Electrophotographic photosensitive member, method for producing electrophotographic photosensitive member, process cartridge and electrophotographic apparatus
First Claim
Patent Images
1. 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, andthe charge-transporting layer has a matrix-domain structure having;
a domain which comprises;
a silicone oil having a structural unit represented by the following formula (O-1), and at least one group selected from the group consisting of an alkyl group having 2 to 30 carbon atoms, a polyether group, an aralkyl group, an epoxy group, and an allyl group; 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), anda 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;
whereina 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,
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Abstract
A charge-transporting layer of an electrophotographic photosensitive member has a matrix-domain structure having a domain which comprises at least one resin selected from the group consisting of a resin A1 a resin A2 and a specific silicone oil, and a matrix which comprises resin 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.
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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 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 silicone oil having a structural unit represented by the following formula (O-1), and at least one group selected from the group consisting of an alkyl group having 2 to 30 carbon atoms, a polyether group, an aralkyl group, an epoxy group, and an allyl group; 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, - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. 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:
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preparing a charge-transporting layer coating solution containing; a silicone oil having a structural unit represented by the following formula (O-1), and at least one group selected from the group consisting of an alkyl group having 2 to 30 carbon atoms, a polyether group, an aralkyl group, an epoxy group, and an allyl group; 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 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,
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Specification