Anthraquinone azopyrazalone colorants

US4563519A · kind A · utility

Assignee

• BASF SE

Inventors

• Peter Dimroth · Ludwigshafen, DE
• Heinrich Kowarsch · Oberderdingen, DE

Key dates

• Filing date: Aug 12, 1983
• Grant date: Jan 7, 1986
• Expiry date: Aug 12, 2003

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B33/12
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Compounds which, in one of the possible tautomeric forms, correspond to the general formula I ##STR1## where n is 1 or 2 and, if n is 1, R is unsubstituted or substituted aryl or heteroaryl or, if n is 2, R is a bridge member, and the rings A and B can be further substituted, are outstanding colorants for surface coatings, printing inks or plastics.