US 9,983,490 B2Granted

Electrophotographic apparatus

AssigneeCanon Kabushiki Kaisha

InventorsTsuyoshi Shimada, Ryoichi Tokimitsu, Mai Murakami, Kan Tanabe, Wataru Kitamura, Haruhiko Mitsuda

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Abstract

The present invention provides an electrophotographic apparatus in which the deterioration of electrical properties in repetitive use is suppressed even in the case where an electrophotographic photosensitive member absorbs moisture under a high-temperature and high-humidity environment. An undercoat layer of the electrophotographic photosensitive member provided in the electrophotographic apparatus contains (α) a metal oxide particle, (β) a particular benzophenone compound and (γ) a compound represented by the following formula (2). wherein R11 to R15 each independently represent a hydrogen atom, a hydroxy group, a halogen atom, an alkyl group, an alkoxy group or an amino group and A1 represents an alkenyl group having 2 or more and 4 or less carbon atoms.

Claims12

Dependent claims

An electrophotographic apparatus comprising:

an electrophotographic photosensitive member;
a charging roller disposed so as to abut on the electrophotographic photosensitive member;
and
a charging unit charging the electrophotographic photosensitive member by applying only a direct-current voltage, wherein
the electrophotographic photosensitive member comprises:
a support;
a photosensitive layer;
and
an undercoat layer between the support and the photosensitive layer, the undercoat layer comprising:
(α) a metal oxide particle;
(β) a benzophenone compound represented by formula (1)
wherein R1 to R10 each independently represent a hydrogen atom, a hydroxy group, a halogen atom, an alkyl group, an alkoxy group or an amino group, provided that at least 3 of R1 to R10 is a hydroxy group;
and
(γ) a compound represented by formula (2)
wherein R11 to R15 each independently represent a hydrogen atom, a hydroxy group, a halogen atom, an alkyl group, an alkoxy group or an amino group and A1 represents an alkenyl group having 2 to 4 carbon atoms.

12 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/469,935Filed 27 Mar 2017
Priority: JP 2016-07165331 Mar 2016
Published: US 2017/0285499 A15 Oct 2017
Granted: 29 May 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

G03G 5/144
Inert intermediate layers: comprising inorganic material
G03G 5/0517
Organic non-macromolecular compounds: comprising one or more cyclic groups consisting of carbon-atoms only
G03G 5/14
Recording-members for original recording by exposure, e.g. to light, to heat or to electrons; Manufacture thereof; Selection of materials…
G03G 5/142
Inert intermediate or cover layers for charge-receiving layers: inert intermediate layers