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).

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)).

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.)

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.).

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.

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)).

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.

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.)

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.)

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.