Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus
AssigneeCanon Kabushiki Kaisha
InventorsMasashi Nishi, Kunihiko Sekido, Michiyo Sekiya, Kei Tagami, Isao Kawata, Yuto Ito, Akihito Saitoh
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Abstract
The present invention provides an electrophotographic photosensitive member that allows positive ghost to be reduced even in repeated use. The electrophotographic photosensitive member of the present invention is an electrophotographic photosensitive member wherein an undercoat layer contains a polymerization product of a composition including a compound represented by the following formula (1).
Claims8
An electrophotographic photosensitive member comprising a support and an undercoat layer formed on the support, wherein
- the undercoat layer comprises a polymerization product of a composition comprising a compound that has a structure represented by formula (1) and that has a polarizability per unit volume according to a density functional approach (B3LYP/6-31+G**), of 0.533 to 0.594:
- where R1 and R2 each independently represent a substituted or unsubstituted alkyl group, a group derived by replacing at least one CH2 in a main chain of a substituted or unsubstituted alkyl group with an oxygen atom, a group derived by replacing at least one CH2 in a main chain of a substituted or unsubstituted alkyl group with NR3, a group derived by replacing at least one C2H4 in a main chain of a substituted or unsubstituted alkyl group with COO, or a substituted or unsubstituted aryl group;
- R3 represents a hydrogen atom or an alkyl group, with the proviso that R1 or R2 represents two or more functional groups selected from the group consisting of hydroxy group and carboxyl group, and R1 and R2 in combination have at least two hydroxyl groups.
A process cartridge that integrally supports an electrophotographic photosensitive member, and at least one unit selected from the group consisting of a charging unit, a developing unit, a transfer unit and a cleaning unit, and that is detachable from a main body of an electrophotographic apparatus, wherein
- the electrophotographic photosensitive member comprises
- a support and an undercoat layer formed on the support, and
- the undercoat layer comprises a polymerization product of a composition comprising a compound that has a structure represented by formula (1) and that has a polarizability per unit volume according to a density functional approach (B3LYP/6-31+G**), of 0.533 to 0.594:
- where R1 and R2 each independently represent a substituted or unsubstituted alkyl group, a group derived by replacing at least one CH2 in a main chain of a substituted or unsubstituted alkyl group with an oxygen atom, a group derived by replacing at least one CH2 in a main chain of a substituted or unsubstituted alkyl group with NR3, a group derived by replacing at least one C2H4 in a main chain of a substituted or unsubstituted alkyl group with COO, or a substituted or unsubstituted aryl group;
- R3 represents a hydrogen atom or an alkyl group, with the proviso that R1 or R2 represents two or more functional groups selected from the group consisting of hydroxy group and carboxyl group, and R1 and R2 in combination have at least two hydroxyl groups.
An electrophotographic apparatus comprising an electrophotographic photosensitive member, a charging unit, an exposure unit, a developing unit and a transfer unit, wherein
- the electrophotographic photosensitive member comprises
- a support and an undercoat layer formed on the support, and
- the undercoat layer comprises a polymerization product of a composition comprising a compound that has a structure represented by formula (1) and that has a polarizability per unit volume according to a density functional approach (B3LYP/6-31+G**), of 0.533 to 0.594:
- where R1 and R2 each independently represent a substituted or unsubstituted alkyl group, a group derived by replacing at least one CH2 in a main chain of a substituted or unsubstituted alkyl group with an oxygen atom, a group derived by replacing at least one CH2 in a main chain of a substituted or unsubstituted alkyl group with NR3, a group derived by replacing at least one C2H4 in a main chain of a substituted or unsubstituted alkyl group with COO, or a substituted or unsubstituted aryl group;
- R3 represents a hydrogen atom or an alkyl group, with the proviso that R1 or R2 represents two or more functional groups selected from the group consisting of hydroxy group and carboxyl group, and R1 and R2 in combination have at least two hydroxyl groups.
Dependencies are inferred from the claim text.