Patents by Inventor Takeshi Hirai

Takeshi Hirai 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).

  • Publication number: 20220041765
    Abstract: A method for producing a fluorosulfonyl group-containing compound to obtain a compound represented by the following formula 5 from a compound represented by the following formula 1 as a starting material and a method for producing a fluorosulfonyl group-containing monomer in which the fluorosulfonyl group-containing compound is used: wherein R1 and R2 are a C1-3 alkylene group, and RF1 and RF2 are a C1-3 perfluoroalkylene group.
    Type: Application
    Filed: October 20, 2021
    Publication date: February 10, 2022
    Applicant: AGC Inc.
    Inventors: Takeshi HIRAI, Daisuke Jomuta, Chikaya Tamitsuji
  • Patent number: 11242420
    Abstract: A method for producing a fluorosulfonyl group-containing compound to obtain a compound represented by the following formula 5 from a compound represented by the following formula 1 as a starting material and a method for producing a fluorosulfonyl group-containing monomer in which the fluorosulfonyl group-containing compound is used: wherein R1 and R2 are a C1-3 alkylene group, and RF1 and RF2 are a C1-3 perfluoroalkylene group.
    Type: Grant
    Filed: February 26, 2020
    Date of Patent: February 8, 2022
    Assignee: AGC Inc.
    Inventors: Takeshi Hirai, Daisuke Jomuta, Chikaya Tamitsuji
  • Publication number: 20210391590
    Abstract: To provide a polymer electrolyte membrane capable of producing a polymer electrolyte fuel cell excellent in power generation characteristics and excellent in hydrogen gas utilization efficiency, as well as a membrane electrode assembly and a polymer electrolyte fuel cell obtainable by using it. The polymer electrolyte membrane of the present invention comprises a polymer electrolyte, of which the hydrogen gas permeation coefficient under the conditions of a temperature of 80° C. and a relative humidity of 10% is at most 2.4×10?9 cm3·cm/(s·cm2·cmHg) and has a membrane thickness of from 7 to 20 ?m.
    Type: Application
    Filed: August 20, 2021
    Publication date: December 16, 2021
    Applicant: AGC Inc.
    Inventors: Takumi Okuyama, Takeshi Hirai
  • Publication number: 20210381119
    Abstract: To provide a polymer electrolyte membrane which can be applied to a polymer electrolyte water electrolyzer, and is capable of producing a polymer electrolyte water electrolyzer having a low electrolytic voltage and excellent in hydrogen gas recovery efficiency, as well as a membrane electrode assembly and a polymer electrolyte water electrolyzer obtainable by using it. The polymer electrolyte membrane of the present invention contains a polymer electrolyte, of which the hydrogen gas permeation coefficient under the conditions of a temperature of 80° C. and a relative humidity of 10%, is at most 2.4 x 10?9 cm3.cm/(s.cm2.cmHg), wherein the membrane resistance value under the conditions of a temperature of 80° C. and a relative humidity of 50%, is from 50 to 150 mn.cm2.
    Type: Application
    Filed: August 20, 2021
    Publication date: December 9, 2021
    Applicant: AGC Inc.
    Inventors: Takumi OKUYAMA, Takeshi HIRAI
  • Publication number: 20210380732
    Abstract: To provide a sulfonic acid group-containing polymer which is capable of forming a low hydrogen permeable membrane, which shows a high ion exchange capacity, and which shows a proper softening temperature. The sulfonic acid group-containing polymer has units u1 represented by the following formula u1, units u2 represented by the following formula u2, and units u3 based on tetrafluoroethylene, in the formula u1, RF1 and RF2 are each independently a C1-3 perfluoroalkylene group, and Z+ is a hydrogen ion, a metal ion, or an ammonium ion, —[CF2—CF(CF2O—Rf1)]—??Formula u2 in the formula u2, Rf1 is a perfluoroalkyl group which may contain a SO3?Z+ group and/or an etheric oxygen atom.
