Patent attributes
A fluoropolymer (A) having units derived from monomer units formed by cyclopolymerization of at least one fluorinated diene selected from a fluorinated diene represented by the formula (1) and a fluorinated diene represented by the formula (2), and units derived from monomer units formed by cyclopolymerization of a fluorinated diene represented by the formula (3):CF2═CFCF2—C(CF3)(OR1)—CH2CH═CH2 (1)CF2═CFCH2—CH((CH2)nC(CF3)2(OR1))—CH2CH═CH2 (2)CF2═CFCH2—CH(COOR2)—CH2CH═CH2 (3)wherein R1 represents a hydrogen atom, a blocked group of a hydroxyl group capable of being converted into a hydrogen atom by an acid, or a blocked carboxyl group-containing organic group capable of being converted into a carboxyl group-containing organic group by an acid, R2 represents a hydrocarbon group having at most 20 carbon atoms, and n represents 0 or 1.
