Toner containing pigment and surface modified pyrogenically produced aluminum oxide

US5501933A · kind A · utility

Assignee

• Degussa AG · DE

Inventors

• Hans Deusser · Karlstein, DE
• Dieter Kerner · Midland Park, US
• Ju/ rgen Meyer · Riedstadt, DE
• Gu/ nther Michael · Karlstein, DE
• Andreas Stubbe · Rodenbach, DE

Key dates

• Filing date: May 19, 1994
• Grant date: Mar 26, 1996
• Expiry date: May 19, 2014

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31663
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Disclosed is an electrophotographic toner comprising a resin, a pigment, and surface-modified, pyrogenically produced aluminum oxide which is has the following physico-chemical properties: ______________________________________ Surface (m.sup.2 /g) 50 to 100 Stamping density (g/l) 50 to 90 Drying loss (%) <5 Annealing loss (%) 5.0 to 15 C content (%) 0.5 to 12 pH 4 to 8. ______________________________________