Preparation of azo colorants in microreactors and their use in electrophotographic toners and developers, powder coatings, ink jet inks and electronic medias

US7135266B2 · kind B2 · utility

Assignee

• Clariant Finance (BVI) Limited · VG

Inventors

• Ruediger Baur · Niedernhausen, DE
• Hans-Tobias Macholdt · Darmstadt, DE
• Uwe Nickel · Bad Homburg vor der Höhe, DE
• Leonhard Unverdorben · Uttenreuth, DE
• Christian Wille · Weinheim, DE

Key dates

• Filing date: Sep 10, 2002
• Grant date: Nov 14, 2006
• Expiry date: Nov 23, 2022

Classification

• Technology area (CPC G): Physics
• CPC primary: G03G9/091
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention is directed to an electrophotographic toner or developer, powder coating, ink jet ink or an electronic media having an azo colorant prepared by conducting the diazotization of aromatic or hetaromatic amines or the azo coupling reaction or the diazotization and the azo coupling reaction in a microreactor.