Monoazo or disazo pigments based on (benoxazol-2-yl)- or (benzimidazol-2-yl)-arylacetamides

US5493011A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Rudiger Jung · Kelkheim, DE
• Reinhold Deubel · Bad Soden am Taunus, DE

Key dates

• Filing date: Nov 6, 1992
• Grant date: Feb 20, 1996
• Expiry date: Nov 6, 2012

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D21H21/285
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Water-insoluble azo colorants, their preparation and use The invention relates to monoazo and disazo compounds of the formula (I) ##STR1## in which D is the radical of a carbocyclic or heterocyclic diazo or bisdiazo component, R.sup.1 and R.sup.2, independently of one another, are each a substituted or unsubstituted aryl or heteroaryl radical, X.sup.1 and X.sup.2, independently of one another, are each ring-forming ether oxygen or a substituted or unsubstituted imide grouping and n has the value 0 or 1, in which rings A and B, independently of one another, can each be additionally substituted and/or carry substituted or unsubstituted fused rings. These new compounds of the formula (I) are obtained by coupling diazotized amines or diamines of the type D--NH.sub.2 or H.sub.2 N--D--NH.sub.2 with (benzoxazol-2-yl)- or (benzimidazol-2-yl)-arylacetamides. Depending on the presence and length of alkyl chains, the compounds of the formula (I) are suitable for use as pigments, disperse dyes or oil-soluble dyes.