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.

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：US11661478B2

公开(公告)日：2023-05-30

申请号：US16489931

申请日：2018-02-06

申请人： SHOWA DENKO K.K.

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

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

CPC分类号： C08G65/331 ,  C08G65/333 ,  C10M107/38 ,  G11B5/7257 ,  C10N2040/18

摘要： 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

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.)