    Type: Application
    Filed: August 20, 2021
    Publication date: December 9, 2021
    Applicant: AGC Inc.
    Inventors: Takeshi HIRAI, Hiroyuki WATABE, Susumu SAITO
  • Publication number: 20210332171
    Abstract: To provide a polymer wherein a linking group that connects the main chain of the polymer and a cyclic perfluoroaliphatic disulfonimide skeleton, is a fluoroalkylene group which may have an ether oxygen atom. A polymer which has either one or both of units represented by formula u1-1 and units represented by formula u1-2: RF1, RF2: a C1-3 perfluoroalkylene group; RF3: a C1-6 perfluoroalkylene group; m: 0 or 1; and X: a hydrogen atom, an alkali metal atom, a fluorine atom, an alkyl group, ammonium or the like.
    Type: Application
    Filed: June 18, 2021
    Publication date: October 28, 2021
    Applicant: AGC Inc.
    Inventors: Takeshi HIRAI, Daisuke JOMUTA, Chikaya TAMITSUJI, Takumi OKUYAMA
  • Publication number: 20210301119
    Abstract: To provide a perfluoropolymer capable of producing an electrolyte membrane excellent in electrical conductivity and mechanical strength under high temperature environment, as well as a liquid composition, a polymer electrolyte membrane, a membrane electrode assembly and a polymer electrolyte fuel cell, obtainable by using the perfluoropolymer. The perfluoropolymer of the present invention contains perfluoromonomer units, does not substantially contain units having a halogen atom other than a fluorine atom, does not substantially contain units having a ring structure, and has acid-type sulfonic acid groups, wherein the perfluoromonomer units contain at least one type of units A selected from the group consisting of perfluoro vinyl ether units and perfluoro allyl ether units; the ion exchange capacity is from 1.4 to 2.5 milliequivalent/gram dry resin; and the storage modulus at 120° C. is at least 60 MPa.
    Type: Application
    Filed: May 28, 2021
    Publication date: September 30, 2021
    Applicant: AGC Inc.
    Inventors: Takeshi HIRAI, Daisuke JOMUTA, Chikaya TAMITSUJI
  • Publication number: 20210301044
    Abstract: To provide an acid-type sulfonic acid group-containing polymer which is excellent in hydrogen gas barrier properties and hot water resistance and which generates less oligomer during production; a liquid composition and a polymer electrolyte membrane comprising this acid-type sulfonic acid group-containing polymer; and a membrane electrode assembly and a polymer electrolyte fuel cell provided with the polymer electrolyte membrane. This acid-type sulfonic acid group-containing polymer is a polymer which has perfluoromonomer units, no monomer units having a halogen atom other than a fluorine atom, and acid-type sulfonic acid groups, and of which the hydrogen gas permeability coefficient under the conditions of a temperature of 80° C. and a relative humidity of 10%, is at most 2.5×10?9 cm3·cm/(s·cm2·cmHg), and the mass reduction rate when being immersed in hot water at 120° C.
    Type: Application
    Filed: May 26, 2021
    Publication date: September 30, 2021
    Applicant: AGC Inc.
    Inventors: Takeshi HIRAI, Susumu SAITO, Hiroyuki WATABE, Chikaya TAMITSUJI, Daisuke JOMUTA
  • Publication number: 20210284771
    Abstract: To provide a perfluoropolymer capable of producing an electrolyte membrane excellent in mechanical strength in high temperature environments; as well as a liquid composition, polymer electrolyte membrane, membrane electrode assembly and polymer electrolyte water electrolyzer, obtainable by using the perfluoropolymer. The perfluoropolymer of the present invention contains perfluoromonomer units, does not substantially contain units having a halogen atom other than a fluorine atom, does not substantially contain units having a ring structure, and has acid-type sulfonic acid groups, wherein the perfluoromonomer units contain at least one type of units A selected from the group consisting of perfluorovinyl ether units and perfluoroallyl ether units; the ion exchange capacity is from 0.9 to 1.4 milliequivalent/gram dry resin; and the storage modulus at 120° C. is at least 100 MPa.
