| (19) |
 |
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(11) |
EP 1 011 033 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
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16.08.2000 Bulletin 2000/33 |
| (43) |
Date of publication A2: |
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21.06.2000 Bulletin 2000/25 |
| (22) |
Date of filing: 29.11.1999 |
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| (51) |
International Patent Classification (IPC)7: G03G 9/113 |
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| (84) |
Designated Contracting States: |
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AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
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Designated Extension States: |
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AL LT LV MK RO SI |
| (30) |
Priority: |
15.12.1998 JP 35554298
15.12.1998 JP 35554498
21.12.1998 JP 36322098
|
| (71) |
Applicant: Dow Corning Toray Silicone Company, Ltd. |
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Tokyo 100-0005 (JP) |
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| (72) |
Inventors: |
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- Furukawa, Haruhiko, Dow Corning Toray Sil.Co.,Ltd.
Ichibara-shi, Chiba Prefecture (JP)
- Aso, Takayuki, Dow Corning Toray Sil.Co.,Ltd.
Ichibara-shi, Chiba Prefecture (JP)
- Ucki, Hiroshi, Dow Corning Toray Sil.Co.,Ltd.
Ichibara-shi, Chiba Prefecture (JP)
- Morita, Yoshitsugu, Dow Corning Toray Sil.Co.,Ltd.
Ichibara-shi, Chiba Prefecture (JP)
|
| (74) |
Representative: Sama, Daniele, Dr. |
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Sama Patents, Via G.B. Morgagni, 2
20129 Milano
20129 Milano (IT) |
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| |
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| (54) |
Carrier, toner and electrophotographic photoreceptor comprising a carbosiloxane dendrimer-functional
vinyl type polymer |
(57) A carrier for developing electrostatic latent images has an excellent charging stability,
resistance to spenting, and durability and can provide high resolution images over
long periods of operation. The carrier achieves these advantageous effects because
it contains a pendant carbosiloxane dendrimer-functional vinyl-type polymer. A toner
for developing electrostatic images also contains the pendant carbosiloxane dendrimer-functional
vinyl-type polymer. The toner has an excellent fluidity, releasability, fixing behavior,
resistance to offset, and flexibility and can provide high resolution images. The
toner and carrier can be used in various imaging technologies, e.g., electrophotographic
technologies, electrostatic recording technologies, and electrostatic printing technologies.
An electrophotographic photoreceptor contains, in at least its surface layer, a binder
resin and the pendant carbosiloxane dendrimer-functional vinyl-type polymer.