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公开(公告)号：US20200012205A1
公开(公告)日：2020-01-09
申请号：US16260141
申请日：2019-01-29
申请人： FUJI XEROX CO.,LTD.
发明人： Yoichi KIGOSHI , Takeshi IWANAGA , Nobuyuki TORIGOE , Masaki HIRAKATA , Hideya KATSUHARA , Keisuke KUSANO
摘要： An electrophotographic photoreceptor includes a conductive substrate; an undercoat layer on the conductive substrate; a charge generating layer on the undercoat layer; a charge transporting layer on the charge generating layer; and an inorganic protective layer on the charge transporting layer. The undercoat layer, the charge transporting layer, and the inorganic protective layer each have a film elastic modulus of 5 GPa or more.
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52.发明申请公开(公告)号：US20190369511A1
公开(公告)日：2019-12-05
申请号：US16423337
申请日：2019-05-28
发明人： Yuka Ishiduka , Tsutomu Nishida , Atsushi Okuda , Hiroyuki Watanabe , Hideharu Shimozawa , Nobuhiro Nakamura , Kenichi Kaku , Daisuke Miura , Koichi Nakata , Masaki Nonaka , Koji Takahashi , Haruki Mori
摘要： An electrophotographic photosensitive member includes a support and a surface layer, in which the surface layer contains a copolymer of a composition which contains at least a compound represented by the following general formula (1) and a compound represented by the following general formula (2), a content of the compound represented by the general formula (1) in the composition is 25 mass % or more and 70 mass % or less with respect to a total content of the compound represented by the general formula (1) and the compound represented by the general formula (2), and the total content of the compound represented by the general formula (1) and the compound represented by the general formula (2) is 55 mass % or more with respect to a total mass of the composition.
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公开(公告)号：US20190354029A1
公开(公告)日：2019-11-21
申请号：US16411173
申请日：2019-05-14
发明人： Jun AZUMA , Tomofumi SHIMIZU , Kenji KITAGUCHI , Kiichiro OJI
摘要： A method for producing an electrophotographic photosensitive member includes an electrically conductive substrate and a photosensitive layer. The method includes applying an application liquid for photosensitive layer formation containing a solvent, a binder resin, and a hole transport material directly or indirectly onto the electrically conductive substrate, and removing a portion of the solvent, to form the photosensitive layer. The solvent contains a first solvent that is an alcohol having a carbon number of at least 1 and no greater than 3, and a second solvent other than the first solvent. The binder resin includes a polyarylate resin that is a polymerization product of monomers including a first monomer represented by general formula (1) and a second monomer represented by general formula (2),
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公开(公告)号：US10459357B2
公开(公告)日：2019-10-29
申请号：US16008354
申请日：2018-06-14
申请人： FUJI XEROX CO., LTD.
摘要： An electrophotographic photoreceptor includes a conductive substrate; an undercoat layer formed on the conductive substrate and containing a polyurethane resin, metal oxide particles, a silane coupling agent, and a compound represented by General Formula (ID); and a photosensitive layer formed on the undercoat layer (where R1 to R8 each independently represent a hydrogen atom, a nitro group, a cyano group, a halogen atom, a hydroxyl group, a saturated or unsaturated aliphatic hydrocarbon group optionally having a substituent, an aromatic hydrocarbon group optionally having a substituent, an alkoxy group optionally having a substituent, an aryloxy group optionally having a substituent, a sulfo group optionally having a substituent, an amino group, an alkylamino group optionally having a substituent, or an arylamino group optionally having a substituent).
