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    ELECTROPHOTOGRAPHIC PHOTORECEPTOR, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS
    1.
    发明公开
    ELECTROPHOTOGRAPHIC PHOTORECEPTOR, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS 审中-公开

    公开(公告)号：US20240248419A1

    公开(公告)日：2024-07-25

    申请号：US18362566

    申请日：2023-07-31

    申请人： FUJIFILM Business Innovation Corp

    发明人： Ryosuke FUJII ,  Tomoya Sasaki ,  Hiroko Kobayashi ,  Yuto Okazaki ,  Kosuke Narita

    IPC分类号： G03G5/05 ,  C08G63/54 ,  C08G64/06

    CPC分类号： G03G5/056 ,  C08G63/54 ,  C08G64/06 ,  G03G5/0564

    摘要： An electrophotographic photoreceptor contains a conductive substrate, and a lamination type photosensitive layer disposed on the conductive substrate and including a charge generation layer and a charge transport layer, in which the charge transport layer contains a charge transport material, at least one of a polyester resin or a polycarbonate resin that has a constitutional unit containing biphenyl represented by Formula (1), and an aromatic dicarboxylic acid represented by Formula (2),






    in Formula (1), j represents an integer of 0 or greater and 4 or less, j pieces of R11's each independently represent a methyl group or an ethyl group, k represents an integer of 0 or greater and 4 or less, and k pieces of R12's each independently represent a methyl group or an ethyl group,
    in Formula (2), p represents an integer of 0 or greater and 4 or less, p pieces of R21's each independently represent a methyl group or an ethyl group, q represents an integer of 0 or greater and 4 or less, q pieces of R22's each independently represent a methyl group or an ethyl group, r represents an integer of 0 or greater and 4 or less, r pieces of R23's each independently represent a methyl group or an ethyl group, and n represents 0 or 1.

    Particle-dispersed polyimide precursor solution, method for producing porous polyimide film, and porous polyimide film
    2.
    发明授权
    Particle-dispersed polyimide precursor solution, method for producing porous polyimide film, and porous polyimide film 有权

    公开(公告)号：US12018128B2

    公开(公告)日：2024-06-25

    申请号：US17380016

    申请日：2021-07-20

    申请人： FUJIFILM Business Innovation Corp.

    发明人： Tomoya Sasaki ,  Hidekazu Hirose ,  Kosaku Yoshimura ,  Yasunobu Kashima ,  Hajime Sugahara ,  Kosuke Nakada ,  Tomoyo Okubo

    IPC分类号： C08G73/10 ,  C08J5/18 ,  C08J9/26

    CPC分类号： C08G73/1067 ,  C08G73/1021 ,  C08G73/1032 ,  C08G73/1042 ,  C08J5/18 ,  C08J9/26 ,  C08J2201/046 ,  C08J2379/08

    摘要： A particle-dispersed polyimide precursor solution contains a polyimide precursor having a unit represented by the following formula (I), particles, and a solvent, in which the particle-dispersed polyimide precursor solution satisfies both the following conditions (1) and (2),






    (in the formula (I), A represents a tetravalent organic group, and B represents a divalent organic group represented by any of the following formulas (B1) to (B4)),










    (in the formulas (B1) to (B4), Ar1, Ar10, and Ar11 each independently represent a trivalent aromatic group which may have a substituent, Ar2, Ar4, Ar5, Ar7 and Ar8 each independently represent a divalent aromatic group which may have a substituent, Ar3 and Ar6 each independently represent a tetravalent aromatic group which may have a substituent or a group represented by the following formula (II), Ar9 represents a divalent aromatic group which may have a substituent or a group represented by the following formula (III), X1 to X7 each independently represent NRa, O, or S, Ra represents a hydrogen atom, an alkyl group which may have a substituent, or an aryl group, and * represents a bonding site with an adjacent linking group), and










    (in the formulas (II) and (III), Ar12 and Ar13 each independently represent a trivalent aromatic group which may have a substituent, Ar14 and Ar15 each independently represent a divalent aromatic group which may have a substituent, Y and Z each independently represent O, S, S(═O)2, or CRbRc, Rb and Rc each independently represent a hydrogen atom, an alkyl group which may have a substituent, or an aryl group, and * represents a bonding site with an adjacent linking group),
    Condition (1): a total content of the groups represented by the formulas (B1) to (B4) is 1% by mass or more and 40% by mass or less with respect to a total amount of the polyimide precursor, and
    Condition (2): a content of the particles is 5% by mass or more and 90% by mass or less with respect to a total content of the polyimide precursor and the particles.

