Phthalimidyl azo dyes, process of their preparation and their use

摘要

The present invention relates to dyes of formula (I) wherein R is hydrogen or bromine, R₁ is hydrogen, methyl or -NHCO-C₁-C₄alkyl, R₂ is C₁-C₄alkyl substituted by C₁-C₄alkoxy and R₃ has, independently of R₂, any of the meanings of R₂, and to the process for the preparation thereof and to the use thereof in dyeing or printing semi-synthetic and especially synthetic hydrophobic fiber materials, especially textile materials.