Electrophotographic photosensitive member, method for producing electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus

Patent metadata

Field	Value
Publication number	US-9804512-B2
Application number	US-201414775333-A
Country	US
Kind code	B2
Filing date	Mar 6, 2014
Priority date	Mar 13, 2013
Publication date	Oct 31, 2017
Grant date	Oct 31, 2017

Abstract

An electrophotographic photosensitive member includes a support, an undercoat layer which contains a metal oxide particle and is formed on the support, a charge generating layer formed on the undercoat layer, and a charge transporting layer formed on the charge generating layer. Either or both of the undercoat layer and the charge generating layer contain a compound represented by formula (1).

First claim

The invention claimed is:

1. An electrophotographic photosensitive member comprising:
a support;
an undercoat layer which comprises a metal oxide particle and is formed on the support;
a charge generating layer formed on the undercoat layer; and
a charge transporting layer formed on the charge generating layer,
wherein either or both of the undercoat layer and the charge generating layer comprise a compound represented by the following formula (1),

wherein R 1 to R 8 each independently represents a hydrogen atom, an alkyl group, a hydroxy group, an amino group, or a carboxyl group.

2. The electrophotographic photosensitive member according to claim 1 , wherein R 1 to R 8 each independently represents a hydrogen atom or a hydroxy group.

3. The electrophotographic photosensitive member according to claim 1 , wherein the undercoat layer comprises the compound represented by the formula (1).

4. The electrophotographic photosensitive member according to claim 3 , wherein a content of the compound represented by the formula (1) in the undercoat layer is 0.01% by mass or more and 50% by mass or less relative to the metal oxide particle contained in the undercoat layer.

5. The electrophotographic photosensitive member according to any one of claim 1 , wherein the charge generating layer comprises the compound represented by the formula (1).

6. The electrophotographic photosensitive member according to claim 5 , wherein a content of the compound represented by the formula (1) in the charge generating layer is 0.02% by mass or more and 20% by mass or less relative to a charge generating substance contained in the charge generating layer.

7. The electrophotographic photosensitive member according to any one of claim 1 , wherein the metal oxide particle is a particle containing at least one selected from the group consisting of titanium oxide, zinc oxide, and tin oxide.

8. A method for producing an electrophotographic photosensitive member including an undercoat layer which comprises a metal oxide particle and is formed on a support, a charge generating layer formed on the undercoat layer, and a charge transporting layer formed on the charge generating layer, the method comprising:
forming a coat of an undercoat layer coating solution containing the metal oxide particle and a compound represented by the following formula (1) on a support; and
drying the coat by heating to form an undercoat layer,

wherein R 1 to R 8 each independently represents a hydrogen atom, an alkyl group, a hydroxy group, an amino group, or a carboxyl group.

9. A method for producing an electrophotographic photosensitive member including an undercoat layer which comprises a metal oxide particle and is formed on a support, a charge generating layer formed on the undercoat layer, and a charge transporting layer formed on the charge generating layer, the method comprising:
forming a coat of a charge generating layer coating solution containing a charge generating substance and a compound represented by the following formula (1) on an undercoat layer; and
drying the coat by heating to form a charge generating layer,

wherein R 1 to R 8 each independently represents a hydrogen atom, an alkyl group, a hydroxy group, an amino group, or a carboxyl group.

10. A process cartridge detachably attachable to a main body of an electrophotographic apparatus, wherein the process cartridge integrally supports:
an electrophotographic photosensitive member, and
at least one device selected from the group consisting of a charging device, a developing device, a transferring device, and a cleaning device,

wherein the electrophotographic photosensitive member comprises:
a support;
an undercoat layer which comprises a metal oxide particle and is formed on the support;
a charge generating layer formed on the undercoat layer; and
a charge transporting layer formed on the charge generating layer,
wherein either or both of the undercoat layer and the charge generating layer comprise a compound represented by the following formula (1),

wherein R 1 to R 8 each independently represents a hydrogen atom, an alkyl group, a hydroxy group, an amino group, or a carboxyl group.

11. An electrophotographic apparatus comprising:
an electrophotographic photosensitive member;
a charging device;
an exposure device;
a developing device; and
a transferring device, and

wherein the electrophotographic photosensitive member comprises:
a support;

an undercoat layer which comprises a metal oxide particle and is formed on the support;
a charge generating layer formed on the undercoat layer; and
a charge transporting layer formed on the charge generating layer,
wherein either or both of the undercoat layer and the charge generating layer comprise a compound represented by the following formula (1),

wherein R 1 to R 8 each independently represents a hydrogen atom, an alkyl group, a hydroxy group, an amino group, or a carboxyl group.

Assignees

• Canon Kk

Inventors

• Tokimitsu Ryoichi
• Ishiduka Yuka
• Kitamura Wataru
• Murakami Mai
• Tanabe Kan

Classifications

• G03G5/144 Primary

  comprising inorganic material · CPC title

• G03G5/0517

  comprising one or more cyclic groups consisting of carbon-atoms only · CPC title