Patents by Inventor Juexiao Cai

Juexiao Cai 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: 10011751
    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 4, 2016
    Date of Patent: July 3, 2018
    Assignee: PRC-DeSoto International, Inc.
    Inventors: Lawrence G. Anderson, Juexiao Cai, Mark P. Bowman, Renhe Lin
  • Patent number: 9988487
    Abstract: Compositions comprising sulfur-containing prepolymers such as polythioether prepolymers, polyepoxides, and a blocked 1,8-diazabicyclo[5.4.0]undec-7-ene bicarbonate catalyst useful as aerospace sealants are disclosed. The compositions exhibit extended working time and the curing rate can be tailored for specific applications.
    Type: Grant
    Filed: December 10, 2015
    Date of Patent: June 5, 2018
    Assignee: PRC-DeSoto International, Inc.
    Inventors: Hongying Zhou, Juexiao Cai, Renhe Lin
  • Patent number: 9777139
    Abstract: Reactive antioxidants, antioxidant-containing prepolymers, compositions containing reactive antioxidants and antioxidant-containing prepolymers, methods of synthesizing reactive antioxidants and reactive antioxidant-containing prepolymers and the use of reactive antioxidants and antioxidant-containing prepolymers in aerospace sealant applications are disclosed. Reactive antioxidants and antioxidant-containing prepolymers can be added to a curable composition and react with a curing agent to become incorporated into the cured polymer network. Antioxidant-containing prepolymers have antioxidants incorporated into the backbone of the prepolymer. Cured sealant compositions comprising reactive antioxidants and antioxidant-containing prepolymers exhibit enhanced thermal resistance.
    Type: Grant
    Filed: October 26, 2015
    Date of Patent: October 3, 2017
    Assignee: PRC-DeSoto International, Inc.
    Inventors: Chandra Rao, Juexiao Cai, Renhe Lin
  • Patent number: 9725556
    Abstract: Sulfur-containing polyurea compositions comprising a polyisocyanate and a polyamine are disclosed. The polyisocyanate comprises the reaction product of reactants comprising a diisocyanate having isocyanate groups with different reactivities toward thiol groups, and a thiol-terminated sulfur-containing polymer such as a thiol-terminated polythioether polymer and/or a thiol-terminated polyformal polymer. The polyamine can be an aromatic polyamine and/or an aromatic amine-terminated polythioether adduct. The sulfur-containing polyurea compositions are useful as aerospace sealants.
    Type: Grant
    Filed: November 4, 2014
    Date of Patent: August 8, 2017
    Assignee: PRC-DeSoto International, Inc.
    Inventors: Juexiao Cai, Stephen J. Hobbs, Marfi Ito, Scott Moravek, Renhe Lin
  • Patent number: 9683129
    Abstract: Thiol-terminated polythioether compositions and sealants prepared using the thiol-terminated polythioether compositions that exhibit extended working time and that rapidly cures at room temperature at the end of the working time are disclosed.
    Type: Grant
    Filed: December 4, 2014
    Date of Patent: June 20, 2017
    Assignee: PRC-DeSoto International, Inc.
    Inventors: Juexiao Cai, Renhe Lin
  • Publication number: 20170166689
    Abstract: Compositions comprising sulfur-containing prepolymers such as polythioether prepolymers, polyepoxides, and a blocked 1,8-diazabicyclo[5.4.0]undec-7-ene bicarbonate catalyst useful as aerospace sealants are disclosed. The compositions exhibit extended working time and the curing rate can be tailored for specific applications.
    Type: Application
    Filed: December 10, 2015
    Publication date: June 15, 2017
    Inventors: Hongying Zhou, JUEXIAO CAI, RENHE LIN
  • Patent number: 9650552
    Abstract: Curable compositions containing thiol-terminated polythioethers and encapsulated polyepoxy curing agents are disclosed. The compositions exhibit extended pot life.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: May 16, 2017
    Assignee: PRC-DeSoto International, Inc.
    Inventors: Juexiao Cai, Renhe Lin
  • Publication number: 20170114208
    Abstract: Reactive antioxidants, antioxidant-containing prepolymers, compositions containing reactive antioxidants and antioxidant-containing prepolymers, methods of synthesizing reactive antioxidants and reactive antioxidant-containing prepolymers and the use of reactive antioxidants and antioxidant-containing prepolymers in aerospace sealant applications are disclosed. Reactive antioxidants and antioxidant-containing prepolymers can be added to a curable composition and react with a curing agent to become incorporated into the cured polymer network. Antioxidant-containing prepolymers have antioxidants incorporated into the backbone of the prepolymer. Cured sealant compositions comprising reactive antioxidants and antioxidant-containing prepolymers exhibit enhanced thermal resistance.
