Stable charge transport layer dispersion containing polytetrafluoroethylene particles and hydrophobic silica

US6326111A · kind A · utility

Assignee

• Xerox Corporation · US

Inventors

• John S. Chambers · Rochester, US
• Huoy-Jen Yuh · Pittsford, US
• Michael Sanchez · Fairport, US
• Harold F. Hammond · Webster, US
• Helen R. Cherniack · Rochester, US
• Robert C. U. Yu · Webster, US
• John S. Facci · Webster, US
• Rachael L. McGrath · Churchville, US

Key dates

• Filing date: Nov 15, 2000
• Grant date: Dec 4, 2001
• Expiry date: Nov 15, 2020

Classification

• Technology area (CPC G): Physics
• CPC primary: G03G5/0564
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A charge transport layer material for a photoreceptor includes at least a polycarbonate polymer, at least one charge transport material, polytetrafluoroethylene particle aggregates having an average size of less than about 1.5 microns, hydrophobic silica and a fluorine-containing polymeric surfactant dispersed in a solvent. The presence of the hydrophobic silica enables the dispersion to have superior stability by preventing settling of the PTFE particles. A resulting charge transport layer produced from the dispersion exhibits excellent wear resistance against contact with an AC bias charging roll, excellent electrical performance, and delivers superior print quality.