ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, METHOD OF PRODUCING THE ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS
First Claim
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1. 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;
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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.
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Citations
10 Claims
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1. An electrophotographic photosensitive member, comprising:
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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; - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of producing an electrophotographic photosensitive member comprising:
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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,
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Specification