Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Process of making developer composition
Reexamination Certificate
2008-06-17
2009-11-10
Chapman, Mark A (Department: 1795)
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Process of making developer composition
C430S109400
Reexamination Certificate
active
07615328
ABSTRACT:
A process for preparing toner particles and compositions adapted for use in preparing toners that comprise a blend of a first polyester resin with a second sharp melting polyester resin. The process includes forming an emulsion resin comprising a branched polyester resin, a crystalline polyester resin, a colorant, and optionally a wax. The resin mixture is aggregated using an aggregating agent, such as a zinc acetate solution, to form an aggregate mixture. The aggregate mixture is then coalesced at a temperature of from about 5 to about 20° C. above the Tgof the emulsion resin to produce the resultant toner particles.
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Kirk Othmer Encyclopedia of Chemical Technology, Fourth Edition, vol. 19, pp. 888-894, A Wiley- Interscience Publication, John Wiley & Sons.
Chen Allen K.
Farrugia Valerie M.
Maric Milan
Mayer Fatima M.
Ng T. Hwee
Chapman Mark A
Fay Sharpe LLP
Xerox Corporation
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