Orange-navy blue azo dyes - used for polyester(s), also for cellulose acetate and polyamide

摘要

Azo dyes are of formula (I): are new: In (I) D is residue of a diazo component; R is H or opt. substd. aliphatic, cycloaliphatic, araliphatic or aromatic gp. or the gp. A' -X-CO-Y-A2-Z;R'=H, Me, Et, MeO or EtO; R2=H, Cl, Br, Me, Et, MeO, EtO, 1-4C aekanoylamino, benzoylamino, or 1-4C alkoxycarbonylamine; A'=2-4C alkylene; A2=1-4C alkylene; X= a direct bond, -O- or -NH-Z is heterocyclo e.g. (where B=H or Cl and n=0,1,2,3 or 4). Used as orange-red-violet-navy blue dyes for synthetic and semi-synthetic fibres, esp. polyesters, but also cellulose acetates and polyamides, having good fastness to light, wetting and heat-fixing.