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US 12,687,794 B2Granted
Electrophotographic photosensitive member, process cartridge, electrophotographic apparatus, and method of producing electrophotographic photosensitive member
AssigneeCanon Kabushiki Kaisha
InventorsMasashi Nishi, Akihiro Maruyama, Michiyo Sekiya, Nanami Kato
Life of this patent
Estimating the term…
Abstract
An electrophotographic photosensitive member that shows stable sensitivity even when repeatedly used. The electrophotographic photosensitive member is an electrophotographic photosensitive member including a support, an undercoat layer, a charge generating layer, and a charge transporting layer in the stated order, wherein the undercoat layer contains two kinds of electron transporting substances.
Claims6
An electrophotographic photosensitive member comprising:
- a support;
- an undercoat layer formed on the support;
- and
- a photosensitive layer formed on the undercoat layer, wherein the undercoat layer comprises a polymer of a composition comprising:
- a compound represented by the following formula (1);
- a compound represented by the following formula (2);
- and
- a compound represented by the following formula (5), and
- a crosslinking agent having a group capable of being bonded to one of a hydroxy group or a carboxyl group:
- in the formulae (1), (2), and (5), R1 and R2 are not identical to each other, and are each represented by the following formula (10), and
- in the formulae (1), (2), and (5), each X is identical, and each X represents a tetravalent structures represented by the following formula (X1):
- in the formula (10), Ra represents a branched or linear alkylene group having 1 or more and 10 or less carbon atoms that optionally has a substituent, or a phenylene group that optionally has a substituent,
- in the formula (10), Rb represents —O—, —S—, or a group represented by the following formula (11):
- in the formula (11), Rd represents a hydrogen atom, or a branched or linear alkyl group having 1 or more and 4 or less carbon atoms, and
- in the formula (10), Rc represents a hydrogen atom, a branched or linear alkyl group having 1 or more and 10 or less carbon atoms that optionally has a substituent, an aryl group having 6 or more and 14 or less carbon atoms that optionally has a substituent, or a branched or linear arylalkyl group having 7 or more and 18 or less carbon atoms that optionally has a substituent,
- in a case that the alkylene group or the alkyl group has a substituent, the substituent is a hydroxy group, a carboxyl group, an amino group, a thiol group, an alkoxy group having 1 or more and 3 or less carbon atoms, or an alkoxycarbonyl group having 2 or more and 4 or less carbon atoms,
- in a case that the phenylene group, the aryl group, or the arylalkyl group has a substituent, the substituent is an alkyl group having 1 or more and 3 or less carbon atoms, a hydroxy group, a hydroxyalkyl group having 1 or more and 3 or less carbon atoms, a carboxyl group, an amino group, a thiol group, an alkoxy group having 1 or more and 3 or less carbon atoms, an alkoxycarbonyl group having 2 or more and 4 or less carbon atoms, a halogen atom, a cyano group, or a nitro group,
- m represents 0 or 1, and n represents 0 or l, and
- R1 contains a hydroxy group or a carboxyl group, and
- R2 contains a hydroxy group or a carboxyl group:
- in the formula (X1), R11 to R18 each independently represent a hydrogen atom, a halogen atom, a cyano group, or a nitro group.
18 more elements
A method of producing an electrophotographic photosensitive member comprising:
- a support,
- an undercoat layer formed on the support, and
- a photosensitive layer formed on the undercoat layer, the method comprising:
- forming a coating film of a coating liquid for an undercoat layer comprising:
- a compound represented by the formula (1),
- a compound represented by the formula (2), and
- a crosslinking agent having a group capable of being bonded to one of a hydroxy group or a carboxyl group;
- and
- polymerizing the coating film to form the undercoat layer:
- in the formulae (1), (2), and (5), R1 and R2 are not identical to each other, and are each represented by the following formula (10), and
- in the formulae (1), (2), and (5), each X is identical, and each X represents a tetravalent structures represented by the following formula (X1):
- in the formula (10), Ra represents a branched or linear alkylene group having 1 or more and 10 or less carbon atoms that optionally has a substituent, or a phenylene group that optionally has a substituent,
- in the formula (10), Rb represents —O—, —S—, or a group represented by the following formula (11):
- in the formula (11), Rd represents a hydrogen atom, or a branched or linear alkyl group having 1 or more and 4 or less carbon atoms, and
- in the formula (10), Rc represents a hydrogen atom, a branched or linear alkyl group having 1 or more and 10 or less carbon atoms that may have a substituent, an aryl group having 6 or more and 14 or less carbon atoms that optionally has a substituent, or a branched or linear arylalkyl group having 7 or more and 18 or less carbon atoms that optionally has a substituent,
- in a case that the alkylene group or the alkyl group has a substituent, the substituent is a hydroxy group, a carboxyl group, an amino group, a thiol group, an alkoxy group having 1 or more and 3 or less carbon atoms, or an alkoxycarbonyl group having 2 or more and 4 or less carbon atoms,
- in a case that the phenylene group, the aryl group, or the arylalkyl group has a substituent, the substituent is an alkyl group having 1 or more and 3 or less carbon atoms, a hydroxy group, a hydroxyalkyl group having 1 or more and 3 or less carbon atoms, a carboxyl group, an amino group, a thiol group, an alkoxy group having 1 or more and 3 or less carbon atoms, an alkoxycarbonyl group having 2 or more and 4 or less carbon atoms, a halogen atom, a cyano group, or a nitro group,
- m represents 0 or 1, and n represents 0 or l, and
- R1 contains a hydroxy group or a carboxyl group, and
- R2 contains a hydroxy group or a carboxyl group:
- in the formulae (X1), R11 to R18 each independently represent a hydrogen atom, a halogen atom, a cyano group, or a nitro group.
18 more elements
Dependencies are inferred from the claim text.