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Process to prepare stable trifluorostyrene containing compounds grafted to base polymers using an alcohol/water mixture

United States Patent Application

20060276556
A1
View the Complete Application 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 water/alcohol 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), Guersel, Selmiye Alkan (Brugg, CH), Scherer, Guenther Georg Anton (Haegglingen, CH), Han, Amy Qi (Hockessin, DE)
11/ 388,830
March 24, 2006
FIELD OF THE INVENTION [0001] The present invention relates to a novel compound grafted to a base polymer, and its use in electrochemical cells as membranes, and more particularly to the use of these grafted polymers in fuel cells. 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.