公开(公告)号：US20240254266A1

公开(公告)日：2024-08-01

申请号：US18621234

申请日：2024-03-29

Applicant: AGC Inc.

Inventor： Susumu SAITO ,  Satoru HOMMURA ,  Hiroyuki WATABE

IPC: C08F214/18 ,  C08F216/38 ,  C08J5/22 ,  H01M8/1004 ,  H01M8/1039 ,  H01M8/1088 ,  H01M8/10

CPC classification number: C08F214/184 ,  C08F216/38 ,  C08J5/225 ,  H01M8/1004 ,  H01M8/1039 ,  H01M8/1088 ,  C08J2327/12 ,  H01M2008/1095

Abstract: To provide a method for producing a fluorinated polymer, in which it is possible to efficiently and easily control the molecular weight to be proper when polymerizing a perfluoromonomer having a dioxolane ring containing a polymerizable double bond in the ring skeleton, and in which the obtainable fluorinated polymer is less susceptible to a decrease in molecular weight even when contacted with a base. A method for producing a fluorinated polymer, comprising polymerizing a raw-material mixture which contains at least one of a monomer composition M11 which comprises a perfluoromonomer represented by the formula m11 and a fluorinated monomer m11H having at least some of fluorine atoms of said perfluoromonomer substituted by hydrogen atoms, and a monomer composition M12 which comprises a perfluoromonomer represented by formula m12 and a fluorinated monomer m12H having at least some of fluorine atoms of said perfluoromonomer substituted by hydrogen atoms, wherein the total amount of the fluorinated monomer m11H and the fluorinated monomer m12H is from 10 to 1,100 ppm to the total amount of the monomer composition M11 and the monomer composition M12.

公开(公告)号：US20220251264A1

公开(公告)日：2022-08-11

申请号：US17725459

申请日：2022-04-20

Applicant: AGC INC.

Inventor： Takeshi HIRAI ,  Susumu SAITO ,  Hiroyuki WATABE

IPC: C08F216/14 ,  C08K3/08 ,  C08K3/04 ,  C08K3/22 ,  H01M8/1004 ,  H01M8/1039 ,  H01M8/1072

Abstract: The present invention provides a fluoropolymer containing fluorosulfonyl groups capable of forming a polymer electrolyte membrane with high conductivity and hot water resistance, a method for its production, a fluoropolymer containing acid-form sulfonic acid groups and a method for its production, a polymer electrolyte membrane, a membrane-electrode assembly and a polymer electrolyte fuel cell. The method for producing a fluoropolymer containing fluorosulfonyl groups of the present invention comprises copolymerizing a monomer m1 (CF2═CFCF2O-Q1-SO2F) and TFE in a reactor at a temperature of from 150 to 200° C. in the presence of a radical polymerization initiator, wherein the radical polymerization initiator is continuously or sequentially added into the reactor so that the concentration of the radical polymerization initiator is kept to at most 2.5 mass ppm of the initial feed of the monomer m1 present in the reactor before initiation of the copolymerization during the copolymerization, and the molar ratio of the total feed of the monomer m1 to the total feed of tetrafluoroethylene is from 1.5 to 20

公开(公告)号：US20230238558A1

公开(公告)日：2023-07-27

申请号：US18130518

申请日：2023-04-04

Applicant: AGC INC.

Inventor： Masako KAWAMOTO ,  Susumu SAITO

IPC: H01M8/1004 ,  H01M8/1039 ,  H01M4/86

CPC classification number: H01M8/1004 ,  H01M8/1039 ,  H01M4/8668 ,  H01M2008/1095

Abstract: To provide a membrane electrode assembly capable of forming a fuel cell excellent in power generation efficiency, and a polymer electrolyte fuel cell. The membrane electrode assembly of the present invention comprises an anode having a catalyst layer containing a proton-conducting polymer and a catalyst, a cathode having a catalyst layer containing a proton-conducting polymer and a catalyst, and a solid polymer electrolyte membrane disposed between the anode and the cathode, wherein the proton-conducting polymer contained in the catalyst layer of at least one of the anode and the cathode, is a polymer (H) having a cyclic ether structural unit and an ion exchange group, and the solid polymer electrolyte membrane contains a fluorinated polymer (S) having an ion exchange group; and the thickness of the solid polymer electrolyte membrane is from 5 to 15 μm, and the ratio of the content M1 [mol %] of the cyclic ether structure unit to the thickness T1 [μm] of the solid polymer electrolyte membrane is 4.5 or more.

