Patents by Inventor Renhe Lin

Renhe Lin 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).

  • Moisture-curable urethane-containing fuel resistant prepolymers and compositions thereof
    Patent number: 9334403
    Abstract: Moisture-curable, urethane-containing prepolymers containing urethanes incorporated into the prepolymer backbone and compositions thereof for use in sealant applications are disclosed. The prepolymers can be prepared by reacting an isocyanate-terminated urethane-containing adduct with a compound comprising a group reactive with an isocyanate group and at least one polyalkoxysilyl group. Compositions containing a moisture-curable, urethane-containing prepolymer and a moisture cure catalyst can be used to provide cured compositions exhibiting improved tensile strength. Compositions containing the prepolymers are useful in aerospace sealant applications.
    Type: Grant
    Filed: March 7, 2014
    Date of Patent: May 10, 2016
    Assignee: PRC-DeSoto International, Inc.
    Inventors: Raquel Keledjian, Renhe Lin
  • Phosphine-catalyzed, michael addition-curable sulfur-containing polymer compositions
    Patent number: 9328275
    Abstract: Compositions comprising Michael acceptor-terminated sulfur-containing prepolymers, thiol-terminated sulfur-containing prepolymers, and e phosphine catalysts useful in aerospace sealant applications are disclosed. The compositions exhibit extended pot life, cure rapidly following activation, and provide cured sealants having improved properties useful in aerospace sealant applications.
    Type: Grant
    Filed: March 7, 2014
    Date of Patent: May 3, 2016
    Assignee: PRC DeSoto International, Inc.
    Inventors: Lawrence G. Anderson, Juexiao Cai, Mark P. Bowman, Renhe Lin
  • Michael acceptor-terminated urethane-containing fuel resistant prepolymers and compositions thereof
    Patent number: 9328274
    Abstract: Urethane-containing prepolymers formed from diisocyanates and adapted for Michael addition curing chemistries and compositions thereof for use in sealant applications are disclosed. The prepolymers provide compositions that exhibit room temperature stability and a controlled curing rate following a brief activation.
    Type: Grant
    Filed: March 7, 2014
    Date of Patent: May 3, 2016
    Assignee: PRC-DeSoto International, Inc.
    Inventors: Raquel Keledjian, Marfi Ito, Renhe Lin
  • MULTIFUNCTIONAL SULFUR-CONTAINING POLYMERS, COMPOSITIONS THEREOF AND METHODS OF USE
    Publication number: 20160115350
    Abstract: Disclosed are multifunctional sulfur-containing polymers that are the reaction products of a sulfur-containing diol, a polyol containing at least three hydroxyl groups per polyol molecule, and an aldehyde, a ketone, or a combination thereof. Sealant compositions comprising the multifunctional sulfur-containing polymers are also disclosed.
    Type: Application
    Filed: January 5, 2016
    Publication date: April 28, 2016
    Inventors: STEVEN J. HOBBS, GREGORY J. MCCOLLUM, JUEXIAO CAI, MARFI ITO, LAWRENCE G. ANDERSON, RENHE LIN
  • Adhesion promoting adducts containing metal ligands, compositions thereof, and uses thereof
    Patent number: 9303149
    Abstract: Disclosed are adhesion promoting adducts containing adhesion promoting groups and metal ligands and compositions such as sealant compositions useful in aerospace applications comprising the adhesion promoting adducts. The adhesion promoting adducts are useful as adhesion promoting additives or as a copolymerizable reactant in polymer compositions.
    Type: Grant
    Filed: October 29, 2013
    Date of Patent: April 5, 2016
    Assignee: PRC-DeSoto International, Inc.
    Inventors: Chandra Rao, Jun Deng, Renhe Lin
  • CURE-ON-DEMAND MOISTURE-CURABLE URETHANE-CONTAINING FUEL RESISTANT PREPOLYMERS AND COMPOSITIONS THEREOF
    Publication number: 20160090507
    Abstract: Cure-on-demand, moisture-curable, urethane-containing prepolymers having urethanes incorporated into a sulfur-containing prepolymer backbone and compositions thereof for use in sealant applications are disclosed. The cure-on-demand moisture-curable urethane-containing prepolymers are terminated with polyalkoxysilyl groups. The compositions contain a controlled-release moisture cure catalyst. Compositions containing the prepolymers provide cured sealants exhibiting improved tensile strength.
    Type: Application
    Filed: December 10, 2015
    Publication date: March 31, 2016
    Inventors: Raquel Keledjian, Renhe Lin
  • POLYTHIOETHER SEALANTS WITH ENHANCED THERMAL RESISTANCE
    Publication number: 20160060484
    Abstract: Thiol-terminated polythioether compositions and sealants prepared using the thiol-terminated polythioether compositions that exhibit enhanced retention of elongation following exposure to high temperature are disclosed. The enhanced retention of elongation is realized by incorporating certain phenolic antioxidants into the composition.
