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公开(公告)号：US12078960B2
公开(公告)日：2024-09-03
申请号：US17493309
申请日：2021-10-04
IPC分类号： G03G9/087 , C08F220/18 , C08F220/46 , C08G63/183 , G03G9/08
CPC分类号： G03G9/08731 , C08F220/1818 , C08F220/46 , C08G63/183 , G03G9/081 , G03G9/0815 , G03G9/0819 , G03G9/0821 , G03G9/08755
摘要： A toner including toner particles having a resin component containing a crystalline resin and an amorphous resin, in which the resin component contains a tetrahydrofuran-insoluble component, and the content of the tetrahydrofuran-insoluble component with respect to the content of the resin component is 5.0% to 80.0% by mass, wherein a maximum endothermic peak temperature of the tetrahydrofuran-insoluble component is 55.0 to 80.0° C., and the amount of heat absorption in the maximum endothermic peak of the tetrahydrofuran-insoluble component is 10.0 to 80.0 J/g, and toner particles have a structure which comprises a matrix containing the crystalline resin and domains containing the amorphous resin.
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公开(公告)号：US11809132B2
公开(公告)日：2023-11-07
申请号：US17197102
申请日：2021-03-10
发明人： Yuujirou Nagashima , Yasuhiro Hashimoto , Koji Nishikawa , Tomoya Nagaoka , Shuntaro Watanabe , Hiroki Akiyama , Hiroki Kagawa
CPC分类号： G03G9/09775 , C08F220/1818 , C08G77/04 , G03G9/0819 , G03G9/0821 , G03G9/08711
摘要： A toner is provided, which has a toner particle that contains a binder resin, and organosilicon polymer particle on a surface of the toner particle. A methanol concentration a (vol %) of the organosilicon polymer particle in a wettability test and a methanol concentration b (vol %) of the toner particle in a wettability test satisfy Expression (I) below:
|a−b|≤25 (I), and
an adhesion index of the organosilicon polymer particle on a polycarbonate film, calculated on the basis of Expression (II) below, is not more than 3.5:
Adhesion index=area ratio c of the organosilicon polymer particle having migrated to the polycarbonate film/coverage ratio d of the organosilicon polymer particle on the surface of the toner particle×100 (II).-
3.发明申请公开(公告)号：US20230115474A1
公开(公告)日：2023-04-13
申请号：US17936088
申请日：2022-09-28
摘要： Provided is an electrophotographic photosensitive member including an electroconductive support, a photosensitive layer, and a protection layer, wherein the protection layer comprises an electroconductive particle, the electroconductive particle has a surface comprising a metal oxide containing a titanium atom and a niobium atom, an atomic concentration ratio of the niobium atom to the titanium atom in the metal oxide is 0.01 to 0.20, the electroconductive particle is surface-treated with a compound having a silicon atom, a content ratio of the electroconductive particle in the protection layer is 5 vol % or more and less than 40 vol % with respect to a total volume of the protection layer, and relative concentrations of a plurality of atoms at a surface of the protection layer, which are determined by X-ray photoelectron spectroscopy, satisfy specific conditions.
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公开(公告)号：US20230068976A1
公开(公告)日：2023-03-02
申请号：US17932603
申请日：2022-09-15
发明人： Hiroyuki Watanabe , Akihiro Maruyama , Tatsuya Yamaai , Kenichi Kaku , Shuntaro Watanabe , Jumpei Kuno , Kazunori Noguchi , Takashi Anezaki , Nobuhiro Nakamura , Kohei Makisumi
IPC分类号： H01G9/20 , C09C1/36 , C09C1/04 , C09C3/06 , H01L51/00 , H01L51/42 , H01L51/44 , H02S10/40 , H02S20/26 , H02S40/32
摘要： The present disclosure provides a photoelectric conversion element including a first electrode 3, a second electrode 7, a photoelectric conversion layer 5 between the first electrode 3 and the second electrode 7, and a reflection layer 6 between one of the first electrode 3 and the second electrode 7 and the photoelectric conversion layer 5. The wavelength at which the reflectance of the reflection layer 6 is maximum in the visible region is within the range of wavelengths in which the optical absorption coefficient of the photoelectric conversion layer 5 is ⅕ or more of the maximum optical absorption coefficient in the visible region.
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公开(公告)号：US20210055667A1
公开(公告)日：2021-02-25
申请号：US16987902
申请日：2020-08-07
发明人： Shuntaro Watanabe , Hiroki Akiyama , Hiroki Kagawa
IPC分类号： G03G9/087
摘要： A toner comprising a resin that contains an amorphous segment and a crystalline segment as a binder resin, wherein a proportion of a tetrahydrofuran-insoluble matter of a resin component is from 40% by mass to 80% by mass; in differential scanning calorimeter measurement of the tetrahydrofuran-insoluble matter, where a temperature of a maximum endothermic peak is denoted by Tm [° C.] and an endothermic quantity is denoted by H(I) [J/g], the following formulas (1) and (2) are satisfied: 55.0≤Tm≤80.0 (1) 10.0≤H(I)≤80.0 (2).
