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US 2014/0154618 A1Published application
Electrophotographic photosensitive member, method for producing electrophotographic photosensitive member, process cartridge and electrophotographic apparatus
AssigneeCanon Kabushiki Kaisha
InventorsAkihiro Maruyama, Harunobu Ogaki, Yuki Yamamoto
Life of this patent
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Abstract
A charge-transporting layer of an electrophotographic photosensitive member contains a charge-transporting substance, a resin A having a specific structural unit and a resin C having a specific structural unit as resins, and a compound D having a specific structural unit, and the charge-transporting layer contains domains containing the resin A1, the resin A2 and the compound D in a matrix containing the charge-transporting substance and the resin C.
Claims10
An electrophotographic photosensitive member comprising:
- a support;
- a charge-generating layer formed on the support;
- and
- a charge-transporting layer formed on the charge-generating layer;
- wherein the charge-transporting layer is a surface layer of the electrophotographic photosensitive member, and
- the charge-transporting layer has a matrix-domain structure having:
- a domain which comprises:
- a compound D having a structural unit represented by the following formula (O-1) and a structural unit represented by the following formula (O-2);
- and
- at least one resin selected from the group consisting of:
- a resin A1 having a structural unit represented by the following formula (A-1) and a structural unit represented by the following formula (B), and
- a resin A2 having a structural unit represented by the following formula (A-2) and a structural unit represented by the following formula (B);
- and
- a matrix which comprises:
- a resin C having a structural unit represented by the following formula (C);
- and
- a charge-transporting substance;
- wherein
- a content of the structural unit represented by the formula (A-1) and the structural unit represented by the formula (A-2) is from 10% by mass to 40% by mass based on the total mass of the resin A1 and the resin A2,
- where,
- m11 represents 0 or 1,
- X11 represents an ortho-phenylene group, a meta-phenylene group, a para-phenylene group, a bivalent group having two para-phenylene groups bonded with a methylene group, or a bivalent group having two para-phenylene groups bonded with an oxygen atom,
- Z11 and Z12 each independently represents an alkylene group having 1 to 4 carbon atoms,
- R11 to R14 each independently represents an alkyl group having 1 to 4 carbon atoms, or a phenyl group, and
- n11 represents the repetition number of a structure within brackets, and an average of n11 in the resin A1 ranges from 20 to 150,
- where,
- m21 represents 0 or 1,
- X21 represents an ortho-phenylene group, a meta-phenylene group, a para-phenylene group, a bivalent group having two para-phenylene groups bonded with a methylene group, or a bivalent group having two para-phenylene groups bonded with an oxygen atom,
- Z21 to Z23 each independently represents an alkylene group having 1 to 4 carbon atoms,
- R16 to R27 each independently represents an alkyl group having 1 to 4 carbon atoms, or a phenyl group, and
- n21, n22 and n23 each independently represents the repetition number of a structure within brackets, an average of n21 in the resin A2 ranges from 1 to 10, an average of n22 in the resin A2 ranges from 1 to 10, and an average of n23 in the resin A2 ranges from 20 to 200,
- where,
- m31 represents 0 or 1,
- X31 represents an ortho-phenylene group, a meta-phenylene group, a para-phenylene group, a bivalent group having two para-phenylene groups bonded with a methylene group, or a bivalent group having two para-phenylene groups bonded with an oxygen atom,
- Y31 represents a single bond, a methylene group, an ethylidene group, a propylidene group, a cyclohexylidene group, a phenylmethylene group, a phenylethylidene group or an oxygen atom, and
- R31 to R38 each independently represents a hydrogen atom or a methyl group,
- where,
- m41 represents 0 or 1,
- X41 represents an ortho-phenylene group, a meta-phenylene group, a para-phenylene group, a bivalent group having two para-phenylene groups bonded with a methylene group, or a bivalent group having two para-phenylene groups bonded with an oxygen atom,
- Y41 represents a single bond, a methylene group, an ethylidene group, a propylidene group, a cyclohexylidene group, a phenylmethylene group, a phenylethylidene group or an oxygen atom, and
- R41 to R48 each independently represents a hydrogen atom or a methyl group,
- where,
- R64 represents a hydrogen atom or a methyl group,
- R62 represents a phenyl group, a cyano group, a carbamoyl group, or a group represented by the formula —COOR64, where R64 represents a hydrogen atom, a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, an isobutyl group, a 2-ethylhexyl group, a nonyl group, an isononyl group, a cyclohexyl group, a 2-methoxyethyl group or a 2-hydroxyethyl group,
- R63 represents a hydrogen atom or a methyl group, and
- n61 represents the repetition number of a structure within brackets, and an average of n61 in the compound D ranges from 1 to 500.
