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    ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER
    33.
    发明申请
    ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER 审中-公开

    公开(公告)号：US20200233321A1

    公开(公告)日：2020-07-23

    申请号：US16746274

    申请日：2020-01-17

    Applicant: KYOCERA Document Solutions Inc.

    Inventor： Kazutaka SUGIMOTO ,  Kensuke OKAWA ,  Jun AZUMA

    IPC: G03G5/047 ,  G03G5/05

    Abstract: An electrophotographic photosensitive member includes a conductive substrate, a charge generating layer, and a charge transport layer. The charge generating layer has a thickness of at least 0.07 μm. The charge transport layer contains a binder resin, a hole transport material, and meta-terphenyl. The binder resin includes a polyarylate resin including repeating units and a group represented by respective general formulas (1) to (3). The electrophotographic photosensitive member satisfies at least two conditions of: (A) the charge generating layer has a thickness of at least 0.12 μm; (B) the charge transport layer contains a specific amount of fluororesin particles; and (C) the charge transport layer contains meta-terphenyl in an amount of at least 5.0 parts by mass and no greater than 15.0 parts by mass relative to 100 parts by mass of the binder resin.

    ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER AND IMAGE FORMING APPARATUS
    34.
    发明申请
    ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER AND IMAGE FORMING APPARATUS 审中-公开

    公开(公告)号：US20200026207A1

    公开(公告)日：2020-01-23

    申请号：US16496487

    申请日：2017-12-28

    Applicant: KYOCERA Document Solutions Inc.

    Inventor： Kensuke OKAWA ,  Seiki HASUNUMA ,  Jun AZUMA

    IPC: G03G5/06 ,  G03G5/07 ,  G03G15/00

    Abstract: An electrophotographic photosensitive member (1) includes a conductive substrate (2) and a photosensitive layer (3) disposed directly or indirectly on the conductive substrate (2). The photosensitive layer (3) has a charge generating layer (3a) and a charge transport layer (3b) disposed in order from the conductive substrate (2). The charge generating layer (3a) contains a charge generating material. The charge transport layer (3b) contains a charge transport material, a binder resin, and a pigment that absorbs light having an irradiation wavelength. The binder resin includes a polyarylate resin including a repeating unit represented by general formula (1): In general formula (1), X and Y each represent, independently of one another, a divalent group represented by chemical formula (1-1). (1-2), (1-3), or (1-4): The pigment is a naphthalocyanine compound represented by general formula (2) or (3):

    PRODUCTION METHOD FOR ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER
    35.
    发明申请
    PRODUCTION METHOD FOR ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER 审中-公开

    公开(公告)号：US20190354029A1

    公开(公告)日：2019-11-21

    申请号：US16411173

    申请日：2019-05-14

    Applicant: KYOCERA Document Solutions Inc.

    Inventor： Jun AZUMA ,  Tomofumi SHIMIZU ,  Kenji KITAGUCHI ,  Kiichiro OJI

    IPC: G03G5/05 ,  G03G5/06

    Abstract: 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),

    POLYARYLATE RESIN AND ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER
    36.
    发明申请
    POLYARYLATE RESIN AND ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER 审中-公开

    公开(公告)号：US20190270846A1

    公开(公告)日：2019-09-05

    申请号：US16461221

    申请日：2017-09-25

    Applicant: KYOCERA Document Solutions Inc.

    Inventor： Jun AZUMA ,  Kenji KITAGUCHI

    IPC: C08G63/181 ,  C08G63/193 ,  G03G5/06 ,  G03G5/05

    Abstract: 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.

    POLYARYLATE RESIN AND ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER
    39.
    发明申请
    POLYARYLATE RESIN AND ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER 审中-公开

    公开(公告)号：US20180046099A1

    公开(公告)日：2018-02-15

    申请号：US15668759

    申请日：2017-08-04

    Applicant: KYOCERA Document Solutions Inc.

    Inventor： Jun AZUMA ,  Kensuke OKAWA ,  Seiki HASUNUMA ,  Tomofumi SHIMIZU

    IPC: G03G5/05 ,  G03G5/06 ,  G03G5/047 ,  C08G63/00

    Abstract: An electrophotographic photosensitive member includes a photosensitive layer. The photosensitive layer contains a charge generating material, a hole transport material, and a binder resin. The binder resin contains a polyarylate resin represented by general formula (1). In general formula (1), r and s each represent an integer of at least 0 and no greater than 49 and t and u represents an integer of at least 1 and no greater than 50. Furthermore, r+s+t+u=100 and r+t=s+u. X and Y each represent, independently of one another, a divalent group represented by chemical formula (1-1), (1-2), (1-3), or (1-4).

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