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US 2016/0116853 A1Published application
Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus
AssigneeCanon Kabushiki Kaisha
InventorsMichiyo Sekiya, Kunihiko Sekido, Kei Tagami, Masashi Nishi
Life of this patent
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Abstract
Provided is an electrophotographic photosensitive member including a laminated body, the laminated body including a support, an undercoat layer, and a charge generating layer, the undercoat layer including a polymerized product of a composition including an electron transport material represented by the following formula (1), a cross-linking agent, and a thermoplastic resin having a polymerizable functional group, the laminated body satisfying the following expressions (2) and (3). Z1—X—Z2 (1) 0.20≦|Vd2−Vd1|≦2.0 (2) τ≦10 (3)
Claims25
An electrophotographic photosensitive member, comprising:
- a laminated body;
- and
- a hole transporting layer on the laminated body,
- wherein:
- the laminated body comprises:
- a support;
- an undercoat layer having a thickness of d1 (μm), on the support;
- and
- a charge generating layer having a thickness of d2 (μm), on the undercoat layer;
- the hole transporting layer has a thickness of 15 μm or less;
- the undercoat layer comprises a polymerized product of a composition including an electron transport material represented by the following formula (1), a cross-linking agent, and a thermoplastic resin having a polymerizable functional group:
- Z1—X—Z2 (1)
- in the formula (1):
- Z1 and Z2 each represent a group having an electron transport property;
- X represents a linking group, and the linking group is a substituted or unsubstituted alkylene group, a substituted or unsubstituted arylene group, a substituted or unsubstituted heterocyclic group, or a group derived by substituting one of methylene groups in a main chain of the substituted or unsubstituted alkylene group with R1, the R1 representing an oxygen atom, a sulfur atom, SO2, NR2, CO, or a substituted or unsubstituted arylene group, the R2 representing a hydrogen atom, an alkyl group, or an aryl group;
- and
- at least one of Z1, Z2, and X has a polymerizable functional group, and the polymerizable functional group is a hydroxyl group, a thiol group, an amino group, a carboxyl group, or a methoxy group;
- the laminated body satisfies the following expressions (2) and (4):
- 0.20≦|Vd2−Vd1|≦2.0 (2)
- Vd1=−100×(d1+d2) (4)
- in which Vd1 represents a potential of a surface of the charge generating layer after 1.0 second from charging of the charge generating layer by corona charging, and Vd2 represents a potential of the surface of the charge generating layer after 0.80 second from the charging of the charge generating layer by the corona charging;
- and
- τ satisfies the following expression (3):
- τ≦10 (3)
- in the expression (3), τ represents transit time (ms) determined based on a time change rate of the potential of the surface of the charge generating layer after the surface of the charge generating layer which has a potential of Vd1 (V) is exposed to light, the light having an intensity adjusted so that the potential of the surface of the charge generating layer after 0.04 second from the exposure decays by 20% with respect to Vd1 (V).
22 more elements
An electrophotographic photosensitive member, comprising:
- a support;
- an undercoat layer on the support;
- and
- a photosensitive layer on the undercoat layer,
- wherein the undercoat layer comprises a polymerized product of one of the following (i) and (ii):
- (i):
- a polymerized product of a compound represented by the following formula (11);
- and
- (ii):
- a polymerized product of a composition containing the compound represented by the formula (11) and a cross-linking agent:
- in the formula (11),
- X1 and X2 each independently represent a residue obtained by removing four carboxyl groups from a substituted or unsubstituted aromatic tetracarboxylic acid, and when the residue has a substituent, the substituent comprises is a halogen atom, a cyano group, a nitro group, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group;
- Y represents a substituted or unsubstituted alkylene group having a polymerizable functional group or a substituted or unsubstituted arylene group having a polymerizable functional group;
- and
- R7 and R8 each independently represent a substituted or unsubstituted alkyl group, a group derived by substituting one of methylene groups of the substituted or unsubstituted alkyl group with an oxygen atom, a group derived by substituting one of the methylene groups of the substituted or unsubstituted alkyl group with a sulfur atom, a group derived by substituting one of the methylene groups of the substituted or unsubstituted alkyl group with NR9, a substituted or unsubstituted aryl group, a substituted or unsubstituted heterocyclic group, or an alkoxycarbonyl group, and R7 and R8 may each independently have a polymerizable functional group,
- provided that the oxygen atom, the sulfur atom, and the NR9 are free from being directly bonded to nitrogen atoms to which R7 and R8 are bonded.
