Patents by Inventor Atsushi Watakabe

Atsushi Watakabe 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: 10604461
    Abstract: The purpose of the present invention is to obtain a fluorine-containing compound which is easily stabilized without irradiation of ultraviolet light, by efficiently converting a C—I bond in an iodine-containing compound having a group represented by —CFRf—I (wherein Rf is a fluorine atom or a perfluoroalkyl group) to a C—H bond. A method for producing a fluorine-containing compound having an iodine atom content reduced than the following iodine-containing compound, which comprises subjecting an iodine-containing compound having a group represented by —CFRf—I (wherein Rf is a fluorine atom or a perfluoroalkyl group) to deiodinating treatment in the presence of an organic peroxide and a hydrogen-containing compound having a group represented by —CHR1—CHR2—CHR3— (wherein R1, R2 and R3 are each independently a hydrogen atom or an alkyl group).
    Type: Grant
    Filed: April 3, 2018
    Date of Patent: March 31, 2020
    Assignee: AGC Inc.
    Inventor: Atsushi Watakabe
  • Publication number: 20180222828
    Abstract: The purpose of the present invention is to obtain a fluorine-containing compound which is easily stabilized without irradiation of ultraviolet light, by efficiently converting a C—I bond in an iodine-containing compound having a group represented by —CFRf—I (wherein Rf is a fluorine atom or a perfluoroalkyl group) to a C—H bond. A method for producing a fluorine-containing compound having an iodine atom content reduced than the following iodine-containing compound, which comprises subjecting an iodine-containing compound having a group represented by —CFRf—I (wherein Rf is a fluorine atom or a perfluoroalkyl group) to deiodinating treatment in the presence of an organic peroxide and a hydrogen-containing compound having a group represented by —CHR1—CHR2—CHR3— (wherein R1, R2 and R3 are each independently a hydrogen atom or an alkyl group).
    Type: Application
    Filed: April 3, 2018
    Publication date: August 9, 2018
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventor: Atsushi Watakabe
  • Patent number: 9692073
    Abstract: To provide a membrane/electrode assembly excellent in the power generation characteristics even under low or no humidity conditions or under high humidity conditions, and an electrolyte material suitable for a catalyst layer of the 5 membrane/electrode assembly, an electrolyte material is used which comprises a polymer (H) having a unit (A) which has an ion exchange group and in which all hydrogen atoms (excluding H+ of the ion exchange group) bonded to carbon atoms are substituted by fluorine atoms, a unit (B) which has a 5-membered ring and in which all hydrogen atoms bonded to carbon 10 atoms are substituted by fluorine atoms, and a unit (C) which has neither an ion exchange group nor a ring structure, has an ether bond, and has an ether equivalent of at most 350 as established by the following formula (I) and in which all hydrogen atoms bonded to carbon atoms are substituted by fluorine atoms: Ether equivalent=the molecular weight of the monomer forming the unit (C)/the 15 number of ether bonds in the mo
    Type: Grant
    Filed: October 2, 2014
    Date of Patent: June 27, 2017
    Assignee: Asahi Glass Company, Limited
    Inventors: Satoru Hommura, Susumu Saito, Tetsuji Shimohira, Atsushi Watakabe
  • Publication number: 20170098846
    Abstract: To provide: an electrolyte material having high oxygen permeability as compared with conventional ones; a membrane electrode assembly for a polymer electrolyte fuel cell excellent in power generation characteristics as compared with conventional ones; a liquid composition suitable for forming a catalyst layer for the membrane electrode assembly; and a fluorinated branched polymer useful as e.g. a raw material of the electrolyte material. The electrolyte material comprises a fluoropolymer (H)1 having a structural unit (u1) that has an ionic group and a structural unit (u2) that has an alicyclic structure, wherein the fluoropolymer (H)1 is composed of a branched molecular chain, and has a segment (A)3 comprising a molecular chain having the structural unit (u1) and a segment (B)2 composed of a molecular chain having the structural unit (u2), and the ion exchange capacity of the segment (B)2 is smaller than the ion exchange capacity of the segment (A)3.
