Encapsulated toner processes

Details Encapsulated toner processes Encapsulated toner processes

1992-04-15

1994-02-01

Goodrow, John L.

Radiation imagery chemistry: process, composition, or product th

Microcapsule, process, composition, or product

G03G 9093

Patent

active

052831531

ABSTRACT:
A process for the preparation of encapsulated toner compositions which comprises dispersing a mixture of addition monomers, an optional preformed polymer resin, a free radical initiator, a colorant comprised of a pigment, dye or mixtures thereof, and shell forming monomer in an aqueous medium containing a cellulose polymer and a first ionic surfactant thereby forming a stable microdroplet suspension; and subsequently adding an aqueous solution of a second stabilizing surfactant followed by the formation of a soluble monomer forming shell wall by interfacial polymerization, and thereafter initiating and completing the core resin-forming free radical polymerization by heating thereby resulting in toner compositions with an average volume particle size of from about 3 to about 7 microns.

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patent: 5175071 (1992-12-01), Mychajlowskij

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