    Type: Application
    Filed: October 26, 2015
    Publication date: April 27, 2017
    Inventors: Chandra Rao, Juexiao Cai, Renhe Lin
  • Patent number: 9580635
    Abstract: Disclosed are polyurea compositions comprising the reaction products of a polyformal-isocyanate prepolymer and a curing agent comprising an amine. The compositions are useful as sealants in aerospace applications.
    Type: Grant
    Filed: June 30, 2014
    Date of Patent: February 28, 2017
    Assignee: PRC-DeSoto International, Inc.
    Inventors: Nagarajan Srivatsan, Alfredo Reyes, Sean Manion, Juexiao Cai, Marfi Ito, Renhe Lin
  • Patent number: 9540540
    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: Grant
    Filed: May 11, 2015
    Date of Patent: January 10, 2017
    Assignee: PRC-DeSoto International, Inc.
    Inventors: Chandra Rao, Juexiao Cai, Renhe Lin
  • Patent number: 9499668
    Abstract: Compositions comprising sulfur-containing polymers such as polythioethers, Michael acceptors, and controlled release amine catalysts employing Michael addition curing chemistries useful in aerospace sealant applications are disclosed. The compositions exhibit extended pot life and the rate of curing can be tailored for specific applications.
    Type: Grant
    Filed: December 10, 2014
    Date of Patent: November 22, 2016
    Assignee: PRC-DeSoto International, Inc.
    Inventors: Juexiao Cai, Lawrence G. Anderson, Renhe Lin
  • Patent number: 9422467
    Abstract: Disclosed are flexible polyamines, flexible amine-terminated polyformal adducts, flexible-amine-terminated polythioether adducts, compositions comprising flexible polyamines and isocyanate-terminated prepolymers, and compositions comprising flexible amine-terminated adducts and isocyanate-terminated prepolymers. Uses of the compositions as sealants, and particularly as aerospace sealants, are also disclosed.
    Type: Grant
    Filed: June 18, 2014
    Date of Patent: August 23, 2016
    Assignee: PRC-DeSoto International, Inc.
    Inventors: Stephen J. Hobbs, Marfi Ito, Juexiao Cai, Chandra Rao, Renhe Lin
  • Patent number: 9394405
    Abstract: Compositions useful in aerospace sealant applications comprise sulfur-containing polymers such as polythioethers and polysulfides and are cured using Michael addition reactions. Compositions employing Michael addition curing chemistries include sulfur-containing adducts comprising terminal Michael acceptor groups. In particular, the sulfur-containing adducts include terminal 1-(ethylenesulfonyl)-n-(vinylsulfonyl)alkanol groups.
    Type: Grant
    Filed: May 11, 2015
    Date of Patent: July 19, 2016
    Assignee: PRC-DeSoto International, Inc.
    Inventors: Juexiao Cai, Lawrence G. Anderson, Marfi Ito, Renhe Lin
  • Patent number: 9388280
    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.
    Type: Grant
    Filed: August 19, 2014
    Date of Patent: July 12, 2016
    Assignee: PRC-Desoto International, Inc.
    Inventors: Lawrence G. Anderson, Juexiao Cai, Marfi Ito, Raquel Keledjian, Renhe Lin
  • Patent number: 9382448
    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: Grant
    Filed: August 29, 2014
    Date of Patent: July 5, 2016
    Assignee: PRC-DeSoto International, Inc.
    Inventors: Juexiao Cai, Emilia Serrano, Bruce Virnelson, Renhe Lin
  • Patent number: 9382447
    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: January 5, 2016
    Date of Patent: July 5, 2016
    Assignee: PRC-DeSoto International, Inc.
    Inventors: Steven J. Hobbs, Gregory J. McCollum, Juexiao Cai, Marfi Ito, Lawrence G. Anderson, Renhe Lin
  • Publication number: 20160186025
    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 4, 2016
    Publication date: June 30, 2016
    Inventors: LAWRENCE G. ANDERSON, JUEXIAO CAI, MARK P. BOWMAN, RENHE LIN
  • Patent number: 9365678
    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.
    Type: Grant
    Filed: August 19, 2014
    Date of Patent: June 14, 2016
    Assignee: PRC-DeSoto International, Inc.
    Inventors: Lawrence G. Anderson, Juexiao Cai, Marfi Ito, Raquel Keledjian, Renhe Lin
  • 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
  • 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