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US 3,956,266 AGranted
Bis-(benzimidazolone-azo-acetoacetylamino)-phenylene pigments
AssigneeCiba-Geigy Corporation
InventorsRudolf Mory, Stefan Hari
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Abstract
New diazo pigments of the formula ##EQU1## wherein A denotes a phenylene or naphthylene radical and R denotes an aromatic radical containing a --CONH-- group bonded in a cyclic structure are prepared. The pigments are useful for coloring high-molecular organic materials such as polyamides, polyurethanes or polyesters. The pigments have good fastness to light, migration and weathering.
Claims1
A disazo pigment of the formula ##SPC11##
- wherein R.sub.1 is hydrogen, alkyl containing 1-4 carbon atoms, cycloalkyl containing 5-6 carbon atoms, phenyl, phenyl substituted by chloro, bromo, alkyl containing 1-4 carbon atoms, or alkoxy containing 1-4 carbon atoms;
- X.sub.1 is hydrogen, chloro, bromo, alkyl containing 1-4 carbon atoms, alkoxy containing 1-4 carbon atoms or phenoxy;
- and Y.sub.1 and Z.sub.1 are hydrogen, chloro, bromo, alkyl containing 1-4 carbon atoms, or alkoxy containing 1-4 carbon atoms.
Dependencies are inferred from the claim text.