| 摘要 |
The charge transporting layer as the surface layer of an electrophotographic photosensitive member includes a charge transporting substances represented by any one of formulae (1) to (5), a specific compound, and a specific resin (binder resin). The specific compound is hexanol, heptanol, cyclohexanol, benzyl alcohol, ethylene glycol, 1,4-butanediol, 1,5-pentanediol, diethylene glycol, diethylene glycol ethyl methyl ether, ethylene carbonate, propylene carbonate, nitrobenzene, pyrrolidone, N-methylpyrrolidone, methyl benzoate, ethyl benzoate, benzyl acetate, ethyl 3-ethoxypropionate, acetophenone, methyl salicylate, dimethyl phthalate, or sulfolane. |
| 主权项 |
1. An electrophotographic photosensitive member comprising:
a support; a charge generating layer formed on the support; and a charge transporting layer formed on the charge generating layer; wherein the charge transporting layer is a surface layer, and the surface layer comprises: (α) at least one charge transporting substance selected from the group consisting of a compound represented by the following formula (1), a compound represented by the following formula (2), a compound represented by the following formula (3), a compound represented by the following formula (4) and a compound represented by the following formula (5); (β) at least one compound selected from the group consisting of hexanol, heptanol, cyclohexanol, benzyl alcohol, ethylene glycol, 1,4-butanediol, 1,5-pentanediol, diethylene glycol, diethylene glycol ethyl methyl ether, ethylene carbonate, propylene carbonate, nitrobenzene, pyrrolidone, N-methylpyrrolidone, methyl benzoate, ethyl benzoate, benzyl acetate, ethyl 3-ethoxypropionate, acetophenone, methyl salicylate, dimethyl phthalate, and sulfolane; and (γ) at least one resin selected from the group consisting of a polycarbonate resin having a siloxane moiety at the end, and a polyester resin having a siloxane moiety at the end; where, Ar1 and Ar3 each independently represent a phenyl group, or a phenyl group substituted with a methyl group, an ethyl group, or an ethoxy group, Ar2 and Ar4 each independently represent a phenyl group, a phenyl group substituted with a methyl group, a phenyl group substituted with a univalent group represented by the formula “—CH═CH—Ta”, or a biphenylyl group substituted with a univalent group represented by the formula “—CH═CH—Ta” (where, Ta represents an univalent group derived from a benzene ring of a triphenylamine by loss of one hydrogen atom, or derived from a benzene ring of a triphenylamine substituted with a methyl group or an ethyl group by loss of one hydrogen atom), R1 represents a phenyl group, a phenyl group substituted with a methyl group, or a phenyl group substituted with a univalent group represented by the formula “—CH═C(Ar5)Ar6” (where, Ar5 and Ar6 each independently represent a phenyl group or a phenyl group substituted with a methyl group), and R2 and R3 each independently represent a hydrogen atom, a phenyl group, or a phenyl group substituted with a methyl group; where, Ar21 and Ar22 each independently represent a phenyl group, or a phenyl group substituted with a methyl group, Ar23 to Ar28 each independently represent a phenyl group, or a phenyl group substituted with a methyl group, Ar31 represents a phenyl group substituted with a univalent group derived from a benzene ring of a triphenylamine by loss of one hydrogen atom, a phenyl group substituted with a univalent group derived from a benzene ring of a triphenylamine substituted with a methyl group or an ethyl group by loss of one hydrogen atom, or a methylcarbazolyl group. |
