Patents by Inventor Timothy D. Shaffer

Timothy D. Shaffer 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).

  • Publication number: 20210371632
    Abstract: In some embodiments, the present disclosure provides a composition comprising 1) about 97.5 wt % to about 99.9 wt % of a first polyethylene having a density of about 0.91 g/cm3 to about 0.94 g/cm3, and a melt strength of about 10 mN or greater; and 2) about 0.1 wt % to about 2.5 wt % of a second polyethylene having an Mw of about 500,000 g/mol or more. In some embodiments, the composition is a film. In some embodiments, the present disclosure provides a method of making a composition comprising blending a first polyethylene of any embodiment described herein and a second polyethylene of any embodiment described herein.
    Type: Application
    Filed: February 5, 2019
    Publication date: December 2, 2021
    Inventors: Johannes M. Soulages, Arnold Lustiger, Thomas T. Sun, Pamela J. Wright, Madhavi Vadlamudi, Alexander I. Norman, Adriana S. Silva, David M. Fiscus, Timothy D. Shaffer
  • Patent number: 11059941
    Abstract: The present disclosure relates to methods for preparing materials from heavy feedstocks. In particular, the disclosure provides a chemical process to convert heavy feedstocks with predominant polyaromatic hydrocarbon molecules or species, including the residues of petrochemical refining or extraction, into thermoset or thermoplastic materials that can be used alone or as a component in a composite material.
    Type: Grant
    Filed: March 25, 2019
    Date of Patent: July 13, 2021
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Huaxing Zhou, Arnold Lustiger, Victor DeFlorio, Srinivasan Rajagopalan, Timothy D. Shaffer, Donald N. Schulz
  • Patent number: 10947375
    Abstract: A system for producing a functionalized olefinic-based polymer, the system comprising a polymerization zone for producing an olefinic-based polymer comprising a mixing section, a deliquifying section, and a quenching section, wherein at least one section of the polymerization zone has a defined cross-sectional area that continually decreases from a first end to a second end of said section; a devolatilization zone comprising a kneader or extruder, wherein said devolatilization zone is downstream of said polymerization zone and in fluid communication with said polymerization zone; and a functionalization zone downstream of said devolatilization zone and in fluid communication with said devolatilization zone.
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: March 16, 2021
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Yu Feng Wang, Richard D. Hembree, Michael F. McDonald, Jr., Joseph A. Maier, Richard C. M. Yeh, Leming Gu, Timothy D. Shaffer, Pamela J. Wright
  • Patent number: 10781295
    Abstract: This invention relates to a brominated elastomer composition comprising a free radical scavenger. The scavenger is present in the amount of at least about 0.05 wt % of the composition. The scavenger is added to the composition so that the Mooney viscosity of the composition does not increase by more than about 15% to about 40%, for up to about 15 days at 80° C. The scavenger can be a sterically hindered nitroxyl ether, a nitroxyl radical, or both.
    Type: Grant
    Filed: December 15, 2014
    Date of Patent: September 22, 2020
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Sunny Jacob, Michael F. McDonald, Jr., Adam H. Scott, Joel E. Schmieg, Timothy D. Shaffer, Jr., John A. Clark
  • Publication number: 20200255643
    Abstract: A system for producing a functionalized olefinic-based polymer, the system comprising a polymerization zone for producing an olefinic-based polymer comprising a mixing section, a deliquifying section, and a quenching section, wherein at least one section of the polymerization zone has a defined cross-sectional area that continually decreases from a first end to a second end of said section; a devolatilization zone comprising a kneader or extruder, wherein said devolatilization zone is downstream of said polymerization zone and in fluid communication with said polymerization zone; and a functionalization zone downstream of said devolatilization zone and in fluid communication with said devolatilization zone.
    Type: Application
    Filed: December 9, 2016
    Publication date: August 13, 2020
    Inventors: Yu Feng Wang, Richard D. Hembree, Michael F. McDonald, JR., Joseph A. Maier, Richard C.M. Yeh, Leming Gu, Timothy D. Shaffer, Pamela J. Wright
  • Publication number: 20190315912
    Abstract: The present disclosure relates to methods for preparing materials from heavy feedstocks. In particular, the disclosure provides a chemical process to convert heavy feedstocks with predominant polyaromatic hydrocarbon molecules or species, including the residues of petrochemical refining or extraction, into thermoset or thermoplastic materials that can be used alone or as a component in a composite material.
    Type: Application
    Filed: March 25, 2019
    Publication date: October 17, 2019
    Inventors: Huaxing Zhou, Arnold Lustiger, Victor DeFlorio, Srinivasan Rajagopalan, Timothy D. Shaffer, Donald N. Schulz
  • Patent number: 10138197
    Abstract: This disclosure describes a new route to acrylate esters via direct catalytic partial oxidation of allyl ether using heterogeneous manganese oxide catalysts. The method involves forming allyl acrylate by contacting allyl ether, where the allyl ether is in solution with a solvent, with one or more oxidants in the presence of a mesoporous manganese oxide (MnOx) catalyst. Oxygen or peroxide can be used as the oxidant. The yield of and selectivity for acrylate ester can be very high, and process efficiency is improved over current processes.
