METHOD OF PRODUCING ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, AND EMULSION FOR A CHARGE TRANSPORTING LAYER

• US 20150056547A1
• Filed: 03/06/2013
• Published: 02/26/2015
• Est. Priority Date: 03/15/2012
• Status: Active Grant

• Current Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Original Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Inventors: Murakami, Takeshi, Maruyama, Akihiro, Uematsu, Hiroki, Ogaki, Harunobu, Okuda, Atsushi
• Granted Patent: US 9,436,107 B2
• Time in Patent Office: Days
• US Class Current: 430/70
• CPC Class Codes: G03G 5/05 Organic bonding materials; Methods for coating a substrate with a photoconductive layer; Inert supplements for use in photoconductive layers
• CPC Class Codes: G03G 5/051 Organic non-macromolecular compounds
• CPC Class Codes: G03G 5/0514 not comprising cyclic groups
• CPC Class Codes: G03G 5/0525 Coating methods
• CPC Class Codes: G03G 5/0535 Polyolefins; Polystyrenes; Waxes
• CPC Class Codes: G03G 5/0539 Halogenated polymers
• CPC Class Codes: G03G 5/0546 Polymers comprising at least one carboxyl radical, e.g. polyacrylic acid, polycrotonic acid, polymaleic acid; Derivatives thereof, e.g. their esters, salts, anhydrides, nitriles, amides
• 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 5/078 comprising silicon atoms

Abstract

A method of producing an electrophotographic photosensitive member includes: preparing a solution including a charge transporting substance, and at least one compound selected from the group consisting of a fluorine-atom-containing polyacrylate, a fluorine-atom-containing polymethacrylate, a polycarbonate having a siloxane bond, a polyester having a siloxane bond, a polystyrene having a siloxane bond, a silicone oil, a polyolefin, an aliphatic acid, an aliphatic acid amide and an aliphatic acid ester; preparing an emulsion by using the solution and water; forming a coat of the emulsion on a support; and heating the coat to form a charge transporting layer.

Claims

1. A method of producing an electrophotographic photosensitive member which comprises a support and a charge transporting layer formed thereon, comprising the steps of:

preparing a solution comprising;

a charge transporting layer; and

at least one of compound selected from the group consisting of a fluorine-atom-containing polyacrylate, a fluorine-atom-containing polymethacrylate, a polycarbonate having siloxane bond, a polyester having siloxane bond, a polystyrene having siloxane bond, a silicone oil, a polyolefin, an aliphatic acid, an aliphatic acid amide, and an aliphatic acid ester;

dispersing the solution in water to prepare emulsion,

forming a coat for the charge transporting layer by using the emulsion, and

heating the coat to form the charge transporting layer.

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

wherein the fluorine-atom-containing polyacrylate and the fluorine-atom-containing polymethacrylate are a compound represented by the following formula (1),

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

wherein the polycarbonate having siloxane bond is

a polycarbonate A comprising a repeating structural unit represented by the following formula (2-1) and a repeating structural unit represented by the following formula (2-3), or

a polycarbonate B comprising a repeating structural unit represented by the following formula (2-2) and a repeating structural unit represented by the following formula (2-3),

4. A method of producing the electrophotographic photosensitive member according to claim 1,

wherein the polyester having siloxane bond is a polyester C comprising a repeating structural unit represented by the following formula (3-1) and a repeating structural unit represented by the following formula (3-2),

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

wherein the polystyrene having siloxane bond is a polystyrene D comprising a repeating structural unit represented by the following formula (4-1) and a repeating structural unit represented by the following formula (4-2),

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

wherein the silicone oil is a compound represented by the following formula (5),

7. A method of producing the electrophotographic photosensitive member according to claim 1,

wherein the polyolefin is an aliphatic hydrocarbon having carbon atoms 10 to 40.

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

wherein the aliphatic acid, the aliphatic acid amide and the aliphatic acid ester is a compound represented by the following formula (7-1),

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

wherein, in the emulsion, the ratio of a mass of water to a mass of the solution is 5/5 to 7/3.

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

wherein the solution further comprises a binder resin, and the binder resin is a polycarbonate resin free from a siloxane bond or a polyester resin free from a siloxane bond.

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

wherein the solution further comprises a liquid whose solubility in water under 25°

C. and 1 atmosphere is 1.0 mass % or less.

12. An emulsion for a charge transporting layer in which a solution is dispersed in water,

wherein the solution comprises:

a charge transporting layer; and

at least one of compound selected from the group consisting of a fluorine-atom-containing polyacrylate, a fluorine-atom-containing polymethacrylate, a polycarbonate having siloxane bond, a polyester having siloxane bond, a polystyrene having siloxane bond, a silicone oil, a polyolefin, an aliphatic acid, an aliphatic acid amide and an aliphatic acid ester.

13. The emulsion for a charge transporting layer according to claim 12,

wherein the solution further comprises a liquid whose solubility in water under 25°

C. and 1 atmosphere is 1.0 mass % or less.