Patent TW-382666-B (TW)
Title: Electrophotosensitive material
Inventor: KATSUKAWA MASAHITO
IPC: G03G5/05
Filed: 1995-10-19
Granted: 2000-02-21
Abstract: There is disclosed an electrophotosensitive material comprising a conductive substrate and an organic photosensitive layer provided on the conductive substrate, the organic photosensitive layer contaning a binding resin, an electric charge generating material and a hole transferring material, wherein the binding resin comprises at least one selected from the group consisting of a polycarbonate of a repeating unit represented by the formula (1): [Figure] wherein RA and RB are the same or different and indicate a hydrogen atom or an alkyl group having 1 to 3 carbon atoms; RC and RD are the same or different and indicate an alkyl group having 1 to 3 carbon atoms; and RE and RF are the same or different and indicate a hydrogen atom, an alkyl group having 1 to 3 carbon atoms, or a halogen atom, a polycarbonate of a repeating unit represented by the formula (2): [Figure] wherein RG and RH are the same or different and indicate an alkyl group having 1 to 3 carbon atoms; and RI and RJ are the same or different and indicate a hydrogen atom, an alkyl group having 1 to 3 carbon atoms, or a halogen atom, a polycarbonate of a repeating unit represented by the formula (3): [Figure] and a polycarbonate as a random copolymer or a block copolymer of a repeating unit represented by the formula (4): [Figure] wherein RK and RL are the same or different and indicate a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, and RK and RL may bond each other to form a ring having 3 to 7 carbon atoms; RM and RN are the same or different and indicate an alkyl group having 1 to 3 carbon atoms; and RO and RP are the same or different and indicate a hydrogen atom, an alkyl group having 1 to 3 carbon atoms, or a halogen atom and formula (5): [Figure] wherein RQ and RR are the same or different and indicate a hydrogen atom, an alkyl group having 1 to 3 carbon atoms or a phenyl group, and RQ and RR may bond each other to form a ring having 3 to 7 carbon atoms; and RS, RT, RU, RV, RW, RX, RY and RZ are the same or different and indicate a hydrogen atom, an alkyl group having 1 to 3 carbon atoms, or a halogen atom, the hole transferring material is at least one sort selected from the group consisting of a benzidine derivative represented by the formula (6): [Figure] wherein R1 and R2 are the same or different and indicate a hydrogen atom, or C1-4 alkyl group; R3, R4, R5 and R6 are the same or different and indicate C1-4 alkyl group; and a, b, c and d are the same or different and indicate an integer of 0 to 2; provided that at least one of a, b, c and d indicates an integer of 2 or more, and c and d indicate an integer other than 0 when a and b indicate 0, simultaneously, a benzidine derivative represented by the formula (7): [Figure] wherein R7 and R8 are the same or different and indicate a hydrogen atom or C1-4 alkyl group; R9 and R10 are the same or different and indicate a C1-4 alkyl group, or a phenyl group which substituted by C1-4 alkyl group; R11 and R12 are the same or different and indicate a C1-4 alkyl group; and e, f, g and h are the same or different and indicate an integer of 0 to 2, a benzidine derivative represented by the formula (8): [Figure] wherein R13, R14, R15 and R16 are the same or different and indicate a C1-4 alkyl group; and R17, R18, R19 and R20 are the same or different and indicate a hydrogen atom, C1-4 alkyl group, or a phenyl group which may substituted by C1-4 alkyl group, a benzidine derivative represented by the formula (9): [Figure] wherein R21, R22, R23 and R24 are the same or different and indicate a C1-4 alkyl group; and R25, R26, R27 and R28 are the same or different and indicate a hydrogen atom, a C1-4 alkyl group, and o-phenylenediamine derivative represented by the formula (10): [Figure] wherein R29, R30, R31 and R32 are the same or different and indicate a C1-4 alkyl group, or a phenyl group; and q, r, s and t are the same or different and indicate an integer of 1 to 2, and a m-phenylenediamine derivative represented by the formula (11): [Figure] wherein R33, R34, R35 and R36 are the same or different and indicate a C1-4 alkyl group, or a phenyl group; and u, v, w and x are the same or different and indicate an integer of 1 to 2.