Patents by Inventor Daisuke Jomuta

Daisuke Jomuta 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: 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: 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: 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
  • Patent number: 10975053
    Abstract: The present invention relates to a method for producing a 1,3-dioxolane compound represented by formula 1, the method containing step (a), in which hexafluoroacetone monohydrate is brought into contact with a metal fluoride, step (b), in which fluorine gas is brought into contact, and step (c), in which an olefin compound represented by formula 2 is brought into contact. In formulae 1 and 2, X1 to X4 each independently represent a hydrogen atom, fluorine atom, chlorine atom, or trifluoromethyl group.
    Type: Grant
    Filed: July 23, 2020
    Date of Patent: April 13, 2021
    Assignee: AGC INC.
    Inventors: Daisuke Jomuta, Yusuke Takahira, Nobuyuki Otozawa, Chikaya Tamitsuji
  • Publication number: 20200354332
    Abstract: The present invention relates to a method for producing a 1,3-dioxolane compound represented by formula 1, the method containing step (a), in which hexafluoroacetone monohydrate is brought into contact with a metal fluoride, step (b), in which fluorine gas is brought into contact, and step (c), in which an olefin compound represented by formula 2 is brought into contact. In formulae 1 and 2, X1 to X4 each independently represent a hydrogen atom, fluorine atom, chlorine atom, or trifluoromethyl group.
    Type: Application
    Filed: July 23, 2020
    Publication date: November 12, 2020
    Applicant: AGC Inc.
    Inventors: Daisuke JOMUTA, Yusuke TAKAHIRA, Nobuyuki OTOZAWA, 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: 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
  • Patent number: 10358400
    Abstract: A method for producing at least one olefin compound selected from the group consisting of a compound of formula (51) and a compound of formula (52), the method including reacting an olefin compound of formula (21) with a olefin compound of formula (31) in the presence of at least one metal catalyst selected from the group consisting of a compound of formula (11), a compound of formula (12), a compound of formula (13), a compound of formula (14), and a compound of formula (15).
    Type: Grant
    Filed: June 26, 2017
    Date of Patent: July 23, 2019
    Assignee: AGC Inc.
    Inventors: Yusuke Takahira, Daisuke Jomuta
  • Patent number: 9969890
    Abstract: Provided is a fluorinated ether compound capable of imparting excellent antifouling properties such as oil-based ink repellency, fingerprint stain removability, to a hard coating layer; a composition for forming a hard coating layer, and an article having an antifouling hard coating layer formed from the composition. The fluorinated ether compound has either a poly(oxyperfluoroalkylene) chain having a repeated unit that includes a C1-2 oxyperfluoroalkylene group and a C3-6 oxyperfluoroalkylene group, bonded to each other, or a poly(oxyperfluoroalkylene) chain having a repeated unit that contains a C4 oxyperfluoroalkylene group and a different oxyperfluoroalkylene group, bonded to each other, a linking group bonded to a first terminal of the poly(oxyperfluoroalkylene) chain, and at least one (meth)acryloyl group bonded to the linking group.
    Type: Grant
    Filed: August 10, 2015
    Date of Patent: May 15, 2018
    Assignee: Asahi Glass Company, Limited
    Inventors: Kiyotaka Takao, Nobuyuki Otozawa, Daisuke Jomuta, Kuniko Okano, Taiki Hoshino
  • Publication number: 20170335051
    Abstract: A method for producing a fluorine-containing polymer includes subjecting at least one kind of fluorine-containing cycloolefin compound selected from the group consisting of a fluorine-containing cycloolefin compound represented by the following formula (41) and a fluorine-containing cycloolefin compound represented by the following formula (42) to ring-opening metathesis polymerization in the presence of a metal-carbene complex compound (10) having an olefin metathesis reaction activity.
    Type: Application
    Filed: August 7, 2017
    Publication date: November 23, 2017
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Yusuke TAKAHIRA, Shinji WADA, Daisuke JOMUTA
  • Publication number: 20170291863
    Abstract: A method for producing at least one olefin compound selected from the group consisting of a compound of formula (51) and a compound of formula (52), the method including reacting an olefin compound of formula (21) with a olefin compound of formula (31) in the presence of at least one metal catalyst selected from the group consisting of a compound of formula (11), a compound of formula (12), a compound of formula (13), a compound of formula (14), and a compound of formula (15).
    Type: Application
    Filed: June 26, 2017
    Publication date: October 12, 2017
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Yusuke TAKAHIRA, Daisuke JOMUTA
  • Patent number: 9637650
    Abstract: To provide a fluorinated ether compound, a fluorinated ether composition and a coating liquid, whereby it is possible to form a surface-treated layer which has high initial water/oil repellency and which is excellent in abrasion resistance and fingerprint stain removability, and a substrate having a surface-treated layer and a method for its production. A fluorinated ether compound which has a poly(oxyperfluoroalkylene) chain (??) having a C4 oxyperfluoroalkylene unit (?) and an oxyperfluoroalkylene unit (?) other than the unit (?) and which has a hydrolysable silyl group on at least one terminal of the poly(oxyperfluoroalkylene) chain (??) via a linking group.
