Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Process of making developer composition
Patent
1994-06-27
1996-03-05
McGinty, Douglas J.
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Process of making developer composition
430108, 427221, 252511, 252502, 252510, G03G 9087, G03G 9083, G03G 9113, G03G 9107
Patent
active
054966752
ABSTRACT:
A process for the preparation of conductive, electronegative, submicron polymeric particles comprised of a first polymer optionally containing from about 1 to about 50 percent by weight of a conductive filler and a second electronegative, contrast polymer, and wherein said conductive polymer particles with optional filler are prepared by mixing at least one monomer with a polymerization initiator, a crosslinking component and a chain transfer component; effecting bulk polymerization until from about 5 to about 50 weight percent of the monomer has been polymerized; terminating polymerization by cooling the partially polymerized monomer; adding thereto from about 1 to about 50 weight percent of a conductive filler or conductive fillers, followed by mixing thereof; dispersing the aforementioned mixture of conductive filler or fillers, and partially polymerized product in water containing a stabilizing component to obtain a suspension of particles with an average diameter of from about 0.05 to about 1 micron in water; polymerizing the resulting suspension by heating; adding a second contrast polymer emulsion, suspension or fine dispersion with high shear mixing; and optionally subsequently washing and drying the polymer particles obtained.
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Cunningham Michael
Kelly Bernard A.
Van Dusen John G.
McGinty Douglas J.
Palazzo E. O.
Xerox Corporation
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