Phase change inks

US7407539B2 · kind B2 · utility

Assignee

• Xerox Corporation · US

Inventors

• Bo Wu · Hengshan, TW
• Stephan V. Drappel · Toronto, CA
• Trevor James Snyder · Newberg, US
• Donald R. Titterington · Tualatin, US
• Jule W. Thomas, Jr. · West Linn, US
• C Geoffrey Allen · Burlington, CA
• Harold R. Frame · Gaston, US
• Wolfgang G. Wedler · Tualatin, US

Key dates

• Filing date: Nov 30, 2005
• Grant date: Aug 5, 2008
• Expiry date: Sep 13, 2026

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D11/34
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Disclosed is a phase change ink comprising (a) a colorant and (b) a phase change ink carrier, said carrier comprising (i) a branched triamide and (ii) a polyethylene wax having an average peak molecular weight of from about 350 to about 730, a polydispersity of from about 1.03 to about 3.0, and an asymmetrical molecular weight distribution skewed toward the high molecular weight end. Also disclosed is a process which comprises (1) incorporating into an ink jet printing apparatus a phase change ink comprising (a) a colorant and (b) a phase change ink carrier, said carrier comprising (i) a branched triamide and (ii) a polyethylene wax having an average peak molecular weight of from about 350 to about 730, a polydispersity of from about 1.03 to about 3.0, and an asymmetrical molecular weight distribution skewed toward the high molecular weight end; (2) melting the ink; and (3) causing droplets of the melted ink to be ejected in an imagewise pattern onto a substrate.