Water soluble monoazo dyes for polyamide material

摘要

A series of water soluble azo dyes for dyeing polyamide fiber material are provided by coupling an appropriate diazotized aminobenzene into an appropriately substituted N-alkyl-N-benzoxyethylarylamine. The dyes are characterized by the presence of one sulfonic acid group, either as the free acid or in salt form, and by the presence of a benzoate ester group. When dyed from an appropriate dye bath, these dyes produce dyeings on polyamide fiber material characterized by outstanding lightfastness and excellent transfer properties.