Ciba-Geigy Corporation

Ciba-Geigy Ag

Karl Ronco

Armand Roueche

Rolf Muller

Paul Muller

Stefan Hari

Georg Cseh

The invention relates to disazo pigments of the formula ##STR1## wherein R is an ethyl, propyl or isopropyl radical. These pigments colour plastics, especially rigid PVC, in brown shades of excellent fastness properties.

(2,5-diisopropoxycarbonylbenzene-azo-2-hydroxy-3-carbamoyl naphthalene)

The present invention concerns the disazo pigment of the formula ##STR1## The new pigment is useful for coloring plastic material in pure red shades of high tinctorial strength and outstanding fastness to light and migration.

Disazo pigment from condensation of carboxylic acid chloride with

The instant invention relates to monoazo pigments containing a hydroxynaphthoylaminobenzimidazolone radical which correspond to the formula ##STR1## said new pigments being useful for coloring high molecular materials in orange to brown shades of especially good fastness properties.

Monoazo pigments containing hydroxynaphthoylamino benzimidazolone radical

The instant invention relates to monoazo pigments containing a hydroxynaphthoylaminobenzimidazolone radical of the following formula ##STR1## These pigments are useful for coloring high molecular weight materials in orange to brown shades of especially good fastness properties.

Monazo pigments containing hydroxynaphthoylaminobenzimidazalone radical

Disazo pigments of the formula ##STR1## WHEREIN X and Y denote hydrogen or halogen atoms, alkyl or alkoxy groups containing 1-6 carbon atoms, or aryloxy, trifluoromethyl, nitro, cyano or carboxylic acid ester groups, or wherein X and Y conjointly denote a fused benzene ring are useful for coloring plastics, lacquers and printing inks in yellow shades.

Aromatic disazo pigments

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.

Dicarboxylic acid ester diazo pigments

Disazo pigments of the formula ##STR1## wherein R represents alkyl containing 1 to 6 carbon atoms, cyclohexyl or phenyl, and X and Y represent hydrogen, halogen, alkyl or alkoxy groups containing 1 to 4 carbon atoms which are useful for pigmenting high molecular organic material.

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Riehen, Switzerland

Karl Ronco