Patent ID: 7947422

Claim:
A fluorine-containing compound represented by the formula 3, where R 1 is a methyl group or trifluoromethyl group, each R 2 is independently a hydrogen atom or a group containing (a) a hydrocarbon group having a straight-chain, branched or ring form and having a carbon atom number of 1-25 or (b) an aromatic hydrocarbon group, each of the hydrocarbon group and the aromatic hydrocarbon group independently optionally containing at least one feature selected from the group consisting of a fluorine atom, an oxygen atom and a carbonyl bond, each R 4 is independently (a) a functional group selected from the group consisting of vinyl group, allyl group, epoxy group, and ethynyl group, or (b) a substituent having at least one fluorine atom substituted for a part or all of hydrogen atoms of the functional group, l is an integer of from 0 to 2, each of m and n is independently an integer of 1-9 and o is an integer of 1-8 to satisfy an expression of m+n≦o+2, and when at least one of R 1 , R 2 and R 4 is in a plural number, the at least one of R 1 , R 2 and R 4 may be identical with or different from each other.