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US 4,121,898 AGranted
Process for dyeing synthetic polyamide fibre materials
AssigneeBayer Aktiengesellschaft
InventorsHelmut Kirschnek, Karlhans Jakobs
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AssigneeBayer Aktiengesellschaft
InventorsHelmut Kirschnek, Karlhans Jakobs
Estimating the term…
In a process for dyeing synthetic polyamide fibre materials with metal-free acid dyestuffs a dye liquor is used which contains compounds of the formula ##STR1## wherein R.sub.1 represents an alkyl and/or alkenyl radical with 12-22 carbon atoms, R.sub.2 represents hydrogen and/or methyl, m represents 0 or 1, n represents 2 or 3 and The sum of x + y + z represents a number from 10-30, and compounds of the formula R.sub.3 -- B -- X wherein R.sub.3 represents an alkyl radical with 12-22 carbon atoms and/or a phenyl or/and naphthyl radical which contains a total of 12-22 carbon atoms and is substituted by one or more alkyl radicals, B represents --O--SO.sub.2 -- and/or --SO.sub.3 and X represents hydrogen or an ammonium, alkali metal, alkaline earth metal, mono-, di- or tri-alkyl-ammonium or hydroxyalkylammonium ion with, in each case, 1-4 carbon atoms in the alkyl radical, or represents a cyclohexyl-ammonium ion.
Process for producing uniform, level dyeings of increased fastness and reduced drain effect in the dyeing of synthetic polyamide fibre materials with two or more metal-free acid dyestuffs which have different rates of absorption into said polyamide fiber material comprising dyeing said polyamide materials in an aqueous dye liquor consisting essentially of water, said metal-free acid dyestuffs, a cationic compound of the formula:
Dependencies are inferred from the claim text.