    Type: Application
    Filed: December 19, 2016
    Publication date: April 6, 2017
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Atsushi Watakabe, Takeshi Hirai, Satoru Hommura
  • Patent number: 9508463
    Abstract: It is to provide an electrolyte material with which an increase in the water content can be suppressed even when the ion exchange capacity of a polymer having repeating units based on a monomer having a dioxolane ring is high; and a membrane/electrode assembly excellent in the power generation characteristics under low or no humidity conditions and under high humidity conditions. It is to use an electrolyte material, which comprises a polymer (H) having ion exchange groups converted from precursor groups in a polymer (F), and having an ion exchange capacity of at least 1.35 meq/g dry resin, the polymer (F) having repeating units (A) based on a perfluoromonomer having a precursor group of an ion exchange group and a dioxolane ring and repeating units (B) based on a perfluoromonomer having no precursor group and having a dioxolane ring, and having a TQ of at least 200° C.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: November 29, 2016
    Assignee: Asahi Glass Company, Limited
    Inventors: Satoru Hommura, Susumu Saito, Tetsuji Shimohira, Atsushi Watakabe
  • Publication number: 20150030962
    Abstract: To provide a membrane/electrode assembly excellent in the power generation characteristics even under low or no humidity conditions or under high humidity conditions, and an electrolyte material suitable for a catalyst layer of the membrane/electrode assembly.
    Type: Application
    Filed: October 2, 2014
    Publication date: January 29, 2015
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Satoru HOMMURA, Susumu SAITO, Tetsuji SHIMOHIRA, Atsushi WATAKABE
  • Patent number: 8933264
    Abstract: To provide a method for producing an organic compound having a sulfo group by efficiently hydrolyzing an organic compound having a fluorosulfonyl group with a small number of steps with a small quantity of waste liquid. A method for producing an organic compound having a sulfo group, which comprises bringing an organic compound having a fluorosulfonyl group into contact with subcritical water at from 200 to 320° C. to convert the fluorosulfonyl group into a sulfo group.
    Type: Grant
    Filed: February 26, 2014
    Date of Patent: January 13, 2015
    Assignee: Asahi Glass Company, Limited
    Inventors: Atsushi Watakabe, Yoshitomi Morizawa, Hisao Hori, Takehiko Sakamoto, Tomoyuki Fujita, Kana Ishikawa
  • Publication number: 20140179948
    Abstract: To provide a method for producing an organic compound having a sulfo group by efficiently hydrolyzing an organic compound having a fluorosulfonyl group with a small number of steps with a small quantity of waste liquid. A method for producing an organic compound having a sulfo group, which comprises bringing an organic compound having a fluorosulfonyl group into contact with subcritical water at from 200 to 320° C. to convert the fluorosulfonyl group into a sulfo group.
    Type: Application
    Filed: February 26, 2014
    Publication date: June 26, 2014
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Atsushi WATAKABE, Yoshitomi MORIZAWA, Hisao HORI, Takehiko SAKAMOTO, Tomoyuki FUJITA, Kana ISHIKAWA
  • Patent number: 8658746
    Abstract: To provide an electrolyte polymer for polymer electrolyte fuel cells, made of a perfluorinated polymer having sulfonic groups, characterized in that in a test of immersing 0.1 g of the polymer in 50 g of a fenton reagent solution containing 3% of an aqueous hydrogen peroxide solution and 200 ppm of bivalent iron ions at 40° C. for 16 hours, the amount of eluted fluorine ions detected in the solution is not more than 0.002% of the total amount of fluorine in the polymer immersed. The electrolyte polymer of the present invention has very few unstable terminal groups and has an excellent durability, and therefore, is suitable as a polymer constituting an electrolyte membrane for polymer electrolyte fuel cells and a polymer contained in a catalyst layer.
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: February 25, 2014
    Assignee: Asahi Glass Company, Limited
    Inventors: Nobuyuki Kasahara, Atsushi Watakabe, Tetsuji Shimohira, Hisao Kawazoe, Ichiro Terada
  • Publication number: 20130345443
    Abstract: A fluorosulfonyl group-containing monomer having a high polymerization reactivity and plural fluorosulfonyl groups, a fluorosulfonyl group-containing polymer and a sulfonic acid group-containing polymer, obtained by using the monomer.
