Claims
- 1. An electrophotographic photoconductor having reduced discharged-area fatigue and reduced fatigue upon exposure to room light, comprising:
- a ground plane member,
- a charge generating layer carried by said ground plane member, said charge generating layer including a squarylium charge generating material capable of generating hole/electron pairs in the presence of activating radiation, and
- a charge transport layer carried by said charge generating layer, said charge transport layer including a hydrazone material capable of transporting generated holes from said charge generating layer to the exposed surface of said charge transport layer,
- said charge generation layer and said charge transport layer including a polymeric binder material comprising an ordered copolyestercarbonate whose ester content is in the range of about 35 to 70 wt. %.
- 2. An electrophotographic photoconductor in accordance with claim 1 wherein said charge transport material is DEH.
- 3. An electrophotographic photoconductor in accordance with claim 1 wherein said charge generation material is OHSQ.
- 4. An electrophotographic photoconductor in accordance with claim 1 wherein said charge transport material is DEH, and said charge generation material is OHSQ.
- 5. An electrophotographic photoconductor in accordance with claim 4 wherein said charge generation layer and said charge transport layer including a polymeric binder material comprising an ordered copolyestercarbonate whose ester content is in the range of about 60 to 70 wt. %.
- 6. An electrophotographic photoconductor in accordance with claim 5 wherein said polymeric binder material comprises an ordered copolyestercarbonate whose ester content is about 70 wt. %.
- 7. An electrophotographic photoconductor, comprising:
- a charge generating layer having a charge generating material in a polymeric binder, said charge generating material being capable of generating hole/electron pairs in the presence of activating radiation, and
- a charge transport layer carried by said charge generating layer, said charge transport layer comprising a hydrazone material capable of transporting generated holes from said charge generating layer to the exposed surface of said charge transport layer, and an ordered copolyestercarbonate whose ester content is in the range of about 35 to 70 wt. %.
- 8. An electrophotographic photoconductor in accordance with claim 7 wherein said charge transport material is DEH.
- 9. An electrophotographic photoconductor in accordance with claim 8 wherein said ordered copolyestercarbonate has an ester content in the range of about 60 to 70 wt. %.
- 10. An electrophotographic photoconductor in accordance with claim 9 wherein said ordered copolyestercarbonate has an ester content of about 70 wt. %.
- 11. An electrophotographic photoconductor in accordance with claim 10 including a ground plane member on which said charge generating layer is located.
- 12. An electrophotographic photoconductor in accordance with claim 7 wherein said charge transport material is 2-methyl-4-diethylaminobenzaldehyde,1,1-diphenylhydrazone.
- 13. An electrophotographic photoconductor, comprising:
- a charge generating layer comprising a squarylium material capable of generating hole/electron pairs in the presence of activating radiation, and an ordered copolyestercarbonate whose ester content is in the range of about 35 to 70 wt. %, and
- a charge transport layer carried by said charge generating layer, said charge transport layer having a charge transport material in a polymeric binder.
- 14. An electrophotographic photoconductor in accordance with claim 13 wherein said charge generating material is OHSQ.
- 15. An electrophotographic photoconductor in accordance with claim 14 including a ground plane member on which said charge generating layer is located.
- 16. An electrophotographic photoconductor in accordance with claim 15 wherein said ordered copolyestercarbonate has an ester content in the range of about 60 to 70 wt. %.
- 17. An electrophotographic photoconductor in accordance with claim 16 wherein said ordered copolyestercarbonate has an ester content of about 70 wt. %.
- 18. A method of making a layered electrophotographic photoconductor having reduced discharged-area fatigue and reduced fatigue upon exposure to room light, comprising:
- providing a ground plane member,
- mixing an ordered copolyestercarbonate whose ester content is in the range of about 35 to 70 wt. % in a first solvent to form a first solution,
- mixing a squarylium charge generating material in said first solution to form a coating dispersion in the absence of amines,
- coating said coating dispersion on said ground plane member to form a charge generating layer on said ground plane member, and subsequently processing said charge generation layer to drive off said first solvent,
- mixing an ordered copolyestercarbonate whose ester content is in the range of about 35 to 70 wt. % in a second solvent to form a second solution,
- mixing a hydrazone charge transport material in said second solution to form a coating solution, and
- coating said coating solution on said charge generating layer to form a charge transport layer on said charge generating layer, and subsequently processing said charge transport layer to drive off said second solvent.
- 19. A method of making a layered electrophotographic photoconductor in accordance with claim 18 wherein said hydrazone charge transport material is DEH.
- 20. A method of making a layered electrophotographic photoconductor in accordance with claim 18 wherein said squarylium charge generation material is OHSQ.
- 21. A method of making a layered electrophotographic photoconductor in accordance with claim 18 wherein said hydrazone charge transport material is DEH, and said squarylium charge generation material is OHSQ.
- 22. A method of making a layered electrophotographic photoconductor in accordance with claim 21 wherein the ester content of the ordered copolyestercarbonate of said first and second solutions is in the range of about 60 to about 70 wt. %.
- 23. A method of making a layered electrophotographic photoconductor in accordance with claim 22 wherein the ester content of the ordered copolyestercarbonate of said first and second solutions is about 70 wt. %.
