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公开(公告)号：US11624987B2
公开(公告)日：2023-04-11
申请号：US17020253
申请日：2020-09-14
Applicant: CANON KABUSHIKI KAISHA
Inventor： Yuzo Tokunaga , Takashi Hirasa , Yasutaka Akashi , Masato Nakajima , Naohiko Tsuchida , Akifumi Matsubara , Kohji Takenaka , Yuya Chimoto , Kouichirou Ochi , Tomoyo Miyakai
IPC: G03G9/13
Abstract: A liquid developer comprising: a toner particle containing binder resin; a carrier liquid; and a basic toner particle dispersing agent, wherein the basic toner particle dispersing agent is a primary amine, an acid value of the binder resin is at least 10 mg KOH/g, an acid value of a component having a molecular weight of not more than 2,000 contained in the binder resin is not more than 5 mg KOH/g, and a hydroxyl value of the component having a molecular weight of not more than 2,000 contained in the binder resin is not more than 10 mg KOH/g.
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公开(公告)号：US20200272068A1
公开(公告)日：2020-08-27
申请号：US16794925
申请日：2020-02-19
Applicant: CANON KABUSHIKI KAISHA
Inventor： Kouichirou Ochi , Yuzo Tokunaga , Tomoyo Miyakai , Akifumi Matsubara , Takashi Hirasa , Hayato Ida , Yasutaka Akashi
Abstract: A liquid developer containing a liquid carrier and a toner particle that is insoluble in the liquid carrier, wherein a particular substructure is bonded through a covalent bond to a surface of the toner particle, and a method of producing a liquid developer containing a liquid carrier and a toner particle that is insoluble in the liquid carrier, the method comprising a step (I) of covalently bonding, to a surface of the toner particle, a compound having a particular substructure.
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公开(公告)号：US20170371260A1
公开(公告)日：2017-12-28
申请号：US15628708
申请日：2017-06-21
Applicant: CANON KABUSHIKI KAISHA
Inventor： Naohiko Tsuchida , Yasutaka Akashi , Yuzo Tokunaga
CPC classification number: G03G9/122 , G03G9/132 , G03G9/135 , G03G9/1355 , G03G15/10
Abstract: A liquid developer comprising a toner particle containing a binder resin and a carbon black, a toner particle dispersing agent, and a carrier liquid, wherein amounts of group 15 elements, group 16 elements, and group 17 elements on a surface of the carbon black are respectively 0.1 atomic percent or less with respect to a total amount of elements on the carbon black surface.
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公开(公告)号：US20220269189A1
公开(公告)日：2022-08-25
申请号：US17666326
申请日：2022-02-07
Applicant: CANON KABUSHIKI KAISHA
Inventor： Yuu Nishimura , Yuzo Tokunaga , Nobuyoshi Sugahara , Hironori Minagawa , Nobuhiro Yoshida
IPC: G03G9/113
Abstract: A magnetic carrier comprises a magnetic carrier core and a coating resin layer coating a surface of the magnetic carrier core. The coating resin layer contains resin A and resin B at contents of 1% to 50% by mass and 50% to 90% by mass, respectively, based on resin components of the coating resin layer. The resin A has a first partial structure and a second partial structure, while the resin B has a third partial structure and a fourth partial structure. The mass X of the resin A, the total mass Ma of the first partial structure, and the total mass Mb of the second partial structure satisfy 0.50≤(Ma+Mb)/X≤1.00 and 0.10≤a/b≤30.0, and the SP value of the first partial structure SPa1 and the SP value of the third partial structure SPb3 satisfy 0≤|SPa1—SPb3|≤10.0.
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公开(公告)号：US11181848B2
公开(公告)日：2021-11-23
申请号：US16794925
申请日：2020-02-19
Applicant: CANON KABUSHIKI KAISHA
Inventor： Kouichirou Ochi , Yuzo Tokunaga , Tomoyo Miyakai , Akifumi Matsubara , Takashi Hirasa , Hayato Ida , Yasutaka Akashi
Abstract: A liquid developer containing a liquid carrier and a toner particle that is insoluble in the liquid carrier, wherein a particular substructure is bonded through a covalent bond to a surface of the toner particle, and a method of producing a liquid developer containing a liquid carrier and a toner particle that is insoluble in the liquid carrier, the method comprising a step (I) of covalently bonding, to a surface of the toner particle, a compound having a particular substructure.