    Type: Application
    Filed: August 30, 2013
    Publication date: December 26, 2013
    Applicant: Asahi Glass Company, Limited
    Inventors: Atsushi WATAKABE, Hiromasa Yamamoto, Masao Iwaya, Susumu Saito
  • Patent number: 8597855
    Abstract: An electrolyte material, which comprises a polymer (H) having ion exchange groups converted from precursor groups in a polymer (F) having repeating units (A) having a precursor group represented by the formula (g1) and repeating units (B) based on a perfluoromonomer having a 5-membered ring, and having a density of at most 2.03 g/cm3, the polymer (H) having an ion exchange capacity of from 1.3 to 2.3 meq/g dry resin: wherein Q1 and Q2 are a perfluoroalkylene group having an etheric oxygen atom, or the like, and Y is F or the like; the electrolyte material being suitable for a catalyst layer of the membrane/electrode assembly; the membrane/electrode assembly being excellent in power generation characteristics under low or no humidity conditions and under high humidity conditions.
    Type: Grant
    Filed: July 26, 2010
    Date of Patent: December 3, 2013
    Assignee: Asahi Glass Company, Limited
    Inventors: Satoru Hommura, Susumu Saito, Tetsuji Shimohira, Atsushi Watakabe
  • Patent number: 8557474
    Abstract: A fluorosulfonyl group-containing monomer having a high polymerization reactivity and plural fluorosulfonyl groups, a fluorosulfonyl group-containing polymer and a sulfonic acid group-containing polymer, obtained by using the monomer.
    Type: Grant
    Filed: November 29, 2010
    Date of Patent: October 15, 2013
    Assignee: Asahi Glass Company, Limited
    Inventors: Atsushi Watakabe, Hiromasa Yamamoto, Masao Iwaya, Susumu Saito
  • Patent number: 8470943
    Abstract: A solid polymer electrolyte material made of a copolymer comprising a repeating unit based on a fluoromonomer A which gives a polymer having an alicyclic structure in its main chain by radical polymerization, and a repeating unit based on a fluoromonomer B of the following formula (1): CF2?CF(Rf)jSO2X??(1) wherein j is 0 or 1, X is a fluorine atom, a chlorine atom or OM {wherein M is a hydrogen atom, an alkali metal atom or a group of NR1R2R3R4 (wherein each of R1, R2, R3 and R4 which may be the same or different, is a hydrogen atom or a monovalent organic group)}, and Rf is a C1-20 polyfluoroalkylene group having a straight chain or branched structure which may contain ether oxygen atoms.
    Type: Grant
    Filed: August 1, 2012
    Date of Patent: June 25, 2013
    Assignee: Asahi Glass Company, Limited
    Inventors: Atsushi Watakabe, Takeshi Eriguchi, Toshihiro Tanuma, Yasuhiro Kunisa
  • Publication number: 20120301813
    Abstract: A solid polymer electrolyte material made of a s copolymer comprising a repeating unit based on a fluoromonomer A which gives a polymer having an alicyclic structure in its main chain by radical polymerization, and a repeating unit based on a fluoromonomer B of the following formula (1): CF2?CF(Rf)jSO2X??(1) wherein j is 0 or 1, X is a fluorine atom, a chlorine atom or OM {wherein M is a hydrogen atom, an alkali metal atom or a group of NR1R2R3R4 (wherein each of R1, R2, R3 and R4 which may be the same or different, is a hydrogen atom or a monovalent organic group)}, and Rf is a C1-20 polyfluoroalkylene group having a straight chain or branched structure which may contain ether oxygen atoms.
    Type: Application
    Filed: August 1, 2012
    Publication date: November 29, 2012
    Applicant: Asahi Glass Company, Limited
    Inventors: Atsushi Watakabe, Takeshi Eriguchi, Toshihiro Tanuma, Yasuhiro Kunisa
  • Patent number: 8263710
    Abstract: A solid polymer electrolyte material made of a copolymer comprising a repeating unit based on a fluoromonomer A which gives a polymer having an alicyclic structure in its main chain by radical polymerization, and a repeating unit based on a fluoromonomer B of the following formula (1): CF2?CF(Rf)jSO2X??(1) wherein j is 0 or 1, X is a fluorine atom, a chlorine atom or OM {wherein M is a hydrogen atom, an alkali metal atom or a group of NR1R2R3R4 (wherein each of R1, R2, R3 and R4 which may be the same or different, is a hydrogen atom or a monovalent organic group)}, and Rf is a C1-20 polyfluoroalkylene group having a straight chain or branched structure which may contain ether oxygen atoms.
