Assignee: Exxonmobil Chemical Patents Inc.
    Inventors: Peijun Jiang, Armenag Hagop Dekmezian, Jo Ann Marie Canich, Charles Lewis Sims, Ramin Abhari, Cesar Alberto Garcia-Franco, David Raymond Johnsrud
  • Branched Vinyl Terminated Polymers and Methods for Production Thereof
    Publication number: 20130261277
    Abstract: This invention relates to a process for polymerization, comprising (i) contacting, at a temperature greater than 35° C., one or more monomers comprising ethylene and/or propylene, with a catalyst system comprising a metallocene catalyst compound and an activator, (ii) converting at least 50 mol % of the monomer to polyolefin; and (iii) obtaining a branched polyolefin having greater than 50% allyl chain ends, relative to total unsaturated chain ends. The invention also relates to the branched polyolefins and functionalized branched polyolefins.
    Type: Application
    Filed: May 23, 2013
    Publication date: October 3, 2013
    Inventors: Peijun Jiang, Patrick Brant
  • Thermoplastic polyolefin blends and films therefrom
    Patent number: 8497325
    Abstract: This invention relates to a film comprising a blend composition comprising: 1) a linear ethylene containing polymer, such as a LLDPE, a HDPE or the like; and at least 1 weight percent of an in-reactor polymer blend comprising: (a) a first ethylene containing polymer having a density of greater than 0.90 g/cm3 and a Mw of more than 20,000 g/mol; and (b) a second ethylene containing polymer having a density of less than 0.90 g/cm3, wherein the polymer blend has a Tm of at least 90° C. (DSC second melt), a density of less than 0.92 g/cm3, and the densities of the first and second polymers differ by at least 1%.
    Type: Grant
    Filed: September 27, 2012
    Date of Patent: July 30, 2013
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Mun F. Tse, Peijun Jiang, Jianya Cheng
  • Solution blending process for preparing thermoplastic vulcanizates
    Patent number: 8481646
    Abstract: This invention relates to the preparation of thermoplastic vulcanizates (TPVs) with unique morphological features, more specifically, this invention relates to a method for preparing TPV compositions wherein the mixing of plastomers and elastomers are carried out in solvent with curatives to induce cross-linking.
    Type: Grant
    Filed: February 23, 2011
    Date of Patent: July 9, 2013
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Weiqing Weng, Sunny Jacob, Peijun Jiang, Armenag H. Dekmezian, Aspy K. Mehta, James R. Ayers, David J. Lohse, Peter W. Manders, Palanisamy Arjunan
  • Thermoplastic elastomer polyolefin in-reactor blends and molded articles therefrom
    Patent number: 8481647
    Abstract: This invention relates to an in-reactor polymer blend comprising: (a) a first ethylene-containing polymer having a density of greater than 0.90 g/cm3 and a Mw of more than 20,000 g/mol and (b) a second ethylene-containing polymer having a density of less than 0.90 g/cm3 wherein the polymer blend has a Tm of at least 90° C. (DSC second melt), a density of less than 0.92 g/cm3, and the densities of the first and second polymers differ by at least 1%.
    Type: Grant
    Filed: December 19, 2011
    Date of Patent: July 9, 2013
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Peijun Jiang, Armenag H. Dekmezian, Kevin R. Squire, Cesar A. Garcia-Franco