    ELECTROPHOTOGRAPHIC PHOTORECEPTOR, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS
    4.
    发明公开
    ELECTROPHOTOGRAPHIC PHOTORECEPTOR, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS 审中-公开

    公开(公告)号：US20240036488A1

    公开(公告)日：2024-02-01

    申请号：US18304352

    申请日：2023-04-21

    申请人： FUJIFILM Business Innovation Corp.

    发明人： Hiroko Kobayashi ,  Tomoya Sasaki ,  Yuto Okazaki ,  Ryosuke Fujii ,  Kosuke Narita

    IPC分类号： G03G5/05 ,  G03G21/18

    CPC分类号： G03G5/056 ,  G03G5/0564 ,  G03G21/1814

    摘要： An electrophotographic photoreceptor includes a conductive substrate, and a lamination type photosensitive layer disposed on the conductive substrate and including a charge generation layer and a charge transport layer, in which the charge transport layer contains a charge transport material, a polyester resin, and a polycarbonate resin, and the polyester resin includes the following polyester resin (1),



    polyester resin (1): a polyester resin having at least one selected from the group including a diol unit (B3) represented by Formula (B3), a diol unit (B5) represented by Formula (B5), a diol unit (B6) represented by Formula (B6), a diol unit (B7) represented by Formula (B7), a diol unit (B8) represented by Formula (B8), a diol unit (B9) represented by Formula (B9), a diol unit (B10) represented by Formula (B10), and a diol unit (B11) represented by Formula (B11),













    in Formula (B3), Rb113 and Rb213 each independently represent a hydrogen atom, a linear alkyl group having 1 or more and 3 or less carbon atoms, an alkoxy group having 1 or more and 4 or less carbon atoms, or a halogen atom, d represents an integer of 7 or greater and 15 or less, and Rb403, Rb503, Rb803, and Rb903 each independently represent a hydrogen atom, an alkyl group having 1 or more and 4 or less carbon atoms, an alkoxy group having 1 or more and 6 or less carbon atoms, or a halogen atom,
    in Formula (B5), Ar105 represents an aryl group having 6 or more and 12 or less carbon atoms or an aralkyl group having 7 or more and 20 or less carbon atoms, Rb205 represents a hydrogen atom or an alkyl group having 1 or more and 3 or less carbon atoms, and Rb405, Rb505, Rb805, and Rb905 each independently represent a hydrogen atom, an alkyl group having 1 or more and 4 or less carbon atoms, an alkoxy group having 1 or more and 6 or less carbon atoms, or a halogen atom,
    in Formula (B6), Rb116 and Rb216 each independently represent a hydrogen atom, a linear alkyl group having 1 or more and 3 or less carbon atoms, an alkoxy group having 1 or more and 4 or less carbon atoms, or a halogen atom, e represents an integer of 4 or greater and 6 or less, and Rb406, Rb506, Rb806, and Rb906 each independently represent a hydrogen atom, an alkyl group having 1 or more and 4 or less carbon atoms, an alkoxy group having 1 or more and 6 or less carbon atoms, or a halogen atom,
    in Formula (B7), Rb407, Rb507, Rb807, and Rb907 each independently represent a hydrogen atom, an alkyl group having 1 or more and 4 or less carbon atoms, an alkoxy group having 1 or more and 6 or less carbon atoms, or a halogen atom,
    in Formula (B8), Rb408, Rb508, Rb808, and Rb908 each independently represent a hydrogen atom, an alkyl group having 1 or more and 4 or less carbon atoms, an alkoxy group having 1 or more and 6 or less carbon atoms, or a halogen atom,
    in Formula (B9), Rb109 represents an alkyl group having 1 or more and 8 or less carbon atoms, Rb209 represents an alkyl group having 1 or more and 3 or less carbon atoms, and Rb409, Rb509, Rb809, and Rb909 each independently represent a hydrogen atom, an alkyl group having 1 or more and 4 or less carbon atoms, an alkoxy group having 1 or more and 6 or less carbon atoms, or a halogen atom,
    in Formula (B10), Rb110 represents an alkyl group having 9 or more and 20 or less carbon atoms, Rb210 represents a hydrogen atom or an alkyl group having 1 or more and 3 or less carbon atoms, and Rb410, Rb510, Rb810, and Rb910 each independently represent a hydrogen atom, an alkyl group having 1 or more and 4 or less carbon atoms, an alkoxy group having 1 or more and 6 or less carbon atoms, or a halogen atom,
    in Formula (B11), Rb411, Rb511, Rb811, and Rb911 each independently represent a hydrogen atom, an alkyl group having 1 or more and 4 or less carbon atoms, an alkoxy group having 1 or more and 6 or less carbon atoms, or a halogen atom.