| (19) |
 |
|
(11) |
EP 0 435 630 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
16.10.1991 Bulletin 1991/42 |
| (43) |
Date of publication A2: |
|
03.07.1991 Bulletin 1991/27 |
| (22) |
Date of filing: 21.12.1990 |
|
| (51) |
International Patent Classification (IPC)5: G03G 5/10 |
|
| (84) |
Designated Contracting States: |
|
BE DE FR GB |
| (30) |
Priority: |
29.12.1989 US 459265
|
| (71) |
Applicant: XEROX CORPORATION |
|
Rochester
New York 14644 (US) |
|
| (72) |
Inventors: |
|
- Berger, Stuart B.
Rochester,
New York, 14610 (US)
- Quinlan, Marion H.
Mississauga,
Ontario L5L 2YA (CA)
- Weatherall, Douglas J.
Downsview,
Ontario M3J 1KB (CA)
|
| (74) |
Representative: Goode, Ian Roy et al |
|
Rank Xerox Ltd
Patent Department
Parkway
Marlow
Buckinghamshire SL7 1YL
Marlow
Buckinghamshire SL7 1YL (GB) |
|
| |
|
| (54) |
Composition for imaging member layers and method for its production |
(57) An electrically conductive, semi-transparent, imaging member layer includes a polymer
having carbon black particles contained therein. The polymer is obtained by dispersing
carbon black particles in polymer reactants prior to and/or during polymerization
of the polymer. The carbon black particles become intimately connected with other
carbon black particles through polymeric chains formed when the polymer forming reactants
are reacted through free radical polymerization in the presence of carbon particles.
The layer can have comparable conductivity with that of dispersed carbon particles
in a polymer matrix, with between 10 and 50 times less carbon black particle loading.