Agc Inc.

Asahi Glass Company, Limited

Daisuke Jomuta

Takeshi Hirai

Chikaya Tamitsuji

Nobuyuki Otozawa

Taiki Hoshino

Susumu Saito

Eisuke Murotani

Takumi Okuyama

Yusuke Takahira

Koichi Murata

Daisuke Shirakawa

Tomoyuki Fujita

Akira Isobe

Yusuke Suzuki

Hiroyuki Watabe

Naoko Shirota

Kiyotaka Takao

Kuniko Okano

Akinobu Kunimoto

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.

Perfluoropolymer, liquid composition, polymer electrolyte membrane, membrane electrode assembly and polymer electrolyte fuel cell

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 Rand Rare a Calkylene group, and Rand Rare a Cperfluoroalkylene group.

Fluorosulfonyl group-containing compound, fluorosulfonyl group-containing monomer, and their production methods

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: R, R: a Cperfluoroalkylene group; R: a Cperfluoroalkylene group; m: 0 or 1; and X: a hydrogen atom, an alkali metal atom, a fluorine atom, an alkyl group, ammonium or the like.

Polymer, method for producing polymer, and method for producing membrane

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 2.5×10cm·cm/(s·cm·cmHg), and cerium atoms; a polymer electrolyte membranecomprising the acid-type sulfonic acid group-containing fluorocarbon polymer, and cerium atoms; and a membrane electrode assemblycomprising an anodehaving a catalyst layer, a cathodehaving a catalyst layer, and the polymer electrolyte membranedisposed between the anodeand the cathode

Liquid composition, polymer electrolyte membrane, membrane electrode assembly and polymer electrolyte fuel cell

An acid-type sulfonic acid group-containing polymer containing perfluoromonomer units, no monomer units having a halogen atom other than a fluorine atom, and acid type sulfonic acid groups, whose hydrogen gas permeability coefficient under the conditions of a temperature of 80° C. and a relative humidity of 10% is at most 2.5×10cm·cm/(s·cm·cmHg), and whose mass reduction rate when immersed in hot water at 120° C. for 24 hours is at most 15 mass %. Liquid composition, membrane electrode assembly, polymer electrolyte fuel cell, and ion exchange membrane utilizing the acid-type sulfonic acid group-containing polymer.

Acid-type sulfonic acid group-containing polymer, liquid composition, polymer electrolyte membrane, membrane electrode assembly, polymer electrolyte fuel cell and ion exchange membrane for water electrolysis

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&#xb0; C. is at least 100 MPa.

Perfluoropolymer, liquid composition, polymer electrolyte membrane, membrane electrode assembly and polymer electrolyte water electrolyzer

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 Rand Rare a Cperfluoroalkylene group.

Fluorosulfonyl group or sulfonic acid group-containing polymer, its production method and its application

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, Xto Xeach independently represent a hydrogen atom, fluorine atom, chlorine atom, or trifluoromethyl group. 

Production methods for 1,3-dioxolane compound and perfluoro(2,2-dimethyl-1,3-dioxole)

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). 

Method for producing olefin containing chlorine and fluorine

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 Coxyperfluoroalkylene group and a Coxyperfluoroalkylene group, bonded to each other, or a poly(oxyperfluoroalkylene) chain having a repeated unit that contains a Coxyperfluoroalkylene 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.

Fluorinated ether compound, composition for forming hard coating layer, and article having hard coating layer

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 (&#x3b1;&#x3b2;) having a Coxyperfluoroalkylene unit (&#x3b1;) and an oxyperfluoroalkylene unit (&#x3b2;) other than the unit (&#x3b1;) and which has a hydrolysable silyl group on at least one terminal of the poly(oxyperfluoroalkylene) chain (&#x3b1;&#x3b2;) via a linking group.

Fluorinated ether compound, fluorinated ether composition and coating liquid, and substrate having surface-treated layer and method for its production

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&#xb0; C. or lower, thereby obtaining products including a compound represented by the following formula (3): (in formula (1) and formula (3), R, Rand Reach independently may be hydrogen atom or an alkyl group, Rand Reach independently are hydrogen atom or a deuterium atom, and X is a halogen atom; in formula (2) and formula (3), Rmay be hydrogen atom, an alkyl group or an aryl group, and Ris hydrogen atom or a deuterium atom).

Method for producing unsaturated acid ester or unsaturated acid

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 ((&#x3b1;&#x3b2;)) made of at least two units (&#x3b1;&#x3b2;) linked to one another, and which has a hydrolysable silyl group on at least one terminal of the chain ((&#x3b1;&#x3b2;)) via a linking group, wherein each unit (&#x3b1;&#x3b2;) is a poly(oxyperfluoroalkylene) group comprising one to three groups (&#x3b1;) made of at least one type of a Coxyperfluoroalkylene group and one to three groups (&#x3b2;) made of at least one type of a Coxyperfluoroalkylene group.

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Tokyo, Japan

Daisuke Jomuta