Patent ID: 6106580
Filing Date: 2000-08-22
Classification: C09B,D06P,Y10S

Abstract:
A dye mixture comprising one or more disazo dyes conforming to the general formula ( 1), one or more monoazo dyes conforming to the general formula (2) and optionally one or two monoazo dyes conforming to the general formula (3) ##STR11## wherein: R.sup.1 is hydrogen, methyl, ethyl, methoxy, ethoxy, hydroxy, sulfo or carboxy;R.sup.2 is hydrogen, methyl, ethyl, methoxy, ethoxy, sulfo or carboxy;R.sup.3 is hydrogen, methyl, ethyl, methoxy, ethoxy, hydroxy, sulfo or carboxy;R.sup.4 is hydrogen, methyl, ethyl, methoxy, ethoxy, sulfo or carboxy;R.sup.5 is hydrogen, methyl, ethyl, methoxy, ethoxy, hydroxy, sulfo or carboxy;R.sup.6 is hydrogen, methyl, ethyl, methoxy, ethoxy, sulfo or carboxy;Y is in each instance, independently of the others, vinyl or is ethyl which is substituted in the .beta.-position by a substituent which is eliminated by the action of an alkali, forming the vinyl group;M is hydrogen or an alkali metal;m is the number 1 or 2;the dye, respectively dyes, of the general formula (1) or of the general formulae (1) and (3) being present in the mixture in an amount of from 50 to 95% by weight, and the dye, respectively dyes, of the general formula (2) being present in the dye mixture in an amount of from 5 to 50% by weight, while the dyes of the formulae (1) and (3), if a dye or dyes of the general formula (3) being present in the dye mixture, are present in relation to one another of 99.5% to 94% in respect of the disazo dye(s) of formula (1) and of 0.5 to 6% by weight in respect of the monoazo dye(s) of formula (3), calculated on the total amount of the dyes of formulae (1) and (3).