Verfahren zum unregelmaessigen Faerben von Cellulosefasern

摘要

1368128 Dyeing wound packages of cellulose fibres FARBWERKE HOECHST AG 19 Nov 1971 [20 Nov 1970] 53834/71 Heading D1B Slivers and yarns of cellulose fibres are dyed in the form of a wound package by impregnating the package with an aqueous alkaline liquor containing an azo coupling component followed by injecting one or more weakly acidic aqueous solutions each containing a mixture of one or more reactive dyes and one or more diazonium compounds derived, from an aromatic amine, the package then being allowed to dwell at a temperature from room-temperature to 60‹C to fix the dyes. Reactive dyes containing vinylsulphonyl groups are preferred, the impregnation may be at 20 to 70‹C and preferred coupling components are arylamides of aromatic or heterocyclic 0-hydroxy-carboxylic acid or of an acylacetic acid or an aromatic or heterocyclic hydroxy compound or a compound containing an enoligable for enolized ketomethylene group in a heterocyclic ring.