PHTHALIMIDYL AZO DYES, PROCESS FOR THEIR PREPARATION AND THE USE THEREOF

摘要

The present invention relates to dyes of formula wherein R1 is hydrogen, methyl or -BHCO-C1-C4alkyl, R2 is C1-C4alkyl, it being possible for the alkyl chain, from C2 upwards, optionally to be interrupted by an oxygen atom, 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 fibre materials, especially textile materials.