ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, ELECTROPHOTOGRAPHIC APPARATUS, AND METHOD OF MANUFACTURING ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER

• US 20130236823A1
• Filed: 11/25/2011
• Published: 09/12/2013
• Est. Priority Date: 12/02/2010
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Noguchi, Kazunori, Anezaki, Takashi, Shida, Kazuhisa, Okuda, Atsushi, Murai, Shio, Ogaki, Harunobu
• Granted Patent: US 8,980,509 B2
• Time in Patent Office: Days
• US Class Current: 430/56
• CPC Class Codes: G03G 15/75 Details relating to xerographic drum, band or plate, e.g. replacing, testing electrographic recording members per se G03G5/00
• CPC Class Codes: G03G 5/056 Polyesters
• CPC Class Codes: G03G 5/0564 Polycarbonates
• CPC Class Codes: G03G 5/0578 Polycondensates comprising silicon atoms in the main chain
• CPC Class Codes: G03G 5/0589 Macromolecular compounds characterised by specific side-chain substituents or end groups
• CPC Class Codes: G03G 5/061443 benzidine
• CPC Class Codes: G03G 5/06147 alkenylarylamine
• CPC Class Codes: G03G 5/061473 plural alkenyl groups linked directly to the same aryl group
• CPC Class Codes: G03G 5/06149 enamine
• CPC Class Codes: G03G 5/0629 containing one hetero atom
• CPC Class Codes: G03G 5/14752 Polyesters
• CPC Class Codes: G03G 5/14756 Polycarbonates
• CPC Class Codes: G03G 5/14773 Polycondensates comprising silicon atoms in the main chain

Abstract

An electrophotographic photosensitive member comprises a charge-transporting layer which is a surface layer of the electrophotographic photosensitive member; wherein the charge-transporting layer has a matrix-domain structure having: a matrix comprising a component β and a component γ, and a domain comprising a component α.

Claims

1. An electrophotographic photosensitive member, comprising:

a conductive support,

a charge-generating layer which is provided on the conductive support and comprises a charge-generating substance, and

a charge-transporting layer which is provided on the charge-generating layer and is a surface layer of the electrophotographic photosensitive member;

wherein the charge-transporting layer has a matrix-domain structure having;

a domain which comprises a polyester resin A having a repeating structural unit represented by the following formula (A) and a repeating structural unit represented by the following formula (B); and

a matrix which comprises,

at least one resin selected from the group consisting of a polycarbonate resin C having a repeating structural unit represented by the following formula (C) and a polyester resin D having a repeating structural unit represented by the following formula (D), and

at least one charge-transporting substance selected from the group consisting of a compound represented by the following formula (1), a compound represented by the following formula (1′

), a compound represented by the following formula (2), and a compound represented by the following formula (2′

);

wherein the content of a siloxane moiety in the polyester resin A is not less than 5.0% by mass and not more than 40% by mass relative to the total mass of the polyester resin A;

2. The electrophotographic photosensitive member according to claim 1,

wherein the content of the siloxane moiety in the charge-transporting layer is not less than 1% by mass and not more than 20% by mass relative to the total mass of whole resin in the charge-transporting layer.

3. A process cartridge detachably attachable to a main body of 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.

4. An electrophotographic apparatus, comprising:

the electrophotographic photosensitive member according to claim 1;

a charging device;

an exposing device;

a developing device; and

a transferring device.

5. A method of manufacturing the electrophotographic photosensitive member according to claim 1,

wherein the method comprises a step of forming the charge-transporting layer by applying a charge-transporting-layer coating solution on the charge-generating layer and drying the coating solution, and

wherein the charge-transporting-layer coating solution comprises:

the polyester resin A,

at least one resin selected from the group consisting of the polycarbonate resin C and the polyester resin D, and

at least one charge-transporting substance selected from the group consisting of the compound represented by the formula (1), the compound represented by the formula (1′

), the compound represented by the formula (2), and the compound represented by the formula (2′

).