Polymeric protective overcoatings contain hole transport materia

Details Polymeric protective overcoatings contain hole transport materia Polymeric protective overcoatings contain hole transport materia

1989-12-27

1991-10-08

Welsh, David

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

Radiation-sensitive composition or product

430 66, 430 67, 430 59, G03G 514

Patent

active

050553666

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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