US 12,518,787 B2Granted

Fluorine-containing ether compound, lubricant for magnetic recording medium, and magnetic recording medium

AssigneeResonac Corporation

InventorsNatsumi Shibata, Naoya Fukumoto, Ayano Asano, Tsuyoshi Kato, Takuma Kuroda, Daisuke Yagyu, Chizuru Kasahara, Yutaka Tanji

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Abstract

The present invention provides a fluorine-containing ether compound represented by the following formula. R1—CH2—R2—CH2—R3—CH2—R4—CH2—R5—CH2—R6—CH2—R7 (In Formula (1), R2, R4, and R6 are perfluoropolyether chains, R3 is Formula (2), R5 is Formula (3), and R1 and R7 are each independently a terminal group having two or three polar groups, in which individual polar groups are bound to different carbon atoms and the carbon atoms to which the polar groups are bound are bound to each other via a linking group containing a carbon atom to which no polar group is bound).

Claims13

Dependent claims

A fluorine-containing ether compound represented by Formula (1) below,

R1—CH2—R2—CH2—R3—CH2—R4—CH2—R5—CH2—R6—CH2—R7 (1)
(in Formula (1),
R1 and R7 are each independently a terminal group having two or three polar groups, in which individual polar groups are bound to different carbon atoms, wherein
the different carbon atoms, to which the individual polar groups are bound, are bound to each other via a linking group containing a carbon atom to which no polar group is bound,
R2, R4, and R6 are the same or different perfluoropolyether chains,
R3 is a linking group represented by Formula (2) below,
R5 is a linking group represented by Formula (3) below),
(in Formula (2), a is an integer of 1 to 3 and b is an integer of 1 to 2, and in Formula (3), c is an integer of 1 to 3 and d is an integer of 1 to 2, provided that a in Formula (2) and c in Formula (3) are not 1 at the same time).

5 more elements

Dependencies are inferred from the claim text.