# US 2014/0154620 A1 · Electrophotographic photosensitive member, method of producing electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus

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- Number: US 2014/0154620 A1
- Document ID: US20140154620A1
- Status: Published application
- Kind: A1
- Application number: 14/091,139
- Filed: 2013-11-26
- Published: 2014-06-05
- Earliest claimed: 2012-11-30
- Assignees: Canon Kabushiki Kaisha
- Applicants: Canon Kabushiki Kaisha
- Inventors: Yota Ito; Michiyo Sekiya; Kunihiko Sekido; Atsushi Okuda; Nobuhiro Nakamura; Kazunori Noguchi; Daisuke Tanaka; Kazumichi Sugiyama; Yuka Ishiduka
- Web page: https://patentgrep.com/patent/US20140154620A1

## CPC

- G03G 5/047: characterised by the charge-generation layers or charge transport layers {(G03G5/0433 and G03G5/0436 take precedence)}
- G03G 5/0609: {containing oxygen}
- G03G 5/0612: {containing nitrogen}
- G03G 5/065: {containing three relevant rings}
- G03G 5/0651: {containing four relevant rings}
- G03G 5/0657: {containing seven relevant rings}
- G03G 5/142: {Inert intermediate layers}
- G03G 5/144: {comprising inorganic material}
- G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY

## Abstract

An electrophotographic photosensitive member includes a support, an undercoat layer formed on the support, and a photosensitive layer formed on the undercoat layer. The undercoat layer is an electron transporting layer and contains a metal salt of organic acid having at least one metal element selected from Fe, Co, Ni, Cu, and Zn.

## Claims

### Claim 1

An electrophotographic photosensitive member comprising:
a support;
an undercoat layer formed on the support; and
a photosensitive layer formed on the undercoat layer, wherein
the undercoat layer is an electron transporting layer, and
the undercoat layer comprises a metal salt of organic acid having at least one metal element selected from the group consisting of Fe, Co, Ni, Cu, and Zn.

### Claim 2 (depends on 1)

The electrophotographic photosensitive member according to claim 1, wherein the organic acid of the metal salt of organic acid is a monovalent carboxylic acid.

### Claim 3 (depends on 2)

The electrophotographic photosensitive member according to claim 2, wherein the monovalent carboxylic acid is a fatty acid.

### Claim 4 (depends on 3)

The electrophotographic photosensitive member according to claim 3, wherein the fatty acid has 4 to 8 carbon atoms.

### Claim 5 (depends on 1)

The electrophotographic photosensitive member according to claim 1, wherein the metal salt of organic acid has at least one metal element selected from the group consisting of Ni and Zn.

### Claim 6 (depends on 1)

The electrophotographic photosensitive member according to claim 1, wherein the content of the metal salt of organic acid in the undercoat layer is 0.1% by mass or more and 5% by mass or less relative to the total mass of the undercoat layer.

### Claim 7 (depends on 1)

The electrophotographic photosensitive member according to claim 1, wherein the undercoat layer does not contain metal oxide particles.

### Claim 8 (depends on 1)

The electrophotographic photosensitive member according to claim 1, wherein the electron transporting layer is a cured layer obtained by curing
an electron transporting compound having a polymerizable functional group, or
a composition containing an electron transporting compound having a polymerizable functional group.

### Claim 9 (depends on 8)

The electrophotographic photosensitive member according to claim 8, wherein the composition further contains a cross-linking agent and a resin having a polymerizable functional group.

### Claim 10 (depends on 1)

The electrophotographic photosensitive member according to claim 1, wherein the electron transporting layer contains an electron transporting compound.

### Claim 11 (depends on 10)

The electrophotographic photosensitive member according to claim 10, wherein the electron transporting compound is a pigment.

### Claim 12 (depends on 1)

A process cartridge detachably attached to an electrophotographic apparatus, wherein the process cartridge integrally supports:
the electrophotographic photosensitive member according to claim 1, and
at least one device selected from the group consisting of a charging device, a developing device, a transferring device, and a cleaning device.

### Claim 13 (depends on 1)

An electrophotographic apparatus comprising:
the electrophotographic photosensitive member according to claim 1;
a charging device;
an exposure device;
a developing device; and
a transferring device.

### Claim 14

A method of producing an electrophotographic photosensitive member which comprises:
a support;
an undercoat layer formed on the support; and
a photosensitive layer formed on the undercoat layer;
the method comprising the steps of:
preparing an undercoat layer coating liquid comprising a metal salt of organic acid having at least one metal element selected from the group consisting of Fe, Co, Ni, Cu, and Zn;
forming a coat of the undercoat layer coating liquid; and
drying the coat to form the undercoat layer;
wherein the undercoat layer is an electron transporting layer.

### Claim 15 (depends on 14)

The method according to claim 14, wherein the undercoat layer coating liquid does not contain metal oxide particles.