公开(公告)号：US09880478B2

公开(公告)日：2018-01-30

申请号：US15393455

申请日：2016-12-29

Applicant: CANON KABUSHIKI KAISHA

Inventor： Tsutomu Shimano ,  Kunihiko Nakamura ,  Kenta Kamikura ,  Yuichi Yajima ,  Kenji Ookubo ,  Dai Nozaki ,  Tohru Hiramatsu

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

CPC classification number: G03G9/0812 ,  G03G9/0806 ,  G03G9/0815 ,  G03G9/0819 ,  G03G9/08711 ,  G03G9/08755 ,  G03G9/0918 ,  G03G9/09708

Abstract: Provided is a method of producing a toner including a toner particle, the method including: a granulation step of mixing a polymerizable monomer composition containing a polymerizable monomer and an aqueous medium to form a suspension of particles of the polymerizable monomer composition; and a polymerization step of polymerizing the polymerizable monomer in each of the particles of the polymerizable monomer composition in the presence of a metal phosphate containing aluminum as a metal element to provide the toner particle, the content ratio of aluminum in the metal phosphate containing aluminum being 1.0 mol % or more and 95.0 mol % or less with respect to all metal elements, the metal phosphate containing aluminum being obtained by adding an aluminum compound to the aqueous medium and/or the suspension.

公开(公告)号：US20230014130A1

公开(公告)日：2023-01-19

申请号：US17808807

申请日：2022-06-24

Applicant: CANON KABUSHIKI KAISHA

Inventor： Tomohisa Sano ,  Kazuyuki Sato ,  Tohru Hiramatsu

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

Abstract: A toner comprising a toner particle comprising a binder resin, a crystalline material, and a silica particle, wherein a number average particle diameter D1 of the silica particle comprised in the toner particle is 400 to 3000 nm; the silica particle has a pointed portion; and the crystalline material comprises a compound having an ester group.

公开(公告)号：US12111614B2

公开(公告)日：2024-10-08

申请号：US17530670

申请日：2021-11-19

Applicant: CANON KABUSHIKI KAISHA

Inventor： Tohru Hiramatsu ,  Tomohisa Sano ,  Kazuyuki Sato

IPC: G03G9/083 ,  G03G9/087

CPC classification number: G03G9/0836 ,  G03G9/0833 ,  G03G9/08708 ,  G03G9/08755

Abstract: There is provided a toner containing: a toner particle containing a binder resin, a releasing agent, and a colorant; and an iron oxide particle present on a surface of the toner particle, in which the iron oxide particle has a surface containing a compound having a specific structure.

公开(公告)号：US20220171303A1

公开(公告)日：2022-06-02

申请号：US17530670

申请日：2021-11-19

Applicant: CANON KABUSHIKI KAISHA

Inventor： Tohru Hiramatsu ,  Tomohisa Sano ,  Kazuyuki Sato

IPC: G03G9/083 ,  G03G9/087

Abstract: There is provided a toner containing: a toner particle containing a binder resin, a releasing agent, and a colorant; and an iron oxide particle present on a surface of the toner particle, in which the iron oxide particle has a surface containing a compound having a specific structure.

公开(公告)号：US20170199474A1

公开(公告)日：2017-07-13

申请号：US15393455

申请日：2016-12-29

Applicant: CANON KABUSHIKI KAISHA

Inventor： Tsutomu Shimano ,  Kunihiko Nakamura ,  Kenta Kamikura ,  Yuichi Yajima ,  Kenji Ookubo ,  Dai Nozaki ,  Tohru Hiramatsu

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

CPC classification number: G03G9/0812 ,  G03G9/0806 ,  G03G9/0815 ,  G03G9/0819 ,  G03G9/08711 ,  G03G9/08755 ,  G03G9/0918 ,  G03G9/09708

Abstract: Provided is a method of producing a toner including a toner particle, the method including: a granulation step of mixing a polymerizable monomer composition containing a polymerizable monomer and an aqueous medium to form a suspension of particles of the polymerizable monomer composition; and a polymerization step of polymerizing the polymerizable monomer in each of the particles of the polymerizable monomer composition in the presence of a metal phosphate containing aluminum as a metal element to provide the toner particle, the content ratio of aluminum in the metal phosphate containing aluminum being 1.0 mol % or more and 95.0 mol % or less with respect to all metal elements, the metal phosphate containing aluminum being obtained by adding an aluminum compound to the aqueous medium and/or the suspension.

公开(公告)号：US20220171302A1

公开(公告)日：2022-06-02

申请号：US17524353

申请日：2021-11-11

Applicant: CANON KABUSHIKI KAISHA

Inventor： Kazuyuki Sato ,  Tomohisa Sano ,  Daisuke Yoshiba ,  Tohru Hiramatsu

IPC: G03G9/08 ,  G03G9/087 ,  G03G9/097 ,  G03G9/083

Abstract: The toner is a toner including a toner particle comprising a binder resin, a crystalline material, wherein, when a ratio of an area occupied by the crystalline material in a toner surface observed with a scanning electron microscope after ruthenium-staining the toner under a specific condition (1) is represented by S1 (%), a ratio of an area occupied by the crystalline material in the toner surface observed with the scanning electron microscope after ruthenium-staining the toner under a condition (2) is represented by S2 (%), and a dispersion diameter of a plurality of domains formed of the crystalline material on the toner surface observed with the scanning electron microscope after the ruthenium-staining the toner under the condition (2) is represented by R2 (nm), the following expressions (1), (2), and (3) are satisfied. 0 . 0 ≤ S 1 ≤ 0.5 ( 1 ) 1.0 ≤ S 2 ≤ 10.0 ( 2 ) 20 ≤ R 2 ≤ 200 ( 3 )