Process for dyeing or printing aromatic polyamide fibres
AssigneeCiba-Geigy Corporation
InventorsCharles Soiron, Karlheinz Keller
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Abstract
A process for dyeing or printing aromatic polyamide fibres with cationic dyes in aqueous medium, wherein the medium contains A. a carrier which contains no ketone-forming carbonyl groups, and B. an anionic assistant. The process of the invention is especially suitable to obtain wilt cationic dyes dyeings having a color yield of 2 to 10 times greater than that obtained by using the same dye liquor but without the addition of any anionic assistant.
Claims15
In a process for dyeing or printing aromatic polyamide fibers with a dye liquor comprising a cationic dye, water, and a non-ketonic carrier in an amount of 5 to 30 grams per liter of dye liquor, the improvement which comprises further including in the dye liquor 0.1 to 5 g. per liter of an anionic assistant selected from the group consisting of a sulfonated fatty alcohol of 8 to 22 carbon atoms, a sulfonated alkylnaphthalene containing an alkyl group of 8 to 22 carbon atoms, a sulfosuccinic acid alkyl ester containing an alkyl group of 8 to 22 carbon atoms, a dodecyldiphenyl ether disulfonic acid, a sulfonated castor oil, and dinitrobenzenesulfonate, as the free acid or as the alkali metal, ammonium or amine salt.
A dye liquor or printing paste for dyeing or printing aromatic polyamide fibers comprising a cationic dye, water, non-ketonic carrier in an amount of 5 to 30 grams per liter and 0.1 to 5 grams per liter of an anionic assistant selected from the group consisting of sulfonated fatty alcohol of 8 to 22 carbon atoms, a sulfonated alkylnaphthalene containing an alkyl group of 8 to 22 carbon atoms, a dodecyl-diphenyl ether disulfonic acid, a sulfonated castor oil, and dinitrobenzenesulfonate, as the free acid or the alkali metal, ammonium or amine salt.
Dependencies are inferred from the claim text.