High Molecular Weight Steric Barrier for Electrophoretic Particles
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United States of America Patent
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Issued Date -
Jun 27, 2013
app pub date -
Dec 27, 2011
filing date -
Dec 27, 2011
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Abandoned
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Abstract
The present invention is directed to a pigment particle comprising a core pigment particle the surface of which is covered by a barrier layer formed of a polymer having an average molecular weight of more than about 200 kDa. Such pigment particle used in an electrophoretic fluid can reduce residual image.
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