Process for conditioning isoindoline pigments

US4845214A · kind A · utility

Assignee

• BASF SE

Inventors

• Wolfgang Lotsch · Beindersheim, DE
• Reinhard Kemper · Heidelberg, DE

Key dates

• Filing date: Jul 7, 1986
• Grant date: Jul 4, 1989
• Expiry date: Jul 7, 2006

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B57/04
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Isoindoline pigments are conditioned by means of a heat treatment of the pigment in a mixture of water and benzenemonocarboxylic and/or benzenedicarboxylic acids. Well crystallized, very weatherfast pigmentary forms which give colorations possessing improved purity of shade are obtained.