Fluoropolyether compound, lubricant, and magnetic disk
AssigneeMoresco Corporation
InventorsTomoko Honda, Ryosuke Sagata
Life of this patent
Estimating the term…
Abstract
Provided are a fluoropolyether compound having high heat resistance and capable of maintaining a surface protection layer even under high temperature, and a lubricant and a magnetic disk that contain the fluoropolyether compound. The fluoropolyether compound includes: three groups whose main chain contains a perfluoropolyether chain; and a trivalent linking group represented by Formula (1) below, the three groups being bound together via the trivalent linking group: where R1 is a saturated hydrocarbon group having 1 to 3 carbon atoms, a perfluoroalkyl group having 1 to 3 carbon atoms, an alkoxy group having 1 to 3 carbon atoms, a hydroxyl group, or an amino group, and A1, A2, and A3 are each independently an aromatic group.
Claims4
A fluoropolyether compound represented by a Formula below:
- where R1 is a saturated hydrocarbon group having 1 to 3 carbon atoms, a perfluoroalkyl group having 1 to 3 carbon atoms, an alkoxy group having 1 to 3 carbon atoms, a hydroxyl group, or an amino group, and A1, A2, and A3 are each independently a phenylene group, a naphthylene group, a biphenyl group, or a diphenyl ether group, and
- each —(CF2)a— is independently a linear of branched perfluoroalkylene group, each a is independently a real number of 1 to 3, and
- Rf is represented by Formula (4) below:
- Rf;(OCF2)b(OCF2CF2)c(OCF2CF2CF2)d(OCF2CF2CF2CF2)e(OCF2CF(CF3))r (4)
- where b, c, d, e, and f are independently real numbers of 0 to 21 for each Rf, and at least any one of b, c, d, e, and f is a real number of not less than 1,
- R2, R3, and R4 are each independently F, CH2OH, CH2OCH2CH(OH)CH2OH, CH2OCH2CH(OH)CH2OCH2CH(OH)CH2OH, CH2O(CH2)gOH, CH2OCH2CH(OH)CH2OC6H4OC6H5, CH2OCH2CH(OH)CH2OC10H7, CH2OCH2CH(OH)CH2OC6H4—R5, CH2OCH2CH(OH)CH2O(CH2)hOC6H4—O(CH2)hOH, or CH2OCH2CH(OH)CH2(OCH2CH2)iOC6H4(OCH2CH2)iOH, R5 is hydrogen, and alkoxy group having 1 to 4 carbon atoms, an amino group, a hydroxyl group, or an amide group, g and i are each independently a real number of 1 to 3, and each h is independently a real number of 1 to 6.
Dependencies are inferred from the claim text.