ELECTROPHOTOGRAPHIC PHOTORECEPTOR, AND IMAGE FORMING APPARATUS AND PROCESS CARTRIDGE USING THE SAME

Abstract

An electrophotographic photoreceptor is provided including an electroconductive substrate; a photosensitive layer located overlying the electroconductive substrate; and an outermost layer located overlying the photosensitive layer, wherein the outermost layer is formed by a reaction between a radical polymerizable compound having no charge transport structure including a compound having a specific formula, and a radical polymerizable compound having a charge transport structure, while applying heat, light, or ionizing radiation to the reaction, and wherein at least one of the photosensitive layer and the outermost layer includes at least an arylmethane compound having an alkylamino group or a compound having a specific formula.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

These and other objects, features and advantages of the exemplary embodiments of the present invention will become apparent upon consideration of the following description of the exemplary embodiments of the present invention taken in conjunction with the accompanying drawings, wherein:

FIGS. 1 to 3 are schematic views illustrating cross-sections of exemplary embodiments of an electrophotographic photoreceptor of the present invention;

FIG. 4 is a schematic view illustrating an exemplary embodiment of an image forming apparatus of the present invention; and

FIG. 5 is a schematic view illustrating an exemplary embodiment of a process cartridge of the present invention.

Claims

1. An electrophotographic photoreceptor, comprising: an electroconductive substrate;a photosensitive layer located overlying the electroconductive substrate; andan outermost layer located overlying the photosensitive layer,wherein the outermost layer is formed by a reaction between a radical polymerizable compound having no charge transport structure and comprising a compound represented by the following formula (1), and a radical polymerizable compound having a charge transport structure, while applying at least one member selected from the group consisting of heat, light, and ionizing radiation to the reaction, andwherein at least one of the photosensitive layer and the outermost layer comprises at least one member selected from the group consisting of (A) an arylmethane compound having an alkylamino group, (B) a compound represented by the following formula (2), (C) a compound represented by the following formula (3), and (D) a compound represented by the following formula (4):

2. The electrophotographic photoreceptor according to claim 1, wherein the arylmethane compound having an alkylamino group is represented by the following formula (5):

3. The electrophotographic photoreceptor according to claim 1, wherein the arylmethane compound having an alkylamino group is represented by the following formula (6):

4. The electrophotographic photoreceptor according to claim 1, wherein the arylmethane compound having an alkylamino group is represented by the following formula (7):

5. The electrophotographic photoreceptor according to claim 1, wherein the arylmethane compound having an alkylamino group is represented by the following formula (8):

6. The electrophotographic photoreceptor according to claim 1, wherein the radical polymerizable compound having no charge transport structure further comprises a trifunctional or tetrafunctional radical polymerizable compound.

7. The electrophotographic photoreceptor according to claim 1, wherein the radical polymerizable compound having a charge transport structure has at least one functional group selected from the group consisting of an acryloyloxy group and a methacryloyloxy group.

8. The electrophotographic photoreceptor according to claim 1, wherein the radical polymerizable compound having a charge transport structure has a triarylamine structure.

9. The electrophotographic photoreceptor according to claim 1, wherein the radical polymerizable compound having a charge transport structure is a monofunctional radical polymerizable compound.

10. The electrophotographic photoreceptor according to claim 9, wherein the monofunctional radical polymerizable compound comprises at least one member selected from the group consisting of a compound represented by the following formula (9) and a compound represented by the following formula (10):

11. The electrophotographic photoreceptor according to claim 9, wherein the monofunctional radical polymerizable compound comprises a compound represented by the following formula (11):

12. The electrophotographic photoreceptor according to claim 1, wherein heat or light is applied to the reaction.

13. The electrophotographic photoreceptor according to claim 12, wherein light is applied to the reaction.

14. The electrophotographic photoreceptor according to claim 1, wherein the outermost layer has a thickness of from 1 to 15 μm.

15. The electrophotographic photoreceptor according to claim 1, wherein the photosensitive layer comprises a charge generation layer and a charge transport layer.

16. An image forming apparatus, comprising: the electrophotographic photoreceptor according to claim 1;a charging device configured to charge the electrophotographic photoreceptor;a latent image forming device configured to form an electrostatic latent image on the charged electrophotographic photoreceptor;a developing device configured to adhere a toner to the electrostatic latent image to form a toner image; anda transfer device configured to transfer the toner image onto a transfer medium.

17. A process cartridge detachably attachable to an image forming apparatus, comprising: the electrophotographic photoreceptor according to claim 1; anda developing device configured to adhere a toner to the electrostatic latent image to form a toner image.