公开(公告)号：US12049551B2

公开(公告)日：2024-07-30

申请号：US17265664

申请日：2019-08-06

Applicant: Cabot Corporation

Inventor： Hairuo Tu ,  Jincheng Xiong ,  Paul S. Palumbo ,  Dmitry Fomitchev

IPC: G03G9/097 ,  C08K3/36 ,  C08K9/06 ,  C09C1/30 ,  G03G9/08

CPC classification number: C08K3/36 ,  C08K9/06 ,  C09C1/3081 ,  G03G9/0821 ,  G03G9/09708 ,  G03G9/09716 ,  C08K2201/002 ,  C08K2201/005 ,  C08K2201/009

Abstract: Metal oxide-polymer composite particles have a median particle size D50 of 40-75 nm or 100-150 nm and an average RTA of at least 0.06. Alternatively or in addition, metal oxide-polymer composites comprise two or more populations of metal oxide particles differing in size, particle size distribution, or shape. Alternatively or in addition, the use of a multicomponent hydrophobizing system including an alkylsilane to fabricate metal oxide-polymer composite particles increases the tribocharge of the composite particles.

公开(公告)号：US20240241458A1

公开(公告)日：2024-07-18

申请号：US18415077

申请日：2024-01-17

Applicant: Tsukiko TAKAHASHI ,  Daisuke INOUE ,  Keiji MAKABE ,  Taishi YAMASHITA ,  Shuto SUNAGA

Inventor： Tsukiko TAKAHASHI ,  Daisuke INOUE ,  Keiji MAKABE ,  Taishi YAMASHITA ,  Shuto SUNAGA

IPC: G03G9/097 ,  G03G9/08 ,  G03G9/087

CPC classification number: G03G9/09708 ,  G03G9/0827 ,  G03G9/08755 ,  G03G9/09733 ,  G03G2215/0604

Abstract: A toner contains a mother toner particle containing a resin, a colorant, and a wax and



an inorganic external additive on the surface of the mother toner particle, wherein the following relationships are satisfied:











20

公开(公告)号：US20240219857A1

公开(公告)日：2024-07-04

申请号：US18396571

申请日：2023-12-26

Applicant: CANON KABUSHIKI KAISHA

Inventor： TOMOHISA SANO ,  TOHRU HIRAMATSU ,  ATSUHIKO OHMORI ,  KOSUKE FUKUDOME ,  HIROKI KAGAWA

IPC: G03G9/097 ,  G03G9/087

CPC classification number: G03G9/09775 ,  G03G9/08711 ,  G03G9/09708 ,  G03G9/09733

Abstract: A toner includes a toner particle containing a binder resin and an external additive. A fragment peak derived from a boron atom and a fragment peak derived from a boron-oxygen structure are detected by time-of-flight secondary ion mass spectrometry (TOF-SIMS) measurement of the toner. The toner particle contains dodecylbenzenesulfonic acid or a dodecylbenzenesulfonic acid salt. Hydrotalcite is contained as the external additive.

公开(公告)号：US20240192621A1

公开(公告)日：2024-06-13

申请号：US18551358

申请日：2022-05-18

Applicant: LOTTE FINE CHEMICAL CO., LTD.

Inventor： Dae Woong Choi ,  Ji Soo Lee

IPC: G03G9/093 ,  G03G9/097

CPC classification number: G03G9/09385 ,  G03G9/09307 ,  G03G9/09708

Abstract: A toner external additive composition of the present invention comprises, as a core component, tin oxide, to be usable as an alternative material for conventional titanium dioxide (TiO2), and thus can respond to future regulations on titanium dioxide and environment. In addition, the toner external additive composition and a toner composition comprising same comprise, as a shell component, a silane-based compound and aluminum hydroxide to reduce triboelectric charge so that a ghost phenomenon is alleviated and increase image density so that print quality is improved. Particularly, if aluminum hydroxide is used in a specific amount range, a print quality improvement effect can be further improved.

公开(公告)号：US20240184227A1

公开(公告)日：2024-06-06

申请号：US18576301

申请日：2022-03-31

Applicant: KYOCERA Document Solutions Inc.

Inventor： Kohei TERASAKI ,  Tamotsu SHIMIZU ,  Yusuke KURANO ,  Masashi YAMASHITA ,  Yuma UCHIHASHI

IPC: G03G9/113 ,  G03G9/08 ,  G03G9/097

CPC classification number: G03G9/1139 ,  G03G9/0819 ,  G03G9/09708 ,  G03G9/1135

Abstract: In a two-component developer, toner particles include toner mother particles and external additive particles including strontium titanate particles. A first percentage content being a percentage content of the strontium titanate particles to the mass of the toner mother particles is 0.30-0.90% by mass. The carrier particles include carrier cores and coat layers. The coat layers contain barium titanate particles and a coating resin including a silicone resin. The barium titanate particles have a number average primary particle diameter of 100-500 nm. A second percentage content being a percentage content of the coat layers to the mass of the carrier cores is 2.0-4.0% by mass. A third percentage content being a percentage content of the barium titanate to the mass of the coating resin satisfies formula (1) “(X×10)≤Z≤45.0”. In formula (1), X represents the first percentage content and Z represents the third percentage content.