    Type: Application
    Filed: May 27, 2021
    Publication date: September 16, 2021
    Applicant: AGC Inc.
    Inventors: Takeshi HIRAI, Daisuke JOMUTA, Chikaya TAMITSUJI
  • Publication number: 20210284813
    Abstract: To provide a liquid composition capable of forming a membrane excellent in durability against hydrogen peroxide or peroxide radicals and excellent in hydrogen gas barrier property; a polymer electrolyte membrane; a membrane electrode assembly; and a polymer electrolyte fuel cell. Liquid composition comprising a liquid medium, an acid-type sulfonic acid group-containing fluorocarbon polymer of which the hydrogen gas permeation coefficient under the conditions of a temperature of 80° C. and a relative humidity of 10% is at most 2.5×10?9 cm3·cm/(s·cm2·cmHg), and cerium atoms; a polymer electrolyte membrane 15 comprising the acid-type sulfonic acid group-containing fluorocarbon polymer, and cerium atoms; and a membrane electrode assembly 10 comprising an anode 13 having a catalyst layer, a cathode 14 having a catalyst layer, and the polymer electrolyte membrane 15 disposed between the anode 13 and the cathode 14.
    Type: Application
    Filed: May 27, 2021
    Publication date: September 16, 2021
    Applicant: AGC Inc.
    Inventors: Takumi OKUYAMA, Takeshi HIRAI, Susumu SAITO, Chikaya TAMITSUJI, Daisuke JOMUTA
  • Publication number: 20210284772
    Abstract: To provide a method for producing a polymer, whereby it is possible to obtain a sulfonic acid group-containing polymer having a high TQ value and a high ion exchange capacity. A method for producing a fluorosulfonyl group-containing fluorinated polymer, which comprises polymerizing a monomer represented by the following formula ml and tetrafluoroethylene, at a temperature of at least 110° C. and at most 250° C.: in the above formula, RF1 and RF2 are each a C1-3 perfluoroalkylene group.
    Type: Application
    Filed: May 26, 2021
    Publication date: September 16, 2021
    Applicant: AGC Inc.
    Inventors: Takeshi HIRAI, Susumu SAITO
  • Publication number: 20200190025
    Abstract: A method for producing a fluorosulfonyl group-containing compound to obtain a compound represented by the following formula 5 from a compound represented by the following formula 1 as a starting material and a method for producing a fluorosulfonyl group-containing monomer in which the fluorosulfonyl group-containing compound is used: wherein R1 and R2 are a C1-3 alkylene group, and RF1 and RF2 are a C1-3 perfluoroalkylene group.
    Type: Application
    Filed: February 26, 2020
    Publication date: June 18, 2020
    Applicant: AGC Inc.
    Inventors: Takeshi HIRAI, Daisuke JOMUTA, Chikaya TAMITSUJI
  • Publication number: 20200190233
    Abstract: A fluorosulfonyl group-containing polymer having units represented by the following formula u1, a sulfonic acid group-containing polymer having fluorosulfonyl groups in the fluorosulfonyl group-containing polymer converted into sulfonic acid groups, its production method and its applications: wherein RF1 and RF2 are a C1-3 perfluoroalkylene group.
    Type: Application
    Filed: February 26, 2020
    Publication date: June 18, 2020
    Applicant: AGC Inc.
