METHOD FOR PRODUCING ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER

• US 20130029266A1
• Filed: 06/08/2012
• Published: 01/31/2013
• Est. Priority Date: 07/29/2011
• Status: Active Grant

• Current Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Original Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Inventors: Sugiyama, Kazumichi, Tanaka, Daisuke, Nishida, Tsutomu
• Granted Patent: US 8,632,935 B2
• Time in Patent Office: Days
• US Class Current: 430/133
• CPC Class Codes: G03G 5/0514 not comprising cyclic groups
• CPC Class Codes: G03G 5/0517 comprising one or more cyclic groups consisting of carbon-atoms only
• CPC Class Codes: G03G 5/0525 Coating methods
• 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 5/0592 Macromolecular compounds characterised by their structure or by their chemical properties, e.g. block polymers, reticulated polymers, molecular weight, acidity
• CPC Class Codes: G03G 5/078 comprising silicon atoms
• CPC Class Codes: G03G 5/14752 Polyesters
• CPC Class Codes: G03G 5/14756 Polycarbonates
• CPC Class Codes: G03G 5/14786 Macromolecular compounds characterised by specific side-chain substituents or end groups
• 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

Abstract

The present invention provides a method for producing an electrophotographic photosensitive member including a surface layer, the method including the steps of: forming a coat for the surface layer on the support by applying a surface-layer coating solution and forming the surface layer by drying the coat, wherein the surface-layer coating solution includes a resin α, a resin β, a solvent γ and a compound δ.

Claims

1. A method of producing an electrophotographic photosensitive member comprising a surface layer,

the method comprising the steps of:

forming a coat for the surface layer by using a surface-layer coating solution, and

forming the surface layer by drying the coat,

wherein the surface-layer coating solution comprises;

(α

) at least one resin selected from the group consisting of a polycarbonate resin not having a siloxane moiety at the end, and a polyester resin not having a siloxane moiety at the end,

(β

) at least one resin selected from the group consisting of a polycarbonate resin having a siloxane moiety at the end, a polyester resin having a siloxane moiety at the end, and an acrylate resin having a siloxane moiety at the end,

(γ

) at least one solvent selected from the group consisting of toluene and xylene, and

(δ

) a compound having the boiling point in one atmosphere higher than that of the (γ

), the compound being represented by the following formula (1), and

R¹⁰O-E-(R¹¹O)_q—

R¹² 

 

(1)

wherein, in the formula (1),

R¹⁰ represents a methyl group, an ethyl group, a propyl group, a cyclohexyl group, a phenyl group, or a benzyl group,

R¹¹ represents a methylene group, an ethylene group, or a propylene group,

R¹² represents a methyl group, an ethyl group, an acetyl group, a propionyl group, or a benzoyl group,

E represents a single bond or a carbonyl group,

q represents an integer number selected from 0 to 2.

2. The method of producing the electrophotographic photosensitive member according to claim 1,

wherein the above (δ

) is at least one selected from the group consisting of a methyl benzoate, an ethyl benzoate, a benzyl acetate, ethyl 3-Ethoxypropionate, and a diethylene glycol ethyl methyl ether.

3. The method of producing the electrophotographic photosensitive member according to claim 1,

wherein the content of the above (δ

) in the surface-layer coating solution is not less than 3% by mass and not more than 300% by mass relative to the total mass of the above (α

) and the above (β

), and

the content of the above (δ

) is not less than 0.5% by mass and not more than 150% by mass relative to the total mass of the above (γ

).

4. The method of producing the electrophotographic photosensitive member according to claim 3,

wherein the content of the above (δ

) in the surface-layer coating solution is not less than 5% by mass and not more than 80% by mass relative to the total mass of the above (α

) and the above (β

), and

the content of the above (δ

) is not less than 0.5% by mass and not more than 40% by mass relative to the total mass of the above (γ

).

5. The method of producing the electrophotographic photosensitive member according to claim 1,

wherein the content of the above (β

) in the surface-layer coating solution is not less than 0.1% by mass and not more than 50% by mass relative to the mass of the above (α

).

6. The method of producing the electrophotographic photosensitive member according to claim 1,

wherein the surface-layer coating solution further comprises:

(ε

) at least one of dimethoxymethane and tetrahydrofuran.

7. The method of producing the electrophotographic photosensitive member according to claim 6,

wherein the content of the above (γ

) is not less than 15% by mass and not more than 99% by mass relative to the total mass of the above (γ

), the above (δ

) and the above (ε

),

the content of the above (δ

) is not less than 0.5% by mass and not more than 35% by mass relative to the total mass of the above (γ

), the above (δ

) and the above (ε

), and

the content of the above (ε

) is not less than 0.1% by mass and not more than 65% by mass relative to the total mass of the above (γ

), the above (δ

) and the above (ε

).

8. The method of producing the electrophotographic photosensitive member according to claim 1,

wherein the polycarbonate resin not having a siloxane moiety at the end is a polycarbonate resin A having a repeating structural unit represented by the following formula (A),

9. The method of producing the electrophotographic photosensitive member according to claim 1,

wherein the polyester resin not having a siloxane moiety at the end is a polyester resin B having a repeating structural unit represented by the following formula (B),

10. The method of producing the electrophotographic photosensitive member according to claim 1,

wherein the polycarbonate resin having a siloxane moiety at the end is a polycarbonate resin D having a repeating structural unit represented by the following formula (A′

), and a end structure represented by the following formula (D),

11. The method of producing the electrophotographic photosensitive member according to claim 1,

wherein the polyester resin having a siloxane moiety at the end is a polyester resin E having a repeating structural unit represented by the following formula (B′

), and a end structure represented by the following formula (D),

12. The method of producing the electrophotographic photosensitive member according to claim 1,

wherein the acrylate resin having a siloxane moiety at the end is

a acrylate resin F having a repeating structural unit represented by the following formula (F-1) and a repeating structural unit represented by the following formula (F-2), or

a acrylate resin F having a repeating structural unit represented by the following formula (F-1) and a repeating structural unit represented by the following formula (F-3),

13. The method of producing the electrophotographic photosensitive member according to claim 1,

wherein the above (γ

) is xylene.