Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1995-01-26
1996-09-24
Letscher, Geraldine
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
430112, 430114, 430115, 430116, 430117, 430118, 430119, G03G 900
Patent
active
055589685
ABSTRACT:
This invention comprises a single-component dendrimeric toner particle, and methods of making and using the toner particle in the liquid EP process. By using dendrimeric chemistry, a dendrimeric toner particle may be made that has controlled content, structure and size and that includes a colorant, a binder, and a charge director. The toner particles made this way will have high uniformity, so that toner dispersions containing them may be made to have good stability, print performance, and quality control. The colorant of choice for the toner particle is made the core of the dendrimer toner particle. Dendrons, which are made of generations of building or polymer units, branch out from the core and include a resin or other binder molecule, for binding the colorant to the paper in the EP process. One or more of the final polymer units, located at the terminus of the dendrons, comprise a coordinating or chelating agent for the toner charge director.
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Tomalia, Donald A. "Starburst.TM./Cascade Dendimers: Fundamental Building Blocks for a New Nanoscopic Chemistry Set" 1963, Aldrichimica Asta, vol. 26, No. 4; pp. 91-101.
Bearss James G.
Russell Dale D.
Hewlett--Packard Company
Letscher Geraldine
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