    Type: Application
    Filed: August 29, 2014
    Publication date: March 3, 2016
    Inventors: Juexiao Cai, Emilia Serrano, Bruce Virnelson, Renhe Lin
  • Multifunctional sulfur-containing polymers, compositions thereof and methods of use
    Patent number: 9260567
    Abstract: Disclosed are multifunctional sulfur-containing polymers that are the reaction products of a sulfur-containing diol, a polyol containing at least three hydroxyl groups per polyol molecule, and an aldehyde, a ketone, or a combination thereof. Sealant compositions comprising the multifunctional sulfur-containing polymers are also disclosed.
    Type: Grant
    Filed: July 9, 2015
    Date of Patent: February 16, 2016
    Assignee: PRC-DeSoto International, Inc.
    Inventors: Steven J. Hobbs, Gregory J. McCollum, Juexiao Cai, Marfi Ito, Lawrence G. Anderson, Renhe Lin
  • MULTIFUNCTIONAL SULFUR-CONTAINING POLYMERS, COMPOSITIONS THEREOF AND METHODS OF USE
    Publication number: 20150344631
    Abstract: Disclosed are multifunctional sulfur-containing polymers that are the reaction products of a sulfur-containing diol, a polyol containing at least three hydroxyl groups per polyol molecule, and an aldehyde, a ketone, or a combination thereof. Sealant compositions comprising the multifunctional sulfur-containing polymers are also disclosed.
    Type: Application
    Filed: July 9, 2015
    Publication date: December 3, 2015
    Inventors: STEVEN J. HOBBS, GREGORY J. MCCOLLUM, JUEXIAO CAI, MARFI ITO, LAWRENCE G. ANDERSON, RENHE LIN
  • POLYTHIOETHER POLYMERS, METHODS FOR PREPARATION THEREOF, AND COMPOSITIONS COMPRISING THEM
    Publication number: 20150315416
    Abstract: Disclosed are poilythioethers that are the reaction product of reactants that include: a) an isocyanurate-containing trithiol; b) a polythiol different from (a); and c) a diene. Also disclosed are compositions, such as sealant compositions, that include such polythioethers.
    Type: Application
    Filed: June 1, 2015
    Publication date: November 5, 2015
    Inventors: CHARLES M. KANIA, RENHE LIN, CHANDRA B. RAO
  • Perfluoroether sealant compositions
    Patent number: 9169424
    Abstract: Disclosed are perfluoroethers and perfluoroether compositions useful in high temperature aerospace applications. The perfluoroethers can be adapted for use with various curing chemistries.
    Type: Grant
    Filed: January 6, 2015
    Date of Patent: October 27, 2015
    Assignee: PRC-DeSoto International, Inc.
    Inventors: Chandra Rao, Juexiao Cai, Renhe Lin
  • MICHAEL ACCEPTOR-TERMINATED URETHANE-CONTAINING FUEL RESISTANT PREPOLYMERS AND COMPOSITIONS THEREOF
    Publication number: 20150252232
    Abstract: Urethane-containing prepolymers formed from diisocyanates and adapted for Michael addition curing chemistries and compositions thereof for use in sealant applications are disclosed. The prepolymers provide compositions that exhibit room temperature stability and a controlled curing rate following a brief activation.
    Type: Application
    Filed: March 7, 2014
    Publication date: September 10, 2015
    Applicant: PRC-DeSoto International, Inc.
    Inventors: Raquel Keledjian, Marfi Ito, Renhe Lin
  • PHOSPHINE-CATALYZED. MICHAEL ADDITION-CURABLE SULFUR-CONTAINING POLYMER COMPOSITIONS
    Publication number: 20150252233
    Abstract: Compositions comprising Michael acceptor-terminated sulfur-containing prepolymers, thiol-terminated sulfur-containing prepolymers, and e phosphine catalysts useful in aerospace sealant applications are disclosed. The compositions exhibit extended pot life, cure rapidly following activation, and provide cured sealants having improved properties useful in aerospace sealant applications.
    Type: Application
    Filed: March 7, 2014
    Publication date: September 10, 2015
    Applicant: PRC-DeSoto International, Inc.
    Inventors: LAWRENCE G. ANDERSON, JUEXIAO CAl, MARK P. BOWMAN, RENHE LIN
  • MOISTURE-CURABLE URETHANE-CONTAINING FUEL RESISTANT PREPOLYMERS AND COMPOSITIONS THEREOF
    Publication number: 20150252230
    Abstract: Moisture-curable, urethane-containing prepolymers containing urethanes incorporated into the prepolymer backbone and compositions thereof for use in sealant applications are disclosed. The prepolymers provide cured compositions exhibiting improved tensile strength.