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Patent Agency Ranking
公开(公告)号：US20210063906A1
公开(公告)日：2021-03-04
申请号：US16996461
申请日：2020-08-18
Applicant: CANON KABUSHIKI KAISHA
Inventor： Yuzo Tokunaga , Tomoyo Miyakai , Takashi Hirasa , Hayato Ida , Yasutaka Akashi
Abstract: A liquid developer that can show excellent adhesiveness with respect to plastic film media even if a base layer is not formed, the liquid developer includes a toner particle and a carrier liquid, where the toner particle contains a resin including a monomer unit (1) represented by the formula (1).
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公开(公告)号：US20180348658A1
公开(公告)日：2018-12-06
申请号：US15988116
申请日：2018-05-24
Applicant: CANON KABUSHIKI KAISHA
Inventor： Naohiko Tsuchida , Takashi Hirasa , Yasutaka Akashi , Yuzo Tokunaga , Akifumi Matsubara , Ryo Natori , Waka Hasegawa , Ayano Mashida , Junji Ito , Yasuhiro Aichi , Jun Shirakawa
Abstract: A curable liquid developer containing: a toner particle containing a pigment and a binder resin; a toner particle dispersing agent; and a cationically polymerizable liquid monomer, wherein the binder resin contains a polyester resin having an acid value of at least 5 mg KOH/g; the polyester resin contains an alcohol component-derived monomer unit and an acid component-derived monomer unit; the alcohol component-derived monomer unit and the acid component-derived monomer unit contain specific monomer units in specific proportions; and the content of the polyester resin in the binder resin is at least 50 mass % and not more than 100 mass %.
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公开(公告)号：US09946175B2
公开(公告)日：2018-04-17
申请号：US15128914
申请日：2015-03-23
Applicant: CANON KABUSHIKI KAISHA
Inventor： Koichi Nakata , Shinji Takagi , Yuzo Tokunaga , Masaki Nonaka , Ryoichi Tokimitsu
CPC classification number: G03G5/07 , G03G5/0564 , G03G5/0603 , G03G5/0605 , G03G5/0609 , G03G5/0614 , G03G5/0618 , G03G5/0696 , G03G5/14743 , G03G21/18
Abstract: To provide an electrophotographic photosensitive member which satisfies abrasion resistance and electrical properties and which is difficult to cause image deletion. A surface layer of the electrophotographic photosensitive member of this invention contains a polymerized product of a hole transporting compound having a polymerizable functional group, in which the hole transporting compound is at least one compound selected from the group consisting of: a compound consisting of one or more carbon atoms, one or more hydrogen atoms, and one or more halogen atoms; and a compound consisting of one or more carbon atoms, one or more hydrogen atoms, one or more oxygen atoms, and one or more halogen atoms.
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公开(公告)号：US20210080848A1
公开(公告)日：2021-03-18
申请号：US17012718
申请日：2020-09-04
Applicant: CANON KABUSHIKI KAISHA
Inventor： Naohiko Tsuchida , Takashi Hirasa , Yasutaka Akashi , Masato Nakajima , Yuzo Tokunaga , Kohji Takenaka , Akifumi Matsubara , Yuya Chimoto , Kouichirou Ochi , Tomoyo Miyakai
Abstract: A liquid developer containing: a toner containing a binder resin; a carrier liquid; and a basic toner dispersing agent, wherein the binder resin contains a polylactic acid, the polylactic acid has an acid value of at least 5 mg KOH/g, and a content of the polylactic acid in the binder resin is at least 50 mass %.
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公开(公告)号：US20210033995A1
公开(公告)日：2021-02-04
申请号：US16936250
申请日：2020-07-22
Applicant: CANON KABUSHIKI KAISHA
Inventor： Yuzo Tokunaga , Tomoyo Miyakai , Takashi Hirasa , Hayato Ida , Yasutaka Akashi
IPC: G03G9/125
Abstract: A liquid developer contains toner particles containing a binder resin and a colorant, a liquid carrier, a toner-particle dispersant, and a compound represented by formula (1). The liquid carrier contains at least one selected from the group consisting of liquid aliphatic hydrocarbons and liquid polysiloxanes. The toner-particle dispersant is an amine-based dispersant.
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