Patents by Inventor David John Lohse
David John Lohse 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).
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Patent number: 9309337Abstract: Provided are blends of branched hydrocarbon comb polymers having tailored branching and molecular weight parameters, with substantially linear polymers. Such blends have been found to have improved extensional rheological properties, while maintaining nearly the viscosity of the substantially linear polymers. The blends of the hydrocarbon comb polymers with the substantially linear polymers thus maintain the extrusion processing characteristics of the linear polymer alone, but have improved extensional flow processability, with strain hardening ratios (SHR) greater than 1. The blends are effective in blown film processing. Also disclosed are related methods for improving extensional flow processability using the branched hydrocarbon comb polymers, as well as the branched hydrocarbon comb polymers themselves, including as a property enhancing additive for such substantially linear polymers.Type: GrantFiled: April 2, 2013Date of Patent: April 12, 2016Assignee: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Johannes Matthieu Soulages, David John Lohse, Andy Haishung Tsou, Thomas Sun, Pamela Jean Wright, Nikos Hadjichristidis, Pradeep Pandurang Shirodkar
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Patent number: 8765863Abstract: A halogenated elastomer partially functionalized with triethylamine, in a mixture with fiiier and a cure package, suitable for use as an air barrier in an innertube or tire innerliner, is disclosed. The halogenated elastomer can be a polymer comprising C4 to C7 isoolefm derived units, para-alkylstyrene derived units, para-(haloalkylstyrene) derived units, and para-(triethylammoniumalkylstyrene) derived units. The Mooney viscosity of the elastomer can be controlled by the degree of triethylamine functionalization. Also disclosed is a method for making an article using the tri ethy iamine-functionalized elastomer.Type: GrantFiled: November 14, 2007Date of Patent: July 1, 2014Assignees: ExxonMobil Chemical Patents Inc., Michelin Recherche et Technique S.A.Inventors: Brian Bergman, Anthony Jay Dias, Caiguo Gong, Thomas C. Hodge, David John Lohse, Weiqing Weng
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Patent number: 8623980Abstract: A process for making a substantially saturated dendritic hydrocarbon polymer. The process has the following steps: (a) polymerizing an amount of a first alkadiene monomer under anionic conditions in the presence of a first organic monolithium initiator to produce a linear polyalkadiene having a lithiated chain end; (b) reacting the linear polyalkadiene with an amount of a second organic monolithium initiator in the presence of tetramethylethylene diamine to form a multilithiated polyalkadiene; (c) reacting the multilithiated polyalkadiene with an amount of a second alkadiene monomer to form a branched polyalkadiene; (d) repeating steps (b) and (c) with the branched polyalkadiene one or more times to prepare a dendritic polyalkadiene; and (e) hydrogenating the dendritic polyalkadiene to form the substantially saturated dendritic hydrocarbon polymer.Type: GrantFiled: December 19, 2011Date of Patent: January 7, 2014Assignee: ExxonMobil Research and Engineering CompanyInventors: David John Lohse, Nikos Hadjichristidis, Andy Haishung Tsou, Pamela J. Wright, Suzzy Chen Hsi Ho, Paul Edward Schuenzel
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Patent number: 8604136Abstract: A process for making a substantially saturated dendritic hydrocarbon polymer. The process has the following steps: (a) polymerizing an amount of one or more alkadiene monomers and/or one or more alkenylaromatic polymers under anionic conditions in the presence of a di- or tri-functional organic lithium initiator to produce a polyalkadiene defining a multiplicity of lithiated chain ends; (b) reacting the polyalkadiene with an amount of a tri- or di-functional silane coupling agent to form a dendritic polyalkadiene; and (c) hydrogenating the dendritic polyalkadiene to form a substantially saturated dendritic hydrocarbon polymer.Type: GrantFiled: October 14, 2010Date of Patent: December 10, 2013Assignee: ExxonMobil Research and Engineering CompanyInventors: David John Lohse, Nikos Hadjichristidis, Andy Haishung Tsou, Suzzy C. H. Ho, Paul Edward Schuenzel
