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公开(公告)号：US20230317332A1
公开(公告)日：2023-10-05
申请号：US18191096
申请日：2023-03-28
Applicant: SEIKO EPSON CORPORATION
Inventor： Yasunari IKEDA , Michio NAKAMORI , Hirofumi HOKARI
CPC classification number: H01F1/15383 , B22F1/052 , B22F1/08 , B22F1/147 , B22F1/07 , B22F2009/0804
Abstract: A magnetic bead contains: a magnetic metal powder; and a coating layer with which a particle surface of the magnetic metal powder is coated. When the magnetic bead is left to stand in a state of a dispersion obtained by dispersing the magnetic bead in water, a time until an initial absorbance of the dispersion attenuates to 80% of an absorbance when the standing is started is 90 seconds or longer.
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公开(公告)号：US20230317331A1
公开(公告)日：2023-10-05
申请号：US18191086
申请日：2023-03-28
Applicant: SEIKO EPSON CORPORATION
Inventor： Sukenori ICHIKAWA , Akira ARAI , Michio NAKAMORI
CPC classification number: H01F1/15383 , B22F1/16 , B22F1/05 , B22F9/082 , H01F1/15308 , B22F1/08 , B22F1/07 , B22F2009/0828 , B22F2203/11 , B22F2301/35 , B22F2302/256
Abstract: A magnetic bead contains: a Fe-based magnetic metal powder; and a coating layer with which a particle surface of the Fe-based magnetic metal powder is coated. The Fe-based magnetic metal powder contains a crystal grain having a grain diameter of 1 nm or more and 60 nm or less in a ratio of 30% by volume or more and 100% by volume or less. In addition, the coating layer may contain an oxide and has an average thickness of 10 nm or more and 200 nm or less.
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公开(公告)号：US20200239718A1
公开(公告)日：2020-07-30
申请号：US16775317
申请日：2020-01-29
Applicant: Seiko Epson Corporation
Inventor： Kenji KITADA , Hiroko HAYASHI , Yasunari IKEDA , Hisashi OKAMURA , Kenta KIKUCHI , Hirofumi HOKARI , Shinichi NAITO , Kazumasa OTSUKI , Michio NAKAMORI , Shinichi YAMAMOTO , Seiji KAGAMI , Shigeki KAWADA
IPC: C09D11/328 , C08K5/3415 , C08K5/1515 , C08K5/13 , C08L71/02 , C08K5/42
Abstract: An aqueous ink jet composition of the present disclosure includes: at least one dye selected from the group consisting of C.I. Solvent Yellow 160:1, C.I. Disperse Yellow 82, and C.I. Disperse Yellow 184; a material A which is at least one compound selected from the group consisting of a compound represented by the following formula (1), a compound represented by the following formula (2), an ethylene oxide adduct of tristyrylphenol, a derivative of an ethylene oxide adduct of tristyrylphenol, a polyalkylene glycol, and a derivative of a polyalkylene glycol; and an anionic dispersant.
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