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

Patent metadata

Field	Value
Publication number	US-9811012-B2
Application number	US-201615265995-A
Country	US
Kind code	B2
Filing date	Sep 15, 2016
Priority date	Sep 24, 2015
Publication date	Nov 7, 2017
Grant date	Nov 7, 2017

Abstract

The present invention provides an electrophotographic photosensitive member in which an undercoat layer contains a metal oxide particle, a particular benzophenone compound and a particular ketone compound, a process cartridge and an electrophotographic apparatus each including the electrophotographic photosensitive member and a process for producing the electrophotographic photosensitive member.

First claim

What is claimed is:

1. An electrophotographic photosensitive member comprising:
a support;
an undercoat layer on the support; and
a photosensitive layer on the undercoat layer, wherein
the undercoat layer comprises:
(α) a metal oxide particle;
(β) a compound represented by formula (1):

wherein R 1 to R 5 each independently represent a hydrogen atom, a halogen atom, an alkyl group having 1 or more and 6 or less carbon atoms, an alkoxy group having 1 or more and 8 or less carbon atoms, or an amino group, and R 6 to R 10 each independently represent a hydrogen atom, a hydroxy group, a halogen atom, an alkyl group having 1 or more and 6 or less carbon atoms, an alkoxy group having 1 or more and 8 or less carbon atoms, or an amino group, provided that 1 or 2 of R 6 to R 10 are hydroxy groups and there is not a case where 3 or more of R 6 to R 10 are hydroxy groups; and
(γ) a compound represented by formula (2):

wherein R 1 to R 5 each independently represent a hydrogen atom, a halogen atom, an alkyl group having 1 or more and 6 or less carbon atoms, an alkoxy group having 1 or more and 8 or less carbon atoms, or an amino group, and A 1 represents an alkenyl group having 2 or more and 4 or less carbon atoms.

2. The electrophotographic photosensitive member according to claim 1 , wherein the (α) comprises a zinc oxide particle.

3. The electrophotographic photosensitive member according to claim 1 , wherein the (β) comprises a compound represented by the formula (1) wherein 2 adjacent groups of R 6 to R 10 are hydroxy groups.

4. The electrophotographic photosensitive member according to claim 1 , wherein the (γ) comprises a compound represented by the formula (2) wherein A 1 is a 1-propenyl group.

5. A process cartridge integrally supporting:
an electrophotographic photosensitive member; and
at least one unit selected from the group consisting of a charging unit, a developing unit, a transferring unit and a cleaning unit, the process cartridge being detachably attachable to an electrophotographic apparatus main body, wherein
the electrophotographic photosensitive member comprises:
a support;
an undercoat layer on the support; and
a photosensitive layer on the undercoat layer, wherein
the undercoat layer comprises:
(α) a metal oxide particle;
(β) a compound represented by formula (1):

wherein R 1 to R 5 each independently represent a hydrogen atom, a halogen atom, an alkyl group having 1 or more and 6 or less carbon atoms, an alkoxy group having 1 or more and 8 or less carbon atoms, or an amino group, and R 6 to R 10 each independently represent a hydrogen atom, a hydroxy group, a halogen atom, an alkyl group having 1 or more and 6 or less carbon atoms, an alkoxy group having 1 or more and 8 or less carbon atoms, or an amino group, provided that 1 or 2 of R 6 to R 10 are hydroxy groups and there is not a case where 3 or more of R 6 to R 10 are hydroxy groups; and
(γ) a compound represented by formula (2):

wherein R 1 to R 5 each independently represent a hydrogen atom, a halogen atom, an alkyl group having 1 or more and 6 or less carbon atoms, an alkoxy group having 1 or more and 8 or less carbon atoms, or an amino group, and A 1 represents an alkenyl group having 2 or more and 4 or less carbon atoms.

6. An electrophotographic apparatus comprising:
an electrophotographic photosensitive member;
a charging unit;
an exposing unit;
a developing unit; and
a transferring unit, wherein
the electrophotographic photosensitive member comprises:
a support;
an undercoat layer on the support; and
a photosensitive layer on the undercoat layer, wherein
the undercoat layer comprises:
(α) a metal oxide particle;
(β) a compound represented by formula (1):

wherein R 1 to R 5 each independently represent a hydrogen atom, a halogen atom, an alkyl group having 1 or more and 6 or less carbon atoms, an alkoxy group having 1 or more and 8 or less carbon atoms, or an amino group, and R 6 to R 10 each independently represent a hydrogen atom, a hydroxy group, a halogen atom, an alkyl group having 1 or more and 6 or less carbon atoms, an alkoxy group having 1 or more and 8 or less carbon atoms, or an amino group, provided that 1 or 2 of R 6 to R 10 are hydroxy groups and there is not a case where 3 or more of R 6 to R 10 are hydroxy groups; and
(γ) a compound represented by formula (2):

wherein R 1 to R 5 each independently represent a hydrogen atom, a halogen atom, an alkyl group having 1 or more and 6 or less carbon atoms, an alkoxy group having 1 or more and 8 or less carbon atoms, or an amino group, and A 1 represents an alkenyl group having 2 or more and 4 or less carbon atoms.

7. A process for producing an electrophotographic photosensitive member, the process comprising:
forming an undercoat layer on a support; and
forming a photosensitive layer on the undercoat layer, wherein
forming the undercoat layer is coating the support with a coating liquid for an undercoat layer to form a coating film, the coating liquid comprising:
(α) a metal oxide particle;
(β) a compound represented by formula (1):

wherein R 1 to R 5 each independently represent a hydrogen atom, a halogen atom, an alkyl group having 1 or more and 6 or less carbon atoms, an alkoxy group having 1 or more and 8 or less carbon atoms, or an amino group, and R 6 to R 10 each independently represent a hydrogen atom, a hydroxy group, a halogen atom, an alkyl group having 1 or more and 6 or less carbon atoms, an alkoxy group having 1 or more and 8 or less carbon atoms, or an amino group, provided that 1 or 2 of R 6 to R 10 are hydroxy groups and there is not a case where 3 or more of R 6 to R 10 are hydroxy groups; and
(γ) a compound represented by formula (2):

wherein R 1 to R 5 each independently represent a hydrogen atom, a halogen atom, an alkyl group having 1 or more and 6 or less carbon atoms, an alkoxy group having 1 or more and 8 or less carbon atoms, or an amino group, and A 1 represents an alkenyl group having 2 or more and 4 or less carbon atoms, and drying and/or curing the coating film, thereby forming the undercoat layer.

8. The process for producing an electrophotographic photosensitive member according to claim 7 , wherein a content of the (β) in the coating liquid for an undercoat layer is 0.1% by mass or more and 4.0% by mass or less relative to a content of the (α) in the undercoat layer.

9. The process for producing an electrophotographic photosensitive member according to claim 7 , wherein a content of the (γ) in the coating liquid for an undercoat layer is 1.0% by mass or more and 15% by mass or less relative to a content of the (β) in the undercoat layer.

Assignees

• Canon Kk

Inventors

• Murakami Mai
• Tokimitsu Ryoichi
• Kitamura Wataru

Classifications

• G03G5/144 Primary

  comprising inorganic material · CPC title