Water-soluble black trisazo dyestuffs
First Claim
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1. Water soluble black trisazo dyestuffs of the general formula I ##STR11## wherein R denotes hydrogen, alkyl having 1 or 2 carbon atoms, alkoxy having 1 or 2 carbon atoms, acylamino having 2 or 3 carbon atoms or carboxamide.
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Abstract
Water-soluble black trisazo dyestuffs of the general formula I ##STR1## wherein R denotes hydrogen, alkyl having 1 or 2 carbon atoms, alkoxy having 1 or 2 carbon atoms, acylamino having 2 or 3 carbon atoms or carboxamide and n denotes a number from 0 to 2.5 are suitable for the preparation of recording fluids.
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6 Claims
- 1. Water soluble black trisazo dyestuffs of the general formula I ##STR11## wherein R denotes hydrogen, alkyl having 1 or 2 carbon atoms, alkoxy having 1 or 2 carbon atoms, acylamino having 2 or 3 carbon atoms or carboxamide.
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3. Recording fluid containing 0.5 to 15% by weight of dyestuff of the general formula VII ##STR12## wherein R denotes hydrogen, alkyl having 1 or 2 carbon atoms, alkoxy having 1 or 2 carbon atoms, acylamino having 2 or 3 carbon atoms or carboxamide and n denotes a number from 0 to 2.5 and
0to 99% by weight of water and 0.5 to 99.5% by weight of a mixture of solvent and humectant.
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