Phthalimidyl-azo dyes, process for their preparation and their use

摘要

The present invention relates to dyes of formula (I) wherein R₁, is 2-methoxyethyl, 2-ethoxyethyl or 2-(2-ethoxyethoxy)ethyl, R₂ is C_1,-C₆alkyl which is unsubstituted or substituted by one or more hydroxy groups, halogen atoms, C_1,-C₄alkoxy groups, C₂-C₈alkoxyalkoxy groups, C_1,-C₄alkyl-COO- groups or C_1,-C₄alkyl-OCO- groups, R₃ is methyl, hydroxy, halogen, -NH-SO₂-R₅ or -NH-CO-R₆, wherein R₅ is methyl or ethyl and R₆ is methyl, ethyl, methoxymethyl or 2-methoxyethyl, and R₄ is ethyl or n-propyl, and also to a process for their preparation and to their use in the dyeing or printing of semi-synthetic and, especially, synthetic hydrophobic fibre materials, more especially textile materials.