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US 6,660,886 B1Granted
Amphiphilic lubricants for magnetic media
AssigneeSeagate Technology LLC
InventorsYoumin Liu, Vidya Gubbi, Chung Shih
Life of this patent
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Abstract
A magnetic recording medium including a lubricant topcoat having increased bonding to the medium surface comprises an amphiphilic lubricant molecule having a hydrophilic central portion including a plurality of polar functional groups bound to the medium surface and a pair hydrophobic fluoroalkyl ether or perfluoroalkylether end portions at respective ends of the hydrophilic central portion and extending away from the medium surface.
Claims4
A method of producing a symmetrically configured, amphiphilic lubricant compound having formula (I)
- which method comprises combining two molecules of a compound of formula (II):
- with one molecule of a compound of formula (III)
- H—Z—(R4)m—Z′—H
- wherein:
- A is alkyl, haloalkyl, alkoxy, haloalkoxy, aryl, or haloaryl;
- R1 and R2 are independently C1-10 fluoroalkyl, or C1-10 perfluoroalkyl;
- Z and Z′ are independently NH, oxygen, or sulfur;
- x and y are between about 1 to about 10;
- m is 1 to 4;
- and
- R4 is alkylene, alkylene-oxy, alkylene-thio, alkylene-dithio, alkylene-sulfonyl, or halosubstitued derivatives thereof.
8 more elements
A symmetrically configured, amphiphilic lubricant having the formula:
- wherein:
- A is alkyl, haloalkyl, alkoxy, haloalkoxy, aryl, or haloaryl;
- R1 and R2 are independently C1-10 fluoroalkyl, or C1-10 perfluoroalkyl;
- Z and Z′ are independently NH, oxygen, or sulfur;
- x and y are between about 1 to about 10;
- m is 1 to 4;
- and
- R4 is alkylene, alkylene-oxy, alkylene-thio, alkylene-dithio, alkylene-sulfonyl, or halosubstitued derivatives thereof.
5 more elements
Dependencies are inferred from the claim text.