Dye mixtures
AssigneeCiba-Geigy Corporation
InventorsHelga Kaiser, Hans-Jorg Angliker, Peter E. Eugster
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Abstract
Mixtures comprising 75 to 99% by weight of a dye of formula ##STR1## wherein X is hydrogen, chlorine, bromine or methyl, and KK is the radical of a coupling component that does not contain water solubilizing groups, and 1 to 25% by weight of a dye of formula ##STR2## wherein X and KK have the given meanings and Y is chlorine or bromine, are suitable for dyeing polyester materials.
Claims20
A mixture comprising 75 to 99% by weight of a dye of formula ##STR19## wherein X is hydrogen, chlorine, bromine or methyl, and
- KK is the radical of a coupling component that does not contain water solubilising groups,
- and 1 to 25% by weight of a dye of formula ##STR20## wherein X and KK have the given meanings and Y is chlorine or bromine
A process for the preparation of a mixture comprising 75 to 99% by weight of a dye of formula ##STR23## wherein X is hydrogen, chlorine, bromine or methyl, and
- KK is the radical of a coupling component that does not contain water solubilising groups,
- and 1 to 25% by weight of a dye of formula ##STR24## wherein X and KK have the given meanings and Y is chlorine or bromine, which process comprises diazotising an amine of formula ##STR25## in an aqueous hydrohalic acid of formula HY, then, after addition of further hydrohalic acid HY, carrying out an aftertreatment at 20.degree. to 50.degree. C. for 0.5 to 10 hours, and finally coupling the solution of the diazonium salt to a coupling component H-KK.
Dependencies are inferred from the claim text.