Water-insoluble yellow terephthalate-azo-acetoacetylamido-benzimidazolone dyestuffs

Abstract

Water insoluble yellow monoazo dyestuffs of the general formula 1 ##STR1## in which R.sub.1 represents alkyl, cycloalkyl or aralkyl, X represents a carboxylic acid ester or a carboxylic acid amide, and Y.sub.1 and Y.sub.2 represent hydrogen, chlorine or bromine, alkyl or alkoxy, and method for their preparation. The dyestuffs are valuable pigments, which may be used for dyeing lacquers, lacquer forming agents, natural or synthetic resins and polymers and for printing textile fibrous materials or paper. They are distinguished by good rheological properties and they are fast to light, weather and migration. Moreover, they are resistant to heat and show color intensity and pure shades.

Dependencies are inferred from the claim text.