Back to results
US 2025/0164902 A1Published application
Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus
AssigneeCanon Kabushiki Kaisha
InventorsMASASHI NISHI, TSUTOMU NISHIDA, AKIHIRO MARUYAMA, NORIFUMI MURANAKA
Life of this patent
Estimating the term…
Abstract
Provided is an electrophotographic photosensitive member including: a support; and a photosensitive layer. The photosensitive layer contains a binder resin, a charge generating material, an electron transporting material, and a hole transporting material. The binder resin contains a polyarylate resin having a particular structural unit. The hole transporting material contains a particular compound.
Claims15
An electrophotographic photosensitive member comprising:
- a support;
- and
- a photosensitive layer,
- wherein the photosensitive layer contains a binder resin, a charge generating material, an electron transporting material, and a hole transporting material,
- wherein the binder resin contains a polyarylate resin having a structural unit represented by the following formula (1), a structural unit represented by the following formula (2), a structural unit represented by the following formula (3), and a structural unit represented by the following formula (4):
- and
- wherein the hole transporting material contains a compound represented by the following formula (5):
- in the formula (5), R1, R2, R3 and R4 each independently represent an alkyl group having 1 or more and 4 or less carbon atoms, or an alkoxy group having 1 or more and 4 or less carbon atoms.
5 more elements
A process cartridge comprising:
- an electrophotographic photosensitive member;
- and at least one unit selected from the group consisting of:
- a charging unit;
- a developing unit;
- and a cleaning unit,
- the process cartridge integrally supporting the electrophotographic photosensitive member and the at least one unit, and being detachably attachable onto a main body of an electrophotographic apparatus,
- the electrophotographic photosensitive member comprising:
- a support;
- and
- a photosensitive layer,
- wherein the photosensitive layer contains a binder resin, a charge generating material, an electron transporting material, and a hole transporting material,
- wherein the binder resin contains a polyarylate resin having a structural unit represented by the following formula (1), a structural unit represented by the following formula (2), a structural unit represented by the following formula (3), and a structural unit represented by the following formula (4):
- and
- wherein the hole transporting material contains a compound represented by the following formula (5):
- in the formula (5), R1, R2, R3, and R4 each independently represent an alkyl group having 1 or more and 4 or less carbon atoms, or an alkoxy group having 1 or more and 4 or less carbon atoms.
12 more elements
An electrophotographic apparatus comprising:
- an electrophotographic photosensitive member;
- a charging unit;
- an exposing unit;
- a developing unit;
- and
- a transfer unit,
- the electrophotographic photosensitive member comprising:
- a support;
- and
- a photosensitive layer,
- wherein the photosensitive layer contains a binder resin, a charge generating material, an electron transporting material, and a hole transporting material,
- wherein the binder resin contains a polyarylate resin having a structural unit represented by the following formula (1), a structural unit represented by the following formula (2), a structural unit represented by the following formula (3), and a structural unit represented by the following formula (4):
- and
- wherein the hole transporting material contains a compound represented by the following formula (5):
- in the formula (5), R1, R2, R3, and R4 each independently represent an alkyl group having 1 or more and 4 or less carbon atoms, or an alkoxy group having 1 or more and 4 or less carbon atoms.
12 more elements
Dependencies are inferred from the claim text.