Patent ID: 7388104

Claim:
A fluorine-containing urethane compound of the general formula: [Rf-A 1 -(X 1 (OH))—(Y 1 ) a —OC(═O)NH—] m I[—NHC(═O)O—Y 2 ] n [—NHC(═O)O—((ClCH 2 —)X 2 O) b —R 1 ] k (1) wherein I is a group remaining after an isocyanate group is removed from a polyisocyanate compound selected from the group consisting of an aliphatic polyisocyanate and an aromatic polyisocyanate, Rf is a perfluoroalkyl group having 2 to 21 carbon atoms, A 1 is a direct bond or a divalent organic group having 1 to 21 carbon atoms, of the formula: —(CH 2 ) p — —CONR —R 11 —R 12 — —CH 2 C(OH)HCH 2 — —CH 2 C(OCOR 13 )HCH 2 — or —O—Ar—CH 2 — wherein R 11 is hydrogen or an alkyl group having 1 to 10 carbon atoms, R 12 is an alkylene group having 1 to 10 carbon atoms, R 13 is hydrogen or a methyl group, Ar is an arylene group having 6 to 20 carbon atoms optionally having a substituent, and p is the number of 1 to 10, X 1 and X 2 are trivalent linear or branched aliphatic group having 2 to 5 carbon atoms, Y 1 is a divalent organic group having 0 to 5 carbon atoms and 0 to 2 nitrogen atoms (provided that at least one carbon atom or nitrogen atom is present) and at least one hydrogen atom, Y 2 is a monovalent organic group optionally having a hydroxyl group, R 1 is a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, a is the number of 0 or 1, b is the number of 1 to 20, m is the number of 1 to 15, n and k are the number of 0 to 14, and the total of m, n and k is the number of 2 to 15.