    Type: Grant
    Filed: June 6, 2014
    Date of Patent: May 2, 2017
    Assignee: Asahi Glass Company, Limited
    Inventors: Eisuke Murotani, Taiki Hoshino, Akira Isobe, Daisuke Shirakawa, Daisuke Jomuta, Nobuyuki Otozawa
  • Patent number: 9598345
    Abstract: The present invention relates to a method for producing an unsaturated-acid ester or an unsaturated acid, containing a step of reacting a compound (1) represented by the following formula (1) with a compound represented by the following formula (2) (excluding the compound (1)) in the presence of a Lewis acid catalyst at a temperature of the boiling point of the compound (1) or higher and 350° C. or lower, thereby obtaining products including a compound represented by the following formula (3): (in formula (1) and formula (3), R1, R2 and R4 each independently may be hydrogen atom or an alkyl group, R3 and R5 each independently are hydrogen atom or a deuterium atom, and X is a halogen atom; in formula (2) and formula (3), R6 may be hydrogen atom, an alkyl group or an aryl group, and R7 is hydrogen atom or a deuterium atom).
    Type: Grant
    Filed: January 8, 2016
    Date of Patent: March 21, 2017
    Assignee: ASAHI GLASS COMPANY, LIMITED
    Inventors: Tomoyuki Fujita, Koichi Murata, Naoko Shirota, Yusuke Suzuki, Daisuke Jomuta
  • Patent number: 9540404
    Abstract: To provide a fluorinated ether compound, a fluorinated ether composition and a coating liquid, whereby it is possible to form a surface-treated layer which has high initial water/oil repellency and which is excellent in abrasion resistance and fingerprint stain removability, and a substrate having a surface-treated layer and a method for its production. A fluorinated ether compound which has a poly(oxyperfluoroalkylene) chain ((??)n) made of at least two units (??) linked to one another, and which has a hydrolysable silyl group on at least one terminal of the chain ((??)n) via a linking group, wherein each unit (??) is a poly(oxyperfluoroalkylene) group comprising one to three groups (?) made of at least one type of a C1-2 oxyperfluoroalkylene group and one to three groups (?) made of at least one type of a C3-6 oxyperfluoroalkylene group.
    Type: Grant
    Filed: June 23, 2014
    Date of Patent: January 10, 2017
    Assignee: Asahi Glass Company, Limited
    Inventors: Eisuke Murotani, Taiki Hoshino, Akinobu Kunimoto, Daisuke Jomuta, Nobuyuki Otozawa
  • Publication number: 20160122279
    Abstract: The present invention relates to a method for producing an unsaturated-acid ester or an unsaturated acid, containing a step of reacting a compound (1) represented by the following formula (1) with a compound represented by the following formula (2) (excluding the compound (1)) in the presence of a Lewis acid catalyst at a temperature of the boiling point of the compound (1) or higher and 350° C. or lower, thereby obtaining products including a compound represented by the following formula (3): (in formula (1) and formula (3), R1, R2 and R4 each independently may be hydrogen atom or an alkyl group, R3 and R5 each independently are hydrogen atom or a deuterium atom, and X is a halogen atom; in formula (2) and formula (3), R6 may be hydrogen atom, an alkyl group or an aryl group, and R7 is hydrogen atom or a deuterium atom).
    Type: Application
    Filed: January 8, 2016
    Publication date: May 5, 2016
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Tomoyuki FUJITA, Koichi MURATA, Naoko SHIROTA, Yusuke SUZUKI, Daisuke JOMUTA
  • Publication number: 20150344703
    Abstract: To provide a fluorinated ether compound capable of imparting excellent antifouling properties (oil-based ink repellency, fingerprint stain removability) to a hard coating layer, etc., a composition for forming a hard coating layer, containing such a compound, and an article having an antifouling hard coating layer formed from such a composition.
    Type: Application
    Filed: August 10, 2015
    Publication date: December 3, 2015
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Kiyotaka TAKAO, Nobuyuki Otozawa, Daisuke Jomuta, Kuniko Okano, Taiki Hoshino
  • Publication number: 20140302332
    Abstract: To provide a fluorinated ether compound, a fluorinated ether composition and a coating liquid, whereby it is possible to form a surface-treated layer which has high initial water/oil repellency and which is excellent in abrasion resistance and fingerprint stain removability, and a substrate having a surface-treated layer and a method for its production. A fluorinated ether compound which has a poly(oxyperfluoroalkylene) chain ((??)n) made of at least two units (??) linked to one another, and which has a hydrolysable silyl group on at least one terminal of the chain ((??)n) via a linking group, wherein each unit (??) is a poly(oxyperfluoroalkylene) group comprising one to three groups (?) made of at least one type of a C1-2 oxyperfluoroalkylene group and one to three groups (?) made of at least one type of a C3-6 oxyperfluoroalkylene group.
    Type: Application
    Filed: June 23, 2014
    Publication date: October 9, 2014
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Eisuke MUROTANI, Taiki Hoshino, Akinobu Kunimoto, Daisuke Jomuta, Nobuyuki Otozawa
  • Publication number: 20140287240
    Abstract: To provide a fluorinated ether compound, a fluorinated ether composition and a coating liquid, whereby it is possible to form a surface-treated layer which has high initial water/oil repellency and which is excellent in abrasion resistance and fingerprint stain removability, and a substrate having a surface-treated layer and a method for its production. A fluorinated ether compound which has a poly(oxyperfluoroalkylene) chain (??) having a C4 oxyperfluoroalkylene unit (?) and an oxyperfluoroalkylene unit (?) other than the unit (?) and which has a hydrolysable silyl group on at least one terminal of the poly(oxyperfluoroalkylene) chain (??) via a linking group.
    Type: Application
    Filed: June 6, 2014
    Publication date: September 25, 2014
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Eisuke MUROTANI, Taiki Hoshino, Akira Isobe, Daisuke Shirakawa, Daisuke Jomuta, Nobuyuki Otozawa