Patent ID: 8394865

Claim:
An ion exchange membrane for alkaline chloride electrolysis, comprising: a laminate comprising at least two polymer layers; wherein one layer comprises a polymer having carboxylic acid groups; and a second layer comprises a polymer having ionic groups, wherein the ionic groups are of formula (U1): wherein Q 1 is a perfluoroalkylene group which may have an etheric oxygen atom, Q 2 is a single bond or a perfluoroalkylene group which may have an etheric oxygen atom, R f1 is a perfluoroalkyl group which may have an etheric oxygen atom, X 1 is an oxygen atom, a nitrogen atom or a carbon atom, a is 0 when X 1 is an oxygen atom, 1 when X 1 is a nitrogen atom, or 2 when X 1 is a carbon atom, Y 1 is a fluorine atom or a monovalent perfluoroorganic group, r is 0 or 1, and M is a hydrogen atom or an alkali metal.