Dicarboxylic acid ester diazo pigments
AssigneeCiba-Geigy Corporation
InventorsGeorg Cseh, Karl Ronco
Life of this patent
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Abstract
Diazo pigments of the formula ##STR1## wherein R denotes an alkyl, cycloalkyl, aralkyl, aryl or heterocyclic radical, X denotes a hydrogen or halogen atom, an alkyl or alkoxy group containing 1 to 4 carbon atoms, or a nitro, cyano, trifluoromethyl or carboxylic acid ester group, and Y denotes a hydrogen or halogen atom, an alkyl or alkoxy group containing 1 to 4 carbon atoms or a nitro, cyano, trifluoromethyl or carboxylic acid ester group, are useful for coloring plastics and printing inks in fast yellow to orange shades.
Claims7
A disazo pigment of the formula ##STR9## wherein R.sub.1 is alkyl containing 1 to 6 carbon atoms;
- alkyl containing 1 to 6 carbon atoms substituted with chloro, or alkoxy containing 1 to 4 carbon atoms;
- cycloalkyl containing 5 to 6 carbon atoms;
- phenalkyl having 1 to 2 carbon atoms in the alkyl radical;
- phenyl;
- or phenyl substituted by chloro, bromo, alkyl containing 1 to 4 carbon atoms, alkoxy containing 1 to 4 carbon atoms, methoxycarbonyl, ethoxycabonyl or akoanoylamino containing 1 to 4 carbon atoms;
- X.sub.1 is hydrogen;
- halogen;
- alkyl containing 1 to 4 carbon atoms;
- or alkoxy containing 1 to 4 carbon atoms;
- and Y.sub.1 is hydrogen;
- halogen;
- alkyl containing 1 to 4 carbon atoms;
- or alkoxy containing 1 to 4 carbon atoms.
Dependencies are inferred from the claim text.