Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2005-10-14
2009-11-10
Zimmer, Marc S (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
C526S075000, C526S247000, C526S249000, C526S317100
Reexamination Certificate
active
07615600
ABSTRACT:
Fluoropolymers comprising at least one repeat unit of formula (I):wherein:groups X and Y, identical or different, represent H or F;group Z represents F or a perfluorinated alkyl group;group W represents CH2O or CF2O or CO2;group Ar represents a divalent group including at least one optionally substituted carbon-containing aromatic cycle;group Q represents a single bond, (CF2)nwith 1≦n≦10, or C2F4OC2F4;group G represents a cation exchanging group, preferably selected among:SO2R1, with R1representing OH, F or Cl; orP(═O) (OR2)2with R2representing H or an optionally substituted alkyl group; orCO2Hand having ion exchange capacity not less than 0.5 meq/g polymer are provided. Methods of synthesis, membranes obtained using these polymers and fuel cell systems containing such membranes are also provided.
REFERENCES:
patent: 4778629 (1988-10-01), Grabley et al.
patent: 2002/0146639 (2002-10-01), Brock et al.
patent: 2 843 398 (2004-02-01), None
patent: WO96/40798 (1996-12-01), None
Mislavsky, “Fluorinated Polymers with Functional Groups: Synthesis and Applications, Langmuir-Blodgett Films from Functional Fluoropolymers”, Fluoropolymers 1: Synthesis, 1999, Kluwer Academic/Plenum Publishers, p. 100-101.
translation of FR2843398, Didier et al., Sept. 2008.
Ameduri Bruno
Boutevin Bernard
Capron Philippe
Souzy Renaud
Buie Nicole M
Commissariat a l''Energie Atomique
Fleckenstein Lee J.
Heslin Rothenberg Farley & & Mesiti P.C.
Zimmer Marc S
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