Use of aluminum azo complex dyes as charge control agents

US6143455A · kind A · utility

Assignee

• Clariant Corporation · DE

Inventors

• Hans-Tobias Macholdt · Darmstadt, DE
• Ruediger Baur · Niedernhausen, DE

Key dates

• Filing date: Jul 16, 1999
• Grant date: Nov 7, 2000
• Expiry date: Jul 16, 2019

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2982
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Aluminum azo complex dyes of the formula (I) or (I') ##STR1## are used as charge control agents in electrophotographic toners and developers, powder coating materials, electret materials, color filters, electrostatic separation processes and in inkjet inks.