公开(公告)号：US11555005B2

公开(公告)日：2023-01-17

申请号：US16489896

申请日：2018-02-08

申请人： SHOWA DENKO K.K.

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

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

摘要： 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

申请人： SHOWA DENKO K.K.

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

IPC分类号： 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

摘要： 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

申请人： SHOWA DENKO K.K.

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

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

摘要： 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

申请人： SHOWA DENKO K.K.

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

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

摘要： 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

申请人： SHOWA DENKO K.K.

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

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

摘要： 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

申请人： SHOWA DENKO K.K.

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

IPC分类号： 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

摘要： 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：US11639330B2

公开(公告)日：2023-05-02

申请号：US16640132

申请日：2018-07-30

申请人： SHOWA DENKO K.K.

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

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

摘要： 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.

公开(公告)号：US20220308127A1

公开(公告)日：2022-09-29

申请号：US17691504

申请日：2022-03-10

申请人： SHOWA DENKO K.K.

发明人： Isao Kabe ,  Hiroyuki Tomita

IPC分类号： G01R33/06 ,  G01R33/00

摘要： 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：US11292979B2

公开(公告)日：2022-04-05

申请号：US15999837

申请日：2017-02-20

申请人： SHOWA DENKO K.K.

发明人： Yuta Yamaguchi ,  Naoya Fukumoto ,  Naoko Ito ,  Hiroyuki Tomita ,  Ichiro Ota ,  Katsumi Murofushi

IPC分类号： C10M105/54 ,  C07C43/13 ,  G11B5/725 ,  C10N40/18

摘要： A fluorine-containing ether compound represented by a formula (1) shown below. R4—CH2—R3—CH2—R2—CH2—R1—CH2—R2—CH2—R3—CH2—R5  (1) In formula (1), R1 and R3 represent the same or different perfluoropolyether chains, R2 represents a linking group containing at least one polar group, one or both of R4 and R5 represent a terminal group containing two or more polar groups, and R4 and R5 are different.

公开(公告)号：US11514945B2

公开(公告)日：2022-11-29

申请号：US16489919

申请日：2018-02-20

申请人： SHOWA DENKO K.K.

发明人： Hiroyuki Tomita ,  Hiroko Hattori ,  Naoya Fukumoto ,  Ryuuta Miyasaka ,  Naoko Ito ,  Ichiro Ota ,  Katsumi Murofushi

IPC分类号： G11B5/84 ,  G11B5/72 ,  C08G65/332 ,  C08G65/333 ,  C10M107/38 ,  G11B5/725

摘要： A lubricant for a magnetic recording medium capable of forming a lubricant layer having excellent adhesion to a protective layer is provided. A lubricant for a magnetic recording medium contains a fluorine-containing ether compound in which a group having an ethylenic carbon-carbon double bond is disposed at one or both terminals of a perfluoroalkyl polyether chain. It is preferable that the group having the ethylenic carbon-carbon double bond is disposed at one terminal of the perfluoroalkyl polyether chain, and a hydroxyl group is disposed at other terminal. It is preferable that the lubricant for a magnetic recording medium contains a compound in which one or more functional groups selected from a hydroxyl group, an amino group, an amido group and a carboxyl group is disposed at one or both terminals of a perfluoroalkyl polyether chain.