    Type: Grant
    Filed: February 26, 2018
    Date of Patent: November 27, 2018
    Assignee: EXXONMOBIL RESEARCH AND ENGINEERING COMPANY
    Inventors: Partha Nandi, Steven L. Suib, Timothy D. Shaffer
  • Publication number: 20180258023
    Abstract: A process for forming allyl acrylate, comprising contacting allyl ether in solution with a solvent with one or more oxidants in the presence of a mesoporous manganese oxide (MnOx) catalyst.
    Type: Application
    Filed: February 26, 2018
    Publication date: September 13, 2018
    Inventors: Partha NANDI, Steven L. SUIB, Timothy D. SHAFFER
  • Publication number: 20170009058
    Abstract: This invention relates to a brominated elastomer composition comprising a free radical scavenger. The scavenger is present in the amount of at least about 0.05 wt % of the composition. The scavenger is added to the composition so that the Mooney viscosity of the composition does not increase by more than about 15% to about 40%, for up to about 15 days at 80° C. The scavenger can be a sterically hindered nitroxyl ether, a nitroxyl radical, or both.
    Type: Application
    Filed: December 15, 2014
    Publication date: January 12, 2017
    Inventors: Sunny Jacob, Michael F. McDonald, Adam H. Scott, Joel E. Schmieg, Timothy D. Shaffer, John A. Clark
  • Patent number: 9079990
    Abstract: Copolymer are formed by polymerizing C4 to C7 isoolefin monomers and alkyl-styrene monomers. The method comprises first providing feed streams into a reactor. The various feed streams provide monomers, a polar diluent or polar diluent mixture, and a catalyst system into the reactor. In the reactor, the feed streams contact one another so that the monomers form a polymer in a stable slurry, wherein the amount of polymer in the slurry yields a slurry concentration greater than 22 wt %. The ratio of moles of polymer formed per mole initiator is in the range of 0.25 to 4.0 moles polymer per mole of initiator.
    Type: Grant
    Filed: June 1, 2010
    Date of Patent: July 14, 2015
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Timothy D. Shaffer, Deborah J. Davis, James P. Stokes
  • Patent number: 8765824
    Abstract: The present invention is directed to a membrane for ethanol and aromatics separation that is stable in an alcohol containing environment. The membrane is a polyether epoxy resin having an aliphatic substituted epoxide. The invention also teaches a method to control the flux and selectivity of the membrane.
    Type: Grant
    Filed: April 13, 2012
    Date of Patent: July 1, 2014
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Timothy D. Shaffer, Man Kit Ng, David T. Ferrughelli, George Skic, Randall D. Partridge
  • Patent number: 8513367
    Abstract: Method of reducing fouling in an elastomer polymerization process that includes providing a reactor capable of housing an industrial-scale elastomer polymerization reaction, and applying a mechanical force to the reactor so as to create a vibration in at least one wall of the reactor, in which fouling is reduced in the reactor. In one embodiment the reaction is an industrial scale butyl polymerization reaction and the reactor is a butyl polymerization reactor.
    Type: Grant
    Filed: November 11, 2011
    Date of Patent: August 20, 2013
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Timothy D. Shaffer, Pamela J. Wright, Limin Song
  • Publication number: 20120270958
    Abstract: The present invention is directed to a membrane for ethanol and aromatics separation that is stable in an alcohol containing environment. The membrane is a polyether epoxy resin having an aliphatic substituted epoxide. The invention also teaches a method to control the flux and selectivity of the membrane.
    Type: Application
    Filed: April 13, 2012
    Publication date: October 25, 2012
    Applicant: EXXONMOBIL RESEARCH AND ENGINEERING COMPANY
    Inventors: Timothy D. Shaffer, Man Kit Ng, David T. Ferrughelli, George Skic, Randall D. Partridge
  • Publication number: 20120130026
    Abstract: Method of reducing fouling in an elastomer polymerization process that includes providing a reactor capable of housing an industrial-scale elastomer polymerization reaction, and applying a mechanical force to the reactor so as to create a vibration in at least one wall of the reactor, in which fouling is reduced in the reactor. In one embodiment the reaction is an industrial scale butyl polymerization reaction and the reactor is a butyl polymerization reactor.
