Abstract: Perfluoro(cycloaliphatic methyleneoxyalkylene) compositions are provided. These compositions comprise perfluoro(cycloaliphatic methyleneoxyalkylene) carbonyl fluoride compounds having (a) a perfluorocycloaliphatic moiety which can have up to two perfluoroalkyl substituents and a perfluoroalkylene substituent, and (b) a perfluoromethyleneoxyalkylene carbonyl fluoride radical, the methylene group of the radical being bonded to a ring carbon atom or the perfluoroalkylene substituent of the moiety and the alkylene group of the perfluoromethyleneoxyalkylene carbonyl fluoride being a perfluoro(methyl)methylene group, a perfluoroisopropyleneoxy(methyl)methylene group, or a poly(perfluoroisopropyleneoxy)perfluoro(methyl)methylene group having up to about 10 perfluoroisopropyleneoxy units.

Abstract: A treated fibrous polyamide substrate having resistance to staining by acid colorants is provided. The treated substrate comprises a fibrous polyamide substrate having applied thereto (a) a partially sulfonated novolak resin and (b) polymethacrylic acid, copolymers of methacrylic acid, or combinations of said polymethacrylic acid and said copolymers of methacrylic acid.