News Column

Patent Issued for Thymol Derivatives in Polyester Polymer Toner Resin

August 20, 2014

By a News Reporter-Staff News Editor at Journal of Engineering -- According to news reporting originating from Alexandria, Virginia, by VerticalNews journalists, a patent by the inventors Farrugia, Valerie M (Oakville, CA); Sacripante, Guerino G (Oakville, CA); Wosnick, Jordan H (Toronto, CA), filed on December 18, 2012, was published online on August 5, 2014.

The assignee for this patent, patent number 8795941, is Xerox Corporation (Norwalk, CT).

Reporters obtained the following quote from the background information supplied by the inventors: "Emulsion aggregation (EA) toner particles may comprise polyester resins, which resins are used to make polymer particles, where the particles are aggregated to form structures of a desired shape and size, followed by the coalescence of the aggregated particles, for example, at an elevated temperature. The components incorporated into the toner shape the characteristics of the final toner particles. For example, a colorant may be added, a wax may be added to provide release from a fuser roll, and a binder resin may be added to provide a low minimum fusing temperature (MFT). Another toner property which may be controlled by the components of the EA toner particles is fused image gloss. Examples of teachings of materials and methods for making EA toner include U.S. Pat. Nos. 5,290,654; 5,344,738; 5,346,797; 5,496,676; 5,501,935; 5,747,215; 5,840,462; 5,869,215; 6,828,073; 6,890,696; 6,936,396; 7,037,633; 7,049,042; 7,160,661; 7,179,575; 7,186,494; 7,217,484; 7,767,376; 7,829,253; 7,858,285; and 7,862,971, the disclosure of each of which hereby is incorporated by reference in its entirety.

"With an increased focus on environment and health, there is an interest and/or a need to find suitable reagent replacements to reduce health risks and on petroleum-based reagents associated with toner production and use. It is desirable, then, to employ toner that has a lower negative impact on the environment and on health."

In addition to obtaining background information on this patent, VerticalNews editors also obtained the inventors' summary information for this patent: "The instant disclosure provides a polyester resin comprising a polyhydroxylated thymol derivative used in manufacturing a polyester polymer for use in toner for imaging devices.

"In embodiments, a toner resin is disclosed comprising a polyester polymer comprising a polyol comprising a derivative of thymol, for example, reacted with glycerine carbonate. The product is a diol with aromatic character that can be incorporated into toner resins, for example, as a Tg-increasing component."

For more information, see this patent: Farrugia, Valerie M; Sacripante, Guerino G; Wosnick, Jordan H. Thymol Derivatives in Polyester Polymer Toner Resin. U.S. Patent Number 8795941, filed December 18, 2012, and published online on August 5, 2014. Patent URL:

Keywords for this news article include: Xerox Corporation.

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Source: Journal of Engineering

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