公开(公告)号：US11661478B2

公开(公告)日：2023-05-30

申请号：US16489931

申请日：2018-02-06

Applicant: SHOWA DENKO K.K.

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

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

CPC classification number: C08G65/331 ,  C08G65/333 ,  C10M107/38 ,  G11B5/7257 ,  C10N2040/18

Abstract: 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：US11514945B2

公开(公告)日：2022-11-29

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 ,  G11B5/72 ,  C08G65/332 ,  C08G65/333 ,  C10M107/38 ,  G11B5/725

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.