| abstract |
WHERE CF IS A FULLY FLUORINATED CARBON CHAIN AS DEFINED IN PARAGRAPH (1); CH IS THE SATURATED HYDROCARBON PORTION OF THE SAME CARBON CHAIN; X IS SO2 OR SO3; Z IS AN AMINO OR HYDROXYL GROUP, ALKALI METAL OR AN AMMONIUM GROUP; X=6 OR GREATER; Y=2 OR MORE. (CF)X(CH)Y(X)(Z) ACRYLIC POLYMER LAYERS AND COLLOIDAL SILVER HALIDE PHOTOGRAPHIC EMULSIONS ARE COATED TO FORM LAYERS WITHOUT REPELLENT SPOTS FROM SOLUTIONS CONTAINING A PERFLUORO COMPOUND CONTAINING AN INTRALINEAR CARBONYL OR SULFONYL GROUP SELECTED FROM THE GROUP: (1) PERFLUOROCARBON COMPOUNDS DERIVED FROM PERFLUOROCARBOXYLIC ACIDS HAVING THE GENERAL STRUCTURE CF-CO-X WHERE CF IS A FULLY FLUORINATED (PERFLUORO) SATURATED CHAIN CONSISTING OF FIVE OR MORE CARBON ATOMS WHICH MAY OR MAY NOT BE AN OXYGEN-INTERRUPTED CARBON CHAIN; X=OY OR AN AMINO GROUP, WHERE Y IS H, ALKALI METAL OR AMMONIUM GROUP, AND (2) PERFLUORO COMPOUNDS DERIVED FROM PERFLUOROSULFONIC AND PERFLUOROSULFURIC ACIDS HAVING THE GENERAL STRUCTURE |