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Publication number: 20130261264Abstract: Provided are blends of branched hydrocarbon comb polymers having tailored branching and molecular weight parameters, with substantially linear polymers. Such blends have been found to have improved extensional rheological properties, while maintaining nearly the viscosity of the substantially linear polymers. The blends of the hydrocarbon comb polymers with the substantially linear polymers thus maintain the extrusion processing characteristics of the linear polymer alone, but have improved extensional flow processability, with strain hardening ratios (SHR) greater than 1. The blends are effective in blown film processing. Also disclosed are related methods for improving extensional flow processability using the branched hydrocarbon comb polymers, as well as the branched hydrocarbon comb polymers themselves, including as a property enhancing additive for such substantially linear polymers.Type: ApplicationFiled: April 2, 2013Publication date: October 3, 2013Applicant: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Johannes Mattieu Soulages, David John Lohse, Andy Haishung Tsou, Thomas Sun, Pamela Jean Wright, Nikos Hadjichristidis, Pradeep Pandurang Shirodkar
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Publication number: 20120157633Abstract: A process for making a substantially saturated dendritic hydrocarbon polymer. The process has the following steps: (a) polymerizing an amount of a first alkadiene monomer under anionic conditions in the presence of a first organic monolithium initiator to produce a linear polyalkadiene having a lithiated chain end; (b) reacting the linear polyalkadiene with an amount of a second organic monolithium initiator in the presence of tetramethylethylene diamine to form a multilithiated polyalkadiene; (c) reacting the multilithiated polyalkadiene with an amount of a second alkadiene monomer to form a branched polyalkadiene; (d) repeating steps (b) and (c) with the branched polyalkadiene one or more times to prepare a dendritic polyalkadiene; and (e) hydrogenating the dendritic polyalkadiene to form the substantially saturated dendritic hydrocarbon polymer.Type: ApplicationFiled: December 19, 2011Publication date: June 21, 2012Applicant: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: David John Lohse, Nikos Hadjichristidis, Andy Haishung Tsou, Pamela J. Wright, Suzzy Chen Hsi Ho, Paul Edward Schuenzel
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Patent number: 8183314Abstract: Provided are oil-in-water and water-in-oil emulsion compositions including from 0.01 to 5 wt % of a halogenated elastomer emulsifier, and optionally from to 0.5 wt % of a polyalkylene amine co-emulsifier. The emulsion compositions disclosed herein provide for increased interfacial elasticity and decreased interfacial tension at the oil-water interface to increase resistance to coalescence of dispersed water droplets of a water-in-oil emulsion or oil droplets of an oil-in-water emulsion. The emulsion compositions disclosed herein are suitable for lubricant applications due to their resistance to shear thinning.Type: GrantFiled: June 26, 2009Date of Patent: May 22, 2012Assignee: Exxonmobil Research and Engineering CompanyInventors: Ramesh Varadaraj, Cornelius Hendrick Brons, David John Lohse
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Patent number: 8173748Abstract: Provided is a heat-seal resin. The resin includes 5 wt % to 95 wt % of a first copolymer and 95 wt % to 5 wt % of a second copolymer based on the total weight of the resin. The first copolymer and the second copolymer together are 90 wt % or more of the total weight of the resin. The first copolymer includes a first monomer of an alphaolefin of 2 to 4 carbon atoms and a second monomer selected from a second monomer of an alphaolefin of 2 to 8 carbon atoms. The first monomer and the second monomer of the first copolymer are different. The first copolymer has an MFR of from 5 to 1000 g/10 minutes and a Tfm of 66° C. to 80° C. The second copolymer includes a first monomer of an alphaolefin of 2 to 4 carbon atoms and a second monomer selected from a second monomer of an alphaolefin of 2 to 8 carbon atoms. The first monomer and the second monomer of the second copolymer are different. The second copolymer has an MFR of from 0.5 to 5 g/10 minutes and a Tfm of 45° C. to 66° C.Type: GrantFiled: December 17, 2010Date of Patent: May 8, 2012Assignee: ExxonMobil Research and Engineering CompanyInventors: David John Lohse, Thomas Tungshi Sun, Aspy K. Mehta, Gabor Kiss, Robert Patrick Reynolds, Jr., John W. Chu, Manika Varma-Nair