公开(公告)号：US20210284772A1

公开(公告)日：2021-09-16

申请号：US17331098

申请日：2021-05-26

Applicant: AGC Inc.

Inventor： Takeshi HIRAI ,  Susumu SAITO

IPC: C08F216/14 ,  C08J5/22

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.

公开(公告)号：US20190131646A1

公开(公告)日：2019-05-02

申请号：US16225607

申请日：2018-12-19

Applicant: AGC Inc.

Inventor： Susumu SAITO ,  Satoru HOMMURA ,  Takeshi HIRAI

IPC: H01M8/1039 ,  H01M8/1004 ,  C08F2/04 ,  C08F14/26

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.

公开(公告)号：US20230307680A1

公开(公告)日：2023-09-28

申请号：US18325154

申请日：2023-05-30

Applicant: AGC Inc.

Inventor： Susumu SAITO ,  Satoru HOMMURA ,  Takeshi HIRAI

IPC: H01M8/1039 ,  C08F214/26 ,  H01B1/06 ,  C08J5/22 ,  H01M8/1023 ,  H01M8/1088 ,  H01M8/1067 ,  C08F2/04 ,  C08F14/26 ,  H01M8/1004

CPC classification number: H01M8/1039 ,  C08F214/26 ,  H01B1/06 ,  C08J5/22 ,  H01M8/1023 ,  H01M8/1088 ,  H01M8/1067 ,  C08F2/04 ,  C08F14/26 ,  H01M8/1004 ,  H01M2300/0082 ,  H01M2008/1095

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.

公开(公告)号：US20220006111A1

公开(公告)日：2022-01-06

申请号：US17472999

申请日：2021-09-13

Applicant: AGC Inc.

Inventor： Susumu SAITO

IPC: H01M8/1004 ,  H01M50/426 ,  H01M50/497 ,  H01M8/1039 ,  H01M50/491 ,  H01M50/406

Abstract: To provide a membrane electrode assembly which can suppress cracking of the catalyst layers.
The membrane electrode assembly of the present invention is a membrane electrode assembly comprising an anode having a catalyst layer containing a proton-conductive polymer, a cathode having a catalyst layer containing a proton-conductive polymer, and a polymer electrolyte membrane disposed between the anode and the cathode, wherein the proton-conductive polymer contained in the catalyst layer of at least one of the anode and the cathode is a polymer (H) having units containing a cyclic ether structure and sulfonic acid-type functional groups, and the polymer electrolyte membrane contains a porous material containing a fluorinated polymer, and a fluorinated polymer (S) having sulfonic acid-type functional groups.

公开(公告)号：US20210380732A1

公开(公告)日：2021-12-09

申请号：US17407236

申请日：2021-08-20

Applicant: AGC Inc.

Inventor： Takeshi HIRAI ,  Hiroyuki WATABE ,  Susumu SAITO

IPC: C08F14/26 ,  H01M8/18 ,  H01M50/414 ,  H01M8/1004 ,  H01M50/449 ,  C08F8/12

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.

公开(公告)号：US20210301044A1

公开(公告)日：2021-09-30

申请号：US17330788

申请日：2021-05-26

Applicant: AGC Inc.

Inventor： Takeshi HIRAI ,  Susumu SAITO ,  Hiroyuki WATABE ,  Chikaya TAMITSUJI ,  Daisuke JOMUTA

IPC: C08F16/30 ,  C08J5/22 ,  B01J39/20 ,  B01J39/05 ,  H01M8/1039 ,  H01M8/1067 ,  H01M8/1023 ,  H01M8/1004 ,  C25B1/04 ,  C25B13/08

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. for 24 hours is at most 15 mass %, wherein the TQ value of a polymer having fluorosulfonyl groups which is a precursor of the polymer having acid-type sulfonic acid groups, is at least 220° C.

公开(公告)号：US20210284813A1

公开(公告)日：2021-09-16

申请号：US17332145

申请日：2021-05-27

Applicant: AGC Inc.

Inventor： Takumi OKUYAMA ,  Takeshi HIRAI ,  Susumu SAITO ,  Chikaya TAMITSUJI ,  Daisuke JOMUTA

IPC: C08J5/22 ,  H01M8/1039 ,  H01M8/1004 ,  H01M8/1051 ,  C08L29/10

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.