GB953710A - New metallised monoazo dyestuffs containing triazinylamino groups - Google Patents

Abstract

The invention comprises the chromium and/or cobalt complex azo compounds which contain 1 atom of chromium or cobalt in complex combination with 2 molecules of a monoazo compound of formula <FORM:0953710/C3/1> wherein A is a benzene nucleus having the hydroxyl group in the ortho-position to the azo group and also containing a single nitro group and a single sulphonic acid group and which may be further substituted, for example by chlorine or methyl, B is a naphthalene nucleus having the hydroxyl group in the 1-position, the azo group in the 2-position, the -NR group in one of the positions 5, 6, 7 or 8 and having 1 or 2 sulphonic acid groups, R is a hydrogen atom or an alkyl group having up to 4 carbon atoms, m is 0 or 1 and Z is a 1,3,5-triazine radical containing one or two labile atoms or groups. Labile atoms or groups are those which are bound by a covalent bond to a carbon atom of the triazine nucleus but which readily dissociate under the influence of heat or alkalis, especially in the presence of moisture, to form an ion or an uncharged molecule. The dyes are prepared by reacting 2 moles of a halotriazine with 1 mole of a 1 : 2-chromium or -cobalt complex of an appropriate aminoazo dye. Any halogen atoms linked to the triazine residue of the resultant product may be replaced by reaction with, for example, ammonia, amines, alcohols, phenols, potassium thiocyanate or mercapto compounds. The dyes may be used in dyeing and printing of wool, polyamides and polyurethanes and, in particular, cellulose textile materials in the presence of an acid-binding agent, in red, green, brown, blue and black shades. Many examples and suitable components are specified. Specifications 797,946, 847,635 and 870,985 are referred to.