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

• US 20120301181A1
• Filed: 08/18/2011
• Published: 11/29/2012
• Est. Priority Date: 09/14/2010
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Ogaki, Harunobu, Noguchi, Kazunori, Okuda, Atsushi, Murai, Shio, Shida, Kazuhisa, Anezaki, Takashi
• Granted Patent: US 8,753,789 B2
• Time in Patent Office: Days
• US Class Current: 399/111
• 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 5/0592 Macromolecular compounds characterised by their structure or by their chemical properties, e.g. block polymers, reticulated polymers, molecular weight, acidity
• CPC Class Codes: G03G 5/0596 Macromolecular compounds characterised by their physical properties
• 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 5/078 comprising silicon atoms
• CPC Class Codes: G03G 5/14756 Polycarbonates
• CPC Class Codes: G03G 5/14769 Other polycondensates comprising nitrogen atoms with or without oxygen atoms in the main chain
• CPC Class Codes: G03G 5/14773 Polycondensates comprising silicon atoms in the main chain
• CPC Class Codes: G03G 5/14791 Macromolecular compounds characterised by their structure, e.g. block polymers, reticulated polymers, or by their chemical properties, e.g. by molecular weight or acidity
• CPC Class Codes: G03G 5/14795 Macromolecular compounds characterised by their physical properties

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: at least one resin selected from the group consisting of a polycarbonate resin C and a polyester resin D; and at least one charge-transporting substance selected from the group consisting of a compound represented by the following formula (1) and a compound represented by the following formula (1′), and a domain comprising a polycarbonate resin A.

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 comprising a polycarbonate 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 comprising;

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) and a compound represented by the following formula (1′

);

wherein the content of a siloxane moiety in the polycarbonate resin A is not less than 5% by mass and not more than 40% by mass relative to the total mass of the polycarbonate 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 resins in the charge-transporting layer.

3. The electrophotographic photosensitive member according to claim 1,

wherein, in the formula (A), the average of “

c”

in the polycarbonate resin A ranges from 20 to 150.

4. 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.

5. 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.

6. 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 polycarbonate 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 following formula (1) and the compound represented by the following formula (1′

).