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

• US 9,811,012 B2
• Filed: 09/15/2016
• Issued: 11/07/2017
• Est. Priority Date: 09/24/2015
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Murakami, Mai, Tokimitsu, Ryoichi, Kitamura, Wataru
• Primary Examiner(s): LE, HOA VAN
• Application Number:
  US15/265,995
• Publication Number:
  US 20170090309A1
• Time in Patent Office: 418 Days
• CPC Class Codes: G03G 5/144 comprising inorganic material

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.

Claims

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);

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 R⁶ to R¹⁰ are hydroxy groups.

4. The electrophotographic photosensitive member according to claim 1, wherein the (γ

) comprises a compound represented by the formula (2) wherein A¹ 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);

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);

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);

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.