43 more elements
A method for producing an electrophotographic photosensitive member comprising a support, a charge-generating layer formed on the support, and a charge-transporting layer formed on the charge-generating layer, the charge-transporting layer being a surface layer of the electrophotographic photosensitive member, the method comprising:
- preparing a charge-transporting layer coating solution containing:
- at least one resin selected from the group consisting of:
- a resin A1 having a structural unit represented by the following formula (A-1) and a structural unit represented by the following formula (B);
- and
- a resin A2 having a structural unit represented by the following formula (A-2) and a structural unit represented by the following formula (B);
- a compound D having a structural unit represented by the following formula (O-1) and a structural unit represented by the following formula (O-2);
- a resin C having a structural unit represented by the following formula (C);
- and
- a charge-transporting substance;
- and
- forming the charge-transporting layer by forming a coating film of the charge-transporting layer coating solution and drying the coating film,
- wherein a content of the structural unit represented by the formula (A-1) and the structural unit represented by the formula (A-2) is from 10% by mass to 40% by mass based on a total mass of the resin A1 and the resin A2,
- where,
- m11 represents 0 or 1,
- X11 represents an ortho-phenylene group, a meta-phenylene group, a para-phenylene group, a bivalent group having two para-phenylene groups bonded with a methylene group, or a bivalent group having two para-phenylene groups bonded with an oxygen atom,
- Z11 and Z12 each independently represents an alkylene group having 1 to 4 carbon atoms,
- R11 to R14 each independently represents an alkyl group having 1 to 4 carbon atoms, or a phenyl group, and
- n11 represents the repetition number of a structure within brackets, and an average of n11 in the resin A1 ranges from 20 to 150,
- where,
- m21 represents 0 or 1,
- X21 represents an ortho-phenylene group, a meta-phenylene group, a para-phenylene group, a bivalent group having two para-phenylene groups bonded with a methylene group, or a bivalent group having two para-phenylene groups bonded with an oxygen atom,
- Z21 to Z23 each independently represents an alkylene group having 1 to 4 carbon atoms,
- R16 to R27 each independently represents an alkyl group having 1 to 4 carbon atoms, or a phenyl group, and
- n21, n22 and n23 each independently represents the repetition number of a structure within brackets, an average of n21 in the resin A2 ranges from 1 to 10, an average of n22 in the resin A2 ranges from 1 to 10, and an average of n23 in the resin A2 ranges from 20 to 200,
- where,
- m31 represents 0 or 1,
- X31 represents an ortho-phenylene group, a meta-phenylene group, a para-phenylene group, a bivalent group having two para-phenylene groups bonded with a methylene group, or a bivalent group having two para-phenylene groups bonded with an oxygen atom,
- Y31 represents a single bond, a methylene group, an ethylidene group, a propylidene group, a cyclohexylidene group, a phenylmethylene group, a phenylethylidene group or an oxygen atom, and
- R31 to R38 each independently represents a hydrogen atom or a methyl group,
- where,
- m41 represents 0 or 1,
- X41 represents an ortho-phenylene group, a meta-phenylene group, a para-phenylene group, a bivalent group having two para-phenylene groups bonded with a methylene group, or a bivalent group having two para-phenylene groups bonded with an oxygen atom,
- Y41 represents a single bond, a methylene group, an ethylidene group, a propylidene group, a cyclohexylidene group, a phenylmethylene group, a phenylethylidene group or an oxygen atom, and
- R41 to R48 each independently represents a hydrogen atom or a methyl group,
- where,
- R61 represents a hydrogen atom or a methyl group,
- R62 represents a phenyl group, a cyano group, a carbamoyl group, or a group represented by the formula —COOR64, where R64 represents a hydrogen atom, a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, an isobutyl group, a 2-ethylhexyl group, a nonyl group, an isononyl group, a cyclohexyl group, a 2-methoxyethyl group or a 2-hydroxyethyl group,
- R63 represents a hydrogen atom or a methyl group, and
- n61 represents the repetition number of a structure within brackets, and an average of n61 in the compound D ranges from 1 to 500.
36 more elements
Dependencies are inferred from the claim text.