Electrophotographic photosensitive member, electrophotographic apparatus, device unit, and facsimile machine employing the same

• US 5,374,494 A
• Filed: 05/27/1993
• Issued: 12/20/1994
• Est. Priority Date: 03/13/1991
• Status: Expired due to Fees

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Kashimura, Noboru, Sakoh, Harumi
• Primary Examiner(s): GOODROW, JOHN L
• Application Number:
  US08/068,839
• Time in Patent Office: 572 Days
• Field of Search: 430/67, 430/66, 430/96, 358/296
• US Class Current: 430/67
• CPC Class Codes: G03G 5/0592 Macromolecular compounds characterised by their structure or by their chemical properties, e.g. block polymers, reticulated polymers, molecular weight, acidity
• CPC Class Codes: G03G 5/147 Cover layers

Abstract

The present invention provides an electrophotographic photosensitive member which has a surface layer of high hardness, high resistance to abrasion and scratching, and high durability. The surface layer of the photosensitive member contains a polymerization product of a monomer compound represented by the formula (1) or (2). ##STR1##

Claims

1. An electrophotographic photosensitive member comprising an electroconductive support and a photosensitive layer formed thereon, the surface layer of the electrophotographic photosensitive member containing a polymerization reaction product of a monomer compound by the following formula:

##STR23## wherein R₉ is an alkylene group, an arylene group, a bivalent heterocyclic group or a group derived by combination thereof which may be substituted, and R₁₀, R₁₁, R₁₂, R₁₃, R₁₄, and R₁₅ are independently hydrogen or --R₁₆ --C(R₁₇)═

CH₂, R₁₆ being a substituted or unsubstituted alkylene group, --O--, --CO, --NH--, or --S--, or a group derived by combination thereof, R₁₇ being hydrogen, methyl, or phenyl, and not more than one of R₁₀ to R₁₅ are simultaneously hydrogen.

2. An electrophotographic photosensitive member according to claim 1, wherein the group R₁₇ is hydrogen.

3. An electrophotographic photosensitive member according to claim 1, wherein the group R₉ is selected form --C₆ H₃ (CH₃)--, --C₆ H₄ --CH₂ --C₆ H₄ --, and --C₆ H₄ --.

4. An electrophotographic photosensitive member according to claim 1, wherein the group R₉ is selected form --C₆ H₃ (CH₃)--, and --C₆ H₄ --.

5. An electrophotographic photosensitive member according to claim 1, wherein the surface layer is a photosensitive layer.

6. An electrophotographic photosensitive member according to claim 1, wherein the surface layer is a protecting layer.

7. An electrophotographic photosensitive member according to claim 1, wherein the photosensitive layer comprises a charge-generating layer and a charge-transporting layer.

8. An electrophotographic photosensitive member according to claim 7, wherein the charge-generating layer is the surface layer.

9. An electrophotographic photosensitive member according to claim 7, wherein the charge-transporting layer is the surface layer.

10. An electrophotographic photosensitive member according to claim 1, wherein the photosensitive layer is a single layer.

11. An electrophotographic photosensitive member according to claim 1, wherein the electrophotographic photosensitive member has a subbing layer between the photosensitive layer and the electroconductive support.

12. An electrophotographic apparatus, comprising an electrophotographic photosensitive member, an image forming means for forming a latent image, a developing means for developing the latent image, and a transferring means for transferring a developed image to a transfer-receiving material, said electrophotographic photosensitive member comprising an electroconductive support and a photosensitive layer formed thereon, the surface layer of the electrophotographic photosensitive member containing a polymerization reaction product of a monomer compound represented by the following formula:

##STR24## wherein R₉ is an alkylene group, an arylene group, a bivalent heterocyclic group or a group derived by combination thereof which may be substituted, and R₁₀, R₁₁, R₁₂, R₁₃, R₁₄, and R₁₅ are independently hydrogen or --R₁₆ --C(R₁₇)═

CH₂, R₁₆ being a substituted or unsubstituted alkylene group, --O--, --CO, --NH--, or --S--, or a group derived by combination thereof, R₁₇ being hydrogen, methyl, or phenyl, and not more than one of R₁₀ to R₁₅ are simultaneously hydrogen.

13. A device unit comprising an electrophotographic photosensitive member, a charging means, and a cleaning means, said electrophotographic photosensitive member comprising an electroconductive support and a photosensitive layer formed thereon, the surface layer of the electrophotographic photosensitive member containing a polymerization reaction product of a monomer compound represented by the following formula:

##STR25## wherein R₉ is an alkylene group, an arylene group, a bivalent heterocyclic group or a group derived by combination thereof which may be substituted, and R₁₀, R₁₁, R₁₂, R₁₃, R₁₄, and R₁₅ are independently hydrogen or --R₁₆ --C(R₁₇)═

CH₂, R₁₆ being a substituted or unsubstituted alkylene group, --O--, --CO, --NH--, or --S--, or a group derived by combination thereof, R₁₇ being hydrogen, methyl, or phenyl, and not more than one of R₁₀ to R₁₅ are simultaneously hydrogen, said unit holding integrally the electrophotographic photosensitive member, the charging means and the cleaning means, and being removable from the main body of an electrophotographic apparatus.

14. A device unit according to claim 13, wherein the device unit comprises a developing means.

15. A facsimile machine comprising an electrophotographic apparatus and an information-receiving means for receiving image information from a remote terminal, said electrophotographic apparatus comprising an electrophotographic photosensitive member, said electrophotographic photosensitive member comprising an electroconductive support and a photosensitive layer formed thereon, the surface layer of the electrophotographic photosensitive member containing a polymerization reaction product of a monomer represented by the following formula:

##STR26## wherein R₉ is an alkylene group, an arylene group, a bivalent heterocyclic group or a group derived by combination thereof which may be substituted, and R₁₀, R₁₁, R₁₂, R₁₃, R₁₄, and R₁₅ are independently hydrogen or --R₁₆ --C(R₁₇)═

CH₂, R₁₆ being a substituted or unsubstituted alkylene group, --O--, --CO, --NH--, or --S--, or a group derived by combination thereof, R₁₇ being hydrogen, methyl, or phenyl, and not more than one of R₁₀ to R₁₅ are simultaneously hydrogen.