Patent ID: 7947791

Claim:
A fluorinated polymer comprising repeating units (a) based on at least one monomer selected from the group consisting of compounds represented by the following formulae [I], [II], [III], [IV], [V] and [VI], as the ethylenic unsaturated compounds each having a hydroxyphenyl group: (wherein each of R 1 and R 2 which are independent of each other, is a hydrogen atom, a fluorine atom, a C 1-10 alkyl group or a C 1-10 alkoxyalkyl group containing an etheric oxygen atom, R 3 is a hydrogen atom, a fluorine atom or a methyl group, each of R 4 and R 6 is a single bond or a C 1-10 alkylene group which may contain an etheric oxygen atom, R 5 is a C 1-10 alkyl group which may contain an etheric oxygen atom, R 7 is a C 1-5 alkyl group, R 9 is a single bond, an oxygen atom or a C 1-10 alkylene group which may contain an etheric oxygen atom, and R 8 is one of groups represented by the formula (1): wherein n is an integer of from 1 to 5, and m is 0 or an integer of from 1 to 4, provided that n+m≦5), and having a Mooney viscosity (100° C.) of 10 to 200, which comprises the above repeating units (a), repeating units (b) based on at least one fluoromonomer selected from the group consisting of tetrafluoroethylene, hexafluoropropylene, vinylidene fluoride, 3,3,3-trifluoropropene, 1,3,3,3-tetrafluoropropene, 1,1,2-trifluoroethylene, vinyl fluoride, 1,2-difluoroethylene and CF 2 ═CF—O—R f (wherein R f is a C 1-8 saturated perfluoroalkyl group or a perfluoro(alkoxyalkyl) group) and, if necessary, repeating units (c) based on at least one hydrocarbon monomer selected from the group consisting of ethylene, propylene and CH 2 ═CH—O—R 1 (wherein R 1 is a C 1-8 saturated alkyl group or an alkoxyalkyl group), wherein (a)/((b)+(c))=0.0001 to 0.1 (molar ratio).