- 24. A method of making a layered electrophotographic photoconductor in accordance with claim 23 wherein said first and second solvents are THF.
- 25. A drum shaped electrophotographic photoconductor for use in an electrophotographic reproduction device, comprising:
- an aluminum drum,
- a polyamide barrier layer coated on the exterior aluminum surface of said drum,
- a polymeric subbing layer coated on said barrier layer,
- a squarylium-containing, dispersion-coated, CGL coated on said subbing layer, said CGL including an ordered copolyestercarbonate having an ester content in the range of about 35 to about 70 wt. % as a binder, and
- a hydrazone-containing, solution-coated, CTL coated on said CGL, said CTL including said ordered copolyestercarbonate as a binder.
- 26. A drum shaped electrophotographic photoconductor in accordance with claim 25 wherein said subbing layer comprises said ordered copolyestercarbonate.
- 27. A drum shaped electrophotographic photoconductor in accordance with claim 26 wherein said ordered copolyestercarbonate has an ester content in the range of about 60 wt. % to about 70 wt. %.
- 28. A drum shaped electrophotographic photoconductor in accordance with claim 27 wherein said ordered copolyestercarbonate has an ester content of 70 wt. %.
- 29. An electrophotographic photoconductor comprising:
- a ground plane member,
- a charge generation layer carried by said ground plane member, said charge generation layer including an operative phthalocyanine charge generation material capable of generating hole/electron pairs in the presence of activating radiation, and a polymeric binder material comprising an ordered copolyestercarbonate whose ester content is in the range of about 35 to 70 wt. %, and
- a charge transport layer carried by said charge generation layer and including a material capable of transporting generated holes from said charge generating layer to the exposed surface of said charge transport layer.
- 30. An electrophotographic photoconductor in accordance with claim 29 wherein said ester content is in the range of about 60 to 70 wt. %.
- 31. An electrophotographic photoconductor in accordance with claim 29 wherein said ester content is about 70 wt. %.
- 32. An electrophotographic photoconductor in accordance with claim 29 wherein said charge generation material is an oxytitanium phthalocyanine.
- 33. An electrophotographic photoconductor in accordance with claim 30 wherein said charge generation material is an oxytitanium phthalocyanine.
- 34. An electrophotographic photoconductor in accordance with claim 31 wherein said charge generation material is an oxytitanium phthalocyanine.
- 35. An electrophotographic photoconductor comprising:
- a ground plane member,
- a charge generation layer carried by said ground plane member, said charge generation layer including a charge generation material capable of generating hole/electron pairs in the presence of activating radiation, and
- a charge transport layer carried by said charge generation layer and including a TPH material capable of transporting generated holes from said charge generating layer to the exposed surface of said charge transport layer and a polymeric binder material comprising an ordered copolyestercarbonate whose ester content is in the range of about 35 to 70 wt. %.
- 36. An electrophotographic photoconductor in accordance with claim 35 wherein said ester content is in the range of about 60 to 70 wt. %.
- 37. An electrophotographic photoconductor in accordance with claim 35 wherein said ester content is about 70 wt. %.
- 38. An electrophotographic photoconductor comprising:
- a ground plane member,
- a charge generation layer carried by said ground plane member, said charge generation layer including an oxytitanium phthalocyanine charge generation material capable of generating hole/electron pairs in the presence of activating radiation, and a polymeric binder material comprising an ordered copolyestercarbonate whose ester content is in the range of about 35 to 70 wt. %, and
- a charge transport layer carried by said charge generation layer and including a TPH material capable of transporting generated holes from said charge generating layer to the exposed surface of said charge transport layer and a polymeric binder material comprising an ordered copolyestercarbonate whose ester content is in the range of about 35 to 70 wt. %.
- 39. An electrophotographic photoconductor in accordance with claim 38 wherein said ester content of said charge generation layer and said charge transport layer is in the range of about 60 to 70 wt. %.
- 40. An electrophotographic photoconductor in accordance with claim 38 wherein said ester content of said charge generation layer and said charge transport layer is about 70 wt. %.
RELATED PATENT APPLICATION
This application is a continuation in part of copending and commonly assigned patent application Ser. No. 07/401,263, filed 8/31/89, and entitled Electrophotographic Photoconductor.
US Referenced Citations (4)
Number |
Name |
Date |
Kind |
4150987 |
Anderson et al. |
Apr 1979 |
|
4390610 |
Bowder et al. |
Jun 1983 |
|
4391888 |
Chang et al. |
Jul 1983 |
|
4737414 |
Hirt et al. |
Apr 1988 |
|
Foreign Referenced Citations (1)
Number |
Date |
Country |
0318943 |
Jul 1989 |
EPX |
Non-Patent Literature Citations (2)
Entry |
Patent Abstracts of Japan, vol. 9, No. 182 (P-376) (1905), Jul. 27, 1985, "Electrophotographic Sensitive Body and Its Manufacture". |
Patent Abstracts of Japan, vol. 12, No. 151 (P-699) (2998), May 11, 1988, "Binder Resin for Electrophotographic Sensitive Body". |
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
401263 |
Aug 1989 |
|