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    POLYARYLATE RESIN AND ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER
    1.
    发明公开
    POLYARYLATE RESIN AND ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER 审中-公开

    公开(公告)号：US20240103389A1

    公开(公告)日：2024-03-28

    申请号：US18262164

    申请日：2022-01-19

    Applicant: KYOCERA Document Solutions Inc.

    Inventor： Jun AZUMA ,  Keiji MARUO ,  Kenji KITAGUCHI

    IPC: G03G5/05 ,  C08G63/197 ,  C08G63/199

    CPC classification number: G03G5/056 ,  C08G63/197 ,  C08G63/199

    Abstract: A polyarylate resin includes repeating units represented by formulas (1), (2), and (4). The polyarylate resin further includes a repeating unit represented by formula (3) and a percentage of the number of repeats of the repeating unit represented by formula (3) relative to the total number of repeats of the respective repeating units represented by formulas (1) and (3) is greater than 0% and less than 50%. Or, the polyarylate resin does not include the repeating unit represented by formula (3).
    In formula (1), R1 and R2 each represent, independently of one another, a hydrogen atom or a methyl group and X represents a divalent group represented by formula (X1) or (X2). In formula (3), R5 and R6 each represent, independently of one another, a hydrogen atom or a methyl group.

    POLYARYLATE RESIN AND ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER
    2.
    发明申请
    POLYARYLATE RESIN AND ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER 有权

    公开(公告)号：US20220342326A1

    公开(公告)日：2022-10-27

    申请号：US17705063

    申请日：2022-03-25

    Applicant: KYOCERA Document Solutions Inc.

    Inventor： Jun AZUMA ,  Keiji MARUO ,  Kenji KITAGUCHI

    IPC: G03G5/05 ,  C08G63/672

    Abstract: A polyarylate resin includes repeating units represented by formulas (1), (2), (3), and (4). A third percentage is greater than 0% and less than 50%. The third percentage is a percentage of the number of repeats of the repeating unit represented by formula (3) relative to the total of the number of repeats of the repeating unit represented by formula (1) and the number of repeats of the repeating unit represented by formula (3). A fourth percentage is at least 35% and less than 70%. The fourth percentage is a percentage of the number of repeats of the repeating unit represented by formula (4) relative to the total of the number of repeats of the repeating unit represented by formula (2) and the number of repeats of the repeating unit represented by formula (4).

    ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS
    4.
    发明申请
    ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS 有权

    公开(公告)号：US20220100111A1

    公开(公告)日：2022-03-31

    申请号：US17481652

    申请日：2021-09-22

    Applicant: KYOCERA Document Solutions Inc.

    Inventor： Yuko IWASHITA ,  Kazunari HAMASAKI ,  Jun AZUMA

    IPC: G03G5/047 ,  G03G5/06 ,  G03G21/00

    Abstract: An electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer. The photosensitive layer is a single layer and contains a charge generating material, an electron transport material, a binder resin, and a hole transport material. The electron transport material includes a compound represented by general formula (1): In general formula (1), R1 and R2 each represent, independently of one another, a hydrogen atom, an alkyl group, a heterocyclic group, an alkoxy group, an aralkyl group, an allyl group, or an aryl group optionally substituted with at least 1 and no more than 5 substituents selected from the group consisting of a halogen atom, an alkyl group, and alkoxy group.

    TERPHENYL COMPOUND, ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, AND METHOD FOR PRODUCING TERPHENYL COMPOUND
    5.
    发明申请
    TERPHENYL COMPOUND, ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, AND METHOD FOR PRODUCING TERPHENYL COMPOUND 审中-公开

    公开(公告)号：US20200231535A1

    公开(公告)日：2020-07-23

    申请号：US16632197

    申请日：2018-07-17

    Applicant: KYOCERA Document Solutions Inc.

