Electrophotographic photoconductor and electrophotographic apparatus

An electrophotographic apparatus comprising:

• a charging unit,
• an exposing unit,
• a developing unit,
• a transfer unit, and
• an electrophotographic photoconductor,
• wherein the electrophotographic photoconductor comprises
• a conductive support, and
• a photosensitive layer formed over the conductive support,
• wherein the photosensitive layer comprises a charge generation agent, a charge transport agent and a binder resin, and
• wherein the charge generation agent comprises an asymmetric disazo pigment represented by the following General Formula (I), the charge transport agent comprises a triphenylamine compound represented by the following General Formula (IX), and the ratio by mass of the charge transport agent to the binder resin is 0.3 to 2.0,
• where R1 and R2 each represent a substituted or unsubstituted alkyl group, alkoxy group, aryl group or heterocyclic group, provided that R1 and R2 are different,
• where R3 to R5 each represent hydrogen, a halogen atom, an alkyl group having 1 to 6 carbon atoms, which may have a substituent, an alkoxy group having 1 to 6 carbon atoms, which may have a substituent, or a substituted or unsubstituted aryl group having 6 to 12 carbon atoms.

An electrophotographic process cartridge comprising:

• at least one of a charging unit, an exposing unit, a developing unit, a cleaning unit and a transfer unit, and
• an electrophotographic photoconductor,
• wherein the electrophotographic photoconductor comprises
• a conductive support, and
• a photosensitive layer formed over the conductive support,
• wherein the photosensitive layer contains a charge generation agent, a charge transport agent and a binder resin, and
• wherein the charge generation agent comprises an asymmetric disazo pigment represented by the following General Formula (I), the charge transport agent comprises a triphenylamine compound represented by the following General Formula (IX), and the ratio by mass of the charge transport agent to the binder resin is 0.3 to 2.0,
• where R1 and R2 each represent a substituted or unsubstituted alkyl group, alkoxy group, aryl group or heterocyclic group, provided that R1 and R2 are different,
• where R3 to R5 each represent hydrogen, a halogen atom, an alkyl group having 1 to 6 carbon atoms, which may have a substituent, an alkoxy group having 1 to 6 carbon atoms, which may have a substituent, or a substituted or unsubstituted aryl group having 6 to 12 carbon atoms.