发明名称 Multilayer type electrophotographic photoconductor and image forming apparatus
摘要 The present invention is to provide a multilayer type electrophotographic photoconductor capable of stably obtaining a high image quality image over a long term by restraining the exposure memory and the photo memory, and an image forming apparatus comprising such a multilayer type electrophotographic photoconductor. A multilayer type electrophotographic photoconductor comprising a charge generating layer containing at least a charge generating agent on a base member directly or via an intermediate layer, and a charge transporting layer containing at least a charge transporting agent and a binder resin formed successively, wherein the light absorption degree at a 680 nm wavelength light beam in the photoconductive layer of the multilayer type electrophotographic photoconductor is of a value of 0.8 or less, and the light absorption degree at a 450 nm wavelength light beam is of a value of 1.0 or more, and an image forming apparatus comprising such a multilayer type electrophotographic photoconductor are provided.
申请公布号 US8765337(B2) 申请公布日期 2014.07.01
申请号 US200711805588 申请日期 2007.05.24
申请人 Kyocera Mita Corporation 发明人 Maruo Keiji;Otsubo Junichiro;Azuma Jun
分类号 G03G5/047 主分类号 G03G5/047
代理机构 Carmody Torrance Sandak & Hennessey LLP 代理人 Carmody Torrance Sandak & Hennessey LLP
主权项 1. A multilayer type electrophotographic photoconductor comprising a charge generating layer containing at least a charge generating agent on a base member directly or via an intermediate layer, and a charge transporting layer containing at least a charge transporting agent and a binder resin formed successively, wherein the base member is aluminum; the film thickness of the charge generating layer is a value within a range from 0.2 or more to below 0.38 μm, the charge generating agent comprises a titanyl phthalocyanine crystal having a peak in a Bragg angle of 2θ±0.2°=27.2° in a CuKα characteristic X-ray diffraction spectrum and having one peak within a range of 270 to 400° C. other than a peak accompanied by the vaporization of adsorbed water in a differential scanning calorie analysis; the charge transporting agent comprises a hole transporting agent represented by one of the following general formulae (3), and (5) to (6); and wherein the light absorption degree at a 680 nm wavelength light beam in a photoconductive layer of the multilayer type electrophotographic photoconductor is of a value of 0.8 or less, and the light absorption degree at a 450 nm wavelength light beam is of a value of 1.0 or more; wherein in the general formula (3), R1 to R12 are each independently a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group having 1 to 12 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 12 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 6 to 30 carbon atoms, or —OR13, wherein R13 is an alkyl group having 1 to 10carbon atoms, a perfluoroalkyl group, or an aryl group having 6 to 30 carbon atoms, Ar1 is a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 12 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, and n is an integer of 0 to 2; wherein in the general formula (5), X2 is a substituted or unsubstituted arylene group having 6 to 30 carbon atoms, an unsubstituted hydrocarbon group having an aryl group having 6 to 30 carbon atoms, or a condensed polycyclic hydrogen group having 10 to 30 carbon atoms, R24 to R34 are each independently a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group having 1 to 12 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 12 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 6 to 30 carbon atoms, or —OR35, wherein R35 is an alkyl group having 1 to 10 carbon atoms, a perfluoroalkyl group, or an aryl group having 6 to 30 carbon atoms, R24 to R28, R29 and R30, R31 and R34, and R32 and R33 may form a saturated or unsaturated ring by linking two substituents with each other, or R26 may be a substituent of the following formula (5′) in addition to the above mentioned substituents; in the general formula (5′), Ar4 and Ar5 are a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 12 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, and d is an integer of 0 to 2; in the general formula (6), R37 to R46 are each independently a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group having 1 to 12 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 12 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 6 to 30 carbon atoms, or —OR47, wherein R47 is an alkyl group having 1 to 10 carbon atoms, a perfluoroalkyl group, or an aryl group having 6 to 30 carbon atoms, R37 to R41, R42 and R43 and R45 and R46 may form a saturated or unsaturated ring by linking two substituents with each other, Ar6 and Ar7 are a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 12 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 30 carbon atoms and e is an integer of 0 to 2.
地址 Osaka JP