Black dye mixtures of fiber-reactive azo dyes and use thereof for dyeing hydroxy- and/or carboxamido-containing fiber material
AssigneeHoechst Aktiengesellschaft
InventorsKurt Hussong, Werner H. Russ, Karl Krieger
Life of this patent
Estimating the term…
Abstract
The disclosed black dye mixtures contain 50 to 95% by weight of one or more disazo dyes of the formula (1) and 5 to 50% by weight of one or more monoazo dyes of the formula (2) ##STR1## where R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6, identical to or different from each other, are each hydrogen, methyl, ethyl, methoxy, ethoxy, sulfo or carboxy, Y is in each instance independently of the others vinyl, .beta.-chloroethyl, .beta.thiosulfatoethyl or .beta.-sulfatoethyl, and M is hydrogen or an alkali metal.
Claims10
A dye mixture for preparing black dyeings comprising one or more disazo dyes conforming to the formula ( 1) and one or more monoazo dyes conforming to the formula (2) ##STR15## where R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6, identical to or different from each other, are each hydrogen, methyl, ethyl, methoxy, ethoxy, sulfo or carboxy,
- Y is in each instance independently of the others vinyl, .beta.-chloroethyl, .beta.-thiosulfatoethyl or .beta.-sulfatoethyl, and
- M is hydrogen or an alkali metal, said mixture comprising an amount of from 50 to 95% by weight in respect of the disazo dye(s) of the formula (1) and of from 5 to 50% by weight in respect of the dye(s) of the formula (2).
A method for modifying the color of a dye which produces navy dyeings by formulating a dye mixture, said method comprising:
- selecting as the navy-dyeing dye a compound of the formula (1) ##STR18## and modifying the coloristic properties of the navy-dyeing dye to obtain a black-dyeing dye mixture by mixing 50 to 95% by weight, of the resulting dye mixture, of a said compound of the formula (1) with 5 to 50% by weight, of the resulting dye mixture, of a compound of the formula (2) ##STR19## where R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6, identical to or different from each other, are each hydrogen, methyl, ethyl, methoxy, ethoxy, sulfo or carboxy,
- Y is in each instance independently of the others vinyl, .beta.-chloroethyl, .beta.-thiosulfatoethyl or .beta.-sulfatoethyl, and
- M is hydrogen or an alkali metal.
Dependencies are inferred from the claim text.