Diazo dyes contg. a dioxanyl gp. - imparting red, blue etc. colours to synthetic fibres

摘要

New azo dispersion dyes are of formula (I). In (I) D is a diazo component of the type known in dispersion dyes; K is an opt. substd. 1,4-phenylene or 1,4-naphthylene gp.; R1 is H, 1-4C alkyl or 2-4C alkenylene, or, if K is 1,4-phenylene, R1 may also be 2-4C alkyl or 2-4C alkenyl which may be substd. by a gp. chosen from Cl, Br, OH, CN, 1-4C alkoxy, phenoxy, phenyl, formyloxy, 1-4C alkylcarbonyloxy, benzoyloxy, 1-4C alkoxycarbonyl, 1-4C alkoxycarbonyloxy, 1-4C alkyl or di-(1-4C alkyl)-aminocarbonyloxy gp., or a gp. (II); and R2 is 1-4C alkylene or 2-4C alkylene-O-2-4C alkylene gp. The molecule is free from sulphonic acid-, acetal-, -N (I) are useful red, brown, orange, violet and blue dyes with excellent fastness to light, moisture, heat fixing, sublimation pleating. They are esp. useful for dyeing and printing synthetic or semi-synthetic high molecular organic materials, esp. textiles of aromatic polyesters, cellulose 2 1/2- and 3-acetate, polyamides, etc.