Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Include electrolyte chemically specified and method
Reexamination Certificate
1999-05-10
2008-11-25
Ruthkosky, Mark (Department: 1795)
Chemistry: electrical current producing apparatus, product, and
Current producing cell, elements, subcombinations and...
Include electrolyte chemically specified and method
C429S314000, C429S317000, C521S028000, C427S384000, C204S252000
Reexamination Certificate
active
07455934
ABSTRACT:
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 X1may be the same or different and are each hydrogen or fluorine; Y is FI, Cl, or OY1wherein y1is hydrogen, alkali metal or C1-C5alkyl; Rf is C1to C40divalent fluoroalkylene or C1to C40divalent 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. %.
REFERENCES:
patent: 3282875 (1966-11-01), Connolly et al.
patent: 3692569 (1972-09-01), Grot
patent: 4330654 (1982-05-01), Ezzell et al.
patent: 5399184 (1995-03-01), Harada
patent: 5422411 (1995-06-01), Wei et al.
patent: 5498639 (1996-03-01), Wei et al.
patent: 5523180 (1996-06-01), Armand et al.
patent: 5547551 (1996-08-01), Bahar et al.
patent: 5599638 (1997-02-01), Surampudi
patent: 5635039 (1997-06-01), Cisar et al.
patent: 6242123 (2001-06-01), Nezu
patent: 6248469 (2001-06-01), Formato et al.
patent: 6492431 (2002-12-01), Cisar
patent: 6495209 (2002-12-01), Cisar
patent: 06-260184 (1994-09-01), None
patent: 11-204121 (1999-07-01), None
patent: WO 82/02564 (1982-08-01), None
Schmidt-Rohr, K. Physical chemistry of polymers; Iowa State University, 1999.
Scherer et al., “Membrel-Water Electrolysis Cells with a Fluorinated Cation Exchange Membrane”,J. Elecrochem. Soc.: Electrochemical Science and Technology, Dec. 1988, pp. 3071-3073.
Araki Takayuki
Nakamura Takayuki
Oka Noritoshi
Shimizu Tetsuo
Tanaka Yoshito
Daikin Industries Ltd.
Ruthkosky Mark
Schulman B. Aaron
Stites & Harbison PLLC
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