08-09-2022 дата публикации
Номер: US20220282176A1
Принадлежит:
High temperature lubricants for magnetic media are provided. One such lubricant includes fluoroalkyl, fluoroalkenyl, perfluoroalkyl, or perfluoroalkyl ether segments, anchoring functional groups engageable with a protective overcoat of a magnetic recording media, and cyclic functional groups. The lubricants can be used in conjunction with a magnetic recording medium and/or a magnetic data storage system. 1. A lubricant comprising: a plurality of segments according to general formula (I) , (II) , or (III):{'br': None, 'sup': 1', '1', '2', '2, 'Re—Rb-Rc-Rb—Re\u2003\u2003(I);'}{'br': None, 'sup': 1', '1', '2, 'Re—Rb—Re\u2003\u2003(II); or'}{'br': None, 'sup': 1', '1', '2', '2, 'sub': 'm', 'Re—Rb—(Rc-Rb)—Re\u2003\u2003(III);'}wherein Rc, when present, is a divalent linking segment comprising an anchoring functional group engageable with a protective overcoat of a magnetic recording media;{'sup': 1', '2, 'wherein each Rband Rb, when present, independently comprises a chain segment comprising at least one of a fluoroalkyl ether moiety, a fluoroalkenyl ether moiety, a perfluoroalkyl ether moiety, a perfluoroalkenyl ether moiety, or a combination thereof;'}{'sup': 1', '2, 'wherein each of Reand Reindependently comprises an anchoring functional group engageable with a protective overcoat of a magnetic recording media, and'}{'sup': 1', '2, 'sub': 3', '50', '3', '50', '3', '50', '5', '50', '10', '50', '5', '50, 'wherein one or more of Re, Re, and Rc, independently comprises a cyclic functional group comprising at least one of an alicyclic C-Calkyl radical, an alicyclic C-Calkenyl radical, a heterocyclic C-Cradical, an aromatic C-Cradical, a polycyclic aromatic C-Cradical, a heteroaromatic C-Cradical, a cyclotriphosphazine radical, or a combination thereof.'}2. The lubricant of claim 1 , wherein at least one anchoring functional group claim 1 , at least one cyclic functional group claim 1 , or a combination thereof claim 1 , further comprises at least one of B claim 1 , Si ...
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