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公开(公告)号:US20230120626A1
公开(公告)日:2023-04-20
申请号:US17788125
申请日:2020-12-16
Applicant: SHOWA DENKO K.K.
Inventor: Naoya FUKUMOTO , Tsuyoshi KATO , Katsumi MUROFUSHI , Daisuke YAGYU , Masaki NANKO , Natsumi SHIBATA
IPC: C10M105/72 , C10M105/56 , C07C43/13 , G11B5/725
Abstract: There is provided a fluorine-containing ether compound represented by the following formula. R1—R2—CH2—R3—CH2—OCH2CH(OH)CH2O—CH2—R3—CH2—R4—R5 (in the formula, R3 represents a perfluoropolyether chain; R2 and R4 represent a divalent linking group having a polar group and may be the same or different from each other; R1 and R5 represent a terminal group bonded to an oxygen atom of R2 or R4 and may be the same or different from each other; and at least one of R1 and R5 is an organic group having 1 to 8 carbon atoms and at least one of hydrogens included in the organic group is substituted by a cyano group).
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公开(公告)号:US20220380695A1
公开(公告)日:2022-12-01
申请号:US17765175
申请日:2020-09-08
Applicant: SHOWA DENKO K.K.
Inventor: Naoya FUKUMOTO , Daisuke YAGYU , Katsumi MUROFUSHI , Katsumi MUROFUSHI
IPC: C10M107/38 , C10M171/04 , G11B5/725
Abstract: A fluorine-containing ether compound represented by the following formula (1). C6H6-n—[O—R1—O—CH2—R2—CH2—R3]n (1) (in the formula (1), n is an integer of 2 or 3, R1 is any one of —CH2CH2—, —CH2CH2CH2— and —CH2CH(OH)CH2—, R2 is a perfluoropolyether chain, R3 is —OCH2CH(OH)CH2O(CH2)mOH (m in the formula is an integer of 2 to 4)).
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公开(公告)号:US20210340457A1
公开(公告)日:2021-11-04
申请号:US16470713
申请日:2017-11-24
Applicant: SHOWA DENKO K.K.
Inventor: Naoya FUKUMOTO , Yuta YAMAGUCHI , Naoko ITO , Katsumi MUROFUSHI
IPC: C10M107/38 , C08G65/331 , G11B5/725
Abstract: A fluorine-containing ether compound represented by formula (1) shown below. R4—CH2—R3—CH2—R2—CH2—R1—CH2—R2—CH2—R3—CH2—R4 (1) (In formula (1), R1 and R3 represent different perfluoropolyether chains, R2 represents a linking group containing one or more polar groups, and R4 represents a terminal group containing two or more polar groups.)
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公开(公告)号:US20210062101A1
公开(公告)日:2021-03-04
申请号:US16643989
申请日:2018-08-07
Applicant: SHOWA DENKO K.K.
Inventor: Tsuyoshi KATO , Daisuke YAGYU , Naoya FUKUMOTO , Yuta YAMAGUCHI
IPC: C10M105/54 , G11B5/82 , G11B5/725 , C10M107/38
Abstract: A fluorine-containing ether compound represented by Formula (1) is provided, R1-R2—CH2—R3—CH2—R4 (1) (In Formula (1), R1 is an alkyl group that may have a substituent, R2 is a divalent linking group bonded to R1 via an ethereal oxygen, R3 is a perfluoropolyether chain, and R4 is an end group which is different from R1-R2 and includes two or three polar groups, in which each of the polar groups is bonded to a different carbon atom, and the carbon atoms bonded to the polar groups are bonded to each other via a linking group containing a carbon atom not bonded to the polar groups.).
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5.
公开(公告)号:US20200005824A1
公开(公告)日:2020-01-02
申请号:US16489919
申请日:2018-02-20
Applicant: SHOWA DENKO K.K.
Inventor: Hiroyuki TOMITA , Hiroko HATTORI , Naoya FUKUMOTO , Ryuuta MIYASAKA , Naoko ITO , Ichiro OTA , Katsumi MUROFUSHI
IPC: G11B5/84 , G11B5/725 , C08G65/333 , C08G65/332 , C10M107/38
Abstract: 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.
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公开(公告)号:US20220259513A1
公开(公告)日:2022-08-18
申请号:US17630639
申请日:2020-07-09
Applicant: SHOWA DENKO K.K.
Inventor: Naoya FUKUMOTO , Daisuke YAGYU , Tsuyoshi KATO , Katsumi MUROFUSHI
IPC: C10M107/38 , C08G65/331 , C07C43/13 , G11B5/725
Abstract: A fluorine-containing ether compound represented by the following formula (1) is provided. R2—CH2—R1—CH2OCH2CH(OH)—(CH2)n—CH(OH)CH2OCH2—R1—CH2—R2 (1) (in the formula (1), n is an integer of 2 to 6, R1 is a perfluoropolyether chain, R2 is —OCH2CH(OH)CH2O(CH2)mOH (m in the formula is an integer of 2 to 4)).
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7.
公开(公告)号:US20200283392A1
公开(公告)日:2020-09-10
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 , C10M107/24 , C10M107/38 , C10M107/40 , C10M107/46 , G11B5/725 , C07D277/24 , C07D333/16
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.
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8.
公开(公告)号:US20190382676A1
公开(公告)日:2019-12-19
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 , C08G65/334 , C08G65/333 , C10M107/44 , C07D333/16 , C07D231/12 , C07D277/24 , C07D409/12 , C07D213/68 , G11B5/725
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.)
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9.
公开(公告)号:US20240002743A1
公开(公告)日:2024-01-04
申请号:US18009371
申请日:2021-06-07
Applicant: SHOWA DENKO K.K.
Inventor: Tsuyoshi KATO , Ayano ASANO , Natsumi SHIBATA , Daisuke YAGYU , Takuma KURODA , Naoya FUKUMOTO
IPC: C10M131/10 , C07C43/12 , G11B5/725
CPC classification number: C10M131/10 , C07C43/126 , C10N2040/18 , C10M2211/0425 , G11B5/7257
Abstract: What is provided is a fluorine-containing ether compound represented by the following formula. R1—R2—O—CH2—R3—CH2—O—R4—R5
(R3 is a perfluoropolyether chain; R2 is represented by Formula (2), R4 is represented by Formula (3), R1 and R5 are hydrogen atoms or Formula (4); a and b in Formula (2) are an integer of 0 to 2, c in Formula (2) is an integer of 2 to 5, d and e in Formula (3) are an integer of 0 to 2, f in Formula (3) is an integer of 2 to 5; at least one of b in Formula (2) and e in Formula (3) is 1 or more; and k in Formula (4) is an integer of 3 to 6.)-
10.
公开(公告)号:US20200263104A1
公开(公告)日:2020-08-20
申请号:US15999837
申请日:2017-02-20
Applicant: SHOWA DENKO K.K.
Inventor: Yuta YAMAGUCHI , Naoya FUKUMOTO , Naoko ITO , Hiroyuki TOMITA , Ichiro OTA , Katsumi MUROFUSHI
IPC: C10M105/54 , C07C43/13 , G11B5/725
Abstract: 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.
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