US 2025/0354079 A1Published application

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

AssigneeResonac Corporation

InventorsNatsumi YOSHIMURA, Ayano ASANO, Yutaka TANJI, Daisuke YAGYU, Takuya UNO, Tsuyoshi KATO, Naoya FUKUMOTO

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Abstract

A fluorine-containing ether compound represented by R1—[B]-[A]-CH2—R2[—CH2—R3—CH2—R2], CH2—[C]-[D]-R4 ([A] is Formula (2-1), [B] is Formula (2-2), [C] is Formula (3-1), [D] is Formula (3-2), R4 is Formula (4), R1 is a terminal group that may be the same as or different from R4, z is 1 or 2, and R2 is a perfluoropolyether chain. R3 is Formula (5)).

Claims18

Dependent claims

A fluorine-containing ether compound represented by the following Formula (1):

(in Formula (1), [A] is represented by the following Formula (2-1), in Formula (2-1), a is an integer of 0 to 3, [B] is represented by the following Formula (2-2), in Formula (2-2), b is an integer of 0 to 3 and c is an integer of 2 to 5, wherein a sum of the values of a and b is 1 to 3, in Formula (1), [A] and [B] may be interchanged, [C] is represented by the following Formula (3-1), in Formula (3-1), d is an integer of 0 to 2, [D] is represented by the following Formula (3-2), in Formula (3-2), e is an integer of 0 to 2, and f is an integer of 2 to 5, wherein a sum of the values of d and e is 1 or 2, in Formula (1), [C] and [D] may be interchanged, R4 is a branched terminal group having 3 to 30 carbon atoms and represented by the following Formula (4), in Formula (4), L represents an integer of 0 to 6, in Formula (4), Y1 and Y2 are each independently a hydrocarbon group which has only one primary hydroxy group and may contain an ether oxygen atom, in Formula (4), Y3 is a hydrocarbon group which has only one primary hydroxy group and may contain an ether oxygen atom, or a hydrogen atom, R1 is a terminal group that may be the same as or different from R4, and a branched terminal group having 3 to 30 carbon atoms represented by Formula (4), an organic group having 1 to 30 carbon atoms, which has an ether oxygen atom at the terminal bonded to [A] or [B], or a hydroxy group, z represents 1 or 2, R2 is a perfluoropolyether chain, some or all of two or three R2's may be the same as or different from each other, R3 is a divalent linking group represented by the following Formula (5), in Formula (5), y1 is an integer of 1 to 3, and y2 is an integer of 1 to 3, in Formula (5), a dotted line bonded to the oxygen atom on the left side indicates a bond with a methylene group on the side of R1, and a dotted line bonded to the oxygen atom on the right side indicates a bond with a methylene group on the side of R4, and when z is 2, two R3's may be the same as or different from each other).

Dependencies are inferred from the claim text.

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Abstract

A fluorine-containing ether compound represented by the following Formula (1):

(in Formula (1), [A] is represented by the following Formula (2-1), in Formula (2-1), a is an integer of 0 to 3, [B] is represented by the following Formula (2-2), in Formula (2-2), b is an integer of 0 to 3 and c is an integer of 2 to 5, wherein a sum of the values of a and b is 1 to 3, in Formula (1), [A] and [B] may be interchanged, [C] is represented by the following Formula (3-1), in Formula (3-1), d is an integer of 0 to 2, [D] is represented by the following Formula (3-2), in Formula (3-2), e is an integer of 0 to 2, and f is an integer of 2 to 5, wherein a sum of the values of d and e is 1 or 2, in Formula (1), [C] and [D] may be interchanged, R4 is a branched terminal group having 3 to 30 carbon atoms and represented by the following Formula (4), in Formula (4), L represents an integer of 0 to 6, in Formula (4), Y1 and Y2 are each independently a hydrocarbon group which has only one primary hydroxy group and may contain an ether oxygen atom, in Formula (4), Y3 is a hydrocarbon group which has only one primary hydroxy group and may contain an ether oxygen atom, or a hydrogen atom, R1 is a terminal group that may be the same as or different from R4, and a branched terminal group having 3 to 30 carbon atoms represented by Formula (4), an organic group having 1 to 30 carbon atoms, which has an ether oxygen atom at the terminal bonded to [A] or [B], or a hydroxy group, z represents 1 or 2, R2 is a perfluoropolyether chain, some or all of two or three R2's may be the same as or different from each other, R3 is a divalent linking group represented by the following Formula (5), in Formula (5), y1 is an integer of 1 to 3, and y2 is an integer of 1 to 3, in Formula (5), a dotted line bonded to the oxygen atom on the left side indicates a bond with a methylene group on the side of R1, and a dotted line bonded to the oxygen atom on the right side indicates a bond with a methylene group on the side of R4, and when z is 2, two R3's may be the same as or different from each other).