Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus
First Claim
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1. An electrophotographic photosensitive member comprising in this order:
- a support;
an undercoat layer comprising a cured product of an electron transport material, a polyolefin resin and an isocyanate compound having two or more isocyanate groups;
a charge generation layer; and
a charge transport layer, whereinthe electron transport material has at least one member selected from the group consisting of a hydroxyl group, a thiol group, an amino group and a carboxyl group, andthe polyolefin resin has at least one member selected from the group consisting of a carboxyl group, an alkoxycarbonyl group and an anhydrous carboxylic acid structure and an optionally substituted phenyl group, the polyolefin resin having a structure represented by formula (B1) and a structure represented by formula (B2)
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Abstract
The present invention provides an electrophotographic photosensitive member in which a photosensitive layer has strong close adhesiveness even when used repeatedly, and a positive ghost is reduced. An undercoat layer of the electrophotographic photosensitive member contains a cured product of an electron transport material having a polymerizable functional group; a polyolefin resin having at least one group/structure selected from the group consisting of a carboxyl group, an alkoxycarbonyl group and an anhydrous carboxylic acid structure, and a substituted or unsubstituted phenyl group; and an isocyanate compound having two or more isocyanate groups.
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Citations
9 Claims
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1. An electrophotographic photosensitive member comprising in this order:
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a support; an undercoat layer comprising a cured product of an electron transport material, a polyolefin resin and an isocyanate compound having two or more isocyanate groups; a charge generation layer; and a charge transport layer, wherein the electron transport material has at least one member selected from the group consisting of a hydroxyl group, a thiol group, an amino group and a carboxyl group, and the polyolefin resin has at least one member selected from the group consisting of a carboxyl group, an alkoxycarbonyl group and an anhydrous carboxylic acid structure and an optionally substituted phenyl group, the polyolefin resin having a structure represented by formula (B1) and a structure represented by formula (B2) - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A process cartridge, comprising:
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an electrophotographic photosensitive member and at least one unit that is integrally supported being selected from the group consisting of a charging unit, a developing unit and a cleaning unit, said process cartridge being detachably attachable to an electrophotographic apparatus main body; and the electrophotographic photosensitive member comprising in this order a support, an undercoat layer, a charge generation layer and a charge transport layer, said undercoat layer comprising a cured product of an electron transport material, a polyolefin resin and an isocyanate compound having two or more isocyanate groups, wherein the electron transport material has at least one member selected from the group consisting of a hydroxyl group, a thiol group, an amino group and a carboxyl group, and the polyolefin resin has at least one member selected from the group consisting of a carboxyl group, an alkoxycarbonyl group and an anhydrous carboxylic acid structure and an optionally substituted phenyl group, the polyolefin resin having a structure represented by formula (B1) and a structure represented by formula (B2)
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9. An electrophotographic apparatus, comprising:
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an electrophotographic photosensitive member, a charging unit, an exposing unit, a developing unit and a transfer unit; the electrophotographic photosensitive member comprising in this order a support, an undercoat layer, a charge generation layer and a charge transport layer, said undercoat layer comprising a cured product of an electron transport material, a polyolefin resin and an isocyanate compound having two or more isocyanate groups, wherein the electron transport material has at least one member selected from the group consisting of a hydroxyl group, a thiol group, an amino group and a carboxyl group, and the polyolefin resin has at least one member selected from the group consisting of a carboxyl group, an alkoxycarbonyl group and an anhydrous carboxylic acid structure and an optionally substituted phenyl group, the polyolefin resin having a structure represented by formula (B1) and a structure represented by formula (B2)
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Specification