Patent ID: 7550545

Claim:
A fluorinated diene represented by the following formula (2): CF 2 ═CFCH 2 CH((CH 2 ) a C(CF 3 ) b (R 3 ) c OR 4 )—CH 2 CH═CH 2 (2) wherein a is an integer of from 0 to 3, b and c are integers of from 0 to 2 satisfying b+c=2, R 3 is a hydrogen atom or a methyl group, and R 4 is an alkyl group having at most 5 carbon atoms which may have an etheric oxygen atom, an alkoxycarbonyl group having at most 6 carbon atoms or CH 2 R 5 (wherein R 5 is an alkoxycarbonyl group having at most 6 carbon atoms).