公开(公告)号：US11661478B2

公开(公告)日：2023-05-30

申请号：US16489931

申请日：2018-02-06

Applicant: SHOWA DENKO K.K.

Inventor： Takuya Minami ,  Yoshishige Okuno ,  Yuta Yamaguchi ,  Ryuuta Miyasaka ,  Naoya Fukumoto ,  Hiroko Hattori ,  Hiroyuki Tomita ,  Michio Seri ,  Naoko Ito ,  Ichiro Ota ,  Katsumi Murofushi

IPC: C08G65/331 ,  C08G65/333 ,  C10M107/38 ,  G11B5/725 ,  C10N40/18

CPC classification number: C08G65/331 ,  C08G65/333 ,  C10M107/38 ,  G11B5/7257 ,  C10N2040/18

Abstract: A fluorine-containing ether compound of the present invention is represented by the following General Formula (1). (In the General Formula (1), X is a trivalent atom or a trivalent atom group, A is a linking group including at least one polar group, B is a linking group having a perfluoropolyether chain, and D is a polar group or a substituent having a polar group at the end.)

[Chem. 1]

XA-B-D)3  (1)

公开(公告)号：US11555005B2

公开(公告)日：2023-01-17

申请号：US16489896

申请日：2018-02-08

Applicant: SHOWA DENKO K.K.

Inventor： Naoya Fukumoto ,  Ryuuta Miyasaka ,  Hiroyuki Tomita ,  Michio Seri ,  Naoko Ito ,  Katsumi Murofushi

IPC: C07C43/13 ,  C08G65/337 ,  G11B5/725 ,  C10M107/38

Abstract: A fluorine-containing ether compound according to the present invention is a fluorine-containing ether compound represented by the following General Formula (1).

公开(公告)号：US11279664B2

公开(公告)日：2022-03-22

申请号：US16082349

申请日：2017-01-30

Applicant: SHOWA DENKO K.K.

Inventor： Daisuke Yagyu ,  Yuta Yamaguchi ,  Naoya Fukumoto ,  Tsuyoshi Kato ,  Shoko Uetake ,  Hiroyuki Tomita ,  Ryuuta Miyasaka ,  Naoko Ito ,  Ichiro Ota ,  Katsumi Murofushi

IPC: C07C43/23 ,  C10M105/54 ,  G11B5/725 ,  C10M107/38 ,  C07C43/178 ,  C07D277/24 ,  C07D303/26 ,  C07D333/16 ,  C07D409/12 ,  G11B5/733 ,  C10N30/06 ,  C10N40/18 ,  C10N50/00

Abstract: The present invention relates to a fluorine-containing ether compound represented by Formula (1), R1—R2—CH2—R3—CH2—R4  (1). (In Formula (1), R1 is an end group including an organic group having at least one double bond or triple bond, R2 is a divalent linking group bonded to R1 by etheric oxygen, R3 is a perfluoropolyether chain, R4 is an end group having two or three polar groups with each polar group being bonded to different carbon atoms, and the carbon atoms, to which the polar groups are bonded, being bonded to each other via a linking group including carbon atoms to which the polar groups are not bonded.)

公开(公告)号：US11427779B2

公开(公告)日：2022-08-30

申请号：US16480483

申请日：2018-01-05

Applicant: SHOWA DENKO K.K.

Inventor： Yuta Yamaguchi ,  Daisuke Yagyu ,  Naoya Fukumoto ,  Shoko Uetake ,  Tsuyoshi Kato ,  Hiroyuki Tomita ,  Ryuuta Miyasaka ,  Katsumi Murofushi

IPC: C10M107/46 ,  G11B5/72 ,  G11B5/725 ,  C10N40/18 ,  C07D213/68 ,  C07D231/12 ,  C07D277/24 ,  C07D333/16 ,  C07D409/12 ,  C08G65/333 ,  C08G65/334 ,  C10M107/44

Abstract: A fluorine-containing ether compound represented by Formula (1) is provided. R1—R2—CH2—R3—CH2—R4—R5   (1) (In Formula (1), R1 and R5 each represents a group having a heterocyclic ring and may be the same as or different from each other, R2 and R4 each represents a divalent linking group having a polar group and play be the same as or different from each other, and R3 represents a perfluoropolyether chain.)

公开(公告)号：US11220649B2

公开(公告)日：2022-01-11

申请号：US16480464

申请日：2017-12-04

Applicant: SHOWA DENKO K.K.

Inventor： Naoya Fukumoto ,  Daisuke Yagyu ,  Yuta Yamaguchi ,  Shoko Uetake ,  Tsuyoshi Kato ,  Hiroyuki Tomita ,  Ryuuta Miyasaka ,  Katsumi Murofushi

IPC: C10M105/54 ,  C07C43/178 ,  G11B5/725 ,  C08G65/331 ,  C10M107/38 ,  C10N20/04 ,  C10N30/06 ,  C10N50/00 ,  C10N40/18

Abstract: A fluorine-containing ether compound represented by Formula (1) is provided; R1—R2—CH2—R3—CH2—R4—R5  (1) (In Formula (1), R1 and R5 may be the same as or different from each other and each represents an alkenyl group having 2 to 8 carbon atoms or an alkynyl group having 3 to 8 carbon atoms, R2 and R4 may be the same as or different from each other and each represents a divalent linking group having a polar group, and R3 represents a perfluoropolyether chain, with a proviso that R1 and R2 are, and R4 and R5 are divided due to the presence of an atom other than the carbon atom such as an oxygen atom).

