Process for producing electrophotographic photosensitive member

Patent metadata

Field	Value
Publication number	US-9280072-B2
Application number	US-201414295989-A
Country	US
Kind code	B2
Filing date	Jun 4, 2014
Priority date	Jun 19, 2013
Publication date	Mar 8, 2016
Grant date	Mar 8, 2016

Abstract

Provided is a process for producing an electrophotographic photosensitive member, the process including the steps of: preparing a dispersion liquid by dispersing particles each containing an electron transporting substance in an aqueous dispersion medium; forming the coat of the dispersion liquid on the support; and forming an undercoat layer by heating the coat at a temperature equal to or more than the melting point of the electron transporting substance.

First claim

What is claimed is:

1. A process for producing an electrophotographic photosensitive member including an electrically conductive support, an undercoat layer formed on the support, a charge generating layer formed on the undercoat layer, and a hole transporting layer formed on the charge generating layer, the process comprising:
preparing one of dispersion liquids described in the following (i) and the following (ii), for the undercoat layer:
(i) a dispersion liquid obtained by dispersing particles each containing an electron transporting substance, and particles each containing at least one of a resin or a crosslinking agent in the aqueous dispersion medium, and
(ii) a dispersion liquid obtained by dispersing particles each containing the electron transporting substance and at least one of the resin or the crosslinking agent in the aqueous dispersion medium;

forming a coat of the dispersion liquid on the support; and
forming the undercoat layer by heating the coat at a temperature equal to or more than a melting point of the electron transporting substance,
wherein at least one of the resin or the crosslinking agent is soluble in a molten product of the electron transporting substance at the temperature at which the coat is heated.

2. A process for producing an electrophotographic photosensitive member according to claim 1 , wherein the resin comprises at least one selected from the group consisting of a polyamide resin, a butyral resin, and an acetal resin.

3. A process for producing an electrophotographic photosensitive member according to claim 1 , wherein the crosslinking agent comprises at least one selected from the group consisting of an isocyanate compound and a blocked isocyanate compound.

4. A process for producing an electrophotographic photosensitive member according to claim 1 , wherein a content of water in the aqueous dispersion medium is 30 mass % or more with respect to a total mass of the aqueous dispersion medium.

5. A process for producing an electrophotographic photosensitive member according to claim 4 , wherein the aqueous dispersion medium further contains at least one selected from the group consisting of methanol and ethanol.

6. A process for producing an electrophotographic photosensitive member according to claim 5 , wherein a total content of the content of the water and a content of at least one selected from the group consisting of the methanol and the ethanol in the aqueous dispersion medium is 60 mass % or more with respect to the total mass of the aqueous dispersion medium.

7. A process for producing an electrophotographic photosensitive member according to claim 6 , wherein the total content of the content of the water and a content of at least one selected from the group consisting of the methanol and the ethanol in the aqueous dispersion medium is 100 mass % with respect to the total mass of the aqueous dispersion medium.

8. A process for producing an electrophotographic photosensitive member according to claim 1 , wherein the electron transporting substance comprises at least one selected from the group consisting of an imide compound and a quinone compound.

9. A process for producing an electrophotographic photosensitive member according to claim 1 , wherein the temperature at which the coat is heated is 200° C. or less.

Assignees

• Canon Kk

Inventors

• Ogaki Harunobu
• Okuda Atsushi
• Sekido Kunihiko

Classifications

• G03G5/0525

  Coating methods · CPC title

• G03G5/144

  comprising inorganic material · CPC title

• G03G5/14 Primary

  Inert intermediate or cover layers for charge-receiving layers (for photoconductive, charge-generation or charge-transporting layers G03G5/04) · CPC title

• G03G5/142

  Inert intermediate layers · CPC title