Back to results
US 12,753,360 B2Granted
High thermal stability lubricants
AssigneeWestern Digital Technologies, Inc.
InventorsBala Krishna Pathem, Robert James Waltman
Life of this patent
Estimating the term…
Abstract
A multidentate lubricant comprising an anchoring moiety Ra attached to a plurality of sidechain moieties —(Rb—Re) according to the general formula: Ra—(Rb—Re)x; wherein Ra is a multivalent radical of valance x; and each sidechain includes a perfluoroethyl ether moiety. The lubricant can be used in conjunction with a magnetic recording medium and/or a magnetic data storage system.
Claims20
A lubricant comprising:
- a multidentate lubricant comprising an anchoring moiety Ra attached to a plurality of sidechain moieties —(Rb-Re) according to a general formula:
- Ra-(Rb-Re)x;
- wherein Ra is a multivalent radical of valence x;
- wherein each Rb is, independently, a divalent moiety comprising the general formula:
- —OCH2CF2O—(CF2CF2O)b—C(R#)2CH2—;
- wherein each R# is a hydrogen atom;
- wherein each b is, independently, from 1 to 10;
- wherein x is greater than or equal to 2;
- and
- wherein each Re is a hydroxyl (—OH).
7 more elements
A lubricant comprising:
- a multidentate lubricant comprising an anchoring moiety Ra attached to a plurality of sidechain moieties —(Rb-Re) according to a general formula:
- Ra-(Rb-Re)x;
- wherein Ra is a multivalent radical of valence x represented by the formula:
- wherein each of R1, R2, R3, R4, R5, and R6, is, independently, a hydrogen or a functional group comprising a sidechain comprising a formula —(Rb-Re) with the proviso that two or more of R1, R2, R3, R4, R5, and R6, are, independently, the sidechain having the formula —(Rb-Re);
- wherein each Rb is, independently, a divalent moiety comprising a general formula:
- —OCH2CF2O—(CF2CF2O)b—C(R#)2CH2—;
- wherein each R# is, independently, a hydrogen or a fluorine atom;
- wherein each b is, independently, from 1 to 10;
- wherein x is greater than or equal to 2;
- and
- wherein each Re is, independently, a hydroxyl (—OH) or a functional group including elements from periodic table Groups 13-17.
8 more elements
Dependencies are inferred from the claim text.