公开(公告)号：US11180457B2

公开(公告)日：2021-11-23

申请号：US16759515

申请日：2018-08-28

Applicant: SHOWA DENKO K.K.

Inventor： Tsuyoshi Kato ,  Daisuke Yagyu ,  Naoya Fukumoto ,  Yuta Yamaguchi ,  Masumi Kuritani ,  Katsumi Murofushi ,  Masaki Nanko ,  Hiroyuki Tomita

IPC: C07D231/12 ,  C07D277/24 ,  C07D333/16 ,  C10M107/24 ,  C10M107/38 ,  C10M107/40 ,  C10M107/46 ,  G11B5/725

Abstract: Provided is a fluorine-containing ether compound capable of forming a lubricant layer having excellent wear resistance even when the thickness is thin, and suitable as a material of a lubricant for a magnetic recording medium. The fluorine-containing ether compound is a compound represented by the following formula (1): R1—R2—CH2—R3—CH2—R4—R5; wherein R3 is a perfluoropolyether chain; R1 is a terminal group bonded to R2; R5 is a terminal group bonded to R4; R1 is an alkenyl group or an alkynyl group; R5 is a group containing a heterocyclic ring; R2 is represented by the following formula (2); R4 is represented by the following formula (3); and a in the formula (2) and b in the formula (3) are each independently an integer of 1 to 3.

公开(公告)号：US10803898B2

公开(公告)日：2020-10-13

申请号：US15664013

申请日：2017-07-31

Applicant: SHOWA DENKO K.K.

Inventor： Naoya Fukumoto ,  Daisuke Yagyu ,  Yuta Yamaguchi ,  Shoko Uetake ,  Tsuyoshi Kato ,  Hiroyuki Tomita ,  Ryuta Miyasaka ,  Katsumi Murofushi

IPC: G11B5/66 ,  G11B5/725 ,  C07D303/28 ,  C07D303/18 ,  C07C43/11 ,  C10M147/04 ,  C08G65/00 ,  C07C43/13 ,  C08G65/26 ,  C10M105/54 ,  C10N20/04 ,  C10N40/18 ,  C10N50/00

Abstract: A fluorine-containing ether compound of the present invention is represented by Formula (1). R1—CH2—R2—CH2—R3  (1) (In Formula (1), R1 is an organic end group having 3 or more carbon atoms which includes two or more polar groups with each polar group being bonded to different carbon atoms and the carbon atoms to which the polar groups are bonded being bonded to each other via a linking group including the carbon atoms which are not bonded to the polar groups, R2 includes a perfluoropolyether chain represented by Formula (3), and R3 is a hydroxyl group or R1) —(CF2)y−1—O—((CF2)yO)z—(CF2)y−1—  (3) (In Formula (3), y represents an integer of 2 to 4, and z represents an integer of 1 to 30).

公开(公告)号：US11719768B2

公开(公告)日：2023-08-08

申请号：US17691504

申请日：2022-03-10

Applicant: SHOWA DENKO K.K.

Inventor： Isao Kabe ,  Hiroyuki Tomita

IPC: G01R33/06 ,  G01R33/00

CPC classification number: G01R33/063 ,  G01R33/0023

Abstract: A magnetic sensor 10 includes: a non-magnetic substrate 11; a sensitive circuit 12 provided on a surface of the substrate 11 and including a sensitive part 121 sensing a magnetic field by a magnetic impedance effect; a terminal part 13a and a terminal part 13b connected to respective both end portions of the sensitive circuit 12; and a conductive returning member with one end portion being connected to the terminal part 13a, the returning member returning back toward the terminal part 13b.

公开(公告)号：US11719767B2

公开(公告)日：2023-08-08

申请号：US17457299

申请日：2021-12-02

Applicant: SHOWA DENKO K.K.

Inventor： Daizo Endo ,  Hiroyuki Tomita

IPC: G01R33/60 ,  G01R33/06

CPC classification number: G01R33/063

Abstract: The sensitivity of a magnetic sensor using a sensitive element sensing a magnetic field by the magnetic impedance effect is increased. The magnetic sensor includes: a sensitive element sensing a magnetic field by a magnetic impedance effect; and a focusing member provided to face the sensitive element, configured with a soft magnetic material, and focusing magnetic force lines from outside onto the sensitive element.

公开(公告)号：US11639330B2

公开(公告)日：2023-05-02

申请号：US16640132

申请日：2018-07-30

Applicant: SHOWA DENKO K.K.

Inventor： Masaki Nanko ,  Naoya Fukumoto ,  Daisuke Yagyu ,  Yuta Yamaguchi ,  Tsuyoshi Kato ,  Hiroyuki Tomita ,  Katsumi Murofushi ,  Shohei Nishizawa

IPC: C07C255/13 ,  G11B5/725 ,  C07C43/205 ,  C07C255/17 ,  C07C255/19 ,  C07C255/50 ,  C07D333/16 ,  C08G65/08 ,  C10M107/38 ,  C10N40/18

Abstract: Provided is a fluorine-containing ether compound that can be suitably used as a material for a lubricant for a magnetic recording medium, capable of forming a lubricant layer having excellent chemical substance resistance and wear resistance even when the thickness is small. A fluorine-containing ether compound represented by the following formula (1): R1—R2—CH2—R3—CH2—R4—R5  (1) In the formula (1), R3 is a perfluoropolyether chain. R2 and R4 are divalent linkage groups having a polar group, and may be the same or different. R1 and R5 are terminal groups bonded to R2 or R4, which may be the same or different, and at least one of R1 and R5 is an organic group having 1 to 8 carbon atoms wherein one or more hydrogen atoms of the organic group is substituted with a cyano group.