Fluorocopolymer material with sulfonic acid functional groups as a solid polyelectrolyte for use in fuel cells
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H01M-010/08
H01M-010/06
출원번호
US-0700185
(1999-05-10)
등록번호
US-7455934
(2008-11-25)
우선권정보
JP-10-130421(1998-05-13)
국제출원번호
PCT/JP99/002398
(1999-05-10)
§371/§102 date
20001218
(20001218)
국제공개번호
WO99/059216
(1999-11-18)
발명자
/ 주소
Araki,Takayuki
Oka,Noritoshi
Tanaka,Yoshito
Nakamura,Takayuki
Shimizu,Tetsuo
출원인 / 주소
Daikin Industries, Ltd.
대리인 / 주소
Schulman,B. Aaron
인용정보
피인용 횟수 :
5인용 특허 :
12
초록▼
The invention is a material for a solid polyelectrolyte, comprising a multi-segmented fluoropolymer that comprises a block copolymer and/or a graft copolymer, wherein the copolymer contains one or more blocks essentially consisting of segment A and one or more blocks essentially consisting of segmen
The invention is a material for a solid polyelectrolyte, comprising a multi-segmented fluoropolymer that comprises a block copolymer and/or a graft copolymer, wherein the copolymer contains one or more blocks essentially consisting of segment A and one or more blocks essentially consisting of segment B, the segment A combines with the segment B, wherein the segment A has a molecular weight of 5,000 to 1,000.000, and the Segment A is a copolymer chain comprising (a) an ethylenicfluoromonomer containing sulfonic acid functional groups each represented by Formula (1) CX2═CX1--(O)n--Rf--SO2Y, wherein X and X1 may be the same or different and are each hydrogen or fluorine; Y is FI, Cl, or OY1 wherein y1 is hydrogen, alkali metal or C1-C5 alkyl; Rf is C1 to C40 divalent fluoroalkylene or C1 to C40 divalent fluoroalkylene having one or more ether bonds; and n is 0 or 1; and (b) at least one type of ethylenic fluoromonomer copolymerizable with the ethylenic fluoromonomer (a) and containing no sulfonic acid functional groups, the segment B is a fluoropolymer containing no sulfonic acid functional groups, has a molecular weight of 3,000 to 1,200,000, and has a crystalline melting point of 100�� C. or higher or a glass transition point of 100�� C. or higher, wherein the ratio of segment A:segment B in the segmented fluoropolymer is 5:9˜to 98:2 30:70 to 90:10 wt. %.
대표청구항▼
The invention claimed is: 1. A material for a solid polyelectrolyte, comprising a multi-segmented fluoropolymer that comprises a block copolymer and/or a graft copolymer, wherein the copolymer contains one or more blocks essentially consisting of segment A and one or more blocks essentially consist
The invention claimed is: 1. A material for a solid polyelectrolyte, comprising a multi-segmented fluoropolymer that comprises a block copolymer and/or a graft copolymer, wherein the copolymer contains one or more blocks essentially consisting of segment A and one or more blocks essentially consisting of segment B, the segment A combines with the segment B, wherein the segment A has a molecular weight of 5,000 to 1,000,000, and the Segment A is a copolymer chain comprising: (a) an ethylenic fluoromonomer containing sulfonic acid functional groups each represented by Formula (1) description="In-line Formulae" end="lead"CX2═CX1--(O)n--Rf--SO2 Y (1)description="In-line Formulae" end="tail" wherein X and X1 may be the same or different and are each hydrogen or fluorine; Y is F, Cl, or OY1 wherein Y1 is hydrogen, alkali metal or C1 to C5 alkyl; Rf is C1 to C40 divalent fluoroalkylene or C1 to C40 divalent fluoroalkylene having one or more ether bonds; and n is 0 or 1; and (b) at least one type of ethylenic fluoromonomer copolymerizable with the ethylenic fluoromonomer (a) and containing no sulfonic acid functional groups, the segment B is a fluoropolymer containing no sulfonic acid functional groups, has a molecular weight of 3,000 to 1,200,000, and has a crystalline melting point of 100�� C. or higher or a glass transition point of 100�� C. or higher, wherein the ratio of segment A:segment B in the segmented fluoropolymer is 30:70 to 90:10 wt. %. 2. The material according to claim 1, wherein the fluoropolymer segment B is a polymer comprising 85 to 100 mol % of tetrafluoroethylene and 15 to 0 mol % of a monomer represented by Formula (3) description="In-line Formulae" end="lead"CF2═CF--Rfa (3)description="In-line Formulae" end="tail" wherein Rfa is CF3 or ORfb wherein Rfb is C1 to C5 perfluoroalkyl. 3. The material according to claim 1, wherein the multi-segmented fluoropolymer has an equivalent weight of 400 to 1600. 4. A solid polyelectrolyte membrane comprising the multi-segmented fluoropolymer according to claim 1. 5. The solid polyelectrolyte membrane according to claim 4, wherein the multi-segmented fluoropolymer contains protonated sulfonic acid (SO3H) groups as the sulfonic acid functional groups, and has a modulus of elasticity of at least 1��108 dyn/cm2 at 110�� C. or higher. 6. The solid polyelectrolyte membrane according to claim 5, wherein the equivalent weight of the whole multi-segmented fluoropolymer is 1600 or less. 7. The material according to claim 1, wherein the at least one type of ethylenic fluoromonomer (b) containing no sulfonic acid functional groups is tetrafluoroethylene.
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