Electrophotographic photoreceptor and electrophotographic image forming device

Patent metadata

Field	Value
Publication number	US-10324387-B2
Application number	US-201815948032-A
Country	US
Kind code	B2
Filing date	Apr 9, 2018
Priority date	Apr 25, 2017
Publication date	Jun 18, 2019
Grant date	Jun 18, 2019

Abstract

Provided is an electrophotographic photoreceptor obtained by laminating a photosensitive layer and a surface protective layer in this order on a conductive support, wherein the surface protective layer contains conductive fine particles and crosslinkable organic fine particles, and either the conductive fine particles or the crosslinkable organic fine particles have been subjected to surface modification with a fluoroalkyl (meth)acrylate/(meth)acrylic acid copolymer.

First claim

What is claimed is:

1. An electrophotographic photoreceptor obtained by laminating a photosensitive layer and a surface protective layer in this order on a conductive support, wherein
the surface protective layer contains conductive fine particles and crosslinkable organic fine particles,
either the conductive fine particles or the crosslinkable organic fine particles have been subjected to surface modification with a fluoroalkyl (meth)acrylate/(meth)acrylic acid copolymer, and
the fluoroalkyl (meth)acrylate/(meth)acrylic acid copolymer has both a structural unit represented by the following general formula (1a) and a structural unit represented by the following general formula (1b):

wherein, R 1 represents a hydrogen atom or a methyl group, R 2 represents a linear or branched alkyl group having 1 to 4 carbon atoms, X represents an alkylene group having 1 to 4 carbon atoms, and R 3 represents a perfluoroalkyl group having 1 to 5 carbon atoms.

2. The electrophotographic photoreceptor according to claim 1 , wherein the crosslinkable organic fine particles contain a compound having a melamine structure.

3. The electrophotographic photoreceptor according to claim 1 , wherein the conductive fine particles have a number average primary particle diameter in a range of 10 to 500 nm.

4. The electrophotographic photoreceptor according to claim 1 , wherein the conductive fine particles have been subjected to surface modification with a compound having an acryloyl group or a methacryloyl group and the fluoroalkyl (meth)acrylate/(meth)acrylic acid copolymer.

5. The electrophotographic photoreceptor according to claim 1 , wherein the conductive fine particles contain any one of titanium oxide, tin oxide, and copper aluminate.

6. The electrophotographic photoreceptor according to claim 1 , wherein the surface protective layer contains a binder resin, and the binder resin is a curable resin obtained by polymerizing a crosslinkable polymerizable compound having an acryloyl group or a methacryloyl group.

7. The electrophotographic photoreceptor according to claim 1 , wherein the conductive fine particles are composite fine particles obtained by attaching conductive metal oxide to a surface of a core material.

8. An electrophotographic image forming device comprising:
a charging roller; and
the electrophotographic photoreceptor according to claim 1 .

9. An electrophotographic photoreceptor obtained by laminating a photosensitive layer and a surface protective layer in this order on a conductive support, wherein
the surface protective layer contains conductive fine particles and crosslinkable organic fine particles,
either the conductive fine particles or the crosslinkable organic fine particles have been subjected to surface modification with a fluoroalkyl (meth)acrylate/(meth)acrylic acid copolymer, and
the surface protective layer further contains a binder resin, and the binder resin is a curable resin obtained by polymerizing a crosslinkable polymerizable compound having an acryloyl group or a methacryloyl group.

10. An electrophotographic image forming device comprising:
a charging roller; and
the electrophotographic photoreceptor according to claim 9 .

11. An electrophotographic photoreceptor obtained by laminating a photosensitive layer and a surface protective layer in this order on a conductive support, wherein
the surface protective layer contains conductive fine particles and crosslinkable organic fine particles,
either the conductive fine particles or the crosslinkable organic fine particles have been subjected to surface modification with a fluoroalkyl (meth)acrylate/(meth)acrylic acid copolymer, and
the conductive fine particles are composite fine particles obtained by attaching conductive metal oxide to a surface of a core material.

12. An electrophotographic image forming device comprising:
a charging roller; and
the electrophotographic photoreceptor according to claim 11 .

Assignees

• Konica Minolta Inc

Inventors

• Ishida Takeshi
• Maeda Seisuke
• Kuramochi Kazuhiro

Classifications

• G03G5/14704

  comprising inorganic material · CPC title

• G03G5/14726 Primary

  Halogenated polymers · CPC title

• G03G5/14734

  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 title

• G03G5/14791

  Macromolecular compounds characterised by their structure, e.g. block polymers, reticulated polymers, or by their chemical properties, e.g. by molecular weight or acidity · CPC title