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    Photoresponsive compound
    1.
    发明授权
    Photoresponsive compound 有权

    公开(公告)号：US12025909B2

    公开(公告)日：2024-07-02

    申请号：US17664179

    申请日：2022-05-19

    Applicant: Konica Minolta, Inc.

    Inventor： Yukiko Nakai ,  Toyoko Shibata ,  Kazuaki Nakamura ,  Kouji Sugama

    IPC: G03C1/73 ,  C08F220/18 ,  G03G9/08

    CPC classification number: G03C1/733 ,  C08F220/1806 ,  G03G9/08

    Abstract: Provided is a compound which is fluidized by light irradiation and is less colored. The compound is a compound represented by the following general formula (1), which is fluidized by light irradiation:

    R1—CH═N—R2  General Formula (1)



    wherein R1 is a substituted or unsubstituted cyclic hydrocarbon group or a substituted or unsubstituted heterocyclic group; and R2 is a substituted or unsubstituted heterocyclic group containing a nitrogen atom bonded to the nitrogen atom in the general formula (1).

    Electrostatic latent image developing toner
    4.
    发明授权
    Electrostatic latent image developing toner 有权

    公开(公告)号：US10120296B2

    公开(公告)日：2018-11-06

    申请号：US15710259

    申请日：2017-09-20

    Applicant: Konica Minolta, Inc.

    Inventor： Kaori Matsushima ,  Noboru Ueda ,  Shiro Hirano ,  Kouji Sugama

    IPC: G03G9/087 ,  G03G9/08

    Abstract: An electrostatic latent image developing toner includes toner particles which comprises a binder resin and a releasing agent. A main component of the binder resin is a polyester resin. The binder resin comprises a crystalline polyester resin, an amorphous polyester resin and a hybrid vinyl resin. The hybrid vinyl resin is composed of a vinyl polymer segment and at least one segment selected from a polyester polymer segment, an urethane polymer segment and an urea polymer segment which is chemically bound to the vinyl polymer segment. A main component of the hybrid vinyl resin is the vinyl polymer segment which comprises a structural unit derived from a monomer having a specific structure. A tetrahydrofuran-soluble fraction of the toner has a main peak of a molecular weight distribution measured by gel permeation chromatography within the range of 11000 to 30000.

    Toner for electrostatic image development
    5.
    发明授权
    Toner for electrostatic image development 有权
    调色剂用于静电图像显影

    公开(公告)号：US08871415B2

    公开(公告)日：2014-10-28

    申请号：US13864547

    申请日：2013-04-17

    Applicant: Konica Minolta, Inc.

    Inventor： Hiroshi Nagasawa ,  Kouji Sugama ,  Hiroyuki Konno ,  Takaki Kawamura

    IPC: G03G9/087 ,  G03G9/097

    CPC classification number: G03G9/09733 ,  G03G9/08711 ,  G03G9/08728 ,  G03G9/08755 ,  G03G9/08795 ,  G03G9/08797

    Abstract: There is provided a toner for electrostatic-image development that can obtain heat-resistant storability, fixed image strength and long-term stability of charging while having excellent low-temperature fixing property. The toner is formed, with toner particles containing a binder resin and a crystalline ester compound, and the binder resin contains a styrene-acrylic resin including a structural unit derived from an acrylic ester monomer.

    Abstract translation: 提供了一种用于静电图像显影的调色剂，其可以获得耐热储存性，固定图像强度和长期的充电稳定性，同时具有优异的低温定影性能。 调色剂由含有粘合剂树脂和结晶酯化合物的调色剂颗粒形成，并且粘合剂树脂含有包含衍生自丙烯酸酯单体的结构单元的苯乙烯 - 丙烯酸树脂。

    Photoresponsive polymer
    6.
    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

    Applicant: Konica Minolta, Inc.

    Inventor： Kouji Sugama ,  Yukiko Nakai ,  Kazuaki Nakamura ,  Toyoko Shibata

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

    CPC classification number: G03G9/08788 ,  C08F26/06 ,  C08F293/005 ,  G03G9/0874 ,  G03G15/04

    Abstract: 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.

    Process for producing a toner
    8.
    发明授权
    Process for producing a toner 有权

    公开(公告)号：US09983491B2

    公开(公告)日：2018-05-29

    申请号：US15439435

    申请日：2017-02-22

    Applicant: Konica Minolta, Inc.

    Inventor： Junya Onishi ,  Shiro Hirano ,  Noboru Ueda ,  Kouji Sugama ,  Aya Shirai

    IPC: G03G9/08

    CPC classification number: G03G9/0804 ,  G03G9/0815 ,  G03G9/0825 ,  G03G9/08755 ,  G03G9/08795 ,  G03G9/08797

    Abstract: A process for producing a toner of the present invention includes: a first step of heating a dispersion containing an aqueous medium and a binder resin containing a crystalline resin to a temperature higher than or equal to a melting point of the crystalline resin; and a second step of maintaining the dispersion at temperature T (° C.) for 30 minutes or longer in a state where a pH of the dispersion is maintained at 5.5 or higher and 9.0 or lower, in which the temperature T satisfies the following expression, Rc−25≤T≤Rc−5, where the Rc represents a recrystallization temperature (° C.) of the crystalline resin.

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