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    Electrophotographic photosensitive member
    1.
    发明授权
    Electrophotographic photosensitive member 有权

    公开(公告)号：US09448496B2

    公开(公告)日：2016-09-20

    申请号：US14719911

    申请日：2015-05-22

    Applicant: KYOCERA Document Solutions Inc.

    Inventor： Jun Azuma ,  Keiji Maruo ,  Kensuke Okawa ,  Akihiko Ogata

    IPC: G03G5/047 ,  G03G5/06

    CPC classification number: G03G5/047 ,  G03G5/0614 ,  G03G5/0672 ,  G03G5/0696

    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 located on the charge generating layer. The charge transport layer contains a pigment that is absorptive with respect to a wavelength of exposed light. The pigment is a metal phthalocyanine pigment represented by General Formula (I) or a metal-free phthalocyanine pigment represented by General Formula (II), where X represents a sulfur atom or an oxygen atom. R1 represents an aryl group or an alkyl group. R2-R4 each represent a hydrogen atom, an alkyl group, an aryl group, an alkoxy group, a phenoxy group, an alkylthio group, a phenylthio group, or a dialkylamino group. M represents a metal atom. Y represents non-substitution or an alkyl group, an alkoxy group, an aryloxy group, a halogen atom, an oxygen atom, or a hydroxyl group.

    Polyarylate resin and electrophotographic photosensitive member
    3.
    发明授权
    Polyarylate resin and electrophotographic photosensitive member 有权

    公开(公告)号：US10379451B2

    公开(公告)日：2019-08-13

    申请号：US15904527

    申请日：2018-02-26

    Applicant: KYOCERA Document Solutions Inc.

    Inventor： Jun Azuma ,  Kensuke Okawa ,  Akihiko Ogata ,  Kenji Kitaguchi ,  Tomofumi Shimizu

    IPC: G03G5/05 ,  G03G5/047 ,  G03G5/06 ,  C08G63/672 ,  C08G63/91 ,  C08G63/682

    Abstract: A polyarylate resin includes at least one type of repeating unit represented by a general formula (1), at least one type of repeating unit represented by a general formula (2), and a terminal group represented by a general formula (3). R1, R2, R3, and R4 each represent, independently of one another, a hydrogen atom or a methyl group. R5 and R6 each represent, independently of each other, a hydrogen atom or a C1-4 alkyl group. R5 and R6 may bond together to represent a C5-7 cycloalkylidene group. X1 represents a divalent group represented by a chemical formula (2A), (2B), (2C), or (2D) with the proviso that when only one type of repeating unit represented by the general formula (2) is included, X1 does not represent a divalent group represented by the chemical formula (2D). Rf represents a chain aliphatic group having at least one fluoro group.

    Multi-layer electrophotographic photosensitive member
    5.
    发明授权
    Multi-layer electrophotographic photosensitive member 有权

    公开(公告)号：US09939744B2

    公开(公告)日：2018-04-10

    申请号：US15254012

    申请日：2016-09-01

    Applicant: KYOCERA Document Solutions Inc.

    Inventor： Jun Azuma ,  Kensuke Okawa ,  Junichiro Otsubo ,  Akihiko Ogata

    IPC: G03G5/06 ,  G03G5/05 ,  G03G5/047

    CPC classification number: G03G5/0546 ,  G03G5/047 ,  G03G5/0507 ,  G03G5/0614 ,  G03G5/0672

    Abstract: A multi-layer 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 charge transport material, a binder resin, and silica particles. The charge transport layer is a monolayer. The charge transport layer is disposed as an outermost surface layer of the multi-layer electrophotographic photosensitive member. The silica particles have a content of at least 0.5 parts by mass and no greater than 15 parts by mass relative to 100 parts by mass of the binder resin. The binder resin includes a polyarylate resin. The polyarylate resin has a repeating unit represented by general formula (I) shown below. In general formula (I), R1-R3 and Y are defined as those described in the specification.

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