Electrophotographic photosensitive member, process cartridge, and image forming apparatus

An electrophotographic photosensitive member, comprising:

• a conductive base;
• and
• a photosensitive layer provided on the conductive base, wherein the photosensitive layer contains a base material, a charge generation material, a dispersing aid, a hole transport agent, and an electron transport agent,
• wherein the base material is a polyarylate resin having repeating units represented by the following formula (1), formula (2), formula (3), and formula (4), in which a content ratio of the repeating units represented by the formula (3) with respect to a total number of the repeating units represented by the formula (1) and formula (3) is greater than 0% and less than 20%,
• wherein the charge generation material is titanyl phthalocyanine,
• wherein the dispersion aid includes a compound represented by the following formula (5) or formula (6),
• wherein the hole transport agent includes a compound represented by the following formula (7) or formula (8)
• in the formula (1), R1 and R2 each independently represents a hydrogen atom or a methyl group, and X represents a divalent group represented by the following formula (X1) or formula (X2), in the formula (2), W represents a divalent group represented by the following formula (W1) or formula (W2),
• in the formula (X1), t represents an integer of 1 or more and 3 or less, * represents a bond, in the formula (X2), R3 and R4 each represents a hydrogen atom or an alkyl group having 1 or more and 4 or less carbon atoms, which are mutually different groups, * represents a bond,
• in the formula (W1) and the formula (W2), * represents a bond,
• in the formula (5), R11 represents a phenylene group which may be substituted by an alkyl group, or a biphenyldiyl group which may be substituted by an alkyl group, R12, R13, R14, R15, R16, R17, R18, and R19 each independently represents a hydrogen atom or a halogen atom, and in the formula (6), R20 and R21 each independently represents a hydrogen atom or a halogen atom, and R22, R23, R24, R25, R26, R27, R28, R29, R30, and R31 each independently represents a hydrogen atom, a halogen atom, a trifluoromethyl group, or a phenoxy group,
• in the formula (7) and the formula (8), R41 represents an alkyl group having 1 to 8 carbon atoms or an alkoxy group having 1 to 8 carbon atoms, R42, R43, R46, R47, R48, R50, and R51 each independently represents an alkyl group having 1 to 8 carbon atoms, R44 represents an aryl group or a hydrogen atom, R45 and R49 each represents an alkyl group having 1 to 8 carbon atoms or a hydrogen atom, and v1, v2, v3, v4, v5, v6, v7, and v8 each independently represents an integer of 0 to 5.