Patents by Inventor David F. Lawson

David F. Lawson 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).

  • Patent number: 7816483
    Abstract: A functionalized polymer includes a polymer chain and, bonded thereto, a functional group having the general formula —NQOR1 where R1 is a hydrogen atom or —CH2Z where Z is a hydrogen atom or a substituted or unsubstituted aryl, alkyl, alkenyl, alkenaryl, aralkenyl, alkaryl, or aralkyl group and where Q is a moiety connected to the nitrogen atom of the functional group through a C, N, O, or S atom. The material can be the reaction product of a living polymer and a compound that includes nitroso functionality. The functional group can interact with particulate filler such as, e.g., carbon black.
    Type: Grant
    Filed: August 10, 2006
    Date of Patent: October 19, 2010
    Assignee: Bridgestone Corporation
    Inventors: Terrence E. Hogan, David F. Lawson, Yuan-Yong Yan
  • Publication number: 20100234534
    Abstract: A functionalized polymer terminated by using an isocyanato alkoxysilane terminating agent. A method of preparing a functionalized polymer comprising the step of contacting a living polymer with an isocyanato alkoxysilane terminating agent.
    Type: Application
    Filed: May 24, 2010
    Publication date: September 16, 2010
    Inventors: Christine RADEMACHER, David F. Lawson, Terrence E. Hogan
  • Patent number: 7737218
    Abstract: Provided is a method comprising reacting the anionic living end of a polymer with a compound selected from the group consisting of tin halides and silicon halides to produced a polymer with a homolytically cleavable group containing a Sn—C bond or a Si—C bond. An engineered plastic may then be produced by adding the polymer containing a homolytically cleavable group containing a Sn—C bond or a Si—C bond to a solvent comprising at least one vinyl monomer; (b) optionally adding at least one additional inert solvent; (c) optionally adding additives selected from the group consisting of extender oils, modifiers, and antioxidants; and (d) initiating polymerization of the at least one vinyl monomer by the use of an initiator and/or heat, wherein a free radical is produced from the polymer containing a homolytically cleavable group containing a Sn—C bond or a Si—C bond.
    Type: Grant
    Filed: December 29, 2006
    Date of Patent: June 15, 2010
    Assignee: Bridgestone Corporation
    Inventors: James E. Hall, David F. Lawson
  • Patent number: 7723440
    Abstract: A functionalized polymer defined by the formula ?-R1-?, where ? is a polymer chain, R1 is a bond or a divalent organic group, and ? is a sulfur-containing heterocycle.
    Type: Grant
    Filed: August 29, 2003
    Date of Patent: May 25, 2010
    Assignee: Bridgestone Corporation
    Inventors: Terrence E. Hogan, Christine Rademacher, William Hergenrother, David F. Lawson
  • Publication number: 20090203844
    Abstract: A method of forming a functionalized polymer, the method comprising reacting a living polymer with a compound defined by the formula where R5 includes a monovalent organic group, R6 independently includes a monovalent organic group, each R7 independently includes hydrogen or a monovalent organic group, each R8 independently includes hydrogen or monovalent organic group, R9 includes a monovalent organic group, M is silicon or tin, and x includes an integer from about 2 to about 10, where R5 and R6 may optionally each independently be alkoxy groups, and where R7, R8, and R9 are non-Zerewitinoff organic groups.
    Type: Application
    Filed: March 16, 2009
    Publication date: August 13, 2009
    Inventors: Terrence E. Hogan, Christine Rademacher, David F. Lawson, H. James Harwood
  • Patent number: 7534846
    Abstract: Onium-modified polymers, such as polyethers and alkylimidazolium-modified polymers are provided. The polymers have desirable properties such as moisture absorbing capability, low volatile organic compounds (VOCs) emission, and enhanced electrical conductivity. A method to prepare the polymers is also provided, in which green solvents such as ionic liquids are utilized as both reaction media and reactants.
    Type: Grant
    Filed: May 11, 2005
    Date of Patent: May 19, 2009
    Assignee: Bridgestone Corporation
    Inventors: Xiaorong Wang, Victor J. Foltz, David F. Lawson
  • Patent number: 7534839
    Abstract: Anionically-polymerized living polymers are sequentially functionalized with certain agents X? and Y?. A method of preparing a functionalized polymer comprising the steps of reacting the polymer with a functionalizing agent X?, and then further reacting the polymer with a functionalizing agent Y?.