    Inventors: Takeshi HIRAI, Daisuke Jomuta, Chikaya Tamitsuji
  • Publication number: 20190131646
    Abstract: To provide an electrolyte material which has a high proton conductivity and which is excellent in hot water resistance. An electrolyte material which is formed of a polymer H having units represented by the formula u1 and units based on tetrafluoroethylene, wherein the polymer H has an equivalent weight EW of from 400 to 550 g/eq, and the mass reduction ratio when immersed in hot water at 120° C. for 24 hours is at most 15 mass %: wherein Q11 is a perfluoroalkylene group which may have an etheric oxygen atom, Q12 is a single bond or a perfluoroalkylene group which may have an etheric oxygen atom, Y1 is a fluorine atom or the like, s is 0 or 1, Rf1 is a perfluoroalkyl group which may have an etheric oxygen atom, X1 is an oxygen atom or the like, a is 0 when X1 is an oxygen atom, and Z+ is H+ or the like.
    Type: Application
    Filed: December 19, 2018
    Publication date: May 2, 2019
    Applicant: AGC Inc.
    Inventors: Susumu SAITO, Satoru HOMMURA, Takeshi HIRAI
  • Patent number: 10022716
    Abstract: To provide a simple method whereby an ionic polymer membrane having a high ion exchange capacity and a low water uptake can be produced by converting a —SO2F group in a polymer to a pendant group having multiple ion exchange groups, while preventing a cross-linking reaction. At the time of obtaining an ionic polymer membrane by converting —SO2F (group (1)) in a polymer sequentially to —SO2NZ1Z2 (group (2)), —SO2N?(M?+)SO2(CF2)2SO2F (group (3)), —SO2N?(H+)SO2(CF2)2SO2F (group (4)) and —SO2N?(M?+)SO2(CF2)2SO3?M?+ (group (5)), the polymer is formed into a polymer membrane in the state of any one of the groups (1) to (4), and the polymer membrane is thermally treated in the state of group (4). Here, Z1 and Z2 are hydrogen atoms, etc., M?+ is a monovalent cation, and M?+ is a hydrogen ion or a monovalent cation.
    Type: Grant
    Filed: March 30, 2015
    Date of Patent: July 17, 2018
    Assignee: Asahi Glass Company, Limited
    Inventor: Takeshi Hirai
  • Publication number: 20170151499
    Abstract: An object is to provide a mobile terminal and a control method for a mobile terminal that make it possible to enjoy a game even in a situation in which only one hand can be used. A mobile terminal according to the present invention is a mobile terminal used in a game. The mobile terminal according to the present invention includes a detection unit configured to detect an orientation of the mobile terminal and a control unit configured to change over a manipulation mode of a game depending upon the orientation of the mobile terminal detected by the detection unit.
    Type: Application
    Filed: February 13, 2017
    Publication date: June 1, 2017
    Applicant: NEILO INC.
    Inventor: Takeshi HIRAI
  • Patent number: 9636575
    Abstract: A mobile terminal, a control method for mobile terminal, and a program that make it possible to enjoy a game even in a situation in which only one hand can be used. A mobile terminal according to the invention is a mobile terminal used in a game. The mobile terminal according to the invention includes a detection unit configured to detect an orientation of the mobile terminal and a control unit configured to change over a manipulation mode of a game depending upon the orientation of the mobile terminal detected by the detection unit.
    Type: Grant
    Filed: August 7, 2014
    Date of Patent: May 2, 2017
    Assignee: NEILO INC.
    Inventor: Takeshi Hirai
  • 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
  • Publication number: 20160107081
    Abstract: A mobile terminal, a control method for mobile terminal, and a program that make it possible to enjoy a game even in a situation in which only one hand can be used. A mobile terminal according to the invention is a mobile terminal used in a game. The mobile terminal according to the invention includes a detection unit configured to detect an orientation of the mobile terminal and a control unit configured to change over a manipulation mode of a game depending upon the orientation of the mobile terminal detected by the detection unit.
    Type: Application
    Filed: August 7, 2014
    Publication date: April 21, 2016
    Applicant: NEILO INC.
    Inventor: Takeshi HIRAI
  • Patent number: D815182
    Type: Grant
    Filed: August 2, 2016
    Date of Patent: April 10, 2018
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Haruki Sugawara, Ryoichi Nakagawa, Akitoshi Kuroda, Takeshi Hirai