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公开(公告)号：US10416579B2
公开(公告)日：2019-09-17
申请号：US16045144
申请日：2018-07-25
发明人： Toshiki Takeuchi , Seizo Kitagawa , Kazuya Saito
摘要： An electrophotographic photoreceptor which, even when mounted on a high-image-quality monochrome high-speed printer or tandem color printer including a cleaner-less process of a non-magnetic single-component contact development system using a polymerized toner, inhibits the generation of fine black spots or color spots and suppresses the occurrence of toner filming during the initial printing under a high-temperature and high-humidity environment and thereby stably attains a high image quality in a variety of environments. The electrophotographic photoreceptor is a positively-chargeable electrophotographic having a contact angle between the surface of an outermost layer and water that is in a range of 81° to 87° and having a binder resin of an outermost layer containing resins having repeating units represented by Formula (1) and Formula (2) below:
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公开(公告)号：US20190271924A1
公开(公告)日：2019-09-05
申请号：US16414126
申请日：2019-05-16
摘要： An organic photoconductor drum includes a support element, a charge generation layer over the support element, a charge transport layer over the charge generation layer, and an overcoat layer. The overcoat layer includes a curable composition having both a non-radical polymerizable additive and a charge transport molecule containing four radical polymerizable functional groups exemplified as: where R1 and R2 contain a spacer group and a radical polymerizable functional group, R3 and R4 are hydrogen atoms, and R5 and R6 contain a spacer group and a radical polymerizable functional group wherein the spacer group of R1, R2, R5, and R6, is an ethyl group and the radical polymerizable functional group of R1, R2, R5 and R6 is an acrylate group. The non-radical polymerizable additive may be a surfactant. The curable composition may also include a curing agent.
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57.发明申请公开(公告)号：US20190271923A1
公开(公告)日：2019-09-05
申请号：US16414104
申请日：2019-05-16
摘要： An overcoat layer for an organic photoconductor drum includes a curable composition having about 20 to about 80 percent by weight of a charge transport molecule containing four radical polymerizable functional groups as exemplified below: where R1 and R2 contain a spacer group and a radical polymerizable functional group, R3 and R4 are hydrogen atoms, and R5 and R6 contain a spacer group and a radical polymerizable functional group. The curable composition may also include a non-radical polymerizable additive, such as a surfactant, and/or a curing agent.
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公开(公告)号：US20190270846A1
公开(公告)日：2019-09-05
申请号：US16461221
申请日：2017-09-25
发明人： Jun AZUMA , Kenji KITAGUCHI
IPC分类号： C08G63/181 , C08G63/193 , G03G5/06 , G03G5/05
摘要： A polyarylate resin is represented by general formula (1) shown below. In general formula (1), R1, R2, R3, and R4 each represent, independently of one another, a hydrogen atom or a methyl group. r and s each represent an integer of at least 0 and no greater than 49. t and u each represent an integer of at least 1 and no greater than 50. r+s+t+u=100. r+t=s+u. r and t may be the same as or different from each other. s and u may be the same as or different from each other. X represents a divalent group represented by chemical formula (2A), (2B), (2C), or (2D). Y represents a divalent group represented by chemical formula (4A), c (4B), or (4C). X and Y are different from each other.
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59.发明授权公开(公告)号：US10401746B2
公开(公告)日：2019-09-03
申请号：US15961756
申请日：2018-04-24
发明人： Kaname Watariguchi , Shoma Hinata , Kazuko Araki , Tsutomu Nishida , Jumpei Kuno , Masataka Kawahara , Yuto Ito , Isao Kawata
摘要： An electrophotographic photosensitive member includes a support member, a charge generating layer containing a phthalocyanine pigment as a charge generating material, a charge transport layer containing a charge transporting material in this order. The charge generating layer has a thickness of less than 200 nm, and the phthalocyanine pigment includes phthalocyanine crystalline particles having a particle size distribution and satisfies a requirement that the volume average of the products of Φi and Ψi is 0.31 or more.
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60.发明申请公开(公告)号：US20190265603A1
公开(公告)日：2019-08-29
申请号：US16272268
申请日：2019-02-11
发明人： Hideharu Shimozawa , Tsutomu Nishida , Atsushi Okuda , Yuka Ishiduka , Nobuhiro Nakamura , Hiroyuki Watanabe
摘要： An electrophotographic photosensitive member having a protective layer wherein the density unevenness among output images is reduced with abrasion resistance maintained is provided. The present invention is an electrophotographic photosensitive member having a support, a photosensitive layer and a protective layer in this order, wherein the protective layer has a triarylamine structure and a cyclic structure represented by the formula (1) or (2): and an A value expressed by expression (4), A=S1/S2, wherein, in expression (4), S1 is a peak area based on in-plane deformation vibration of terminal olefin (CH2═), and S2 is a peak area based on stretching vibration of C═O among peak areas of a spectrum obtained by measuring a surface of the protective layer by total reflection Fourier transform infrared spectroscopy using Ge as an internal reflection element and using a measurement condition of 45° as an incidence angle is from 0.065 to 0.100.
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