    Type: Grant
    Filed: June 9, 2004
    Date of Patent: May 19, 2009
    Assignee: Bridgestone Corporation
    Inventors: David F. Lawson, Christine Rademacher, Christopher Robertson
  • Patent number: 7504457
    Abstract: A method of forming a functionalized polymer, the method comprising reacting a living polymer with a compound defined by the formula where R5 includes a monovalent organic group, R6 independently includes a monovalent organic group, each R7 independently includes hydrogen or a monovalent organic group, each R8 independently includes hydrogen or monovalent organic group, R9 includes a monovalent organic group, M is silicon or tin, and x includes an integer from about 2 to about 10, where R5 and R6 may optionally each independently be alkoxy groups, and where R7, R8, and R9 are non-Zerewitinoff organic groups.
    Type: Grant
    Filed: January 13, 2006
    Date of Patent: March 17, 2009
    Assignee: Bridgestone Corporation
    Inventors: Terrence E. Hogan, Christine Rademacher, David F. Lawson, H. James Harwood
  • Patent number: 7405262
    Abstract: A process for preparing a functionalized polymerization initiator, the process comprising combining a functionalized styryl compound and an organolithium compound.
    Type: Grant
    Filed: July 11, 2003
    Date of Patent: July 29, 2008
    Assignee: Bridgestone Corporation
    Inventors: Thomas Antkowiak, Christine Rademacher, Anthony Ramic, David F. Lawson
  • Publication number: 20080161495
    Abstract: Provided is a method comprising reacting the anionic living end of a polymer with a compound selected from the group consisting of tin halides and silicon halides to produced a polymer with a homolytically cleavable group containing a Sn—C bond or a Si—C bond. An engineered plastic may then be produced by adding the polymer containing a homolytically cleavable group containing a Sn—C bond or a Si—C bond to a solvent comprising at least one vinyl monomer; (b) optionally adding at least one additional inert solvent; (c) optionally adding additives selected from the group consisting of extender oils, modifiers, and antioxidants; and (d) initiating polymerization of the at least one vinyl monomer by the use of an initiator and/or heat, wherein a free radical is produced from the polymer containing a homolytically cleavable group containing a Sn—C bond or a Si—C bond.
    Type: Application
    Filed: December 29, 2006
    Publication date: July 3, 2008
    Inventors: James E. Hall, David F. Lawson
  • Patent number: 7335712
    Abstract: This invention relates to siloxy-functionalized polymers having the silicon of the siloxy group directly bonded to the end of a polymer chain through one or more carbon atoms, processes of producing the polymers, and initiators used to prepare the polymers. The polymers may be rubbery polymers, such as butadiene-styrene polymers, which are commonly used in tires.
    Type: Grant
    Filed: April 21, 2005
    Date of Patent: February 26, 2008
    Assignee: Bridgestone Corporation
    Inventors: Yuan-Yong Yan, David F. Lawson, Christine M. Rademacher
  • Patent number: 7279527
    Abstract: Provided is a method of converting an anionic living end to a protected free radical “living” end in a well-controlled manner, which enables copolymerization by plural mechanisms. The method is particularly useful for copolymerization of anionically polymerizable monomers and free radical polymerizable monomers, and therefore useful for production of PB-g-PS, HIPS, ABS, and MBS etc. Also provided is a reversibly coupled polymer, which, when decoupled, generates “living” free radical for further copolymer chain reaction.
    Type: Grant
    Filed: April 22, 2005
    Date of Patent: October 9, 2007
    Assignee: Bridgestone Corporation
    Inventors: James Harwood, James Oziomek, David F. Lawson, James E. Hall
  • Patent number: 7230050
    Abstract: A tire component comprising a vulcanized rubber, and from about 3 to about 85 parts by weight, per 100 parts by weight rubber, of a filler dispersed within said vulcanized rubber, where the vulcanized rubber includes the vulcanized residue of a thermoplastic-elastomeric block copolymer defined by the formula ?-?-?-? where ? is a hydrogen atom or a functional group, ? includes an elastomeric block, ? includes a thermoplastic block, and ? includes a hydrogen atom or a functional group.
    Type: Grant
    Filed: September 30, 2005
    Date of Patent: June 12, 2007
    Assignee: Bridgestone Corporation
    Inventors: Christopher G. Robertson, Terrence E. Hogan, William L. Hergenrother, David F. Lawson
  • Patent number: 6838539
    Abstract: The present invention is directed to a method of forming a polymer composition having quaternary alkane units and aromatic hydrocarbon units. The aromatic hydrocarbon units have substituents of the general formula R1SiR2R3R4, wherein R1 is optional and is a hydrocarbon or ether linking the silicon and the aromatic hydrocarbon, and R2, R3, and R4 are one or more of hydrogen, alkyl, and alkoxy, with the provision that no more than two may be hydrogen or alkyl.
