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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 12100434 B1

PDFFull Text
Date of Patent:
Sep. 24, 2024

Filed:

Feb. 02, 2021

Fluorine-containing ether compound, lubricant for magnetic recording medium, and magnetic recording medium

Applicant:

Resonac Corporation, Tokyo, JP;

Inventors:

Daisuke Yagyu, Ichihara, JP;

Tsuyoshi Kato, Ichihara, JP;

Ayano Asano, Ichihara, JP;

Natsumi Shibata, Ichihara, JP;

Naoya Fukumoto, Ichihara, JP;

Assignee:

Resonac Corporation, Tokyo, JP;

Attorney:

Sughrue Mion, PLLC

Primary Examiner:

Holly Rickman

Int. Cl.
CPC ...
G11B 5/725 (2006.01); C07D 303/28 (2006.01); C07D 309/12 (2006.01); C07D 405/12 (2006.01); C07D 407/12 (2006.01); C07D 409/12 (2006.01); C10M 105/54 (2006.01); C10M 105/70 (2006.01); C10M 105/72 (2006.01); C10N 20/04 (2006.01); C10N 40/18 (2006.01);
U.S. Cl.
CPC ...
G11B 5/7257 (2020.08); C07D 303/28 (2013.01); C07D 309/12 (2013.01); C07D 405/12 (2013.01); C07D 407/12 (2013.01); C07D 409/12 (2013.01); C10M 105/54 (2013.01); C10M 105/70 (2013.01); C10M 105/72 (2013.01); C10M 2211/0425 (2013.01); C10M 2215/305 (2013.01); C10M 2219/102 (2013.01); C10N 2020/04 (2013.01); C10N 2040/18 (2013.01);
Abstract

A fluorine-containing ether compound represented by a formula (1) shown below.R—(O(CH))-[A]-[B]—O—CH—R—CH—R  (1)(In the formula (1), Ris an alkyl group which may have a substituent, or an organic group having at least one double bond or triple bond. Further, a represents an integer of 2 to 4, and b is 0 or 1. [A] is represented by a formula (2): —(OCHCH(OH)CH)— (wherein c is 1 or 2). [B] is represented by a formula (3): —(O(CH)CH(OH)CH)— (wherein d is 0 or 1, and e represents an integer of 2 to 4). However, the sum of c in the formula (2) and d in the formula (3) is 2. Ris a perfluoropolyether chain. Ris represented by a formula (4): —(OCHCH(OH)CH)—O—CH(CH)OH (wherein f represents an integer of 2 to 5).

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