    Type: Application
    Filed: November 11, 2011
    Publication date: May 24, 2012
    Applicant: EXXONMOBIL RESEARCH AND ENGINEERING COMPANY
    Inventors: Timothy D. SHAFFER, Pamela J. WRIGHT, George P. AKEHURST, Limin SONG
  • Patent number: 8178465
    Abstract: The disclosure provides for a process and polymerization system to produce isoolefin polymers (72) utilizing polymorphogenates (16, 26) in the catalyst system to control polydispersity (MWD). The disclosure also provides a catalyst system (20) comprising a plurality of active catalyst complex species (34) formed by combination of a Lewis acid (24), an initiator (22) and a polymorphogenate (26), as well as polymers made using the catalyst system or process. The polymorphogenate (16, 26) can promote or mimic the formation of different active catalyst complex species (34) having different polymerization rates, i.e. different rates of propagation, chain transfer, or termination, as observed by different polydispersities resulting from the presence of relatively different proportions of the polymorphogenate.
    Type: Grant
    Filed: January 12, 2011
    Date of Patent: May 15, 2012
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Timothy D. Shaffer, Michael F. McDonald, David Y. Chung, Robert N. Webb, Deborah J. Davis, Pamela J. Wright
  • Patent number: 8148450
    Abstract: Provided for herein is a process to produce an essentially homogeneous single liquid phase hydrocarbon-rubber cement from a polymer slurry comprising a hydrocarbon-rubber, a diluent, and unreacted monomer(s), the process comprising: (a) contacting the polymer slurry with a hydrocarbon solvent; and (b) removing the diluent in amounts not sufficiently more than is necessary to produce the essentially homogeneous single liquid phase hydrocarbon-rubber cement wherein the mass fraction of monomer(s) in the hydrocarbon-rubber cement, based on the total amount of hydrocarbon-rubber present in the hydrocarbon-rubber cement, is less than the mass fraction of monomer(s) in the hydrocarbon-rubber slurry, based on the total amount of hydrocarbon-rubber present in the hydrocarbon-rubber slurry, wherein the diluent comprises a hydrofluorocarbon.
    Type: Grant
    Filed: June 23, 2006
    Date of Patent: April 3, 2012
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Michael F. McDonald, Scott T. Milner, Timothy D. Shaffer, Robert N. Webb, Richard D. Hembree
  • Patent number: 8119006
    Abstract: The present invention is directed to a membrane for aromatics separation that is stable in an alcohol containing environment. The polymeric membrane is a epoxy amine based membrane.
    Type: Grant
    Filed: August 21, 2009
    Date of Patent: February 21, 2012
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Abhimanyu O. Patil, Timothy D. Shaffer, David T. Ferrughelli, Beth A. Winsett, Benjamin A. McCool, Randall D. Partridge
  • Publication number: 20110294924
    Abstract: Copolymer are formed by polymerizing C4 to C7 isoolefin monomers and alkyl-styrene monomers. The method comprises first providing feed streams into a reactor. The various feed streams provide monomers, a polar diluent or polar diluent mixture, and a catalyst system into the reactor. In the reactor, the feed streams contact one another so that the monomers form a polymer in a stable slurry, wherein the amount of polymer in the slurry yields a slurry concentration greater than 22 wt %. The ratio of moles of polymer formed per mole initiator is in the range of 0.25 to 4.0 moles polymer per mole of initiator.
    Type: Application
    Filed: June 1, 2010
    Publication date: December 1, 2011
    Inventors: Timothy D. Shaffer, Deborah J. Davis, James P. Stokes
  • Patent number: 7982085
    Abstract: The present invention relates to an in-line method for generating comonomer from monomer, such as ethylene. The comonomer generated is directly transported, without isolation or storage, to a polyethylene polymerization reactor. The in-line method includes the steps of providing an in-line comonomer synthesis reactor and a downstream gas/liquid phase separator prior to the polymerization reactor; feeding ethylene monomer and a catalyst in a solvent and/or diluent to the comonomer synthesis reactor; reacting the ethylene monomer and the catalyst in solvent and/or diluent under reaction conditions to produce an effluent stream including ethylene monomer and comonomer; passing the effluent stream from the comonomer synthesis reactor to the downstream gas/liquid phase separator to separate a gas stream from a bottom stream, wherein the gas stream is a mixture of ethylene monomer and comonomer; and passing the gas stream to the polymerization reactor to provide the necessary comonomer input.
    Type: Grant
    Filed: September 8, 2006
    Date of Patent: July 19, 2011
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: John Scott Buchanan, Timothy D. Shaffer, James R. Lattner, John F. Walzer
  • Patent number: 7981991
    Abstract: Methods for producing elastomers or elastomeric compositions are provided. One or more C4 to C7 isoolefins and one or more comonomers can be polymerized in the presence of a diluent comprising one or more hydrofluorocarbons to provide a slurry comprising polymer product, unreacted monomer and the diluent. The slurry can be extruded to separate at least a portion of the diluent from the polymer product. The separated diluent can be recycled for polymerizing the one or more C4 to C7 isoolefins.
    Type: Grant
    Filed: April 20, 2007
    Date of Patent: July 19, 2011
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Michael F. McDonald, Scott T. Milner, Timothy D. Shaffer, Robert N. Webb