Azo dye mixtures, azo dyes, processes for their preparation, and their use

摘要

Dye mixtures comprising at least one dye of the formula (1) together with at least one dye of the formula (2) or (3) in which the substituents are as defined in claim 1 are direct dyes for cellulosic fibre materials in particular. They are stable at high temperatures and are particularly suitable for the one-bath, single-stage dyeing of polyester/cotton blends with a disperse dye for the polyester fibres under the dyeing conditions for polyester fibres.