Photoconductor overcoat having a radical polymerizable charge transport molecule containing two ethyl acrylate functional groups and urethane acrylate resins containing six radical polymerizable functional groups

US9513591B2 · kind B2 · utility

Assignee

• Lexmark International, Inc. · US

Inventors

• David Glenn Black · Broomfield, US
• Mark Thomas Bellino · Loveland, US
• James Alan Hartman · Broomfield, US
• Weimei Luo · Louisville, US
• Scott Daniel Reeves · Louisville, US
• Tanya Yvonne Thames · Aurora, US

Key dates

• Filing date: Dec 7, 2015
• Grant date: Dec 6, 2016
• Expiry date: Dec 7, 2035

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K5/18
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

An improved overcoat layer for an organic photoconductor drum of an electrophotographic image forming device is provided. The overcoat layer is prepared from a curable composition including a triphenylamine charge transport containing two ethyl acrylate functional groups and a urethane resin containing six radical polymerizable functional groups. The amount of the triphenylamine charge transport containing two ethyl acrylate functional groups in the curable composition is about 20 to about 80 percent by weight. The amount of the urethane resin containing six radical polymerizable functional groups in the curable composition is about 20 to about 80 percent by weight. This overcoat layer improves wear resistance of the organic photoconductor drum without negatively altering the electrophotographic properties, thus protecting the organic photoconductor drum from damage and ultimately providing a photoconductor with a longer useful life when compared to other organic photoconductors commercially available.