Patent ID: 8481661

Claim:
A noncrystalline fluoroelastomer which is a copolymer comprising vinylidene fluoride, a fluoromonomer represented by the general formula (1): CH 2 ═CFR f (1) wherein R f is a straight or branched fluoroalkyl group containing 1 to 12 carbon atoms, and another monomer copolymerizable with both vinylidene fluoride and said fluoromonomer of formula (1), and has a vinylidene fluoride units/fluoromonomer units mol ratio of 85/15 to 20/80, contains the other monomer units in the amount of 0 to 50 mol percent of all the monomer units, has a glass transition temperature of not higher than 25° C. and contains at least one iodine atom and/or at least one bromine atom, the total content thereof being 0.001 to 10% by weight.