Low equivalent weight ionomer

Details Low equivalent weight ionomer Low equivalent weight ionomer

2005-03-01

2005-03-01

Wu, David W. (Department: 1713)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S213000, C526S242000, C204S296000

Reexamination Certificate

active

06861489

ABSTRACT:
An ionomer and a process for forming the ionomer such that the ionomer has (1) low equivalent weight; below 950, preferably between 625 and 850, and most preferably between about 700 and about 800; and (2) high conductivity, (greater than 0.15 S/cm). In an alternative embodiment, the ionomer has (1) low equivalent weight; below 950, preferably between 625 and 850, and most preferably between about 700 and about 800; and (2) acceptably low hydration, (less than about 75 weight percent). These ionomers are adapted to be processed into thin films that have acceptable physical stability. They are thus extremely well-suited for low humidity or high temperature fuel cell applications.

REFERENCES:
patent: 3282875 (1966-11-01), Connolly et al.
patent: 3291843 (1966-12-01), Fritz et al.
patent: 3310606 (1967-03-01), Fritz
patent: 4358545 (1982-11-01), Ezzell et al.
patent: 4417969 (1983-11-01), Ezzell et al.
patent: 4478695 (1984-10-01), Ezzell et al.
patent: 4661411 (1987-04-01), Martin et al.
patent: 4940525 (1990-07-01), Ezzell et al.
patent: 5082472 (1992-01-01), Mallouk et al.
patent: 5246792 (1993-09-01), Watanabe
patent: 5264508 (1993-11-01), Ishibe et al.
patent: 5350497 (1994-09-01), Hung et al.
patent: 5393852 (1995-02-01), Ishibe et al.
patent: 5463005 (1995-10-01), Desmarteau
patent: 5547551 (1996-08-01), Bahar et al.
patent: 5599614 (1997-02-01), Bahar et al.
patent: 5608022 (1997-03-01), Nakayama et al.
patent: 5654109 (1997-08-01), Plowman et al.
patent: 5718947 (1998-02-01), Martin et al.
patent: 5981097 (1999-11-01), Rajendran
patent: 6046271 (2000-04-01), Wu et al.
patent: 6054230 (2000-04-01), Kato
patent: 6156451 (2000-12-01), Banerjee et al.
patent: 6248469 (2001-06-01), Formato et al.
patent: 6255536 (2001-07-01), Worm et al.
patent: RE37307 (2001-08-01), Bahar et al.
patent: 6388139 (2002-05-01), Resnick
patent: WO 9115828 (1990-12-01), None
patent: WO 9403503 (1994-02-01), None
patent: WO 9952954 (1999-10-01), None
patent: WO 0024709 (2000-05-01), None
patent: WO 0052060 (2000-09-01), None
patent: 1 179 548 (2002-02-01), None
patent: 1 550 874 (1979-08-01), None
patent: WO 0079629 (2000-12-01), None
“Perfluorinated Resinsulfonic Acid (Nafion-H) Catalysis in Synthesis”, by G. Olah, P. Iyer, and P. Surya, in Journal: Synthesis (Stuttgart), 1986 (7) 513-531 (Translation).
“Perfluorinated Resinsulfonic Acid (Nafion-H) Catalysis in Organic Synthesis” by T. Yamato in Yuki Gosei Kagaku Kyokaishi/Journal of Synthetic Organic Chemistry, vol. 53, No. 6, Jun. 1995, pp. 487-499.
“The Use of Nafion 415 Membrane in Copper Electrowinning form Chloride Solution” by R. Raudsepp and M. Vreugde, in CIM Bulletin, 1982 V75, N842, P122.
“Mini-Emulsion Polymerization” by E. David Sudol and Mohamed S. El-Aasser, in “Emulsion Polymerization and Emulsion Polymers,” P. A. Lowell and M.S. El-Aaser, John Wiley and Sons, Ltd., New York 1997, p. 700-709.
“Characterization of Polymer Electrolytes for Fuel Cell Applications,” T. Zawodzinski, T. Springer, F. Uribe and S. Gottesfeld, Solid State Ionics, vol. 60, p. 199 (1993).
“Investigation of the Proton Transport in Nafioni Membranes as a Function of Direction, Temperature and Relative Humidity,” G. Blumenthal, M. Cappadonia, and M. Lehmann, Ionics, vol. 2, p. 102-106 (1996).
“Chemical and Morphological Properties of Solution-Cast Perfluorosulfonate Ionomers,” by R. Moore and C. Martin, Macromolecules, vol. 21, No. 1988, p. 1334-1339.
“Morphology and Chemical Properties of the Dow Perfluorosulfonate Ionomers,” R. Moore and C. Martin, Macromolecules 1989, vol. 22, pp. 3594-3599 (1989).
“Water Uptake by and Transport Through Nafion 117 Membranes,” T. Zawodzinski, C. Derouin, S. Radzinski, R. Sherman, V. Smith, T.Springer, and S. Gottesfeld, Journal of the Electrochemical Society, vol. 140, No. 1041-1047.
Product Literature from Perma Pure, Inc., Toms River, NJ copyright 2000.
“Perfluorosulphonic Acid (Nafion) Membrane as a Separator for an Advanced Alkaline Water Elecrolyser,” R. Yen, J. McBreen, G. Kissel, F. Kulesa, and S. Srinivasan, Journal of Applied Electrochemistry, vol. 10 (1980), p. 741-747.
Product Literature on Nafion from Du Pont Fluororproducts, Fayetteville, NC 28306 (Sep. 2001).
“Uber Erstarrungs und Quellungserscheinungen von Gelatine,” Paul Schroeder, Z. Physik Chem., Vo. 75 (1903) , p. 75.

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