Unsymmetrical azo - azo methine 1:2 chromium complex dyes

US4116952A · kind A · utility

Assignee

• Ciba-Geigy · US

Inventors

• Fabio Beffa · Riehen, CH
• Gerhard Back · Lörrach, DE
• Eginhard Steiner · Füllinsdorf, CH

Key dates

• Filing date: Apr 18, 1977
• Grant date: Sep 26, 1978
• Expiry date: Apr 18, 1997

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D06P1/13
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

1:2 Chromium complex dyes which contain one molecule of an azo or azomethine compound of the formula ##STR1## and one molecule of the azomethine compound of the formula ##STR2## COMPLEXED TO A CHROMIUM ATOM, IN WHICH FORMULAE A represents the radical of a diazo component of the benzene or naphthalene series, which carries the complex-forming group XH in ortho-position to the azo group, PA1 B represents the radical of a coupling component which couples in ortho-position to HX' or the radical of an aromatic o-hydroxyaldehyde, PA1 Z represents a nitrogen atom or the -CH group, PA1 X represents an oxygen atom or a -CO-O group, PA1 X' represents an oxygen atom, a NH group, a low molecular N-alkyl, N-aralkyl or N-aryl group, and PA1 R represents a substituted or unsubstituted aliphatic or cycloaliphatic radical, PA1 And the benzene ring a can carry a further fused benzene ring or can be substituted by halogen, nitro, alkyl and alkoxy, in particular by low molecular alkyl and alkoxy, and these compounds contain together 0 to 5 water-solubilizing groups and optionally a group of the formula EQU --N.dbd.N--Ar--N.dbd.N--Ar' (3) and/or one to two groups of the formula EQU --N.dbd.N--Ar" (4) w…