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Process to prepare stable trifluorostyrene containing compounds grafted to base polymers using a solvent/water mixture

United States Patent

June 15, 2010
View the Complete Patent at the US Patent & Trademark Office
A fluorinated ion exchange polymer is prepared by grafting at least one grafting monomer derived from trifluorostyrene on to at least one base polymer in a organic solvent/water mixture. These ion exchange polymers are useful in preparing catalyst coated membranes and membrane electrode assemblies used in fuel cells.
Roelofs; Mark Gerrit (Hockessin, DE), Yang; Zhen-Yu (Hockessin, DE), Han, legal representative; Amy Qi (Hockessin, DE)
E.I. du Pont de Nemours and Company (Wilmington, DE)
11/ 388,272
March 24, 2006
This invention was made with government support under Contract No. DE-FC04-02AL67606 awarded by the U.S. Department of Energy. The government has certain rights in the invention.