US 11,866,550 B2
Fluoropolyether compound, lubricant, and magnetic disk
Tomoko Honda, Kobe (JP); and Ryosuke Sagata, Kobe (JP)
Assigned to Moresco Corporation, Kobe (JP)
Filed by Moresco Corporation, Kobe (JP)
Filed on Jul. 13, 2022, as Appl. No. 17/863,602.
Claims priority of application No. 2021-118153 (JP), filed on Jul. 16, 2021.
Prior Publication US 2023/0038701 A1, Feb. 9, 2023
Int. Cl. C08G 65/00 (2006.01); C10M 107/38 (2006.01); G11B 5/725 (2006.01); C10M 177/00 (2006.01)
CPC C08G 65/007 (2013.01) [C10M 107/38 (2013.01); C10M 177/00 (2013.01); G11B 5/7257 (2020.08); C10M 2213/0606 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A fluoropolyether compound represented by a Formula below:

OG Complex Work Unit Chemistry
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.