Processes for dyeing and printing material made from nickel-containing polyolefines

摘要

Monoazo dyes employed to dye nickel-containing polyolefins have the formula wherein X is H, Halogen, alkyl or alkoxy, R is a benzene residue or alkyl which may bear a carbalkoxy, cyano or phenyl group, D is a grouping necessary to complete a 5- or 6-membered ring containing only C and N and = Y - is = N - or -C(OH)-NR1-,here R1 is H, alkyl or phenyl, are obtained from an o-mercapto-amino-benzene and a heterocyclic coupling component. A number of suitable componets are listed, the coupling components being imidazoles, benzimidazoles and pyrazolones. The coupling reaction may take place in a buffered aqueous medium or in an organic solvent. An Example (1) is given.ALSO:Fibrous materials of nickel-containing polyolefins are dyed or printed using water-insoluble dyes of the formula wherein A is a benzene residue containing an alkyl-, phenalkyl- or phenyl-mercapto group in o-position to the azo linkage and B is a heterocyclic residue bound through a C atom which is itself bound to a heterocyclic N atom or to an enolizable carbonyl group. Residue A may be substituted by halogen atoms, alkyl or alkoxy groups and the mercapto may be R-S- where R is a benzene or alkyl residue which may be substituted with carbalkoxy, cyano, phenyl or may be an alkyl of 1-10 C atoms or a halogen- or alkyl-substituted phenyl. The residue B may be a 1:3-imidazole, benzimidazole or pyrazolone-5 residue. The nickel may be in the form of a salt, e.g. a stearate, acetate or thiocarbamate. A number of suitable dyes and components therefor are specified and examples are given.