Electrophotographic photosensitive member

Patent metadata

Field	Value
Publication number	US-9448496-B2
Application number	US-201514719911-A
Country	US
Kind code	B2
Filing date	May 22, 2015
Priority date	May 23, 2014
Publication date	Sep 20, 2016
Grant date	Sep 20, 2016

Abstract

An electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer. The photosensitive layer includes a charge generating layer and a charge transport layer located on the charge generating layer. The charge transport layer contains a pigment that is absorptive with respect to a wavelength of exposed light. The pigment is a metal phthalocyanine pigment represented by General Formula (I) or a metal-free phthalocyanine pigment represented by General Formula (II), where X represents a sulfur atom or an oxygen atom. R 1 represents an aryl group or an alkyl group. R 2 -R 4 each represent a hydrogen atom, an alkyl group, an aryl group, an alkoxy group, a phenoxy group, an alkylthio group, a phenylthio group, or a dialkylamino group. M represents a metal atom. Y represents non-substitution or an alkyl group, an alkoxy group, an aryloxy group, a halogen atom, an oxygen atom, or a hydroxyl group.

First claim

What is claimed is:

1. An electrophotographic photosensitive member comprising:
a conductive substrate; and
a photosensitive layer located either directly or indirectly on the conductive substrate, wherein
the photosensitive layer contains at least a charge generating material, a charge transport material, and a binder resin,
the photosensitive layer includes a charge generating layer and a charge transport layer located on the charge generating layer,
the charge transport layer contains a pigment that is absorptive with respect to a wavelength of exposed light, and
the pigment is a metal phthalocyanine pigment represented by General Formula (I) or a metal-free phthalocyanine pigment represented by General Formula (II),

where, in the General Formulae (I) and (II), X represents a sulfur atom or an oxygen atom, R 1 represents an optionally substituted aryl group or an alkyl group, R 2 to R 4 each represent, independently of one another, a hydrogen atom, an optionally substituted alkyl group, an aryl group, an alkoxy group, an optionally substituted phenoxy group, an alkylthio group, an optionally substituted phenylthio group, or a dialkylamino group, and in the General Formula (I), M represents a metal atom, and Y represents non-substitution or represents an optionally substituted alkyl group, an alkoxy group, an aryloxy group, a halogen atom, an oxygen atom, or a hydroxyl group.

2. The electrophotographic photosensitive member according to claim 1 , wherein
the charge transport layer has a transmittance of at least more than 5% and less than 80% with respect to the wavelength of exposed light.

3. The electrophotographic photosensitive member according to claim 1 , wherein
the charge generating material contains titanyl phthalocyanine that exhibits a major peak at a Bragg angle 2θ of 27.2° with respect to characteristic X-rays of CuKα having a wavelength of 1.541 Å.

4. The electrophotographic photosensitive member according to claim 1 , wherein
the charge transport material is a compound represented by General Formula (III), General Formula (W), or General Formula (V),

where, in the General Formula (III), R 1 and R 3 to R 7 each represent, independently of one another, a hydrogen atom, an alkyl group having a carbon number of at least 1 and no greater than 8, an optionally substituted phenyl group, or an alkoxy group, R 2 represents an alkyl group having a carbon number of at least 1 and no greater than 8, an optionally substituted phenyl group, or an alkoxy group, members of R 3 to R 7 that are bonded to adjacent carbon atoms in a benzene ring are optionally bonded to one another to form a ring, and a represents an integer of at least 0 and no greater than 5,

in the General Formula (IV), R 1 and R 3 to R 7 each represent, independently of one another, a hydrogen atom, an alkyl group having a carbon number of at least 1 and no greater than 8, or a phenyl group, R 2 and R 8 each represent, independently of one another, an alkyl group having a carbon number of at least 1 and no greater than 8 or a phenyl group, a represents an integer of at least 0 and no greater than 5, b represents an integer of at least 0 and no greater than 4, and k represents 0 or 1, and

in the General Formula (V), Ra, Rb, and Rc each represent, independently of one another, an alkyl group having a carbon number of at least 1 and no greater than 8, a phenyl group, or an alkoxy group, k represents an integer of at least 0 and no greater than 4, and m and n each represent, independently of one another, an integer of at least 0 and no greater than 5.

Assignees

• Kyocera Document Solutions Inc

Inventors

• Azuma Jun
• Maruo Keiji
• Okawa Kensuke
• Ogata Akihiko

Classifications

• G03G5/047 Primary

  characterised by the charge-generation layers or charge transport layers {(G03G5/0433 and G03G5/0436 take precedence)} · CPC title

• G03G5/0696

  Phthalocyanines · CPC title

• G03G5/0672

  containing two or more methine or polymethine groups · CPC title

• G03G5/0614

  Amines · CPC title

• G03G5/06147

  alkenylarylamine · CPC title