Azo pigment formulations

US4515639A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Peter Dopfer · Geltendorf, DE
• Johann Ostermeier · Hofheim, DE
• Siegfried Schwerin · Hofheim, DE

Key dates

• Filing date: Feb 5, 1982
• Grant date: May 7, 1985
• Expiry date: Feb 5, 2002

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B67/002
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Intense azo pigment formulations which have good flow and are readily dispersible are obtained on adding a long-chain aliphatic primary amine and a diamine of the formula EQU H.sub.2 N--A--NH.sub.2 in which A is an aliphatic hydrocarbon radical having 6 to 30 C atoms, before, during or preferably after the coupling. The formulations are in particular suitable for intaglio printing inks which produce glossy prints which do not even strike through thin papers.