Polymeric protective overcoatings contain hole transport material for electrophotographic imaging members
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United States of America Patent
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-
Oct 8, 1991
Grant Date -
N/A
app pub date -
Dec 27, 1989
filing date -
Dec 27, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A protective overcoating layer for an electrophotographic imaging device prevents crystallization and leaching of charge transport compounds in a charge transport layer of the device, while also preventing solvent and ink contact/bending stress charge transport layer cracking. The overcoating layer contains a film forming binder material or polymer blend doped with a charge transport compound in an amount less than about 10% by weight. The overcoating layer may alternatively contain a single component hole transporting carbazole polymer or polymer blend of hole transport carbazole polymer with a film forming polymer.
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