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    TONER
    6.
    发明公开
    TONER 审中-公开

    公开(公告)号：US20240219853A1

    公开(公告)日：2024-07-04

    申请号：US18391396

    申请日：2023-12-20

    申请人： CANON KABUSHIKI KAISHA

    发明人： YU YOSHIDA ,  NAOYA ISONO ,  SHOTARO NOMURA

    IPC分类号： G03G9/087 ,  G03G9/097

    CPC分类号： G03G9/08711 ,  G03G9/08755 ,  G03G9/09733

    摘要： A toner includes toner particles containing a crystalline organic material that contains a crystalline vinyl resin as an essential component and a crystalline polyester and a wax component as optional components. A total of the crystalline vinyl resin, crystalline polyester, and wax component with respect to the toner particles is 10.0 to 90.0 mass %. The crystalline vinyl resin contains a crystalline resin A having (i) units A and (ii) units B. The toner particles contain 0.0020 to 0.0500 mass % of a metal that can form a complex with an acetylacetonate moiety in a unit B of the crystalline resin A with respect to a mass of the toner particles. The acetylacetonate moiety of at least one of the units B in the crystalline resin A forms a complex with the metal. In the crystalline resin A, a content of the unit B is 0.50 to 10.0 mass %.

    TONER
    7.
    发明公开
    TONER 审中-公开

    公开(公告)号：US20240192617A1

    公开(公告)日：2024-06-13

    申请号：US18502515

    申请日：2023-11-06

    申请人： CANON KABUSHIKI KAISHA

    发明人： TATSUYA SAEKI ,  KENJI AOKI ,  NAOYA ISONO ,  MARIKO YAMASHITA ,  YUKI MASUDA ,  MEGUMI MORIYA

    IPC分类号： G03G9/087 ,  G03G9/08

    CPC分类号： G03G9/08711 ,  G03G9/0819

    摘要： A toner comprises a toner particle, wherein the toner contains a crystalline vinyl resin and an amorphous resin, a weight-average particle diameter of the toner is from 4.0 to 12.0 m, an endothermic quantity ΔH derived from the crystalline vinyl resin is from 10 to 70 J/g, and in an analysis by time-of-flight secondary ion mass spectrometry of the toner particle while under sputtering, with A(100) as the ion amount of a specific hydrocarbon over a sputtering time during which 100 nm of a polymethyl methacrylate standard sample film are shaved, the ion amount exhibits one or more peak values, and with A(dmax) as a maximum value from among the peak values, the above A(dmax) and A(100) satisfy the expression below.


    1.5≤A(dmax)/A(100)≤30.0

    Photoresponsive polymer
    8.
    发明授权
    Photoresponsive polymer 有权

    公开(公告)号：US11994827B2

    公开(公告)日：2024-05-28

    申请号：US17658563

    申请日：2022-04-08

    申请人： Konica Minolta, Inc.

    发明人： Kouji Sugama ,  Yukiko Nakai ,  Kazuaki Nakamura ,  Toyoko Shibata

    IPC分类号： G03G9/087 ,  C08F26/06 ,  C08F293/00 ,  G03G15/04

    CPC分类号： G03G9/08788 ,  C08F26/06 ,  C08F293/005 ,  G03G9/0874 ,  G03G15/04

    摘要： A photoresponsive polymer includes a structural unit represented by the following general formula (1), the photoresponsive polymer being fluidized by light irradiation, and reversibly non-fluidized:

    [Chemical formula 1]

    R1—Z1═Z2—R2  General formula (1)



    in the formula,
    Z1 and Z2 each represent CH or N, and Z1≠Z2,
    R1 represents an aromatic hydrocarbon group having a substituent Ra selected from the group consisting of an alkyl group, an alkoxy group, and a halogen atom at each of two ortho positions with respect to Z1,
    R2 represents an aromatic heterocyclic group with or without a substituent, and
    at least one of the R1 and the R2 is bonded to a group containing a structure derived from a polymerizable group.

    Toner
    9.
    发明授权
    Toner 有权

    公开(公告)号：US11971684B2

    公开(公告)日：2024-04-30

    申请号：US17287592

    申请日：2019-10-21

    申请人： ZEON CORPORATION

    发明人： Kojiro Akazaki

    IPC分类号： G03G9/087 ,  G03G9/09 ,  G03G9/097

    CPC分类号： G03G9/08706 ,  G03G9/08728 ,  G03G9/09 ,  G03G9/09741

    摘要： Provided is toner which has good low-temperature fixability, shelf stability and hot offset resistance, and which suppresses a decrease in glossiness of an image. The toner comprising colored resin particles containing a binder resin, a colorant, a softening agent and a charge control agent, and an external additive, wherein a glass transition temperature (Tg) specified from a temperature dependence curve of a loss tangent (tan δ) obtained by dynamic viscoelastic measurement of the toner, is 50° C. or more and less than 90° C.; the loss tangent (tan δ) at the glass transition temperature (Tg) is 1.70 or less; in a temperature range of 90° C. or more and 160° C. or less, a lowest temperature (Ta) with a loss tangent of 1.50 is more than 95° C. and less than 145° C.; and a storage elastic modulus (G′) at the lowest temperature (Ta) is less than 56000 Pa.

    IMAGE FORMING APPARATUS AND PROCESS CARTRIDGE
    10.
    发明公开
    IMAGE FORMING APPARATUS AND PROCESS CARTRIDGE 审中-公开

    公开(公告)号：US20240118653A1

    公开(公告)日：2024-04-11

    申请号：US18180902

    申请日：2023-03-09

    申请人： FUJIFILM Business Innovation Corp.

    发明人： Keisuke Kusano ,  Wataru Yamada ,  Masahiro Iwasaki ,  Akihiro Kawasaki ,  Yuki Oyamada

    IPC分类号： G03G15/00 ,  G03G9/087 ,  G03G15/01 ,  G03G15/02 ,  G03G15/04 ,  G03G15/16

    CPC分类号： G03G15/6597 ,  G03G9/0872 ,  G03G15/0121 ,  G03G15/0233 ,  G03G15/04036 ,  G03G15/1685

    摘要： An image forming apparatus includes an electrophotographic photoreceptor that includes a conductive substrate and a photosensitive layer disposed on the conductive substrate, the electrophotographic photoreceptor having an outermost surface layer that contains a binder resin, a charge-transporting material, and a fluorine-containing resin particle, the fluorine-containing resin particle containing 0 or more and 30 or less carboxy groups per 106 carbon atoms, a charging device that charges the electrophotographic photoreceptor, an electrostatic latent image forming device that forms an electrostatic latent image on the electrophotographic photoreceptor that is charged, a developing device that houses a developer containing a toner and that develops, with the developer, the electrostatic latent image formed on the electrophotographic photoreceptor into a toner image, a transfer device that transfers the toner image onto a transfer-receiving medium, and an optical discharging device that, after the toner image is transferred onto the transfer-receiving medium and before the electrophotographic photoreceptor is charged, irradiates the electrophotographic photoreceptor with discharging light with a light quantity of 1.0 μW or more and 50.0 μW or less to perform discharging.