Fluorine-containing ether compound, lubricant for magnetic recording medium, and magnetic recording medium
A fluorine-containing ether compound represented by the following formula (1) is provided. R 1 —CH 2 —R 2 —CH 2 —R 3 (1) (In the formula (1), R 1 is an alkoxy group having 1 to 10 carbon atoms, R 2 is a perfluoropolyether chain, R 3 is —OCH 2 CH(OH)CH 2 O(CH 2 ) m OH (in in the formula is an integer of 2 to 4).)
1. A fluorine-containing ether compound represented by the following formula (1),
R 1 —CH 2 —R 2 —CH 2 —R 3 (1)
(in the formula (1), R 1 is an alkoxy group having 1 to 10 carbon atoms, R 2 is a perfluoropolyether chain, R 3 is —OCH 2 CH(OH)CH 2 O(CH 2 ) m OH (m in the formula is an integer of 2 to 4)).
2. The fluorine-containing ether compound according to claim 1 ,
wherein R 2 in the formula (1) is represented by any one of the following formulae (2) to (4),
(in the formula (2), p represents 1 to 30, and q represents 0 to 30),
(in the formula (3), r represents 1 to 30), and
(in the formula (4), s represents 1 to 20).
3. The fluorine-containing ether compound according to claim 1 that is any one of compounds represented by the following formulae (A) to (F),
(in the formula (A), p represents 1 to 30, and q represents 0 to 30),
(in the formula (B), r represents 1 to 30),
(in the formula (C), s represents 1 to 20),
(in the formula (D), p represents 1 to 30, and q represents 0 to 30),
(in the formula (E), p represents 1 to 30, and q represents 0 to 30), and
(in the formula (F), p represents 1 to 30, and q represents 0 to 30).
4. The fluorine-containing ether compound according to claim 1 ,
wherein a number-average molecular weight thereof is in a range of 500 to 10000.
5. A lubricant for a magnetic recording medium, comprising:
the fluorine-containing ether compound according to claim 1 .
6. A magnetic recording medium, wherein at least a magnetic layer, a protective layer and a lubricating layer are sequentially provided on a substrate, and
the lubricating layer contains the fluorine-containing ether compound according to claim 1 .
7. The magnetic recording medium according to claim 6 ,
wherein the lubricating layer has an average film thickness of 0.5 nm to 3 nm.
8. The fluorine-containing ether compound according to claim 1 ,
wherein R 1 is an alkoxy group having 1 to 7 carbon atoms.
9. The fluorine-containing ether compound according to claim 1 ,
wherein R 1 is an alkoxy group having 3 to 7 carbon atoms.
10. The fluorine-containing ether compound according to claim 2 ,
wherein R 1 is an alkoxy group having 1 to 7 carbon atoms.
11. The fluorine-containing ether compound according to claim 2 ,
wherein R 1 is an alkoxy group having 3 to 7 carbon atoms.