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

• US 20150185635A1
• Filed: 12/12/2014
• Published: 07/02/2015
• Est. Priority Date: 12/26/2013
• Status: Active Grant

• Current Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Original Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Inventors: Noguchi, Kazunori, Ishiduka, Yuka, Nakamura, Nobuhiro, Okuda, Atsushi, Tomono, Hiroyuki
• Granted Patent: US 9,304,416 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G03G 5/14 Inert intermediate or cover layers for charge-receiving layers G03G5/04 takes precedence
• CPC Class Codes: G03G 5/142 Inert intermediate layers

Abstract

Provided is an electrophotographic photosensitive member, including: a support; an undercoat layer formed on the support; and a photosensitive layer formed on the undercoat layer, in which the undercoat layer includes a cured product of a composition including (i) an isocyanate compound having a structure represented by the following specific formula (1), (ii) at least one resin selected from a polyvinyl acetal and an acrylic polyol; and (iii) a compound represented by any one of the specific formulae (A1) to (A8).

Claims

1. An electrophotographic photosensitive member, comprising:

a support;

an undercoat layer formed on the support; and

a photosensitive layer formed on the undercoat layer,

wherein the undercoat layer comprises a cured product of a composition comprising

(i) an isocyanate compound represented by the following formula (1),

(ii) at least one resin selected from the group consisting of a polyvinyl acetal and an acrylic polyol, and

(iii) a compound represented by any one of the following formulae (A1) to (A8);

2. An electrophotographic photosensitive member according to claim 1, wherein the undercoat layer satisfies the following expression (8):

0.4≦

(iii)/(i)+(ii)≦

1.0  

 

(8)

in the expression (8), (i), (ii), and (iii) represent contents of the compounds (i), (ii), and (iii) with respect to a total mass of the composition, respectively.

3. An electrophotographic photosensitive member according to claim 1, wherein R¹ and R² in the formula (1) each independently represent a single bond, a methylene group, an ethylene group, or a propylene group.

4. An electrophotographic photosensitive member according to claim 1, wherein the polyvinyl acetal in the (ii) has a structural unit represented by the following formula (9), a structural unit represented by the following formula (10), and a structural unit represented by the following formula (11):

5. An electrophotographic photosensitive member according to claim 1, wherein the acrylic polyol in the (ii) comprises an acrylic resin that

is obtained by polymerizing a monomer component including an unsaturated monomer having a hydroxy group, and

has one of an acrylic unit and a methacrylic unit.

6. A process cartridge, comprising:

the electrophotographic photosensitive member according to claim 1; and

at least one unit selected from the group consisting of a charging unit, a developing unit, and a cleaning unit,

the process cartridge integrally supporting the electrophotographic photosensitive member and the at least one unit,

the process cartridge being removably mounted onto a main body of an electrophotographic apparatus.

7. An electrophotographic apparatus, comprising:

the electrophotographic photosensitive member according to claim 1;

a charging unit;

an exposing unit;

a developing unit; and

a transferring unit.

8. A method of producing an electrophotographic photosensitive member comprising:

a support;

an undercoat layer formed on the support; and

a photosensitive layer formed on the undercoat layer,

the method comprising the steps of;

preparing an application liquid for the undercoat layer, the application liquid comprising a composition comprising

(i) an isocyanate compound having a structure represented by the following formula (1),

(ii) at least one resin selected from the group consisting of a polyvinyl acetal and an acrylic polyol, and

(iii) a compound represented by any one of the following formulae (A1) to (A8); and

forming a coating film of the application liquid for the undercoat layer, followed by drying and curing of the coating film to form the undercoat layer;

9. A method of producing an electrophotographic photosensitive member according to claim 8, wherein the undercoat layer satisfies the following expression (8):

0.4≦

(iii)/(i)+(ii)≦

1.0  

 

(8)

in the expression (8), (i), (ii), and (iii) represent contents of the compounds (i), (ii), and (iii) with respect to a total mass of the composition, respectively.

10. A method of producing an electrophotographic photosensitive member according to claim 8, wherein R¹ and R² in the formula (1) each independently represent a single bond, a methylene group, an ethylene group, or a propylene group.