Patent ID: 7919219
Filing Date: 2011-04-05
Classification: G03G

Abstract:
1. An electrophotographic photosensitive body comprising a conductive support having thereon a layer comprising at least one p-terphenyl compound selected from the following compounds (1) to (5) and an additive, wherein the additive comprises at least one selected from the group consisting of: an organic phosphite compound represented by general formula (A1) wherein R 1 , R 2 and R 3 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 R 1 , R 2 and R 3 are all hydrogen atoms simultaneously is excluded; a triphenylated phosphorus compound represented by general formula (A2) wherein R 4 , R 5 , R 6 , R 7 , R 8 and R 9 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) wherein R 10 and R 11 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 R 12 , R 13 , R 14 and R 15 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 R 16 , R 17 and R 18 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 R 19 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, R 20 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, R 21 represents a hydrogen atom, a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group, and R 22 and R 23 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 R 24 represents a hydrogen atom or a hydroxyl group, R 25 and R 26 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 R 27 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 R 27 represents a substituted or unsubstituted alkyl group, and R 28 , R 29 , R 30 and R 31 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 R 32 represents a substituted or unsubstituted alkyl group, R 33 , R 34 and R 35 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 R 36 , R 37 , R 38 and R 39 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 R 36 and R 37 and the pair of R 38 and R 39 , 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 R 40 and R 41 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.