Metal complex dyes of trisazo compounds having a 3,5-dinitro-2-hydroxyphenylazo group and two other arylazo groups bound to a 1-amino-3-hydroxy-1,3-diamino- or 1,3-dihydroxy-benzene nucleus

US4263229A · kind A · utility

Inventors

• Martin Studer · Basel, CH
• Heinz Wicki · Basel, CH

Key dates

• Filing date: Dec 9, 1974
• Grant date: Apr 21, 1981
• Expiry date: Dec 9, 1994

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B45/24
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Compounds of the formula ##STR1## homogeneous and heterogeneous metal complexes thereof, and mixtures of said compounds and complexes, wherein PA1 each A is independently hydroxy or amino, PA1 T is carboxy or sulpho, PA1 T.sub.1 is hydrogen, nitro, halo, alkyl, substituted alkyl, alkoxy, substituted alkoxy or sulpho, PA1 T.sub.2 is hydrogen, nitro, halo, alkyl, substituted alkyl, alkoxy or substituted alkoxy, PA1 X is hydrogen, hydroxy, halo, nitro, alkyl, substituted alkyl, alkoxy, substituted alkoxy or sulpho, and PA1 Y is hydrogen, hydroxy, halo, nitro, alkyl, substituted alkyl, alkoxy, substituted alkoxy or ##STR2## wherein with the proviso that Y is-- ##STR3## when X is other than sulpho, Z is hydrogen, carboxy or a sulpho, PA1 Z.sub.1 is hydrogen, hydroxy, nitro, alkyl, substituted alkyl, alkoxy, or substituted alkoxy, and PA1 Z.sub.2 is hydrogen or nitro. These dyes are useful for dyeing leather. The dyes display excellent levelling properties, build up well, are soluble in water and are resistant to migration in polyvinyl chloride and crude rubber. The dyeings exhibit good fastness to buffing, light, wet treatments and pressing.