    Type: Grant
    Filed: August 22, 2011
    Date of Patent: September 11, 2012
    Assignee: Asahi Glass Company, Limited
    Inventors: Atsushi Watakabe, Takeshi Eriguchi, Toshihiro Tanuma, Yasuhiro Kunisa
  • Patent number: 8227139
    Abstract: An electrolyte material for a polymer electrolyte fuel cell, which is made of a copolymer comprising repeating units based on CF2?CFCF2OCF2CF2SO3H and repeating units based on tetrafluoroethylene and which has an ion exchange capacity of from 0.9 to 1.5 (meq/g dry resin). This electrolyte material has ion conductivity and durability equal to conventional electrolyte material, is easy to synthesize, has a softening point higher than electrolyte material heretofore widely used for application to fuel cells and is suitable for operation of a polymer electrolyte fuel cell at a temperature higher than the conventional material.
    Type: Grant
    Filed: August 5, 2009
    Date of Patent: July 24, 2012
    Assignee: Asahi Glass Company, Limited
    Inventor: Atsushi Watakabe
  • Patent number: 8198394
    Abstract: A membrane-electrode assembly for polymer electrolyte fuel cells which is excellent in water repellency and gas diffusivity and which exhibits a high output power density, can be obtained by using, as an electrolyte material for polymer electrolyte fuel cells, a fluoropolymer obtained by contacting a fluoropolymer which is excellent in gas diffusivity and which has alicyclic structures in its main chain and further has sulfonic acid groups, with fluorine gas for fluorination to increase water repellency and stabilize the molecule ends.
    Type: Grant
    Filed: April 28, 2009
    Date of Patent: June 12, 2012
    Assignee: Asahi Glass Company, Limited
    Inventors: Jun-ichi Tayanagi, Atsushi Watakabe, Susumu Saito, Katsuya Ueno
  • Patent number: 8182951
    Abstract: To provide a fuel cell system provided with a polymer electrolyte fuel cell which is excellent in the power generation characteristics under high temperature and low or no humidity conditions. A fuel cell system 20 comprising a polymer electrolyte fuel cell 22 having a membrane/electrode assembly 10 having a catalyst layer containing a polymer (H) which has repeating units based on a perfluoromonomer having an alicyclic structure and has ion exchange groups, a temperature controlling means for controlling temperature of the polymer electrolyte fuel cell 22, a temperature sensor 38 for detecting temperature of the polymer electrolyte fuel cell 22, and a controlling device 40 for controlling the temperature controlling means based on temperature information from the temperature sensor 38 so that the maximum temperature of the polymer electrolyte fuel cell 22 becomes within the range of from 90 to 140° C.
    Type: Grant
    Filed: July 1, 2010
    Date of Patent: May 22, 2012
    Assignee: Asahi Glass Company, Limited
    Inventors: Satoru Hommura, Susumu Saito, Tetsuji Shimohira, Atsushi Watakabe, Junichi Tayanagi
  • Patent number: 8097383
    Abstract: To provide a polymer electrolyte material for polymer electrolyte fuel cells, which is an electrolyte material having a high ion exchange capacity and a low resistance, and which has a higher softening temperature than a conventional electrolyte material.
    Type: Grant
    Filed: January 28, 2008
    Date of Patent: January 17, 2012
    Assignee: Asahi Glass Company, Limited
    Inventors: Isamu Kaneko, Tetsuji Shimohira, Atsushi Watakabe, Seigo Kotera, Satoru Hommura, Koichi Murata, Jyunichi Tayanagi, Susumu Saito
  • Publication number: 20110305971
    Abstract: A solid polymer electrolyte material made of a copolymer comprising a repeating unit based on a fluoromonomer A which gives a polymer having an alicyclic structure in its main chain by radical polymerization, and a repeating unit based on a fluoromonomer B of the following formula (1): CF2?CF(Rf)jSO2X ??(1) wherein j is 0 or 1, X is a fluorine atom, a chlorine atom or OM {wherein M is a hydrogen atom, an alkali metal atom or a group of NR1R2R3R4 (wherein each of R1, R2, R3 and R4 which may be the same or different, is a hydrogen atom or a monovalent organic group)}, and Rf is a C1-20 polyfluoroalkylene group having a straight chain or branched structure which may contain ether oxygen atoms.
    Type: Application
    Filed: August 22, 2011
    Publication date: December 15, 2011
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Atsushi WATAKABE, Takeshi Eriguchi, Toshihiro Tanuma, Yasuhiro Kunisa