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SURFACE MODIFICATION OF ELECTRO- STATOGRAPHIC PHOTOSENSITIVE DEVICES

IP.com Disclosure Number: IPCOM000022831D
Original Publication Date: 1976-Feb-29
Included in the Prior Art Database: 2004-Mar-26
Document File: 2 page(s) / 229K

Publishing Venue

Xerox Disclosure Journal

Abstract

The surface of an electrostatographic photoreceptor is subjected to many perturbations from the functional sub~- systems in the xerographic process, e.g. development, transfer and cleaning. One approach to improving the surface characteristics of both inorganic and organic photoconductors has been to overcoat with a thin layer of some appropriate polymer, e.g. an acrylic. This material

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XEROX DISCLOSURE JOURNAL

SURFACE MODIFICATION OF ELECTRO- Proposed Classification
STATOGRAPHIC PHOTOSENSITIVE U.S. Cl. 96/L5
DEVICES mt. Cl. G03g 5/04
James M. Pearson

The surface of an electrostatographic photoreceptor is
subjected to many perturbations from the functional sub~-
systems in the xerographic process, e.g. development,
transfer and cleaning. One approach to improving the
surface characteristics of both inorganic and organic
photoconductors has been to overcoat with a thin layer of
some appropriate polymer, e.g. an acrylic. This material

can be selected for its dielectric, abrasion and surface
properties. The thickness of the overcoating layer is
selected so that it does not interfere with the photo~-
electric properties of the device but merely serves as a

protective layer. The present disclosure involves a
technique for improving the release and leveling properties
of an overcoating material and is especially applicable
for use in those devices in which a charge transfer material
is dispersed in a resinous matrix, The disclosed technique

is to mix a siloxane containing block copolymer having
polymeric segments compatible with the matrix material
with the matrix to form a layer having improved properties.

The concept has been reduced to practice by combining a
polycarbonate segmen,~containing/siloxane containing block
5~copolymer with Lexar~ polycarbonate and a charge transfer
agent to form a transport layer. A substantial reduction
in surface tension was observed as com...