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US 4,067,864 AGranted
Fiber-reactive 2-hydroxy-pyrid-6-on-(3)-yl azo dyestuffs
AssigneeCiba-Geigy Corporation
InventorsFritz Oesterlein, Gert Hegar, Karl Seitz
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Abstract
Azo dyestuffs which contain an acid substituent which confers solubility in water of the formula ##STR1## wherein D is the radical of a sulfo substituted benzene or naphthalene diazo component; R' is alkyl of 1 to 4 carbon atoms; Z is a fiber reactive group; and N is an integer of 1 to 4 are disclosed and are useful in dyeing nitrogen containing fibers such as polyamides, polyurethanes, silk, leather and wool as well as cellulose materials, in particular cotton.
Claims3
An azo dyestuff of the formula ##STR33## wherein D is the radical of a sulfo substituted benzene or napthalene diazo component;
- R' is alkyl of 1 to 4 carbon atoms;
- Z is a fiber reactive radical capable of reacting with the hydroxyl groups of cellulose or with the amino groups of polyamides;
- and
- n is an integer of 1 to 4.
1 more element
Dependencies are inferred from the claim text.