Process for dyeing and printing

Claim 1

A process for dyeing and printing leather, cotton or wool material, comprising the step of applying to leather, cotton or wool material a diazonium salt and a coupling component which react on the material to produce a diazo dyestuff, wherein the coupling component is selected from the group consisting of: ##STR39## wherein R 1 is hydrogen, an alkyl group, an acylaminoalkyl group, an aralkyl group, an aryl radical, a heterocyclic radical, an alkylene radical which links the radical of the elected formula with a further similar heterocyclic radical, or an amino group; R 2 is hydrogen, an alkyl group, cyclohexyl, cyano nitro, nitroso, H 2 N--, acylamino group, an alkylcarbonyl or arylcarbonyl group, a sulphonyl group, an aminosulphonyl group, an alkoxycarbonyl or aryloxycarbonyl radical, an aminocarbonyl group, a halogen atom, a sulphoalkyl group, a haloalkanoylaminomethyl group, a quaternary ammoniumalkanoylaminomethyl group, a sulfoalkanoylaminomethyl group, a phthalimidomethyl group, an o-benzene disulfonimidomethyl group, a sulfonic acid group, a carboxyl group, a quaternized amino group, a pyridinium group or a benzimidazolium group; R 3 is hydrogen, an alkyl group, an aralkyl radical, an aryl radical, a heterocyclic radical, the cyano group, an alkoxycarbonyl or aryloxycarbonyl radical, an aminocarbonyl group, an alkoxycarbonylmethyl or aryloxycarbonylmethyl radical, the cyanomethyl group, an acylmethyl group, an aminocarbonylmethyl group, the carboxy group or the hydroxymethyl group; n is 2 or 3; wherein one of R 1 and R 2 is a fiber-reactive group provided that every selected coupling component has one fiber-reactive group.