| 摘要 |
<p>Fluorine-containing surfactants according to formula (Rf-X)n-A-L-Z wherein Rf is a short-chain fluorine-containing group derived from hexafluoropropylene or trifluorochloroethylene, X is -O-, -S-, or -SO2-, n is at least 2, the Rf groups being same or different, L is a monovalent bond or a bivalent bridging group such as -COO-alkylene, -CONR1-alkylene, or -SO2NR1-alkylene, wherein R1 is hydrogen or C1-C5 alkyl, and Z represents a hydrophilic polyoxyethylene group or a hydrophilic group such as <IMAGE> +TR <IMAGE> wherein M is hydrogen, an alkali metal, ammonium, or organic ammonium, and R3 is alkyl; A is an aliphatic, aromatic, or aliphatic-aromatic group. These surfactants can be used in hydrophilic colloid layers, which may form part of light-sensitive silver halide materials.</p> |
