Patent ID: 7307131

Claim:
A fluorine-containing allyl ether polymer having a number average molecular weight of 1,000 to 1,000,000 and consisting of chains of at least one repeating unit selected from the group consisting essentially of a repeating unit of the formula: wherein A is alkyl or fluoroalkyl groups having 1 to 50 carbon atoms, alkenyl or fluoroalkenyl groups having 2 to 50 carbon atoms, alkynyl or fluoroalkynyl groups having 2 to 50 carbon atoms, alkyl or fluoroalkyl groups having an ether bond and 1 to 60 carbon atoms, alkenyl or fluoroalkenyl groups having an ether bond and 2 to 60 carbon atoms, alkynyl or fluoroalkynyl groups having an ether bond and 2 to 60 carbon atoms, aryl or fluoroaryl groups having 4 to 30 carbon atoms, and a repeating unit of the formula: wherein A 1 is a divalent organic group having 1 to 60 carbon atoms, and Y 1 is in which R 2 and R 3 are the same or different and a hydrogen atom or a hydrocarbon group having 1 to 20 carbon atoms, —O—CF═CF 2 , or —OCO—CZ 3 =CZ 1 Z 2 in which Z 1 and Z 2 are the same or different and a hydrogen atom or a fluorine atom, and Z 3 is a hydrogen atom, a fluorine atom, a chlorine atom or a trifluoromethyl group; provided that A may optionally include a sulfonic acid group or -SO 3 R′, in which R′ is a monovalent organic group.