Electrostatic toners with polyamine charge stabilizers

US5491043A · kind A · utility

Assignee

• BASF SE

Inventors

• Johannes P. Dix · Schifferstadt, DE
• Ulf Baus · Dossenheim, DE
• Karin H. Beck · Ludwigshafen, DE
• Friedrich-Wilhelm Raulfs · Ludwigshafen, DE

Key dates

• Filing date: May 18, 1994
• Grant date: Feb 13, 1996
• Expiry date: May 18, 2014

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S430/105
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

An electrostatic toner contains a polymeric binder and as a charge stabilizer a polyamine whose average molecular weight is from 150 to 15,000 and wherein the nitrogen atoms are separated from each other by C.sub.1 -C.sub.13 - alkylene, which may be phenyl-substituted, or by phenylene, which may be C.sub.1 -C.sub.4 -alkyl-substituted, and are substituted by C.sub.1 -C.sub.13 -alkyl, which may be phenyl-, hydroxyl- or carboxyl-substituted, phenyl, C.sub.1 -C.sub.10 -alkanoyl, benzoyl, C.sub.1 - C.sub.6 - alkylcarbamoyl, phenylcarbamoyl or a radical of the formula CO-L-CO, where L is C.sub.2 -C.sub.8 -alkylene, the last case resulting in the crosslinking of two polyamine units.