Process for coloring cellulose on polyester with water-insoluble red mono-azo dyes
OwnerUlrich Buhler, Manfred Hahnke +2inventors
InventorsUlrich Buhler, Manfred Hahnke, Michael Kunze, Albert Bode
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Abstract
Azo dyes of the formula ##STR1## wherein R.sup.1 is alkyl having 1 to 4 carbon atoms; R.sup.2 is alkyl having 1 to 3 carbon atoms; R.sup.3 is alkylcarbonyloxyethyl having 1 to 3 carbon atoms in the alkyl moiety, alkoxycarbonyloxyethyl having 1 to 4 carbon atoms in the alkoxy moiety, methoxyethoxycarbonyloxyethyl or ethoxyethoxycarbonyloxyethyl; and R.sup.4 is one of the definitions of R.sup.3 or cyanoethyl; or mixtures of at least two species of said formula are used for dyeing and printing hydrophobic fiber materials.
Claims1
A process for dyeing or printing high-molecular polyester by applying thereto one or more dyes of the formula ##STR15## wherein R.sup.1 is methyl;
- R.sup.2 is ethyl or n-propyl;
- R.sup.3 is methylcarbonyloxyethyl or ethylcarbonyloxyethyl;
- R.sup.4 is one of the definitions of R.sup.3.
Dependencies are inferred from the claim text.