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公开(公告)号：US10768540B2
公开(公告)日：2020-09-08
申请号：US16272254
申请日：2019-02-11
发明人： Shuntaro Watanabe , Tatsuya Saeki , Atsuhiko Ohmori , Shuhei Moribe , Hiroki Akiyama , Kazumichi Nakahama , Katsuhisa Yamazaki
摘要： Provided is an external additive having a resin particle containing a crystalline resin, and an inorganic fine particle containing a metal atom, the inorganic fine particle being embedded in the resin particle, wherein part of the inorganic fine particle being exposed on a surface of the resin particle, the maximum endothermic peak temperature of the external additive during a first temperature rise is from 50.0° C. to 120° C., the shape factor SF-2 of the external additive is from 110 to 150, and the external additive satisfies following formulae (1) and (2) below, in which Za (mass %) is the percentage content of a metal atom contained in the inorganic fine particle on the surface of the external additive in X-ray photoelectron spectroscopy, and Zb (mass %) is the percentage content of the metal atom in thermogravimetric analysis of the external additive, Za≥15 (1), and Za/Zb≥0.7 (2)
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公开(公告)号：US09811016B2
公开(公告)日：2017-11-07
申请号：US15071981
申请日：2016-03-16
发明人： Kenji Aoki , Tetsuya Kinumatsu , Yusuke Kosaki , Shuntaro Watanabe , Noritaka Toyoizumi , Takaaki Kaya , Atsushi Tani , Takashige Kasuya
CPC分类号： G03G9/09371 , G03G9/0821 , G03G9/08755
摘要： A toner comprising a toner particle comprising a binder resin that comprises a crystalline resin, wherein the toner satisfies the following formulas (1) and (2) in DSC measurement of the toner, 50.0≦Tt≦80.0 formula (1) 0.00≦ΔHT′t-3/ΔH≦0.20 formula (2) where Tt [° C.] is the peak temperature of the endothermic peak P1, ΔH [J/g] is the endothermic quantity from a temperature lower than T′t by 20.0° C. to a temperature higher than T′t by 10.0° C. when T′t [° C.] is the peak temperature of the endothermic peak P 2, and ΔH T′t-3 [J/g] is the endothermic quantity from a temperature lower than T′t by 20.0° C. to a temperature lower than T′t by 3.0° C.
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公开(公告)号：US09798262B2
公开(公告)日：2017-10-24
申请号：US14973531
申请日：2015-12-17
发明人： Noritaka Toyoizumi , Yusuke Kosaki , Tetsuya Kinumatsu , Kenji Aoki , Shuntaro Watanabe , Takaaki Kaya , Atsushi Tani , Kazumichi Nakahama , Shinnosuke Koji , Takashige Kasuya
CPC分类号： G03G9/09392 , C08J3/126 , C08J2367/02 , C08J2467/02 , C08J2483/06 , C08J2483/07 , C08L67/02 , G03G9/09328
摘要： Provided is a method of producing a toner including the steps of: mixing a resin solution comprising a resin R, a colorant, and an organic solvent, a resin fine particle comprising a resin S containing an element α, and carbon dioxide to form a droplet having a surface covered with the resin fine particle; introducing carbon dioxide in a liquid state and pressurizing to extract the organic solvent in the droplet; and removing the extracted organic solvent together with the carbon dioxide to provide a toner particle. In the method of producing a toner, when the resin fine particle is treated with the carbon dioxide in a liquid state, a change in amount of the element α on the surface of the resin fine particle after the treatment as compared to the amount before the treatment falls within a specific range.
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9.发明申请公开(公告)号：US20160187797A1
公开(公告)日：2016-06-30
申请号：US14973521
申请日：2015-12-17
发明人： Yusuke Kosaki , Tetsuya Kinumatsu , Kenji Aoki , Noritaka Toyoizumi , Shuntaro Watanabe , Takaaki Kaya , Atsushi Tani , Takashige Kasuya , Kazumichi Nakahama , Shinnosuke Koji
CPC分类号： G03G9/09371 , G03G9/0804 , G03G9/09392
摘要： Provided is a toner, comprising a toner particle having a core-shell structure composed of a core particle and a shell phase on a surface of the core particle, the core particle containing a resin X and a colorant, the shell phase being derived from a resin fine particle containing a resin Y, in which a relationship among a SP value of the resin X, a SP value of the resin Y, and a SP value of an organic solvent falls within a specific range, and a relationship between a number-average particle diameter of the resin fine particle when the resin fine particle is dispersed in water and a number-average particle diameter of the resin fine particle when the resin fine particle is dispersed in the organic solvent falls within a specific range.
摘要翻译： 提供一种调色剂，其包含在核心颗粒的表面上具有由核心颗粒和壳相组成的核 - 壳结构的调色剂颗粒，所述核颗粒含有树脂X和着色剂，所述壳相衍生自 树脂X的SP值与树脂Y的SP值与有机溶剂的SP值之间的关系落在特定范围内的树脂Y的树脂微粒， 当树脂细颗粒分散在水中时树脂细颗粒的平均粒径和当树脂细颗粒分散在有机溶剂中时树脂细颗粒的数均粒径落在特定范围内。
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公开(公告)号：US20210255557A1
公开(公告)日：2021-08-19
申请号：US17168523
申请日：2021-02-05
发明人： Shuntaro Watanabe , Hiroki Akiyama , Hiroki Kagawa
摘要： A magnetic toner comprising a magnetic toner particle including a binder resin, a magnetic body and a crystalline polyester, wherein in cross-sectional observation of the magnetic toner particle using a transmission electron microscope, a variation coefficient CV3 of an occupied area ratio of the magnetic body when a cross section of the magnetic toner particle is divided by a square grid having a side of 0.8 μm is from 40.0% to 80.0%, and assuming that a storage elastic modulus at 40° C. is taken as E′(40) [Pa] and a storage elastic modulus at 85° C. is taken as E′(85) [Pa], the storage elastic moduli being obtained in a powder dynamic viscoelasticity measurement of the magnetic toner, the following formulas (1) and (2) are satisfied. E′(85)≤2.0×109 (1) [E′(40)−E′(85)]×100/E′(40)≥70 (2)
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