Monoazo dispersion dyes from acyl dihydroxy benzene cpds., - for use on metal-modified polyolefin fibres

摘要

New acyl dihydroxybenzene azo dyes are of formula (I): In the formula, A is phenyl with =3 substits. or naphthyl with =2 substits. consisting of 1-4C alkyl or alkoxy, CF3, CN, NO2, Cl or Br, or A of formula (II) or (III). R6 and R7 are H, CN, NO2, Cl, Br, lower alkyl or alkyl sulphonyl, CF3, COOR' or phenyl. R' is lower alkyl. R8 and R9 is H, lower alkyl or alkoxy, Cl, Br, NO2, sulphonyl, N,N-dialkyl sulphonyl, CN or lower alkyl sulphonyl. R is 1-4C alkyl, benzyl or phenyl, with =2 1-4C alkyl or alkoxy, Cl or Br. (I) are used as dispersion dyes for metal-modified polyolefin fibres, esp. Ni-contg. polypropylene fibres in carpet form, in yellow-orange to brown shades. Strong, brilliant shades are obtained with very good fastness to light and abrasion and resistance to solvents, gas and heat.