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公开(公告)号：US11796929B2
公开(公告)日：2023-10-24
申请号：US17338895
申请日：2021-06-04
Applicant: FUJIFILM BUSINESS INNOVATION CORP.
Inventor： Yukimi Kawabata , Natsumi Kaneko , Hideya Katsuhara
CPC classification number: G03G5/0564 , G03G5/047 , G03G5/0609 , G03G5/061443 , G03G15/0275 , G03G15/0867
Abstract: An electrophotographic photoconductor includes: a conductive substrate; and a single-layer-type photoconductive layer that is provided on the conductive substrate and contains a binder resin, a charge generating material, a hole transporting material, and an electron transporting material, in which a volume resistivity of the photoconductive layer after wear is 5.0×1010 Ω·cm or more and 2.0×1011 Ω·cm or less when a ratio of a thickness of the photoconductive layer after wear to a thickness of the photoconductive layer before wear (the thickness of the photoconductive layer after wear/the thickness of the photoconductive layer before wear) is 0.8.
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公开(公告)号：US20190025720A1
公开(公告)日：2019-01-24
申请号：US16035859
申请日：2018-07-16
Applicant: KYOCERA Document Solutions Inc.
Inventor： Jun AZUMA , Kensuke KOJIMA , Tomofumi SHIMIZU
CPC classification number: G03G5/0618 , G03G5/0546 , G03G5/056 , G03G5/0564 , G03G5/0607 , G03G5/0609 , G03G5/0614 , G03G5/0651 , G03G5/0677
Abstract: An electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer. The photosensitive layer includes a charge generating layer and a charge transport layer. The charge generating layer contains a charge generating material. The charge transport layer contains a hole transport material and a binder resin. The charge transport layer further contains an electron acceptor compound. The hole transport material includes a compound represented by general formula (1). In general formula (1), R1, R2, R3, R4, R5, R6, R7, R8, R9, and R10 each represent, independently of one another, a hydrogen atom or a methyl group.
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公开(公告)号：US10078276B2
公开(公告)日：2018-09-18
申请号：US15160601
申请日：2016-05-20
Applicant: KYOCERA Document Solutions Inc.
Inventor： Hiroki Tsurumi , Eiichi Miyamoto
CPC classification number: G03G5/0614 , G03G5/0603 , G03G5/0605 , G03G5/0607 , G03G5/0609 , G03G5/0618 , G03G5/0672 , G03G15/02 , G03G21/18
Abstract: A positively chargeable single-layer electrophotographic photosensitive member is used as an image bearing member in an image forming apparatus including a charging section configured to be in contact with the image bearing member to apply a voltage thereto. The positively chargeable single-layer electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer. The photosensitive layer contains at least a charge generating material, a hole transport material, an electron transport material, and a binder resin. The hole transport material contains a triarylamine derivative represented by the following general formula (I). In general formula (I), R1, R2, m and n have the same meaning as R1, R2, m, and n defined in the description.
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4.发明申请公开(公告)号：US20180215183A1
公开(公告)日：2018-08-02
申请号：US15879853
申请日：2018-01-25
Applicant: KYOCERA Document Solutions Inc.
Inventor： Tomofumi SHIMIZU , Kiichiro OJI
CPC classification number: G03G5/0603 , G03G5/0514 , G03G5/0521 , G03G5/0609 , G03G5/0629 , G03G5/0637 , G03G5/0642 , G03G5/0661 , G03G5/09
Abstract: An electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer. The photosensitive layer is a single-layer photosensitive layer. The photosensitive layer contains a charge generating material, a hole transport material, an electron transport material, a binder resin, and an additive. The additive contains a carboxylic acid anhydride. A reduction potential of the carboxylic acid anhydride is at least −1.40 V versus a reference electrode (Ag/Ag+). The carboxylic acid anhydride is contained in an amount of at least 0.02 parts by mass and no greater than 10.00 parts by mass relative to 100 parts by mass of the binder resin.
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公开(公告)号：US09946175B2
公开(公告)日：2018-04-17
申请号：US15128914
申请日：2015-03-23
Applicant: CANON KABUSHIKI KAISHA
Inventor： Koichi Nakata , Shinji Takagi , Yuzo Tokunaga , Masaki Nonaka , Ryoichi Tokimitsu
CPC classification number: G03G5/07 , G03G5/0564 , G03G5/0603 , G03G5/0605 , G03G5/0609 , G03G5/0614 , G03G5/0618 , G03G5/0696 , G03G5/14743 , G03G21/18
Abstract: To provide an electrophotographic photosensitive member which satisfies abrasion resistance and electrical properties and which is difficult to cause image deletion. A surface layer of the electrophotographic photosensitive member of this invention contains a polymerized product of a hole transporting compound having a polymerizable functional group, in which the hole transporting compound is at least one compound selected from the group consisting of: a compound consisting of one or more carbon atoms, one or more hydrogen atoms, and one or more halogen atoms; and a compound consisting of one or more carbon atoms, one or more hydrogen atoms, one or more oxygen atoms, and one or more halogen atoms.
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Patent Agency Ranking
6.发明申请公开(公告)号：US20180046101A1
公开(公告)日：2018-02-15
申请号：US15667678
申请日：2017-08-03
Applicant: KYOCERA Document Solutions Inc.
