Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Process of making developer composition
Patent
1996-06-17
1997-08-19
Rodee, Christopher D.
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Process of making developer composition
524605, 430904, G03G 9087
Patent
active
056587040
ABSTRACT:
A process for the preparation of toner comprised of
i) flushing pigment into a sulfonated polyester resin, and which resin has a degree of sulfonation of from between about 0.5 and about 2.5 mol percent based on the repeat unit of the polymer;
ii) dispersing the resulting pigmented sulfonated polyester resin in warm water, which water is at a temperature of from about 40.degree. to about 95.degree. C., and which dispersing is accomplished by a high speed shearing polytron device operating at speeds of from about 100 to about 5,000 revolutions per minute thereby enabling the formation of toner sized particles, and which particles are of a volume average diameter of from about 3 to about 10 microns with a narrow GSD;
iii) recovering said toner by filtration;
iv) drying said toner by vacuum; and
v) optionally adding to said dry toner charge additives and flow aids.
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Foucher Daniel A.
Patel Raj D.
Sacripante Guerino G.
Palazzo E. O.
Rodee Christopher D.
Xerox Corporation
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