Electrophotographic photoconductor, image forming apparatus, and process cartridge

A process cartridge for an image forming apparatus, comprising:

• an electrophotographic photoconductor,
• wherein the electrophotographic photoconductor comprises:
• a photosensitive layer;
• and
• a conductive substrate,
• wherein the photosensitive layer is disposed on the conductive substrate, and the photosensitive layer is a single layer which comprises a charge generating material, an electron transporting material expressed by the Structural Formula 1-9 and a hole transporting material expressed by the General Formula (2):
• wherein R11, R12, R13, R14, R17, R18, R19 and R20 each represents a hydrogen atom, halogen atom, alkoxy group, alkyl group which may be substituted or aryl group which may be substituted, R15 and R16 each is selected from the group consisting of a hydrogen atom, halogen atom, alkyl group, and alkoxy group, and
• wherein the process cartridge for the image forming apparatus is detachably attached to the image forming apparatus.

An image forming apparatus comprising:

• an electrophotographic photoconductor,
• wherein the electrophotographic photoconductor comprises:
• a photosensitive layer;
• and
• a conductive substrate,
• wherein the photosensitive layer is disposed on the conductive substrate, and the photosensitive layer is a single layer which comprises a charge generating material, an electron transporting material expressed by the Structural Formula 1-9 and a hole transporting material expressed by the General Formula (2):
• and
• wherein R11, R12, R13, R14, R17, R18, R19 and R20 each represents a hydrogen atom, halogen atom, alkoxy group, alkyl group which may be substituted or aryl group which may be substituted, R15 and R16 each is selected from the group consisting of a hydrogen atom, halogen atom, alkyl group, and alkoxy group.

An image forming apparatus comprising:

• a process cartridge for an image forming apparatus,
• wherein the process cartridge for the image forming apparatus, comprises:
• an electrophotographic photoconductor,
• wherein the electrophotographic photoconductor comprises:
• a photosensitive layer;
• and
• a conductive substrate,
• wherein the photosensitive layer is disposed on the conductive substrate, and the photosensitive layer is a single layer which comprises a charge generating material, an electron transporting material expressed by the Structural Formula 1-9 and a hole transporting material expressed by the General Formula (2):
• wherein R11, R12, R13, R14, R17, R18, R19 and R20 each represents a hydrogen atom, halogen atom, alkoxy group, alkyl group which may be substituted or aryl group which may be substituted, R15 and R16 each is selected from the group consisting of a hydrogen atom, halogen atom, alkyl group, and alkoxy group, and
• wherein the process cartridge for the image forming apparatus is detachably attached to the image forming apparatus.

An image forming apparatus comprising:

• a plurality of process cartridges for an image forming apparatus,
• wherein the process cartridge for the image forming apparatus, comprises:
• an electrophotographic photoconductor,
• wherein the electrophotographic photoconductor comprises:
• a photosensitive layer;
• and
• a conductive substrate,
• wherein the photosensitive layer is disposed on the conductive substrate, and the photosensitive layer is a single layer which comprises a charge generating material, an electron transporting material expressed by the Structural Formula 1-9 and a hole transporting material expressed by the General Formula (2):
• wherein R11, R12, R13, R14, R17, R18, R19 and R20 each represents a hydrogen atom, halogen atom, alkoxy group, alkyl group which may be substituted or aryl group which may be substituted, R15 and R16 each is selected from the group consisting of a hydrogen atom, halogen atom, alkyl group, and alkoxy group, and
• wherein the process cartridge for the image forming apparatus is detachably attached to the image forming apparatus.

An electrophotographic photoconductor comprising:

• a photosensitive layer;
• and
• a conductive substrate,
• wherein the photosensitive layer is disposed on the conductive substrate and the photosensitive layer is a single layer which comprises a charge generating material, an organic sulfur antioxidant and an electron transporting material expressed by the Structural Formula 1-9, and a hole transporting material selected from the group consisting of compounds of Structural Formulae HTM1, HTM2 and HTM3;
• wherein the organic sulfur antioxidant is selected from the group consisting of compounds of Structural Formulae 3-1 to 3-6;
• S—(CH2CH2COOC8H17)2 3-1
• S—(CH2CH2COOC12H25)2 3-2
• S—(CH2CH2COOC13H27)2 3-3
• S—(CH2CH2COOC14H29)2 3-4
• S—(CH2CH2COOC18H37)2 3-5
• S—(CH2CH2COOC22H45)2 3-6;
• and
• wherein the charge generating material is a titanyl phthalocyanine having a maximum diffraction peak at least at a Bragg angle 2θ(±0.2°) of 27.2°, main diffraction peaks at Bragg angles 2θ(±0.2°) of 9.4°, 9.6° and 24.0°, a diffraction peak at the smallest Bragg angle 2θ(±0.2°) of 7.3°, and no diffraction peaks at Bragg angles 2θ(±0.2°) between 7.3° and 9.4° in its X-ray diffraction spectrum for CuKα X-ray (1.542 Åwavelength).