Patent ID: 7022428
Filing Date: 2006-04-04
Classification: B01D,C08F,C08J,H01M,Y02E,Y10T

Abstract:
1. A membrane electrode assembly comprising an anode and a cathode sandwiching a membrane comprising a fluorinated ionomer comprising at least (a) a substantially fluorinated backbone; (b) pendant groups derived from an ionomeric monomer of the formula  where X is F, Cl or Br or mixtures thereof; n is an integer equal to zero, one or two; R (c) pendant groups derived from a vinyl ether monomer that has at least two vinyl ether groups of the form, CA wherein the concentration of the pendant groups derived from the ionomeric monomer and the vinyl ether monomer is between about 10 mole percent and about 45 mole percent of the final product, and wherein the concentration of the pendant groups derived from the vinyl ether monomer is present in the final product between about 0.05 and about 2 mole percent.