Electrophotographic photosensitive body

An electrophotographic photosensitive body, comprising:

• a conductive support and a layer comprising at least one p-terphenyl compound selected from the group consisting of:
• wherein the layer is present on the conductive support;
• and at least one additive selected from the group consisting of:
• an organic phosphite compound represented by general formula (A1)
• wherein R1, R2 and R3 which may be the same or different represent a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group or a substituted or unsubstituted aryl group, with the proviso that the case where R1, R2 and R3 are all hydrogen atoms simultaneously is excluded;
• a triphenylated phosphorus compound represented by general formula (A2)
• wherein R4, R5, R6, R7, R8 and R9 which may be the same or different represent a hydrogen atom, a halogen atom, a hydroxyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted amino group or a substituted or unsubstituted alkyl group;
• a thioether compound represented by general formula (A3)
• R10—S—R11 (A3)
• wherein R10 and R11 which may be the same or different represent a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group or a substituted or unsubstituted aryl group;
• a hydroquinone compound represented by general formula (A4)
• wherein R12, R13, R14 and R15 which may be the same or different represent a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted amino group, a substituted or unsubstituted arylthio group, a substituted or unsubstituted acyl group, a substituted or unsubstituted silyl group, a substituted or unsubstituted aryloxy group or a substituted or unsubstituted phosphino group;
• a benzotriazole compound represented by general formula (A5)
• wherein R16, R17 and R18 which may be the same or different represent a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group or a substituted or unsubstituted aryl group;
• a benzotriazole-alkylene bisphenol compound represented by general formula (A6)
• wherein R19 represents a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted alkoxy group or a substituted or unsubstituted aryl group, R20 represents a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkoxy group or a substituted or unsubstituted aralkyl group, R21 represents a hydrogen atom, a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group, and R22 and R23 which may be the same or different represent a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted aryl group or a substituted or unsubstituted alkyl aryl group;
• a hydroxybenzophenone compound represented by general formula (A7)
• wherein R24 represents a hydrogen atom or a hydroxyl group, R25 and R26 which may be the same or different represent a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group or a substituted or unsubstituted aryl group, and R27 represents a hydrogen atom, a substituted or unsubstituted alkyl group or a substituted or unsubstituted aralkyl group;
• a hindered phenol compound represented by general formula (A8)
• wherein R27 represents a substituted or unsubstituted alkyl group, and R28, R29, R30 and R31 which may be the same or different represent a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group or a substituted or unsubstituted alkoxy group,
• or general formula (A9)
• wherein R32 represents a substituted or unsubstituted alkyl group, R33, R34 and R35 which may be the same or different represent a hydrogen atom, a substituted or unsubstituted alkyl group or a substituted or unsubstituted alkoxy group, q is an integer of 2, 3 or 4, and E represents an oxygen atom, a sulfur atom or an aliphatic divalent group when q is 2, represents an aliphatic trivalent group or an aromatic trivalent group when q is 3, and represents an aliphatic tetravalent group when q is 4;
• a hindered amine compound represented by general formula (A10)
• wherein R36, R37, R38 and R39 which may be the same or different represent a hydrogen atom, a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group, Z represents an atomic group necessary to form a nitrogen-containing heterocycle, wherein in the pair of R36 and R37 and the pair of R38 and R39, one of them may be incorporated into Z to form a double bond, u represents a hydrogen atom, an oxygen atom, a substituted or unsubstituted alkyl group or a substituted or unsubstituted acyl group, and j represents a hydroxyl group, a substituted or unsubstituted acyloxy group, a substituted or unsubstituted benzoyl group or other organic residues;
• and
• a salicylate compound represented by general formula (A11)
• wherein R40 and R41 which may be the same or different represent a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group or a substituted or unsubstituted aryl group;
• and
• wherein the layer contains the additive in an amount of from 0.05 to 30 mass % based on the p-terphenyl compound.