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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 10141017 B1

PDFFull Text
Date of Patent:
Nov. 27, 2018

Filed:

Feb. 03, 2016

Lubricant for magnetic recording medium, and magnetic recording medium

Applicant:

Dexerials Corporation, Tokyo, JP;

Inventors:

Nobuo Tano, Tokyo, JP;

Kouki Hatsuda, Tokyo, JP;

Hirofumi Kondo, Tokyo, JP;

Assignee:

Dexerials Corporation, Tokyo, JP;

Attorney:

Carmody Torrance Sandak & Hennessey LLP

Primary Examiner:

James C Goloboy

Int. Cl.
CPC ...
G11B 5/84 (2006.01); G11B 5/725 (2006.01); C10M 105/54 (2006.01); C10M 105/58 (2006.01); C10M 105/60 (2006.01); C10M 105/72 (2006.01); C10M 171/00 (2006.01);
U.S. Cl.
CPC ...
G11B 5/725 (2013.01); C10M 105/54 (2013.01); C10M 105/58 (2013.01); C10M 105/60 (2013.01); C10M 105/72 (2013.01); C10M 171/00 (2013.01); G11B 5/84 (2013.01); C10M 2215/003 (2013.01); C10M 2215/0425 (2013.01); C10M 2219/0406 (2013.01); C10N 2220/021 (2013.01); C10N 2220/04 (2013.01); C10N 2230/06 (2013.01); C10N 2230/08 (2013.01); C10N 2230/10 (2013.01); C10N 2240/204 (2013.01); C10N 2250/121 (2013.01);
Abstract

A lubricant for a magnetic recording medium including an ionic liquid including a Bronsted acid and a Bronsted base that is primary amine as constituents of the ionic liquid, wherein the Bronsted acid includes a fluorine-containing chain, the Bronsted base includes a fluorine-containing chain that is a perfluoroalkyl chain or a perfluoropolyether chain, wherein the fluorine-containing chain in the Bronsted acid is a perfluoropolyether chain or the fluorine-containing chain in the Bronsted base is the perfluoropolyether chain, or the fluorine-containing chain in the Bronsted acid is the perfluoropolyether chain and the fluorine-containing chain in the Bronsted base is the perfluoropolyether chain, and a number average molecular weight of the fluorine-containing chain in the Bronsted acid is 1,500 or less.

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