Water-insoluble azo colorants having two azo groups and a 1,4-bis (acetoacetylamino) benzene coupling component

US5428136A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Rudiger Jung · Kelkheim, DE
• Joachim Weide · Kelkheim, DE
• Hans Joachim Metz · Darmstadt, DE

Key dates

• Filing date: Jul 29, 1993
• Grant date: Jun 27, 1995
• Expiry date: Jul 29, 2013

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S534/04
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Disazo compounds of the formula (I) ##STR1## in which R.sup.1 and R.sup.2 are identical or different and are a hydrogen or halogen atom or a C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.5 -alkoxycarbonyl, nitro, cyano or trifluoromethyl group and the rings A, B, C and D independently of one another are unsubstituted or contain one or more substituents from the group comprising C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, carboxyl, C.sub.1 -C.sub.5 -carbalkoxy, C.sub.2 -C.sub.5 -alkanoyl, benzoyl, acyloxy, acylamino, unsubstituted or N-mono- or N,N-disubstituted carbamoyl or unsubstituted or N-mono- or N,N-disubstituted sulfamoyl, possible substituents being C.sub.1 -C.sub.4 -alkyl or mono- to trisubstituted phenyl; C.sub.1 -C.sub.4 -alkylamino or phenylamino; C.sub.1 -C.sub.4 -alkylsulfonyl or phenylsulfonyl; phenylsulfonylamino; cyano; halogen, nitro and trifluoromethyl, are suitable for coloring naturally occurring and synthetic materials, for formulating enamels, emulsion paints and printing inks, for spin coloring artificial silk and for coloring paper.