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1.发明授权公开(公告)号：US10331054B2
公开(公告)日：2019-06-25
申请号：US15493282
申请日：2017-04-21
Applicant: CANON KABUSHIKI KAISHA
Inventor： Shohei Urushihara , Masaki Yamada , Takashi Koyanagi , Hideya Arimura
Abstract: The present invention provides an electrophotographic member which has a high ability to impart charge to toners while the charge imparting ability is unlikely to be reduced even under an environment at high temperature and high humidity.The electrophotographic member comprises a substrate, an elastic layer formed on the substrate, an intermediate layer covering the surface of the elastic layer, and a surface layer covering the surface of the intermediate layer, wherein the intermediate layer contains a binder resin and a polymer having a specific structure, the surface layer contains silicon oxide, and the surface layer has a thickness of 10 nm or more and 300 nm or less.
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公开(公告)号：US10067430B2
公开(公告)日：2018-09-04
申请号：US15363135
申请日：2016-11-29
Applicant: CANON KABUSHIKI KAISHA
Inventor： Hideya Arimura , Shohei Urushihara , Masaki Yamada
Abstract: A member for electrophotography has an electro-conductive base and at least one electro-conductive resin layer, in which the electro-conductive resin layer of the outermost layer contains urethane resin and the urethane resin has a structure of a silicone graft fluororesin and a structure represented by Formula (1)
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公开(公告)号：US20180217551A1
公开(公告)日：2018-08-02
申请号：US15934272
申请日：2018-03-23
Applicant: CANON KABUSHIKI KAISHA
Inventor： Hideya Arimura , Masaki Yamada , Sosuke Yamaguchi , Kazuhiro Yamauchi , Satoru Nishioka
IPC: G03G21/00 , G03G15/06 , B32B27/06 , B32B7/00 , G03G15/08 , G03G15/16 , G03G15/02 , B32B27/10 , B32B7/12 , B32B29/00
CPC classification number: G03G21/0017 , B32B7/00 , B32B7/12 , B32B27/06 , B32B27/10 , B32B29/00 , B32B2250/00 , B32B2255/00 , B32B2255/12 , B32B2307/58 , B32B2307/75 , B32B2419/00 , B32B2451/00 , B32B2471/00 , B32B2607/00 , B32B2607/02 , G03G15/02 , G03G15/0233 , G03G15/06 , G03G15/0812 , G03G15/0818 , G03G15/1685
Abstract: Provided is an electrophotographic member that has a high excessive charging-suppressing effect under a low-temperature and low-humidity environment, and has high charge-providing performance under a high-temperature and high-humidity environment, and a process cartridge and an electrophotographic apparatus each including the electrophotographic member. The electrophotographic member is an electrophotographic member including an electro-conductive substrate and an electro-conductive resin layer, the electro-conductive resin layer contains a cation and at least one anion selected from the group consisting of anions represented by the following formulae (1) to (5): where X represents an arbitrary halogen atom, n in the structural formula (4) represents an integer of from 2 to 6, and n in the structural formula (5) represents an integer of 2 or 3.
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公开(公告)号：US09977359B2
公开(公告)日：2018-05-22
申请号：US15421570
申请日：2017-02-01
Applicant: CANON KABUSHIKI KAISHA
Inventor： Takashi Koyanagi , Masaki Yamada , Shohei Urushihara , Hideya Arimura
IPC: G03G15/02 , C08F226/06 , C09D139/04 , C09D175/04 , G03G15/08 , C08G18/48 , C08G18/62 , C08G18/69 , C08G18/42 , C08G18/44
CPC classification number: G03G15/0233 , C08F226/06 , C08G18/42 , C08G18/44 , C08G18/4825 , C08G18/4854 , C08G18/6216 , C08G18/69 , C09D139/04 , C09D175/04 , G03G15/0818 , C08K3/04 , C08F2220/1883 , C08F230/08
Abstract: Provided is an electrophotographic member that is excellent in charge-imparting performance for a toner, and that hardly causes tackiness on its surface even when placed under a high-temperature and high-humidity environment over a long time period. The electrophotographic member includes a substrate and a surface layer, in which the surface layer satisfies the following requirements (A) and (B): (A) the surface layer contains, in a region from its surface to a depth of up to 0.1 μm, a copolymer containing a constituent unit represented by the following structural formula (1), and at least one selected from the group consisting of a constituent unit represented by the following structural formula (2) and a constituent unit represented by the following structural formula (3); and (B) the concentration of a nitrogen atom derived from a nitrogen-containing aromatic heterocyclic amine structure in the copolymer is from 6.0 mass % to 30.0 mass %.
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公开(公告)号：US20170227880A1
公开(公告)日：2017-08-10
申请号：US15421570
申请日：2017-02-01
Applicant: CANON KABUSHIKI KAISHA
Inventor： Takashi Koyanagi , Masaki Yamada , Shohei Urushihara , Hideya Arimura
IPC: G03G15/02 , G03G15/08 , C09D175/04 , C08F226/06 , C09D139/04
CPC classification number: G03G15/0233 , C08F226/06 , C08G18/42 , C08G18/44 , C08G18/4825 , C08G18/4854 , C08G18/6216 , C08G18/69 , C09D139/04 , C09D175/04 , G03G15/0818 , C08K3/04 , C08F2220/1883 , C08F230/08
Abstract: Provided is an electrophotographic member that is excellent in charge-imparting performance for a toner, and that hardly causes tackiness on its surface even when placed under a high-temperature and high-humidity environment over a long time period. The electrophotographic member includes a substrate and a surface layer, in which the surface layer satisfies the following requirements (A) and (B): (A) the surface layer contains, in a region from its surface to a depth of up to 0.1 μm, a copolymer containing a constituent unit represented by the following structural formula (1), and at least one selected from the group consisting of a constituent unit represented by the following structural formula (2) and a constituent unit represented by the following structural formula (3); and (B) the concentration of a nitrogen atom derived from a nitrogen-containing aromatic heterocyclic amine structure in the copolymer is from 6.0 mass % to 30.0 mass %.