13 more elements
A process cartridge, comprising:
- an electrophotographic photosensitive member;
- and
- at least one unit selected from the group consisting of a charging unit, a developing unit, and a cleaning unit,
- the process cartridge integrally supporting the electrophotographic photosensitive member and the at least one unit,
- the process cartridge being removably mounted onto an electrophotographic apparatus,
- wherein:
- the electrophotographic photosensitive member comprises:
- a laminated body;
- and
- a hole transporting layer on the laminated body;
- the laminated body comprises:
- a support;
- an undercoat layer having a thickness of d1 (μm), on the support;
- and
- a charge generating layer having a thickness of d2 (μm), on the undercoat layer;
- the hole transporting layer has a thickness of 15 μm or less;
- the undercoat layer comprises a polymerized product of a composition including an electron transport material represented by the following formula (1), a cross-linking agent, and a thermoplastic resin having a polymerizable functional group:
- Z1—X—Z2 (1)
- in the formula (1):
- Z1 and Z2 each represent a group having an electron transport property;
- X represents a linking group, and the linking group is a substituted or unsubstituted alkylene group, a substituted or unsubstituted arylene group, a substituted or unsubstituted heterocyclic group, or a group derived by substituting one of methylene groups in a main chain of the substituted or unsubstituted alkylene group with R1, the R1 representing an oxygen atom, a sulfur atom, SO2, NR2, CO, or a substituted or unsubstituted arylene group, the R2 representing a hydrogen atom, an alkyl group, or an aryl group;
- and
- at least one of Z1, Z2, and X has a polymerizable functional group, and the polymerizable functional group is a hydroxyl group, a thiol group, an amino group, a carboxyl group, or a methoxy group;
- the laminated body satisfies the following expressions (2) and (4):
- 0.20≦|Vd2−Vd1|≦2.0 (2)
- Vd1=−100×(d1+d2) (4)
- in which Vd1 represents a potential of a surface of the charge generating layer after 1.0 second from charging of the charge generating layer by corona charging, and Vd2 represents a potential of the surface of the charge generating layer after 0.80 second from the charging of the charge generating layer by the corona charging;
- and
- τ satisfies the following expression (3):
- τ≦10 (3)
- in the expression (3), τ represents transit time (ms) determined based on a time change rate of the potential of the surface of the charge generating layer after the surface of the charge generating layer which has a potential of Vd1 (V) is exposed to light, the light having an intensity adjusted so that the potential of the surface of the charge generating layer after 0.04 second from the exposure decays by 20% with respect to Vd1 (V).
28 more elements
An electrophotographic apparatus, comprising:
- an electrophotographic photosensitive member;
- an exposing unit;
- a charging unit;
- a developing unit;
- and
- a transferring unit,
- wherein:
- the electrophotographic photosensitive member comprises:
- a laminated body;
- and
- a hole transporting layer on the laminated body;
- the laminated body comprises:
- a support;
- an undercoat layer having a thickness of d1 (μm), on the support;
- and
- a charge generating layer having a thickness of d2 (μm), on the undercoat layer;
- the hole transporting layer has a thickness of 15 μm or less;
- the undercoat layer comprises a polymerized product of a composition including an electron transport material represented by the following formula (1), a cross-linking agent, and a thermoplastic resin having a polymerizable functional group:
- Z1—X—Z2 (1)
- in the formula (1):
- Z1 and Z2 each represent a group having an electron transport property;
- X represents a linking group, and the linking group is a substituted or unsubstituted alkylene group, a substituted or unsubstituted arylene group, a substituted or unsubstituted heterocyclic group, or a group derived by substituting one of methylene groups in a main chain of the substituted or unsubstituted alkylene group with R1, the R1 representing an oxygen atom, a sulfur atom, SO2, NR2, CO, or a substituted or unsubstituted arylene group, the R2 representing a hydrogen atom, an alkyl group, or an aryl group;
- and
- at least one of Z1, Z2, and X has a polymerizable functional group, and the polymerizable functional group is a hydroxyl group, a thiol group, an amino group, a carboxyl group, or a methoxy group;
- the laminated body satisfies the following expressions (2) and (4):
- 0.20≦|Vd2−Vd1|≦2.0 (2)
- Vd1=−100×(d1+d2) (4)
- in which Vd1 represents a potential of a surface of the charge generating layer after 1.0 second from charging of the charge generating layer by corona charging, and Vd2 represents a potential of the surface of the charge generating layer after 0.80 second from the charging of the charge generating layer by the corona charging;
- and
- τ satisfies the following expression (3):
- τ≦10 (3)
- in the expression (3), τ represents transit time (ms) determined based on a time change rate of the potential of the surface of the charge generating layer after the surface of the charge generating layer which has a potential of Vd1 (V) is exposed to light, the light having an intensity adjusted so that the potential of the surface of the charge generating layer after 0.04 second from the exposure decays by 20% with respect to Vd1 (V).