公开(公告)号：US11899395B2

公开(公告)日：2024-02-13

申请号：US18053846

申请日：2022-11-09

Applicant: CANON KABUSHIKI KAISHA

Inventor： Kenta Kamikura ,  Takashi Kenmoku ,  Noritaka Toyoizumi ,  Akane Masumoto ,  Yuzo Seino ,  Yu Yoshida

IPC: G03G9/097 ,  G03G9/08 ,  G03G9/087

CPC classification number: G03G9/0825 ,  G03G9/0821 ,  G03G9/08773 ,  G03G9/09708

Abstract: A toner comprising a toner particle, wherein the toner particle includes a toner base particle containing a binder resin and includes a protruded portion on a surface of the toner base particle; the protruded portion comprises an organosilicon polymer and a polyhydric acid metal salt; and the polyhydric acid metal salt is present on a surface of the protruded portion.

公开(公告)号：US11768447B2

公开(公告)日：2023-09-26

申请号：US17371238

申请日：2021-07-09

Applicant: Konica Minolta, Inc.

Inventor： Shiro Hirano ,  Takanari Kayamori ,  Yuya Kubo

IPC: G03G9/09 ,  G03G9/087 ,  G03G9/097 ,  G03G9/08

CPC classification number: G03G9/0906 ,  G03G9/0821 ,  G03G9/08711 ,  G03G9/08755 ,  G03G9/0904 ,  G03G9/0926 ,  G03G9/09708

Abstract: The toner for developing an electrostatic charge image of the present invention contains a toner base particle comprising a binder resin and at least two kinds of organic pigments, and alumina as an external additive. The at least two kinds of organic pigments comprises: a pigment P1 having an absorption maximum wavelength λmax (nm) of greater than 400 nm and less than 600 nm when dispersed in methyl ethyl ketone; and a pigment P2 having an absorption maximum wavelength λ max (nm) of 600 nm or more and 700 nm or less when dispersed in methyl ethyl ketone.

公开(公告)号：US20230152725A1

公开(公告)日：2023-05-18

申请号：US18053462

申请日：2022-11-08

Applicant: CANON KABUSHIKI KAISHA

Inventor： Kouichirou Ochi ,  Masayuki Hama ,  Yuka Gunji ,  Hayato Ida ,  Kaoru Yoshida

IPC: G03G9/097 ,  G03G9/087 ,  G03G9/09 ,  G03G9/08

CPC classification number: G03G9/09733 ,  G03G9/08755 ,  G03G9/0918 ,  G03G9/0819 ,  G03G9/09708 ,  G03G9/081

Abstract: A toner comprising a toner particle comprising an organic pigment and a binder resin, wherein, in a solid-state NMR measurement at 60° C. using a solid fraction obtained by specific procedure for dissolving the toner in chloroform as a sample, a transverse relaxation time T2 of a peak observed between 1.5 and 2.5 ppm is from 0.08 to 0.13 ms.

公开(公告)号：US20190137902A1

公开(公告)日：2019-05-09

申请号：US16138485

申请日：2018-09-21

Applicant: Konica Minolta, Inc.

Inventor： Koji Shibata ,  Shinya Obara ,  Satoshi Uchino

IPC: G03G9/113 ,  G03G9/08 ,  G03G9/107 ,  G03G9/083

CPC classification number: G03G9/1133 ,  G03G9/0819 ,  G03G9/0823 ,  G03G9/0827 ,  G03G9/0834 ,  G03G9/08755 ,  G03G9/09708 ,  G03G9/09716 ,  G03G9/1075 ,  G03G9/1139

Abstract: Provided is a two-component developer for developing an electrostatic latent image incorporating: toner particles each containing a toner mother particle having an external additive on a surface of the toner mother particle; and carrier particles each having a core material particle and a covering layer containing a resin on a surface of the core material particle, wherein the external additive contains inorganic particles; the inorganic particles are subjected to surface modification with silicone oil; a carbon content remained on a surface of the inorganic particle after the surface modification is within 3.0 to 10.0 mass %; a free carbon ratio on the surface of the inorganic particle is 70.0% or more; the carrier particles have a resistance in the range of 1.0×109 to 5.0×1010 Ω·cm; and the resin in the covering layer contains a resin formed from a monomer containing an alicyclic methacrylic acid ester monomer.

公开(公告)号：US20180275596A1

公开(公告)日：2018-09-27

申请号：US15650322

申请日：2017-07-14

Applicant: FUJI XEROX CO., LTD.

Inventor： Makoto KAMISAKI ,  Manabu FURUKI ,  Naoki OTA ,  Tatsuhiro IGARASHI ,  Yasuhisa MOROOKA ,  Jun SEKIYA

IPC: G03G21/00 ,  G03G9/097 ,  G03G9/08

CPC classification number: G03G21/0029 ,  G03G9/0819 ,  G03G9/0827 ,  G03G9/09708 ,  G03G9/09716 ,  G03G9/09725 ,  G03G9/09733 ,  G03G9/09791 ,  G03G21/0011

Abstract: An image forming apparatus includes an image forming unit including an image carrier, a developing device that includes a developer containing a toner, and a cleaning device including a blade; and a transfer device. The toner contains toner particles having a volume-average particle size of 3 μm or more and 5 μm or less, a spherical inorganic external additive having a number-average particle size of 80 nm to 200 nm, and an organic component. In the cleaning device, an external additive residue in or near a contact region between the image carrier and the blade contains the organic component and an inorganic component, the area ratio of the organic component to the inorganic component is 3/7 or more and 7/3 or less, and the area ratio of the inorganic component that is spherical to the external additive residue is 30% or more.