Patent ID: 8563769

Claim:
A fluorine-comprising compound of formula (1): Rf 1 —C p H 2p —CH(OH)—C q H 2q —NR—C r H 2r —(O) n —SO 3 M (1), wherein Rf 1 is a perfluoroalkyl group comprising 1 to 6 carbon atoms, p, q, and r are independently an integer of 1 to 6, M is a cationic atom or atomic group, n is 0 or 1, and R is hydrogen atom, an alkyl group comprising 1 to 12 carbon atoms, or a group of formula (2): Rf 2 —C s H 2s —CH(OH)—C t H 2t — (2), wherein Rf 2 is a perfluoroalkyl group comprising 1 to 6 carbon atoms, and s and t are independently an integer of 1 to 6.