Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Process of making developer composition
Patent
1990-12-28
1994-10-25
Rosasco, Steve
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Process of making developer composition
430109, 430138, G03G 500
Patent
active
053588215
ABSTRACT:
Polymer encapsulated pigment particles, or electrically passivated pigments, are dispersed in a thermoplastic binder resin by flushing an aqueous slurry or water-wet presscake of the encapsulated pigment particles, using an organic liquid, into the binder resin to form a uniform dispersion of the pigment particles in the binder resin. Subsequently, the dispersion is cooled, solidified and pulverized to form an electrophotographic toner. The triboelectric properties of toners containing pigments having different electrical properties can be thereby controlled, so that the tribos of different colored toners are within a narrow range.
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Bertrand Jacques C.
Ciccarelli Roger N.
Rosasco Steve
Xerox Corporation
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