Patents by Inventor Kenichi YAKIGAYA

Kenichi YAKIGAYA 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).

  • Process for producing sulfonic acid group-containing monomer
    Patent number: 11820733
    Abstract: The present disclosure is directed to provide a process capable of producing a sulfonic acid group-containing monomer in a good yield, which can be used as a raw material of fluorine-based polymer electrolytes, such as membranes for fuel cells, catalyst binder polymers for fuel cells, and membranes for chlor-alkali electrolysis. A process for producing a sulfonic acid group-containing monomer represented by the general formula (3) includes the step of mixing and stirring a cyclic compound represented by the general formula (1) and a silanol compound represented by the general formula (2).
    Type: Grant
    Filed: February 13, 2019
    Date of Patent: November 21, 2023
    Assignee: ASAHI KASEI KABUSHIKI KAISHA
    Inventors: Nobuyuki Uematsu, Yasuhiro Nagato, Kaishi Hori, Kenichi Yakigaya
  • Vinylsulfonic anhydride, method for producing same, and method for producing vinylsulfonyl fluoride
    Patent number: 11649205
    Abstract: The present disclosure is directed to provide a vinylsulfonic anhydride which is useful as a synthetic intermediate for synthesis of a fluorinated monomer. It is also directed to efficiently produce the vinylsulfonic anhydride. It is further directed to efficiently produce a fluorinated monomer using the vinylsulfonic anhydride. A vinylsulfonic anhydride of the present disclosure is expressed by the general formula (1). Further, a process for producing a vinylsulfonic anhydride of the present disclosure includes making a vinylsulfonic acid compound represented by the general formula (2) come in contact and be mixed with an anhydridization agent.
    Type: Grant
    Filed: June 20, 2019
    Date of Patent: May 16, 2023
    Assignee: ASAHI KASEI KABUSHIKI KAISHA
    Inventors: Nobuyuki Uematsu, Hideki Date, Yasuhiro Nagato, Akitake Nakamura, Kenichi Yakigaya
  • VINYLSULFONIC ANHYDRIDE, METHOD FOR PRODUCING SAME, AND METHOD FOR PRODUCING VINYLSULFONYL FLUORIDE
    Publication number: 20210269395
    Abstract: The present disclosure is directed to provide a vinylsulfonic anhydride which is useful as a synthetic intermediate for synthesis of a fluorinated monomer. It is also directed to efficiently produce the vinylsulfonic anhydride. It is further directed to efficiently produce a fluorinated monomer using the vinylsulfonic anhydride. A vinylsulfonic anhydride of the present disclosure is expressed by the general formula (1). Further, a process for producing a vinylsulfonic anhydride of the present disclosure includes making a vinylsulfonic acid compound represented by the general formula (2) come in contact and be mixed with an anhydridization agent.
    Type: Application
    Filed: June 20, 2019
    Publication date: September 2, 2021
    Applicant: Asahi Kasei Kabushiki Kaisha
    Inventors: Nobuyuki UEMATSU, Hideki DATE, Yasuhiro NAGATO, Akitake NAKAMURA, Kenichi YAKIGAYA
  • PROCESS FOR PRODUCING SULFONIC ACID GROUP-CONTAINING MONOMER
    Publication number: 20200399210
    Abstract: The present disclosure is directed to provide a process capable of producing a sulfonic acid group-containing monomer in a good yield, which can be used as a raw material of fluorine-based polymer electrolytes, such as membranes for fuel cells, catalyst binder polymers for fuel cells, and membranes for chlor-alkali electrolysis. A process for producing a sulfonic acid group-containing monomer represented by the general formula (3) includes the step of mixing and stirring a cyclic compound represented by the general formula (1) and a silanol compound represented by the general formula (2).
    Type: Application
    Filed: February 13, 2019
    Publication date: December 24, 2020
    Applicant: ASAHI KASEI KABUSHIKI KAISHA
    Inventors: Nobuyuki UEMATSU, Yasuhiro NAGATO, Kaishi HORI, Kenichi YAKIGAYA