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.

公开(公告)号：US20180047419A1

公开(公告)日：2018-02-15

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: G11B5/725 ,  C10M105/54 ,  C08G65/26 ,  C07C43/13

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：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：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：US20230257521A1

公开(公告)日：2023-08-17

申请号：US17630594

申请日：2020-07-10

Applicant: SHOWA DENKO K.K.

Inventor： Naoya FUKUMOTO ,  Daisuke YAGYU ,  Tsuyoshi KATO ,  Katsumi MUROFUSHI

IPC: C08G65/337 ,  G11B5/725 ,  C10M107/38 ,  C10N40/18

CPC classification number: C08G65/337 ,  C10M107/38 ,  G11B5/7257 ,  C10M2213/0606 ,  C10N2040/18

Abstract: A fluorine-containing ether compound represented by the following formula (1) is provided.





(In the formula (1), R1 is an alkoxy group having 1 to 10 carbon atoms, 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：US20210188766A1

公开(公告)日：2021-06-24

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 ,  C07C43/205 ,  C07C255/17 ,  C07C255/19 ,  C07C255/50 ,  C07D333/16 ,  C08G65/08 ,  C10M107/38 ,  G11B5/725

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.

公开(公告)号：US20190180782A1

公开(公告)日：2019-06-13

申请号：US16169065

申请日：2018-10-24

Applicant: SHOWA DENKO K.K.

Inventor： Katsumi MUROFUSHI ,  Yoshitaka ISHIBASHI ,  Takayuki FUKUSHIMA ,  Kazuya NIWA ,  Lei ZHANG ,  Yuji MURAKAMI ,  Hisato SHIBATA ,  Takehiro YAMAGUCHI ,  Chen XU ,  Tetsuya KANBE ,  Tomoo SHIGE

IPC: G11B5/851 ,  G11B5/65 ,  G11B5/72 ,  G11B5/82

Abstract: A magnetic recording medium includes a substrate, an underlayer provided on the substrate, and a magnetic layer provided on the underlayer and having a L10 structure and a (001) orientation. The magnetic layer has a granular structure in which an organic compound having a methylene skeleton or a methine skeleton is arranged at grain boundaries of magnetic grains.

公开(公告)号：US20190084911A1

公开(公告)日：2019-03-21

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 ,  C07C43/178 ,  C07D333/16 ,  C07D303/26 ,  C07D409/12 ,  C07D277/24 ,  C10M105/54 ,  G11B5/733

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.)