FINE ELECTRETIC PARTICLES AND PROCESS FOR PRODUCING SAME
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United States of America Patent
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Aug 6, 2015
app pub date -
Mar 21, 2013
filing date -
Mar 21, 2012
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Abstract
The present invention provides fine electret particles comprising, at least in the surface portion of the particles, an electret resin and a polymeric dispersant, the electret resin being a fluorine-containing resin and being electretized by electron ray irradiation, radial ray irradiation, or corona discharge treatment. The fine electret particles are uniformly electrified, and well dispersed in an electrophoretic medium, while exhibiting excellent electrophoretic properties.
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