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

• US 20130202326A1
• Filed: 10/25/2011
• Published: 08/08/2013
• Est. Priority Date: 10/29/2010
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Shida, Kazuhisa, Okuda, Atsushi, Noguchi, Kazunori, Anezaki, Takashi, Ogaki, Harunobu, Murai, Shio
• Granted Patent: US 8,815,479 B2
• Time in Patent Office: Days
• US Class Current: 399/111
• CPC Class Codes: G03G 5/047 characterised by the charge-generation layers or charge transport layers G03G5/0433 and G03G5/0436 take precedence
• 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 5/14752 Polyesters
• CPC Class Codes: G03G 5/14756 Polycarbonates
• CPC Class Codes: G03G 5/14773 Polycondensates comprising silicon atoms in the main chain
• CPC Class Codes: G03G 5/14786 Macromolecular compounds characterised by specific side-chain substituents or end groups

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] (charge-transporting substances having specific structures), and a domain comprising a component [α](resin [α1], or resin [α1] and resin [α2]).

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 comprises a resin having a siloxane moiety at the end one or both ends, and has a matrix-domain structure having;

a domain which comprises the component α

; and

a matrix which comprises the component β and

the component γ

;

wherein the content of the component α

is not less than 60% by mass and not more than 100% by mass relative to the total mass of the resin having a siloxane moiety at the end one or both ends in the charge-transporting layer;

wherein the component α

consists of a resin α

1, or the resin α

1 and a resin α

2, and

the content of the resin α

1 is not less than 0.1% by mass and not more than 100% by mass relative to the total mass of the component α

;

wherein the resin α

1 is at least one resin selected from the group consisting of a resin having a structure represented by the following formula (B), and a resin having a structure represented by the following formula (C), and

the content of a siloxane moiety in the resin α

1 is not less than 5% by mass and not more than 30% by mass relative to the total mass of the resin α

1;

2. The electrophotographic photosensitive member according to claim 1,

wherein the content of the resin α

1 is not less than 1% by mass and not more than 50% by mass relative to the total mass of the component α

.

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 component α

, the component β and

the component γ

.

3. 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 consists of a component α

; and

a matrix which comprises the component β and

the component γ

;

wherein the component α

is a resin α

1, or the resin α

1 and a resin α

2, and

wherein the resin α

1 is at least one resin selected from the group consisting of a resin having a structure represented by the following formula (B), and a resin having a structure represented by the following formula (C), and

the content of a siloxane moiety in the resin α

1 is not less than 5% by mass and not more than 30% by mass relative to the total mass of the resin α

1;