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US 2016/0238957 A1Published application
Electrophotographic photosensitive member, method of producing the electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus
AssigneeCanon Kabushiki Kaisha
InventorsAkihiro Maruyama, Harunobu Ogaki, Yuki Yamamoto
Life of this patent
Estimating the term…
Abstract
A charge-transporting layer as the surface layer of an electrophotographic photosensitive member contains a charge-transporting substance, and contains, as resins, a resin A having specific structural units and a polycarbonate resin D having specific structural units. The charge-transporting layer has, in a matrix containing the charge-transporting substance and the polycarbonate resin D, domains each containing the resin A.
Claims10
An electrophotographic photosensitive member, comprising:
- a support;
- a charge-generating layer on the support;
- and
- a charge-transporting layer on the charge-generating layer,
- wherein:
- the charge-transporting layer is a surface layer of the electrophotographic photosensitive member;
- the charge-transporting layer comprises a matrix-domain structure having:
- a domain which includes a resin A comprising:
- a structural unit represented by one of the following formulae (A-1) and (A-2);
- and
- a structural unit represented by the following formula (B);
- and
- a matrix which includes a charge-transporting substance and a polycarbonate resin D comprising:
- a structural unit represented by the following formula (D);
- and
- a structural unit represented by the following formula (E);
- a content of the structural unit represented by one of the formulae (A-1) and (A-2) in the resin A is from 5% by mass to 25% by mass based on a total mass of the resin A;
- a content of the structural unit represented by the formula (B) in the resin A is from 25% by mass to 95% by mass based on the total mass of the resin A;
- a content of the structural unit represented by the formula (D) in the polycarbonate resin D is from 10% by mass to 60% by mass based on a total mass of the polycarbonate resin D;
- and
- a content of the structural unit represented by the formula (E) in the polycarbonate resin D is from 40% by mass to 90% by mass based on the total mass of the polycarbonate resin D;
- in the formula (A-1):
- m11 represents 0 or 1;
- when m11 represents 1, X11 represents an o-phenylene group, a m-phenylene group, a p-phenylene group, a bivalent group having two p-phenylene groups bonded with a methylene group, or a bivalent group having two p-phenylene groups bonded with an oxygen atom;
- Z11 and Z12 each independently represent an alkylene group having 1 to 4 carbon atoms;
- R11 to R14 each independently represent an alkyl group having 1 to 4 carbon atoms, or a phenyl group;
- and
- n11 represents a number of repetitions of a structure within parentheses, and an average of n11 in the formula (A-1) ranges from 10 to 150;
- in the formula (A-2):
- m21 represents 0 or 1;
- when m21 represents 1, X21 represents an o-phenylene group, a m-phenylene group, a p-phenylene group, a bivalent group having two p-phenylene groups bonded with a methylene group, or a bivalent group having two p-phenylene groups bonded with an oxygen atom;
- Z21 to Z23 each independently represent an alkylene group having 1 to 4 carbon atoms;
- R16 to R27 each independently represent an alkyl group having 1 to 4 carbon atoms, or a phenyl group;
- and
- n21, n22, and n23 each independently represent a number of repetitions of a structure within parentheses, an average of n21 and an average of n22 in the formula (A-2) each range from 1 to 10, and an average of n23 in the formula (A-2) ranges from 10 to 200;
- in the formula (B):
- m22 represents 0 or 1;
- and
- when m22 represents 1, X22 represents an o-phenylene group, a m-phenylene group, a p-phenylene group, a bivalent group having two p-phenylene groups bonded with a methylene group, or a bivalent group having two p-phenylene groups bonded with an oxygen atom;
- in the formula (D):
- Y41 represents an oxygen atom or a sulfur atom;
- and
- R41 to R44 each independently represent a hydrogen atom or a methyl group;
- in the formula (E):
- Y51 represents a single bond, a methylene group, an ethylidene group, a propylidene group, a cyclohexylidene group, a phenylethylidene group, or a phenylmethylene group;
- and,
- R51 to R58 each independently represent a hydrogen atom or a methyl group.
44 more elements
A method of producing an electrophotographic photosensitive member comprising:
- a support;
- a charge-generating layer on the support;
- and
- a charge-transporting layer on the charge-generating layer,
- the charge-transporting layer being a surface layer of the electrophotographic photosensitive member,
- the method comprising:
- preparing an application liquid for a charge-transporting layer, the application liquid containing:
- a resin A comprising:
- a structural unit represented by one of the following formulae (A-1) and (A-2);
- and
- a structural unit represented by the following formula (B);
- a polycarbonate resin D comprising:
- a structural unit represented by the following formula (D);
- and
- a structural unit represented by the following formula (E);
- and
- a charge-transporting substance;
- and
- forming a coating film of the application liquid for a charge-transporting layer, followed by drying the coating film, to thereby form the charge-transporting layer,
- a content of the structural unit represented by one of the formulae (A-1) and (A-2) in the resin A being from 5% by mass to 25% by mass based on a total mass of the resin A,
- a content of the structural unit represented by the formula (B) in the resin A being from 25% by mass to 95% by mass based on the total mass of the resin A,
- a content of the structural unit represented by the formula (D) in the polycarbonate resin D being from 10% by mass to 60% by mass based on a total mass of the polycarbonate resin D,
- a content of the structural unit represented by the formula (E) in the polycarbonate resin D being from 40% by mass to 90% by mass based on the total mass of the polycarbonate resin D,
- in the formula (A-1):
- m11 represents 0 or 1;
- when m11 represents 1, X11 represents an o-phenylene group, a m-phenylene group, a p-phenylene group, a bivalent group having two p-phenylene groups bonded with a methylene group, or a bivalent group having two p-phenylene groups bonded with an oxygen atom;
- Z11 and Z12 each independently represent an alkylene group having 1 to 4 carbon atoms;
- R11 to R14 each independently represent an alkyl group having 1 to 4 carbon atoms, or a phenyl group;
- and
- n11 represents a number of repetitions of a structure within parentheses, and an average of n11 in the formula (A-1) ranges from 10 to 150;
- in the formula (A-2):
- m21 represents 0 or 1;
- when m21 represents 1, X21 represents an o-phenylene group, a m-phenylene group, a p-phenylene group, a bivalent group having two p-phenylene groups bonded with a methylene group, or a bivalent group having two p-phenylene groups bonded with an oxygen atom;
- Z21 to Z23 each independently represent an alkylene group having 1 to 4 carbon atoms;
- R16 to R27 each independently represent an alkyl group having 1 to 4 carbon atoms, or a phenyl group;
- and
- n21, n22, and n23 each independently represent a number of repetitions of a structure within parentheses, an average of n21 and an average of n22 in the formula (A-2) each range from 1 to 10, and an average of n23 in the formula (A-2) ranges from 10 to 200;
- in the formula (B):
- m22 represents 0 or 1;
- and
- when m22 represents 1, X22 represents an o-phenylene group, a m-phenylene group, a p-phenylene group, a bivalent group having two p-phenylene groups bonded with a methylene group, or a bivalent group having two p-phenylene groups bonded with an oxygen atom;
- in the formula (D):
- Y41 represents an oxygen atom or a sulfur atom;
- and
- R41 to R44 each independently represent a hydrogen atom or a methyl group;
- in the formula (E):
- Y51 represents a single bond, a methylene group, an ethylidene group, a propylidene group, a cyclohexylidene group, a phenylethylidene group, or a phenylmethylene group;
- and,
- R51 to R58 each independently represent a hydrogen atom or a methyl group.
46 more elements
Dependencies are inferred from the claim text.