    Type: Grant
    Filed: February 12, 2002
    Date of Patent: January 4, 2005
    Assignee: Bridgestone Corporation
    Inventors: Terrence E. Hogan, David F. Lawson, Takayoki Yako, J. P. Kennedy
  • Publication number: 20030153707
    Abstract: The present invention is directed to a method of forming a polymer composition having quaternary alkane units and aromatic hydrocarbon units. The aromatic hydrocarbon units have substituents of the general formula R1SiR2R3R4, wherein R1 is optional and is a hydrocarbon or ether linking the silicon and the aromatic hydrocarbon, and R2, R3, and R4 are one or more of hydrogen, alkyl, and alkoxy, with the provision that no more than two may be hydrogen or alkyl.
    Type: Application
    Filed: February 12, 2002
    Publication date: August 14, 2003
    Applicant: Bridgestone Corp.
    Inventors: Terrence E. Hogan, David F. Lawson, Takayuki Yako, J. P. Kennedy
  • Publication number: 20030111770
    Abstract: A method for forming a vulcanizable composition of matter, the method comprising providing a polymer cement or latex comprising at least one rubber, adding at least one processing aid to the cement or latex to form a modified rubber cement or latex, isolating the rubber and at least one processing aid to form a premix, and mixing the premix with carbon black.
    Type: Application
    Filed: December 13, 2001
    Publication date: June 19, 2003
    Applicant: Bridgestone Corp.
    Inventors: Georg G. A. Bohm, Anthony J. Ramic, James D. Ulmer, William L. Hergenrother, Christine M. Rademacher, David F. Lawson, Sunil B. Sarkar
  • Patent number: 6476143
    Abstract: A method of preparing a functionalized polymer comprising the steps of initiating the formation and propagation of an anionically-polymerized living polymer, and terminating the propagation of the living polymer by reacting the polymer with a terminating agent selected from the group of agents defined by the formulas (III), (IV), and (V) where C is a carbon atom, S is a sulfur atom, X is a halogen atom, R2 and R4 are independently selected from hydrogen and carbon-based moieties, and where the phenyl groups are selected from unsubstituted and substituted phenyl groups.
    Type: Grant
    Filed: June 8, 2001
    Date of Patent: November 5, 2002
    Assignee: Bridgestone Corporation
    Inventors: David F. Lawson, Mark L. Stayer, Thomas A. Antkowiak
  • Patent number: 6349753
    Abstract: A tire component comprising a plurality of elastomers, where at least one of said elastomers has a functional group defined by the formula where R1 is selected from the group consisting of a divalent alkylene group, an oxy-alkylene group, an amino alkylene group, and a substituted alkylene group, each group having from about 6 to about 20 carbon atoms, and R2 is covalently bonded to the elastomer and is selected from the group consisting of a linear-alkylene group, a branched-alkylene group, and a cyclo-alkylene group, each group having from about 2 to about 20 carbon atoms.
    Type: Grant
    Filed: June 27, 2000
    Date of Patent: February 26, 2002
    Assignee: Bridgestone Corporation
    Inventors: David F. Lawson, Thomas A. Antkowiak, James E. Hall, Mark L. Stayer, Jr., John R. Schreffler
  • Publication number: 20020022701
    Abstract: A method of preparing a functionalized polymer comprising the steps of initiating the formation and propagation of an anionically-polymerized living polymer, and terminating the propagation of the living polymer by reacting the polymer with a terminating agent selected from the group of agents defined by the formulas (III), (IV), and (V) 1
    Type: Application
    Filed: June 8, 2001
    Publication date: February 21, 2002
    Inventors: David F. Lawson, Mark L. Stayer, Thomas A. Antkowiak
  • Patent number: 6274680
    Abstract: A method of preparing a functionalized polymer comprising the steps of initiating the formation and propagation of an anionically-polymerized living polymer, and terminating the propagation of the living polymer by reacting the polymer with a terminating agent selected from the group of agents defined by the formulas (III), (IV), and (V) where C is a carbon atom, S is a sulfur atom, X is a halogen atom, R2 and R4 are independently selected from hydrogen and carbon-based moieties, and where the phenyl groups are selected from unsubstituted and substituted phenyl groups.
    Type: Grant
    Filed: December 31, 1998
    Date of Patent: August 14, 2001
    Assignee: Bridgestone/Firestone Research, Inc.
    Inventors: David F. Lawson, Mark L. Stayer, Thomas A. Antkowiak