MONOAZO PIGMENTS AND THEIR USE IN COLOURING HIGH MOLECULAR-WEIGHT ORGANIC MATERIAL

摘要

Monoazo pigments of the formula I IMAGE (I) in which R is the radical of a carbocyclic or heterocyclic aromatic amine and R1, R2 and R3 are hydrogen, halogen, alkyl, alkoxy, alkoxycarbonyl, substituted or unsubstituted aminocarbonyl, nitro, cyano or trifluoromethyl. These pigments are suitable for coloring high molecular weight organic material and are distinguished by their easy accessibility and good general fastness properties and in particular by high clarity of color shade.