29 more elements
A process cartridge, comprising:
- an electrophotographic photosensitive member;
- and
- at least one unit selected from the group consisting of a charging unit, a developing unit, and a cleaning unit,
- the process cartridge integrally supporting the electrophotographic photosensitive member and the at least one unit, and
- the process cartridge being removably mounted onto an electrophotographic apparatus,
- wherein:
- the electrophotographic photosensitive member, comprising:
- a support;
- an undercoat layer on the support;
- and
- a photosensitive layer on the undercoat layer,
- wherein the undercoat layer comprises a polymerized product of one of the following (i) and (ii):
- (i):
- a polymerized product of a compound represented by the following formula (11);
- and
- (ii):
- a polymerized product of a composition containing the compound represented by the formula (11) and a cross-linking agent:
- in the formula (11),
- X1 and X2 each independently represent a residue obtained by removing four carboxyl groups from a substituted or unsubstituted aromatic tetracarboxylic acid, and when the residue has a substituent, the substituent comprises is a halogen atom, a cyano group, a nitro group, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group;
- Y represents a substituted or unsubstituted alkylene group having a polymerizable functional group or a substituted or unsubstituted arylene group having a polymerizable functional group;
- and
- R7 and R8 each independently represent a substituted or unsubstituted alkyl group, a group derived by substituting one of methylene groups of the substituted or unsubstituted alkyl group with an oxygen atom, a group derived by substituting one of the methylene groups of the substituted or unsubstituted alkyl group with a sulfur atom, a group derived by substituting one of the methylene groups of the substituted or unsubstituted alkyl group with NR9, a substituted or unsubstituted aryl group, a substituted or unsubstituted heterocyclic group, or an alkoxycarbonyl group, and R7 and R8 may each independently have a polymerizable functional group,
- provided that the oxygen atom, the sulfur atom, and the NR9 are free from being directly bonded to nitrogen atoms to which R7 and R8 are bonded.
20 more elements
An electrophotographic apparatus, comprising:
- an electrophotographic photosensitive member;
- an exposing unit;
- a charging unit;
- a developing unit;
- and
- a transferring unit
- wherein:
- the electrophotographic photosensitive member, comprising:
- a support;
- an undercoat layer on the support;
- and
- a photosensitive layer on the undercoat layer,
- wherein the undercoat layer comprises a polymerized product of one of the following (i) and (ii):
- (i):
- a polymerized product of a compound represented by the following formula (11);
- and
- (ii):
- a polymerized product of a composition containing the compound represented by the formula (11) and a cross-linking agent:
- in the formula (11),
- X1 and X2 each independently represent a residue obtained by removing four carboxyl groups from a substituted or unsubstituted aromatic tetracarboxylic acid, and when the residue has a substituent, the substituent comprises is a halogen atom, a cyano group, a nitro group, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group;
- Y represents a substituted or unsubstituted alkylene group having a polymerizable functional group or a substituted or unsubstituted arylene group having a polymerizable functional group;
- and
- R7 and R8 each independently represent a substituted or unsubstituted alkyl group, a group derived by substituting one of methylene groups of the substituted or unsubstituted alkyl group with an oxygen atom, a group derived by substituting one of the methylene groups of the substituted or unsubstituted alkyl group with a sulfur atom, a group derived by substituting one of the methylene groups of the substituted or unsubstituted alkyl group with NR9, a substituted or unsubstituted aryl group, a substituted or unsubstituted heterocyclic group, or an alkoxycarbonyl group, and R7 and R8 may each independently have a polymerizable functional group,
- provided that the oxygen atom, the sulfur atom, and the NR9 are free from being directly bonded to nitrogen atoms to which R7 and R8 are bonded.
21 more elements
Dependencies are inferred from the claim text.