| abstract |
A reactive metal formazan blue dye represented by a free acid of the formula,n wherein A 1 and A 2 are independently a substituted or unsubstituted phenylene or naphthylene group, B is a straight or branched alkyl or alkenyl group, a phenyl group, a naphthyl group or a heterocyclic group, the alkyl, alkenyl, phenyl, napthyl and heterocyclic group being substituted or unsubstituted, Me is an ion of metal identified by an atomic number of 27 to 29, X is -O- orn Y is a halogen atom, Z is a group capable of imparting water solubility, each of I, m and n is 0 or an integer of 1 to 3, provided that the sum of I, m and n is from 1 to 4, D is a substituted or unsubstituted phenylene or naphthylene group, R is a substituted or unsubstituted lower alkyl group, and Q is -S0 2 CH = CH 2 or -S0 2 CH 2 CH 2 L in which L is a group capable of being spitted by the action of alkali. Process for his preparation and his use for dyeing hydroxy- or amido-containing fiber materials. |