Water-soluble polyazo dyestuffs
AssigneeHoechst Aktiengesellschaft
InventorsWolfgang Bauer, Dieter Baumgart, Walter Zoller
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Abstract
The present invention relates to water-soluble polyazo dyestuffs of the general formula I ##STR1## wherein Y, Z, m and M.sup..sym.1 to M.sup..sym.4 are as defined in claim 1, processes for dyeing leather and paper with the polyazo dyestuffs, and recording liquids and inks containing the polyazo dyestuffs.
Claims14
Water-soluble polyazo dyestuffs of the formula I ##STR40## wherein Y is the group ##STR41## Z is ##STR42## R.sup.1 is hydrogen, (C.sub.1 -C.sub.4)-alkyl or halogen;
- R.sup.2 is hydrogen or (C.sub.1 -C.sub.4)-alkyl;
- M.sup..sym.1 to M.sup..sym.7 independently of one another are a cation;
- m, o and p independently of one another are 0 or 1;
- and
- n is 1 or 2.
A recording liquid comprising about 0.5 to about 15% by weight of dyestuff of the formula I ##STR48## wherein Y is ##STR49## Z is ##STR50## M.sup..sym.1 to M.sup..sym.7 independently of one another are a cation;
- m, o and p independently of one another are 0 or 1;
- and
- n is 1 or 2;
- 0to about 99% by weight of water and about 0.5 to about 99.5% by weight of solvent, humectant or mixtures thereof.
Dependencies are inferred from the claim text.