GB786928A - Improvements in or relating to 1,2 cobalt-complexes of monoazo-dyestuffs - Google Patents

Abstract

The invention comprises dyestuffs of formula <FORM:0786928/IV (b)/1> where v is H or Me, w is H, Cl, Me or NO2 and R is 31-methoxy- or 21-hydroxy-propyl, the NV group is in the 1 or 2 position of the naphthalene nucleus and o to the azo group, the SO2NHR group is in the 4, 5 or 6 position and A is A1, a compound of the same formula as A1, the residue of the dyestuff a 2-aminophenol-sulphonamide-\sY2 - (31 - chloro) - phenylnaphthylamine or the residue of a compound of formula <FORM:0786928/IV (b)/2> where X is OH or MeO, y is H, Me or CH3CONH, z is an alkyl group of up to 4 C atoms or the residue of an aliphatic, cycloaliphatic, araliphatic, aromatic or heterocyclic primary or secondary amine which may contain hydroxy, methoxy, ethoxy or methyl groups, R1 is an alkyl radicle of 6-18 C atoms and R2 is an alkyl or aryl radicle. They are made by treating appropriate dyestuffs or dyestuff mixtures with cobalt-yielding agents so that the final product contains approximately 2 mols. of dyestuff per atom of metal. Cobalting may be effected in conventional fashion, preferably with the use of cobaltous acetate, formate or sulphate in aqueous or organic media and especially in an aqueous caustic alkaline medium in the presence of compounds such as tartaric, citric or lactic acids. The dyestuffs dye wool, silk, leather and especially polyamide fibres from neutral to weakly acid baths in blue, green and olive shades. In examples illustrating the preparation of the dyestuffs and their use in dyeing processes the diazo components used are 4- and 5-nitro-, 4-chloro-, 5- and 6-nitro, 4-nitro-6-methyl-, 4,6-dinitro-2-aminophenols, 2-aminophenol-4- and -5-sulphonamides, -4-sulphonmethylamide, -(21-hydroxy, -methoxy and ethoxy) - ethylamides, -(21-hydroxy and 31-methoxy) - propylamides, - di - (21 - hydroxy-ethyl)amide, -cyclohexylamide, -benzylamide, -phenylamide, -(41-methyl)-phenylamide, -pyrrolidide and -morpholide, 2-aminophenol-6-methyl- and -acetylamino-4-sulphonamides, 2-amino - 1 - methoxybenzene - 4 - sulphonamide and 2 - amino - 1 - hydroxy - 4 - methyl - and -ethylsulphonylbenzenes, the coupling components being 2-naphthylamine-5 and 6-sulphon - (21 - hydroxy) - and - 6 - sulphon - (31-methoxy) - propylamides, 1 - naphthylamine-4- and -5-sulphon-(21-hydroxy and -methoxy)-propylamides and 2-methylaminophthalene-6-sulphon-(21-hydroxy and 31-methoxy)-propylamides, 2 - (31 - chloro) - phenylnaphthylamine, 1 - acetoacetylamino - 2 - ethylhexane, -octane, -hexane, -dodecane, -octadecane and -1,1-dimethyl -3,3 - dimethyl - butane and 1 - benzoylacetylaminooctane. Reference has been directed by the Comptroller to Specification 755,113.