Toner processes

US6541175B1 · kind B1 · utility

Assignee

• Xerox Corporation · US

Inventors

• Lu Jiang · Oakville, CA
• Walter Mychajlowskij · Superior, US
• Guerino G. Sacripante · Oakville, CA
• Raj D. Patel · Oakville, CA
• Michael A. Hopper · Toronto, CA

Key dates

• Filing date: Feb 4, 2002
• Grant date: Apr 1, 2003
• Expiry date: Feb 4, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2367/02
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A process involving, for example, providing or generating an emulsion latex comprised of sodio sulfonated polyester resin particles by adding with shearing to the latex a colorant dispersion comprising from about 20 to about 50 percent of a predispersed colorant in water, followed by the addition of an organic or an inorganic acid; heating the resulting mixture at a temperature of from about 45° C. to about 65° C. followed by the addition of an water insoluble metal salt or water insoluble metal oxide thereby releasing metal ions and permitting aggregation and coalescence, resulting in toner particles; and optionally cooling the mixture and isolating the product.