Bis 1:2 chromium complexes of disazo and azo or azomethine dyes

US4652631A · kind A · utility

Assignee

• Ciba-Geigy · US

Inventors

• Fabio Beffa · Riehen, CH
• Ulrich Schlesinger · Binzen, DE

Key dates

• Filing date: Mar 28, 1985
• Grant date: Mar 24, 1987
• Expiry date: Mar 28, 2005

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B55/001
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

1:2 chromium complex dyes suitable for dyeing nitrogen-containing materials and materials which contain hydroxyl groups, are disclosed which, in the form of the free acid, have the formula ##STR1## wherein each of the symbols independently has the following meanings: Z is nitrogen or a --CH, PA0 A is a benzene or naphthalene radical which carries the hydroxyl or carboxy ortho to the azo or azomethine group, or, if n is 1 and Z is a --CH, is the radical of an aliphatic, cycloaliphatic or aromatic aminocarboxylic acid, PA0 B and D are each independently of the other the radical of a coupling component which couples in the alpha- or o-position relative to X if Z is nitrogen, or the radical of an o-hydroxyaldehyde if Z is --CH, PA0 X is oxygen or --NR, wherein R is hydrogen or C.sub.1 -C.sub.4 alkyl, with the proviso that X must be oxygen if Z is --CH, PA0 Y is a bridge member of the formula --SO.sub.2 or --SO.sub.2 --NR--SO.sub.2 --, wherein R is hydrogen or C.sub.1 -C.sub.4 alkyl, PA0 n is 0 or 1, and PA0 p is an integer from 0 to 6.