    Inventor： Jun AZUMA ,  Kensuke KOJIMA ,  Tomofumi SHIMIZU ,  Hideki OKADA

    IPC: C07C211/54 ,  G03G5/047 ,  G03G5/06 ,  G03G5/05 ,  C07C209/06

    Abstract: A compound is represented by general formula (1). In general formula (1), R1 and R2 each represent, independently of one another, a hydrogen atom, a methyl group, or an ethyl group, and a sum of the number of carbon atoms of the chemical group represented by R1 and the number of carbon atoms of the chemical group represented by R2 is 2. R3 and R4 each represent, independently of one another, a hydrogen atom, a methyl group, or an ethyl group, and a sum of the number of carbon atoms of the chemical group represented by R3 and the number of carbon atoms of the chemical group represented by R1 is 2. A photosensitive layer of an electrophotographic photosensitive member contains at least a charge generating material, a hole transport material, and a binder resin. The hole transport material includes a compound represented by general formula (1)

    BIS-BUTADIENE DERIVATIVE AND ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER
    6.
    发明申请
    BIS-BUTADIENE DERIVATIVE AND ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER 审中-公开

    公开(公告)号：US20190384190A1

    公开(公告)日：2019-12-19

    申请号：US16443624

    申请日：2019-06-17

    Applicant: KYOCERA Document Solutions Inc.

    Inventor： Jun AZUMA ,  Kensuke KOJIMA

    IPC: G03G5/06 ,  C07C211/54 ,  G03G5/05

    Abstract: A bis-butadiene derivative is represented by general formula (1) shown below. In general formula (1), Ra, Rb, and Rc each represent, independently of one another, an alkyl group having a carbon number of at least 1 and no greater than 8 or an alkoxy group having a carbon number of at least 1 and no greater than 8. l and m each represent, independently of one another, an integer of at least 0 and no greater than 5. n represents an integer of at least 0 and no greater than 4. Chemical groups Ra may be the same as or different from each other. Chemical groups Rb may be the same as or different from each other. Chemical groups Rc may be the same as or different from each other.

    MULTI-LAYER ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER
    9.
    发明申请
    MULTI-LAYER ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER 有权
    多层电子感光成像

    公开(公告)号：US20170068178A1

    公开(公告)日：2017-03-09

    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: G03G5/05 ,  G03G5/06 ,  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.

    MULTI-LAYER ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS
    10.
    发明申请
    MULTI-LAYER ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS 有权
    多层电子感光元件，工艺盒和图像形成装置

    公开(公告)号：US20170060006A1

    公开(公告)日：2017-03-02

    申请号：US15247373

    申请日：2016-08-25

    Applicant: KYOCERA Document Solutions Inc.

    Inventor： Akihiko OGATA ,  Hideki OKADA ,  Jun AZUMA ,  Kensuke OKAWA

    IPC: G03G15/00

    CPC classification number: G03G5/0614 ,  G03G5/047 ,  G03G5/0525 ,  G03G5/0564 ,  G03G5/0609 ,  G03G5/0672 ,  G03G5/0696

    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 hole transport material and a binder resin. The charge generating material contains a titanyl phthalocyanine that exhibits a main peak at a Bragg angle (2θ±0.2°) of 27.2° in a CuKα characteristic X-ray diffraction spectrum. The hole transport material contains a triarylamine derivative represented by generic formula (1). The hole transport material has a mass ratio of at least 0.30 and no greater than 0.55 relative to the binder resin in the charge transport layer. In general formula (1), R1, R2, l, and m are the same as those defined in the specification.

    Abstract translation: 多层电子照相感光构件包括导电衬底（2）和感光层（3）。 感光层包括电荷产生层（3a）和电荷传输层（3b）。 电荷产生层含有电荷产生材料。 电荷输送层含有空穴传输材料和粘合剂树脂。 电荷产生材料含有在CuK±特征X射线衍射光谱中表现出布拉格角（2±±0.2°）为27.2°的主峰的氧钛酞菁。 空穴传输材料含有由通式（1）表示的三芳基胺衍生物。 空穴传输材料相对于电荷输送层中的粘合剂树脂的质量比为至少0.30且不大于0.55。 在通式（1）中，R 1，R 2，1和m与说明书中定义的相同。

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