Electrophotographic photoreceptor, method of producing electrophotographic photoreceptor, and apparatus of forming electrophotographic image

Patent metadata

Field	Value
Publication number	US-2018024450-A1
Application number	US-201715635949-A
Country	US
Kind code	A1
Filing date	Jun 28, 2017
Priority date	Jul 22, 2016
Publication date	Jan 25, 2018
Grant date	—

Abstract

Provided is an electrophotographic photoreceptor including a conductive support, a photosensitive layer, and a surface protective layer disposed in sequence. The surface protective layer includes a cured product of a composition containing a polymerizable compound, a charge transporting material, and at least two polymerization initiators. The polymerization initiators include an acyl phosphine oxide and an O-acyl oxime.

First claim

What is claimed is:

1 . An electrophotographic photoreceptor comprising a conductive support, a photosensitive layer, and a surface protective layer disposed in sequence, wherein
the surface protective layer comprises a cured product of a composition containing a polymerizable compound, a charge transporting material, and at least two polymerization initiators; and the polymerization initiators comprise an acyl phosphine oxide and an O-acyl oxime.

2 . The electrophotographic photoreceptor according to claim 1 , wherein the O-acyl oxime has a structure represented by Formula (1):

where R 1 and R 2 each represent a moiety selected from the group consisting of a hydrogen atom, an alkyl group having one to six carbon atoms and optionally having a substituent, a cycloalkyl group having three to six carbon atoms and optionally having a substituent, and an aryl group optionally having a substituent; and R 3 represents a moiety selected from the group consisting of a hydrogen atom, a halogen atom, a cyano group, a nitro group, a hydroxy group, an alkyl group having one to six carbon atoms and optionally having a substituent, an alkoxy group having one to six carbon atoms and optionally having a substituent, an aryl group optionally having a substituent, and a carbonyl group optionally having a substituent.

3 . The electrophotographic photoreceptor according to claim 1 , wherein, when amounts of the acyl phosphine oxide and the O-acyl oxime are respectively expressed as A and B, a ratio A:B is within a range of 3:7 to 8:2.

4 . The electrophotographic photoreceptor according to claim 1 , wherein the charge transporting material exhibits a maximum absorption wavelength of 405±50 nm in an absorption spectrum.

5 . The electrophotographic photoreceptor according to claim 1 , wherein the surface protective layer contains metal oxide particles.

6 . The electrophotographic photoreceptor according to claim 5 , wherein the metal oxide particles have a reactive organic group.

7 . A method of producing an electrophotographic photoreceptor comprising a conductive support, a photosensitive layer, and a surface protective layer disposed in sequence, the method comprising forming the surface protective layer by curing a composition containing a polymerizable compound, a charge transporting material, and at least two polymerization initiators, wherein the polymerization initiators comprise an acyl phosphine oxide and an O-acyl oxime.

8 . The method of producing an electrophotographic photoreceptor according to claim 7 , wherein the O-acyl oxime has a structure represented by Formula (1):

where R 1 and R 2 each represent a moiety selected from the group consisting of a hydrogen atom, an alkyl group having one to six carbon atoms and optionally having a substituent, a cycloalkyl group having three to six carbon atoms and optionally having a substituent, and an aryl group optionally having a substituent; and R 3 represents a moiety selected from the group consisting of a hydrogen atom, a halogen atom, a cyano group, a nitro group, a hydroxy group, an alkyl group having one to six carbon atoms and optionally having a substituent, an alkoxy group having one to six carbon atoms and optionally having a substituent, an aryl group optionally having a substituent, and a carbonyl group optionally having a substituent.

9 . The method of producing an electrophotographic photoreceptor according to claim 7 , wherein, when amounts of the acyl phosphine oxide and the O-acyl oxime are respectively expressed as A and B, a ratio A:B is within a range of 3:7 to 8:2.

10 . The method of producing an electrophotographic photoreceptor according to claim 7 , wherein the charge transporting material exhibits a maximum absorption wavelength of 405±50 nm in an absorption spectrum.

11 . The method of producing an electrophotographic photoreceptor according to claim 7 , wherein the surface protective layer contains metal oxide particles.

12 . The method of producing an electrophotographic photoreceptor according to claim 11 , wherein the metal oxide particles have a reactive organic group.

13 . An apparatus of forming an electrophotographic image, the apparatus comprising an electrophotographic photoreceptor, a charging unit to charge the electrophotographic photoreceptor, an exposing unit, a developing unit, and a transferring unit, wherein
the electrophotographic photoreceptor is the electrophotographic photoreceptor according to claim 1 .

Assignees

• Konica Minolta Inc

Inventors

• Ueda Mari
• Fujita Toshiyuki
• Horiguchi Haruo

Classifications

• 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

• G03G15/75

  Details relating to xerographic drum, band or plate, e.g. replacing, testing (electrographic recording members per se G03G5/00) · CPC title

• G03G5/0525

  Coating methods · CPC title

• G03G5/0564

  Polycarbonates · CPC title

• G03G5/0542 Primary

  Polyvinylalcohol, polyallylalcohol; Derivatives thereof, e.g. polyvinylesters, polyvinylethers, polyvinylamines · CPC title