    Type: Application
    Filed: March 7, 2014
    Publication date: September 10, 2015
    Applicant: PRC-DeSoto International, Inc.
    Inventors: Raquel Keledjian, Renhe Lin
  • METAL LIGAND-CONTAINING PREPOLYMERS, METHODS OF SYNTHESIS, AND COMPOSITIONS THEREOF
    Publication number: 20150240140
    Abstract: Metal ligand-containing prepolymers, compositions containing metal ligand-containing prepolymers, methods of synthesizing metal ligand-containing prepolymers and the use of metal ligand-containing prepolymers in aerospace sealant applications are disclosed. The metal ligand-containing prepolymers have metal ligands incorporated into the backbone of the prepolymer. Cured sealant compositions comprising the metal ligand-containing prepolymers exhibit enhanced properties suitable for aerospace sealant applications.
    Type: Application
    Filed: May 12, 2015
    Publication date: August 27, 2015
    Inventors: Chandra Rao, Jun Deng, Renhe Lin
  • SULFONE-CONTAINING POLYTHIOETHERS, COMPOSITIONS THEREOF, AND METHODS OF SYNTHESIS
    Publication number: 20150240122
    Abstract: Sulfone-containing polythioethers, compositions containing sulfone-containing polythioethers, methods of synthesizing sulfone-containing polythioethers and the use of sulfone-containing polythioethers in aerospace sealant applications are disclosed. The sulfone-containing polythioethers have sulfone groups incorporated into the backbone of the polythioether. Cured sealant compositions comprising the sulfone-containing polythioethers exhibit enhanced thermal resistance.
    Type: Application
    Filed: May 11, 2015
    Publication date: August 27, 2015
    Inventors: Chandra Rao, Juexiao Cai, Renhe Lin
  • MICHAEL ADDITION CURING CHEMISTRIES FOR SULFUR-CONTAINING POLYMER COMPOSITIONS EMPLOYING BIS(SULFONYL)ALKANOLS
    Publication number: 20150240033
    Abstract: The use of Michael addition curing chemistries in compositions comprising sulfur-containing polymers such as polythioethers and polysulfides useful in aerospace sealant applications are disclosed. Sulfur-containing adducts comprising terminal Michael acceptor groups are also disclosed. In particular, sulfur-containing polymers and sulfur containing Michael acceptor adducts having terminal 1-(ethylenesulfonyl)-n-(vinylsulfonyl)alkanol groups are disclosed.
    Type: Application
    Filed: May 11, 2015
    Publication date: August 27, 2015
    Inventors: Juexiao Cai, Lawrence G. Anderson, Marfi Ito, Renhe Lin
  • Multifunctional sulfur-containing polymers, compositions thereof and methods of use
    Patent number: 9109089
    Abstract: Disclosed are multifunctional sulfur-containing polymers that are the reaction products of a sulfur-containing diol, a polyol containing at least three hydroxyl groups per polyol molecule, and an aldehyde, a ketone, or a combination thereof. Sealant compositions comprising the multifunctional sulfur-containing polymers are also disclosed.
    Type: Grant
    Filed: March 13, 2015
    Date of Patent: August 18, 2015
    Assignee: PRC-DeSoto International, Inc.
    Inventors: Steven J. Hobbs, Gregory J. McCollum, Juexiao Cai, Marfi Ito, Lawrence G. Anderson, Renhe Lin
  • Compositions comprising thiol-terminated polymers and sulfur-containing ethylenically unsaturated silanes and related cured sealants
    Patent number: 9074117
    Abstract: Disclosed are compositions that include: a) a thiol-terminated polymer; and b) a sulfur-containing ethylenically unsaturated silane. Related products, such as sealants, that include polymers derived from such compositions, are also disclosed.
    Type: Grant
    Filed: March 7, 2014
    Date of Patent: July 7, 2015
    Assignee: PRC-DeSoto International, Inc.
    Inventors: Raquel Keledjian, Renhe Lin, Chandra Rao, Bruce Virnelson
  • MULTIFUNCTIONAL SULFUR-CONTAINING POLYMERS, COMPOSITIONS THEREOF AND METHODS OF USE
    Publication number: 20150183806
    Abstract: Disclosed are multifunctional sulfur-containing polymers that are the reaction products of a sulfur-containing diol, a polyol containing at least three hydroxyl groups per polyol molecule, and an aldehyde, a ketone, or a combination thereof. Sealant compositions comprising the multifunctional sulfur-containing polymers are also disclosed.
    Type: Application
    Filed: March 13, 2015
    Publication date: July 2, 2015
    Inventors: Steven J. Hobbs, Gregory J. MCCOLLUM, JUEXIAO CAI, MARFI ITO, LAWRENCE G. ANDERSON, RENHE LIN