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：US20210301119A1

公开(公告)日：2021-09-30

申请号：US17333905

申请日：2021-05-28

Applicant: AGC Inc.

Inventor： Takeshi HIRAI ,  Daisuke JOMUTA ,  Chikaya TAMITSUJI

IPC: C08L27/18 ,  H01M8/1004 ,  H01M50/426 ,  H01M4/86

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.

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：US20210381119A1

公开(公告)日：2021-12-09

申请号：US17407225

申请日：2021-08-20

Applicant: AGC Inc.

Inventor： Takumi OKUYAMA ,  Takeshi HIRAI

IPC: C25B13/08 ,  C25B1/04 ,  C25B9/23

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.

公开(公告)号：US20240291009A1

公开(公告)日：2024-08-29

申请号：US18632721

申请日：2024-04-11

Applicant: AGC INC.

Inventor： Takeshi SHIONO ,  Takeshi HIRAI ,  Yuko ARINAMI ,  Kana TANABE ,  Kei ISHITSUKA

IPC: H01M8/06 ,  H01M8/0239

CPC classification number: H01M8/0693 ,  H01M8/0239

Abstract: A method for purifying a treatment target solution which can remove a compound having an aliphatic hydrocarbon group which has at least one ionic group and a fluorine atom efficiently is provided.
The method for purifying a treatment target solution of the present invention comprises bringing a treatment target solution containing a compound having an aliphatic hydrocarbon group which has at least one ionic group selected from the group consisting of a carboxylic acid group and a sulfonic acid group, and a fluorine atom and may contain an oxygen atom, at least one acid selected from the group consisting of HF and H2SO4 and water, into contact with a resin having a tertiary amino group to remove the compound having an aliphatic hydrocarbon group from the treatment target solution.

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：US20210332171A1

公开(公告)日：2021-10-28

申请号：US17351717

申请日：2021-06-18

Applicant: AGC Inc.

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

IPC: C08F214/26 ,  C08J5/22 ,  C08J5/18 ,  C08J5/24 ,  H01M8/1004 ,  B29C48/00

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.

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.