Photoconductor, image forming apparatus, and process cartridge

Patent metadata

Field	Value
Publication number	US-9846377-B2
Application number	US-201615331313-A
Country	US
Kind code	B2
Filing date	Oct 21, 2016
Priority date	Nov 30, 2015
Publication date	Dec 19, 2017
Grant date	Dec 19, 2017

Abstract

A photoconductor includes an electroconductive substrate; an undercoat layer overlying the electroconductive substrate; and a photosensitive layer overlying the undercoat layer. The undercoat layer includes a urethane resin, a metal oxide particle and a compound having the following formula (1):

wherein R1 to R8 independently represent a hydrogen atom, a nitro group, a cyano group, a halogen atom, a hydroxyl group, a saturated or an unsaturated aliphatic hydrocarbon group optionally having a substituent, an aromatic hydrocarbon group optionally having a substituent, an alkoxy group optionally having a substituent, an aryloxy group optionally having a substituent, a sulfo group optionally having a substituent, an amino group, a dialkylamino group optionally having a substituent or an diarylamino group optionally having a substituent; and R3 and R4, R4 and R5, R6 and R7, and R7 and R8 may be bonded with each other to form an aromatic ring.

First claim

What is claimed is:

1. A photoconductor, comprising:
an electroconductive substrate;
an undercoat layer overlying the electroconductive substrate; and
a photosensitive layer overlying the undercoat layer,
wherein the undercoat layer includes a urethane resin, a metal oxide particle and a compound having the following formula (1):

 wherein each of R1 to R8 independently represents a hydrogen atom, a nitro group, a cyano group, a halogen atom, a hydroxyl group, a saturated or an unsaturated aliphatic hydrocarbon group which may have a substituent, an aromatic hydrocarbon group which may have a substituent, an alkoxy group which may have a substituent, an aryloxy group which may have a substituent, a sulfo group which may have a substituent, an amino group, a dialkylamino group which may have a substituent or an diarylamino group which may have a substituent; and R3 and R4, R4 and R5, R6 and R7, and R7 and R8 may be bonded with each other to form an aromatic ring.

2. The photoconductor of claim 1 , wherein the metal oxide particle is a zinc oxide particle.

3. The photoconductor of claim 1 , wherein the undercoat layer further includes a salicylic acid derivative.

4. The photoconductor of claim 1 , wherein the urethane resin is a curable resin.

5. The photoconductor of claim 1 , wherein the undercoat layer has an average thickness of from 7 μm to 30 μm.

6. The photoconductor of claim 1 , wherein the photosensitive layer comprises an azo pigment as a charge generation material.

7. An image forming apparatus, comprising:
the photoconductor according to claim 1 ;
a charger to charge the surface of the photoconductor;
an irradiator to irradiate the surface of the photoconductor to form an electrostatic latent image;
an image developer to develop the electrostatic latent image with a toner to form a visible image; and
a transferer to transfer the visible image onto a recording medium.

8. A process cartridge, comprising:
the photoconductor according to claim 1 ; and at least a member selected from a group consisting of:
a charger to charge the surface of the photoconductor;
an irradiator to irradiate the surface of the photoconductor to form an electrostatic latent image;
an image developer to develop the electrostatic latent image with a toner to form a visible image; and
a transferer to transfer the visible image onto a recording medium.

Assignees

• Asano Tomoharu
• Kurimoto Eiji
• Suzuki Tetsuro
• Nii Daisuke
• Ishida Toshihiro
• Ricoh Co Ltd

Inventors

• Asano Tomoharu
• Kurimoto Eiji
• Suzuki Tetsuro
• Nii Daisuke
• Ishida Toshihiro

Classifications

• G03G5/047 Primary

  characterised by the charge-generation layers or charge transport layers {(G03G5/0433 and G03G5/0436 take precedence)} · CPC title

• G03G5/144

  comprising inorganic material · CPC title

• G03G5/142

  Inert intermediate layers · CPC title

• G03G5/0675 Primary

  Azo dyes · CPC title