Fluorine-containing ether compound, lubricant for magnetic recording medium, and magnetic recording medium
This fluorine-containing ether compound is represented by Formula (1). R 1 —R 2 —CH 2 —R 3 —CH 2 —R 4 —R 5 (1) (in Formula (1), R 1 is an aryl group or an aralkyl group, R 2 is a divalent linking group having 0 or 1 polar group, R 3 is a perfluoropolyether chain, R 4 is a divalent linking group having 2 or 3 polar groups, and R 5 is an aryl group or an aralkyl group.)
1. A fluorine-containing ether compound represented by Formula (1),
R 1 —R 2 —CH 2 —R 3 —CH 2 —R 4 —R 5 (1)
in Formula (1), R 1 is any one selected from a benzene ring group which may have a substituent, a naphthalene ring group which may have a substituent, a benzyl group which may have a substituent, or a naphthylmethyl group which may have a substituent,
R 2 is represented by —O— or Formula (4)
R 3 is a perfluoropolyether chain represented by any one of Formulas (3-1), (3-2), and (3-3),
in Formula (3-1), m represents an integer of 1 to 30, and n represents an integer of 0 to 30,
in Formula (3-2), u represents an integer of 1 to 30,
in Formula (3-3), v represents an integer of 1 to 30,
R 4 is represented by Formula (2)
in Formula (2), t represents an integer of 2 or 3, r represents an integer of 1 to 4, and k represents an integer of 0 to 3, and
R 5 is any one selected from a benzene ring group which may have a substituent, a naphthalene ring group which may have a substituent, a benzyl group which may have a substituent, or a naphthylmethyl group which may have a substituent.
2. The fluorine-containing ether compound according to claim 1 ,
wherein the compound in Formula (1) is represented by Formula (5),
in Formula (5), X represents any one of a hydrogen atom, a halogen atom, an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, and a fluoroalkyl group having 1 to 5 carbon atoms, and may be one or plural and, when plural, X may be the same or different from each other, R 5 represents any one selected from a benzene ring group which may have a substituent, a naphthalene ring group which may have a substituent, a benzyl group which may have a substituent, or a naphthylmethyl group which may have a substituent, p represents an integer of 1 to 30, q represents an integer of 0 to 30, and s represents an integer of 0 to 3.
3. The fluorine-containing ether compound according to claim 1 ,
wherein the compound in Formula (1) is represented by Formula (6),
in Formula (6), Y represents any one of a hydrogen atom, a halogen atom, an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, and a fluoroalkyl group having 1 to 5 carbon atoms, and may be one or a plurality and, when a plurality, Y may be the same or different from each other, R 5 represents any one selected from a benzene ring group which may have a substituent, a naphthalene ring group which may have a substituent, a benzyl group which may have a substituent, or a naphthylmethyl group which may have a substituent, p represents an integer of 1 to 30, q represents an integer of 0 to 30, and s represents an integer of 0 to 3.
4. The fluorine-containing ether compound according to claim 1 ,
wherein the compound in Formula (1) is represented by Formula (7),
in Formula (7), Y represents any one of a hydrogen atom, a halogen atom, an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, and a fluoroalkyl group having 1 to 5 carbon atoms, and may be one or a plurality and, when a plurality, Y may be the same or different from each other, R 5 represents an aryl group or an aralkyl group, p represents an integer of 1 to 30, q represents an integer of 0 to 30, and s represents an integer of 0 to 3.
5. The fluorine-containing ether compound according to claim 1 ,
wherein a number-average molecular weight is in a range of 500 to 10,000.
6. A lubricant for a magnetic recording medium, comprising:
the fluorine-containing ether compound according to claim 1 .
7. A magnetic recording medium, comprising:
at least a magnetic layer;
a protective layer; and
a lubricating layer sequentially provided on a substrate,
wherein the lubricating layer includes the fluorine-containing ether compound according claim 1 .
8. The magnetic recording medium according to claim 7 ,
wherein an average film thickness of the lubricating layer is 0.5 nm to 2 nm.
9. The fluorine-containing ether compound according to claim 1 , wherein in Formula (2), t represents an integer of 3.
10. The fluorine-containing ether compound according to claim 1 , wherein the compound in Formula (1) is represented by Formula (8),
In Formula (8), x represents an integer of 1 to 15, z represents an integer of 0 to 15, and Me represents a methyl group.
11. The fluorine-containing ether compound according to claim 1 , wherein the compound in Formula (1) is represented by Formula (9),
In Formula (9), x represents an integer of 1 to 15, and z represents an integer of 0 to 15.
12. The fluorine-containing ether compound according to claim 1 , wherein the compound in Formula (1) is represented by Formula (11),
In Formula (11), x represents an integer of 1 to 15, and z represents an integer of 0 to 15.