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Publication number: 20110118420Abstract: A process for making a substantially saturated dendritic hydrocarbon polymer. The process has the following steps: (a) polymerizing an amount of one or more alkadiene monomers and/or one or more alkenylaromatic polymers under anionic conditions in the presence of a di- or tri-functional organic lithium initiator to produce a polyalkadiene defining a multiplicity of lithiated chain ends; (b) reacting the polyalkadiene with an amount of a tri- or di-functional silane coupling agent to form a dendritic polyalkadiene; and (c) hydrogenating the dendritic polyalkadiene to form a substantially saturated dendritic hydrocarbon polymer.Type: ApplicationFiled: October 14, 2010Publication date: May 19, 2011Applicant: ExxonMobil Research and Engineering CompanyInventors: David John Lohse, Nikos Hadjichristidis, Andy Haishung Tsou, Suzzy C.H. Ho, Paul Edward Schuenzel
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Publication number: 20100210779Abstract: A halogenated elastomer partially functionalized with triethylamine, in a mixture with fiiier and a cure package, suitable for use as an air barrier in an innertube or tire innerliner, is disclosed. The halogenated elastomer can be a polymer comprising C4 to C7 isoolefm derived units, para-alkylstyrene derived units, para-(haloalkylstyrene) derived units, and para-(triethylammoniumalkylstyrene) derived units. The Mooney viscosity of the elastomer can be controlled by the degree of triethylamine functionalization. Also disclosed is a method for making an article using the tri ethy iamine-functionalized elastomer.Type: ApplicationFiled: November 14, 2007Publication date: August 19, 2010Applicants: EXXONMOBIL CHEMICAL PATENTS, INC., MICHELIN RECHERCHE ET TECHNIQUE S.A.Inventors: Brian Bergman, Anthony Jay Dias, Caiguo Gong, Thomas C. Hodge, David John Lohse, Weiqing Weng
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Publication number: 20100004382Abstract: Provided are oil-in-water and water-in-oil emulsion compositions including from 0.01 to 5 wt % of a halogenated elastomer emulsifier, and optionally from to 0.5 wt % of a polyalkylene amine co-emulsifier. The emulsion compositions disclosed herein provide for increased interfacial elasticity and decreased interfacial tension at the oil-water interface to increase resistance to coalescence of dispersed water droplets of a water-in-oil emulsion or oil droplets of an oil-in-water emulsion. The emulsion compositions disclosed herein are suitable for lubricant applications due to their resistance to shear thinning.Type: ApplicationFiled: June 26, 2009Publication date: January 7, 2010Inventors: Ramesh Varadaraj, Cornelius Hendrick Brons, David John Lohse
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Publication number: 20090163666Abstract: Provided is a polymer composition having a linear, semi-crystalline thermoplastic matrix polymer and a second thermoplastic polymer. The second polymer is a substantially saturated hydrocarbon polymer including (i) a backbone chain and (ii) one or more substantially hydrocarbon sidechains connected to the backbone chain. The sidechains each have a number-average molecular weight of from 2,500 g/mol to 125,000 g/mol and an MWD by SEC of 1.0 to 3.5. The mass ratio of sidechain molecular mass to backbone molecular mass is from 0.01:1 to 100:1. The matrix polymer is present at 95 wt % or more based on the weight of the composition. The second polymer is present at 0.2 to 5.0 wt % or more based on the weight of the composition. Provided is also a method for enhancing flow-induced crystallization in a linear, semi-crystalline thermoplastic matrix polymer. Provided is also a method for processing a polymer composition.Type: ApplicationFiled: December 16, 2008Publication date: June 25, 2009Inventors: David John Lohse, Cynthia A. Mitchell, Michael Sansone
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Patent number: 7396878Abstract: Polyethylene blend compositions suitable for injection molding, injection molded articles, and processes for injection molding articles are provided. The polyethylene compositions include a first polyethylene having a melt index of 0.1 to 3.0 g/10 min and a density of from 0.905 to 0.938 g/cm3; and a second polyethylene having a melt index of 10 to 500 g/10 min and a density of 0.945 to 0.975 g/cm3. The compositions have a density of from 0.920 to 0.973 g/cm3 and a melt index of 2 to 200 g/10 min, and the density of the second polyethylene is from 0.037 to 0.062 g/cm3 greater than the density of the first polyethylene. The compositions exhibit improved physical properties, such as Environmental Stress Crack Resistance, relative to conventional compositions of similar melt index and density. In certain embodiments, the compositions, and articles produced therefrom, also exhibit an improved balance of toughness properties and processability properties.Type: GrantFiled: July 21, 2005Date of Patent: July 8, 2008Assignee: ExxonMobil Chemical Patents Inc.Inventors: Arnold Lustiger, David John Lohse, Blair A. Graham, Barry C. Trudell