Inventor： Tomofumi SHIMIZU , Keiji MARUO , Jun AZUMA
CPC classification number: G03G5/056 , G03G5/0596 , G03G5/0605 , G03G5/0607 , G03G5/0609 , G03G5/0614 , G03G5/0618 , G03G5/0631 , G03G5/0637 , G03G5/0646 , G03G15/75 , G03G21/1814
Abstract: An electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer. The photosensitive layer is a single-layer photosensitive layer. The photosensitive layer contains a charge generating material, a hole transport material, an electron transport material, and a binder resin. The binder resin contains a polyarylate resin (1). The polyarylate resin is represented by general formula (1). The photosensitive layer has a scratch resistance depth of no greater than 0.50 μm. The photosensitive layer has a Vickers hardness of at least 17.0 HV.
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公开(公告)号：US09874824B2
公开(公告)日：2018-01-23
申请号：US14859920
申请日：2015-09-21
Applicant: MITSUBISHI CHEMICAL CORPORATION
Inventor： Akira Ando
CPC classification number: G03G5/047 , G03G5/0564 , G03G5/0609 , G03G5/0614 , G03G5/0616 , G03G5/0696 , G03G5/14708 , G03G5/14756
Abstract: An electrophotographic photoreceptor comprising at least a photosensitive layer on a conductive substrate, wherein the photosensitive layer is a laminate having a charge transport layer and a charge generation layer, the charge transport layer contains four or more types of compounds each having a maximum absorption wavelength falling within a wavelength range of from 300 nm to 600 nm in a tetrahydrofuran solution at 25° C., and maximum absorption wavelengths falling within the wavelength range of at least four types of the compounds of said four or more types of the compounds are separated from each other by 10 nm or more.
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公开(公告)号：US20170363978A1
公开(公告)日：2017-12-21
申请号：US15618243
申请日：2017-06-09
Applicant: KYOCERA Document Solutions Inc.
Inventor： Hideki OKADA
IPC: G03G5/06 , G03G5/05 , C07C49/683 , C07C2602/10 , C07C2603/74
CPC classification number: G03G5/0609 , C07C49/683 , C07C2601/14 , C07C2602/10 , C07C2603/74 , G03G5/0564 , G03G5/0607 , G03G5/0614 , G03G5/0696
Abstract: A quinone derivative is represented by general formula (1). In general formula (1), at least one of R1-R3 and at least one of R4-R6 each represent, independently of one another, an alkyl group having 4 to 10 carbon atoms or an alkyl group having 2 to 5 carbon atoms that has an aryl group having 6 to 14 carbon atoms. All other of R1-R3 and all other of R4-R6 each represent, independently of one another, an alkyl group having 1 to 6 carbon atoms, an aryl group having 6 to 14 carbon atoms, or a cycloalkyl group having 3 to 10 carbon atoms.
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公开(公告)号：US09785062B2
公开(公告)日：2017-10-10
申请号：US15171467
申请日：2016-06-02
Applicant: KYOCERA Document Solutions Inc.
Inventor： Hiroki Tsurumi , Eiichi Miyamoto
CPC classification number: G03G5/0614 , G03G5/0564 , G03G5/0575 , G03G5/0578 , G03G5/0609 , G03G5/0612 , G03G5/0672
Abstract: In a positively chargeable single-layer electrophotographic photosensitive member, a photosensitive layer contains at least a hole transport material, and particles of a first resin. A compound represented by general formula (1) is contained as the hole transport material. In the general formula (1), R1 represents an alkyl group having a carbon number of at least 2 and no greater than 4. R2, R3, R4, R5, and R6 each represent, independently of one another, a hydrogen atom or an alkyl group having a carbon number of at least 1 and no greater than 4. Ar1 and Ar2 each represent, independently of each other, a hydrogen atom or an optionally substituted aryl group having a carbon number of at least 6 and no greater than 20. At least one of Ar1 and Ar2 represents an optionally substituted aryl group having a carbon number of at least 6 and no greater than 20.
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公开(公告)号：US20170261872A1
公开(公告)日：2017-09-14
申请号：US15217203
申请日：2016-07-22
Applicant: FUJI XEROX CO., LTD.
Inventor： Keisuke KUSANO , Masahiro IWASAKI , Jiro KORENAGA , Yukimi KAWABATA
IPC: G03G15/00
CPC classification number: G03G5/0696 , G03G5/04 , G03G5/0528 , G03G5/0609 , G03G5/0612 , G03G5/0614 , G03G5/0618 , G03G5/07 , G03G15/75
Abstract: An electrophotographic photoreceptor includes a conductive substrate and a single-layer-type photosensitive layer on the conductive substrate. The single-layer-type photosensitive layer contains a binder resin, a charge generating material, an electron transporting material, and a hole transporting material. The single-layer-type photosensitive layer has a concentration ratio (A/B) of 0.7 or more and 1.0 or less, where the concentration ratio (A/B) is a ratio of a concentration A of the electron transporting material relative to the binder resin measured from a surface of the photosensitive layer remote from the conductive substrate to a concentration B of the electron transporting material relative to the binder resin measured from a surface of the photosensitive layer close to the conductive substrate.
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