| 摘要 |
Fluorine-containing urethanes represented by the general formula:
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ[Rf-A 1 -Z-X 1 -OC(=O)NH-] m I [-NHC(=O)O-Y 1 ] n [-NHC(=O)O-((ClCH 2 -)X 2 O) a -R 1 ] k €ƒ€ƒ€ƒ€ƒ€ƒ(1)
wherein I is a group derived from a polyisocyanate by removal of the isocyanato groups; Rf is perfluoroalkyl of 1 to 21 carbon atoms; A 1 is a direct bond or an organic group of 1 to 21 carbon atoms; Z is -S- or -SO 2 -; X 1 is a divalent, straight-chain or branched, C 1-5 aliphatic group which may have at least one hydroxyl group; X 2 is a trivalent, straight-chain or branched, C 2-5 aliphatic group; Y 1 is a monovalent organic group which is optionally hydroxylated; and R 1 is hydrogen or alkyl of 1 to 10 carbon atoms. |
