Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1979-12-20
1982-04-13
Schilling, Richard L.
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
430107, 430110, G03G 910
Patent
active
043248519
ABSTRACT:
This invention is generally directed to a positively charged dry colored developer containing a resin, colored pigments, a single common carrier, and an alkyl pyridinium compound or the corresponding hydrate of the formula: ##STR1## wherein R is a hydrocarbon radical containing from about 8 to about 22 carbon atoms, and A is an anion, which in a preferred embodiment is selected from halides, sulfate, sulfonate, nitrate, borate, and phosphate. Examples of the colored pigments include magenta materials such as 2,9-dimethyl substituted quinacridones, while examples of cyan materials include copper tetra-4-(octadecylsulfonomido) phthalocyanines, and examples of yellow pigments include permanent yellow FGL, Color Index pigment yellow 97 and diaryldide yellow 3,3-dichloro benzidene, aceto anilides. The preferred resin is a styrene
-butylmethacrylate resin while the preferred carrier used in the developer composition is a steel coated carrier, wherein the coating is comprised of a polyvinylidene fluoride resin. This developer composition was found to be useful in developing colored images in a xerographic fixture, wherein the photoreceptor contained in such system is charged negatively.
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Erhardt Peter F.
Lu Chin H.
Sherony Dominic F.
Goodrow John L.
Palazzo E. O.
Schilling Richard L.
Xerox Corporation
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