Process for producing electrophotographic photosensitive member and electrophotographic photosensitive member

• US 20020001767A1
• Filed: 02/23/2001
• Published: 01/03/2002
• Est. Priority Date: 02/29/2000
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Yamazaki, Itaru, Uesugi, Hirotoshi, Kawamorita, Yoichi, Soma, Takao, Miki, Nobumichi
• Granted Patent: US 6,444,384 B2
• Time in Patent Office: Days
• US Class Current: 430/133
• CPC Class Codes: G03G 5/0525 Coating methods
• CPC Class Codes: G03G 5/0564 Polycarbonates
• CPC Class Codes: G03G 5/06142 arylamine
• CPC Class Codes: G03G 5/06147 alkenylarylamine

Abstract

A process for producing an electrophotographic photosensitive member which has a charge-generating layer and a charge-transporting layer on a substrate, has steps of applying a solution containing a charge-transporting material, binder resin, dimethoxymethane, and an aromatic hydrocarbon-based solvent having a boiling point of 130° C. or higher, and drying the solution, to form the charge-transporting layer.

Claims

1. A process for producing an electrophotographic photosensitive member which has a charge-generating layer and a charge-transporting layer on a substrate, comprising steps of applying a solution containing a charge-transporting material, binder resin, dimethoxymethane, and an aromatic hydrocarbon-based solvent having a boiling point of 130°

C. or higher, and drying the solution, to form the charge-transporting layer.

2. The process according to claim 1, wherein said aromatic hydrocarbon-based solvent has a boiling point of 130°

C. or higher but 200°

C. or lower.

3. The process according to claim 1, wherein a weight ratio of said dimethoxymethane to said aromatic hydrocarbon-based solvent is in a range from 5:

95 to 60;

40.

4. The process according to claim 1, wherein said aromatic hydrocarbon-based solvent is selected from the group consisting of xylene, ethylbenzene, anisole, propylbenzene, mesitylene and monochlorobenzene.

5. The process according to claim 4, wherein said aromatic hydrocarbon-based solvent is selected from the group consisting of xylene, ethylbenzene, and monochlorobenzene.

6. The process according to claim 5, wherein said aromatic hydrocarbon-based solvent is xylene or ethylbenzene.

7. The process according to claim 5, wherein said aromatic hydrocarbon-based solvent is monochlorobenzene.

8. The process according to claim 1;

wherein said charge-transporting material is selected from the group consisting of the compounds shown by the following formulae;

9. The process according to claim 1, wherein said binder resin is one of polycarbonate resin and polyarylate resin.

10. The process according to claim 9, wherein said binder resin is polycarbonate resin.

11. The process according to claim 9, wherein said binder resin is polyarylate resin.

12. The process according to claim 10, wherein said polycarbonate resin has a structural unit selected from those shown by the following formulae:

13. The process according to claim 11, wherein said polyarylate resin has a structural unit selected from those shown by the following formulae:

14. The process according to claim 1, wherein said solution further contains an antioxidant.

15. The process according to claim 1, wherein said antioxidant has a hindered phenol structure.

16. The process according to claim 1, wherein said antioxidant is incorporated at 10 to 500 ppm based on dimethoxymethane.

17. The process according to claim 1, wherein said electrophotographic photosensitive member has said substrate, charge-generating layer, and charge-transporting layer in this order.

18. An electrophotographic photosensitive member comprising a substrate, a charge-generating layer and a charge-transporting layer, wherein the charge-transporting layer is formed by applying a solution containing a charge-transporting material, binder resin, dimethoxymethane, and an aromatic hydrocarbon-based solvent having a boiling point of 130°

C. or higher, and drying the solution.

19. The electrophotographic photosensitive member according to claim 18, wherein said aromatic hydrocarbon-based solvent has a boiling point of 130°

C. or higher but 200°

C. or lower.

20. The electrophotographic photosensitive member according to claim 18, wherein a weight ratio of said dimethoxymethane to said aromatic hydrocarbon-based solvent is in a range from 5:

95 to 60;

40.

21. The electrophotographic photosensitive member according to claim 18, wherein said aromatic hydrocarbon-based solvent is selected from the group consisting of xylene, ethylbenzene, anisole, propylbenzene, mesitylene, and monochlorobenzene.

22. The electrophotographic photosensitive member according to claim 21, wherein said aromatic hydrocarbon-based solvent is selected from the group consisting of xylene, ethylbenzene, and monochlorobenzene.

23. The electrophotographic photosensitive member according to claim 22, wherein said aromatic hydrocarbon-based solvent is xylene or ethylbenzene.

24. The electrophotographic photosensitive member according to claim 22, wherein said aromatic hydrocarbon-based solvent is monochlorobenzene.

25. The electrophotographic photosensitive member according to claim 18, wherein said charge-transporting material is selected from the group consisting of the compounds shown by the following formulae:

26. The electrophotographic photosensitive member according to claim 18, wherein said binder resin is one of polycarbonate resin and polyarylate resin.

27. The electrophotographic photosensitive member according to claim 26, wherein said binder resin is polycarbonate resin.

28. The electrophotographic photosensitive member according to claim 26, wherein said binder resin is polyarylate resin.

29. The electrophotographic photosensitive member according to claim 27, wherein said polycarbonate has the structural unit selected from those shown by the following formulae:

30. The electrophotographic photosensitive member according to claim 28, wherein said polyarylate resin has the structural unit selected from those shown by the following formulae:

31. The electrophotographic photosensitive member according to claim 18, wherein said solution further contains an antioxidant.

32. The electrophotographic photosensitive member according to claim 18, wherein said antioxidant has a hindered phenol structure.

33. The electrophotographic photosensitive member according to claim 18, wherein said antioxidant is incorporated at 10 to 500 ppm based on dimethoxymethane.

34. The electrophotographic photosensitive member according to claim 18, wherein said electrophotographic photosensitive member has said substrate, charge-generating layer, and charge-transporting layer in this order.