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Patent Agency Ranking
公开(公告)号：US09665028B2
公开(公告)日：2017-05-30
申请号：US14257993
申请日：2014-04-21
Applicant: CANON KABUSHIKI KAISHA
Inventor： Hideya Arimura , Masaki Yamada , Kazuhiro Yamauchi , Satoru Nishioka
CPC classification number: G03G15/02 , G03G15/0818 , G03G21/18 , Y10T428/294
Abstract: An electrophotographic member having a high conductivity and having high adhesiveness to other layer, and a process cartridge and an electrophotographic apparatus using the electrophotographic member as a developer carrying member are provided.The electrophotographic member is an electrophotographic member including an electro-conductive mandrel and an electro-conductive layer, wherein the electro-conductive layer has a resin having a structure represented by the following structural formula (1), and an anion.
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7.发明授权公开(公告)号：US11022904B2
公开(公告)日：2021-06-01
申请号：US16516763
申请日：2019-07-19
Applicant: CANON KABUSHIKI KAISHA
Inventor： Hideya Arimura , Masaki Yamada , Hiroaki Komatsu
IPC: G03G5/10 , G03G15/00 , G03G21/18 , C08K5/3445
Abstract: Provided an electrophotographic member having an excellent electroconductivity and being capable of forming a high quality electrophotographic image even in long-term use. The electrophotographic member comprises an electroconductive substrate and an electroconductive layer on the substrate, the electroconductive layer containing a matrix polymer, and a specific imidazolium salt.
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公开(公告)号：US20190302644A1
公开(公告)日：2019-10-03
申请号：US16365936
申请日：2019-03-27
Applicant: CANON KABUSHIKI KAISHA
Inventor： Masaki Yamada , Hiroaki Komatsu , Hideya Arimura
Abstract: The electrophotographic member includes an electro-conductive substrate, a urethane resin having a structure of structural formula (1), an anion, and a resin particle, and has a protrusion derived from the resin particle on an outer surface thereof, the resin particle contains one or both of a urethane resin and a polyamide resin, the resin layer further contains carbon black, and the carbon black extracted from the resin layer has a BET specific surface area of 33 m2/g or more and 133 m2/g or less, and DBP absorption amount at a 70% torque value in DBP absorption measurement of 42 ml/100 g or more and 90 ml/100 g or less.
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公开(公告)号：US09811009B2
公开(公告)日：2017-11-07
申请号：US14708981
申请日：2015-05-11
Applicant: CANON KABUSHIKI KAISHA
Inventor： Masaki Yamada , Sosuke Yamaguchi , Hideya Arimura , Kazuhiro Yamauchi , Satoru Nishioka
IPC: G03G5/04 , G03G15/00 , B05C1/08 , C09D175/04 , G03G5/043 , G03G5/05 , G03G15/02 , G03G15/08 , G03G15/16
CPC classification number: G03G5/043 , C09D175/04 , G03G5/0575 , G03G15/0233 , G03G15/0818 , G03G15/162 , G03G15/1685
Abstract: The present invention provides an electrophotographic member in which an increase in resistance is small even in use at low temperature and which contributes to the formation of a high quality electrophotographic image, and a process cartridge and an electrophotographic apparatus using this electrophotographic member as a charging member or a developer carrying member. Therefore, the electrophotographic member of the present invention is an electrophotographic member including an electro-conductive mandrel and an electro-conductive layer, wherein the electro-conductive layer includes a urethane resin and an ion-conductive agent, the urethane resin has, between two adjacent urethane bonds, a structure represented by formula (1) and at least one structure selected from the group consisting of a structure represented by formula (2) and a structure represented by formula (3), and the ion-conductive agent contains a particular anion.
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公开(公告)号：US09639009B2
公开(公告)日：2017-05-02
申请号：US14715033
申请日：2015-05-18
Applicant: CANON KABUSHIKI KAISHA
Inventor： Sosuke Yamaguchi , Masaki Yamada , Hideya Arimura , Kazuhiro Yamauchi , Satoru Nishioka
CPC classification number: G03G5/043 , G03G15/0233 , G03G15/0818
Abstract: The present invention provides a highly electro-conductive electrophotographic member which contributes to formation of high-quality electrophotographic images while bleeding out of an ion conducting agent is reduced, a process cartridge, and an electrophotographic apparatus. Accordingly, the electrophotographic member according to the present invention includes an electro-conductive mandrel and an electro-conductive layer, wherein the electro-conductive layer contains a resin synthesized from a nitrogen-containing aromatic heterocyclic cation and a compound being able to react with the nitrogen-containing aromatic heterocyclic cation, and an anion; the nitrogen-containing aromatic heterocyclic cation has two substituents bonded to hydroxyl groups; and the substituent bonded to the hydroxyl group is bonded to a nitrogen atom of a nitrogen-containing aromatic heterocycle of the nitrogen-containing aromatic heterocyclic cation.
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