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Patent number: 7396881Abstract: Polyethylene blend compositions suitable for rotomolding, rotomolded articles, and processes for rotomolding articles are provided. The polyethylene compositions include a first polyethylene having a melt index of 0.4 to 3.0 g/10 min and a density of from 0.910 to 0.930 g/cm3; and a second polyethylene having a melt index of 10 to 30 g/10 min and a density of 0.945 to 0.975 g/cm3. The composition has a density of from 0.930 to 0.955 g/cm3 and a melt index of 1.5 to 12 g/10 min, and the first and second polyethylenes differ in density by from 0.030 to 0.048 g/cm3. These compositions exhibit improved physical properties, such as Environmental Stress Crack Resistance and Izod Impact Strength. Articles produced from the compositions may also exhibit improved impact resistance properties, enhanced ductile break properties, and improved deflection resistance, which represents a combination of creep and fatigue resistance.Type: GrantFiled: July 21, 2005Date of Patent: July 8, 2008Assignee: ExxonMobil Chemical Patents Inc.Inventors: Arnold Lustiger, David John Lohse, Blair A. Graham, Ronald Cooke
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Publication number: 20020042475Abstract: The invention is directed towards a PVC resin composition comprising polyvinyl chloride and a plasticizer selected from the group consisting of: a non-linear, paraffin-soluble olefin-CO copolymer; ii) a non-linear olefin-CO copolymer derived from non-pure feeds; iii) an olefin-CO-X terpolymer derived from non-pure feeds; and iv) a non-linear CO-X terpolymer. A method of preparing the resins is also described.Type: ApplicationFiled: June 15, 2001Publication date: April 11, 2002Inventors: Abhimanyu Onkar Patil, Donald Norman Schulz, Manika Varma-Nair, David John Lohse, Christine Ann Costello, Richard Henry Schlosberg, Michael Gerard Matturro
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Patent number: 6114443Abstract: The present invention is based on the discovery that diblock copolymers of ethylene and an atactic alpha-olefin that are prepared in the presence of a catalyst system comprising at least one metallocene compound and a non-coordinating anion are especially useful as compatibilizers with blends of polyethylene and isotactic poly-alpha-olefin homopolymers.Type: GrantFiled: June 23, 1997Date of Patent: September 5, 2000Assignee: Exxon Research and Engineering Co.Inventors: David John Lohse, Henry Wu-Hsiang Yang
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Patent number: 5747596Abstract: Gel-free dispersant additives for lubricating and fuel oil compositions comprise at least one adduct of (A) .alpha.-olefin homopolymer or interpolymer of 700 to 10,000 number average molecular weight, free radically grafted with an average of from about 0.Type: GrantFiled: August 5, 1996Date of Patent: May 5, 1998Assignee: Exxon Chemical Patents Inc.Inventors: Jacob Emert, Robert Dean Lundberg, David John Lohse
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Patent number: 5665183Abstract: A tire inner-liner, comprising a solid rubber and a complex, said complex comprising a reactive rubber and a layered silicate clay uniformly dispersed therein. The complex comprising the clays significantly improve the low air permeability of the tire inner-liner without adversely affecting the rubber composition.Type: GrantFiled: June 7, 1995Date of Patent: September 9, 1997Assignee: Exxon Chemical Patents Inc.Inventors: Edward Nathan Kresge, David John Lohse
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Patent number: 5663129Abstract: Gel-free dispersant additives for lubricating and fuel oil compositions comprise at least one adduct of (A) .alpha.-olefin homopolymer or interpolymer of 700 to 10,000 number average molecular weight, free radically grafted with an average of from about 0.Type: GrantFiled: June 5, 1995Date of Patent: September 2, 1997Assignee: Exxon Chemical Patents Inc.Inventors: Jacob Emert, Robert Dean Lundberg, David John Lohse