Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Process of making developer composition
Patent
1996-04-08
1997-11-18
Goodrow, John
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Process of making developer composition
430 45, G03G 909
Patent
active
056886268
ABSTRACT:
A process for the preparation of a combination of color toners comprised of a cyan toner, a magenta toner, a yellow toner, and a black toner, each of said toners being comprised of resin and pigment, and wherein the pigment is cyan, magenta, yellow and black, each of the said pigments are dispersed in a nonionic, or neutral charge surfactant, and wherein each toner in the combination is prepared by
(i) preparing a pigment dispersion, which dispersion is comprised of a pigment and nonionic water soluble surfactant;
(ii) shearing said pigment dispersion with a latex or emulsion blend comprised of resin, a counterionic surfactant with a charge polarity of opposite sign to that of said ionic surfactant and a nonionic surfactant;
(iii) heating the above sheared blend below about the glass transition temperature (Tg) of the resin to form electrostatically bound toner size aggregates; and
(iv) heating said bound toner size aggregates above about the Tg of the resin.
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Kmiecik-Lawrynowicz Grazyna E.
McDougall Maria N. V.
Patel Raj D.
Veregin Richard P. N.
Goodrow John
Palazzo E. O.
Xerox Corporation
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