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THE USE OF SILOXANE CONTAINING BLOCK COPOLYMERS TO OVERCOME SURFACE CONDUCTIVITY AND HIGH DARK DECAY IN ORGANIC PHOTOCONDUCTORS

IP.com Disclosure Number: IPCOM000023354D
Original Publication Date: 1977-Jun-30
Included in the Prior Art Database: 2004-Mar-30
Document File: 2 page(s) / 340K

Publishing Venue

Xerox Disclosure Journal

Abstract

Photoconductors work in electrostatographic imaging devices because: 1) there is little lateral surface conductivity of the image charge prior to toning, and 2) there is little dark decay in the time period between imaging and toning. If either of these cri-tenon are not met, inferior images or no images at all are produced.

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XEROX DISCLOSURE JOURNAL

THE USE OF SILOXANE CONTAINING Proposed Classification
BLOCK COPOLYMERS TO OVERCOME U.S. Cl, 96/1,5
SURFACE CONDUCTIVITY AND HIGH mt. Cl. G03g 5/04
DARK DECAY IN ORGANIC PHOTO-
CONDUCTORS
Darlyn F. Hinman
John M. Pochan

Photoconductors work in electrostatographic imaging devices
because:

1) there is little lateral surface conductivity of
the image charge prior to toning, and

2) there is little dark decay in the time period
between imaging and toning. If either of these cri-
tenon are not met, inferior images or no images at
all are produced.

In many organic electrostatographic imaging devices, such as a
plate comprising a charge generator layer with a poly (vinyl-
carbazole) charge transport overcoating, there is a possibil-
ity that extreme conditions in the developer system (ozone,
high intensity lights, etc.) can cause formation of molecular
species that will increase surface conduction or decrease
injection barriers so that high dark decay results. Disclosed
herein is a method of overcoating these deleterious effects by
incorporating a very thin insulating layer on the surface of
the organic system that will not react chemically under the
stringent conditions of machine performance. This is accom-
plished by placing small amounts of a block copolymer whose
two components are (1) similar to the organic material of the
imaging device and (2) polydimethylsiloxane into the transport
layer when it is formed, The low surface tension of the poly~
dimethylsiloxane com...