Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Process of making developer composition
Reexamination Certificate
2007-05-22
2007-05-22
Pezzuto, Helen L. (Department: 1713)
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Process of making developer composition
C430S114000, C430S115000, C430S116000, C524S804000, C526S317100, C526S319000, C526S322000, C526S328000, C526S328500, C526S329500
Reexamination Certificate
active
10693113
ABSTRACT:
The invention is directed to amphipathic polymeric particles that serve as both the dispersant and the binder in water based inks, ink compositions containing these particles, and methods for making the particles. The polymeric particles contain both hydrophilic and hydrophobic moieties with a pre-determined structure, and have an average diameter of 50 to 500 nm. The amphipathic polymeric particles may be prepared by a side-chain conversion method or a polymerization process involving an ATRP step, with or without a cross-linking agent. This invention improves the stability of polymer and inks by both ionic and steric stabilization of the suspended polymer particles.
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Hewlett--Packard Development Company, L.P.
Pezzuto Helen L.
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