Patent ID: 8124295
Filing Date: 2012-02-28
Classification: C08J,H01M,Y02E

Abstract:
1. A polymer comprising repeating units represented by the following formula (U1) and repeating units represented by the following formula (U2): 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 is an oxygen atom, a nitrogen atom or a carbon atom, “a” is 0 when X is an oxygen atom, 1 when X is a nitrogen atom, or 2 when X is a carbon atom, Y is a fluorine atom or a monovalent perfluoroorganic group, s is 0 or 1, R f2 is a perfluoroalkyl group, Z is a fluorine atom or a monovalent perfluoroorganic group, and t is an integer of from 0 to 3.