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 2 —CH 2 —R 1 —CH 2 OCH 2 CH(OH)—(CH 2 ) n —CH(OH)CH 2 OCH 2 —R 1 —CH 2 —R 2 (1) (in the formula (1), n is an integer of 2 to 6, R 1 is a perfluoropolyether chain, R 2 is —OCH 2 CH(OH)CH 2 O(CH 2 ) m OH (m in the formula is an integer of 2 to 4)).
1. A fluorine-containing ether compound represented by any one of the following formulae (A) to (C),
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.
2. The fluorine-containing ether compound according to claim 1 ,
wherein a number-average molecular weight thereof is in a range of 500 to 10000.
3. A lubricant for a magnetic recording medium, comprising:
the fluorine-containing ether compound according to claim 1 .
4. 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 .
5. The magnetic recording medium according to claim 4 ,
wherein the lubricating layer has an average film thickness of 0.5 nm to 3 nm.
6. The fluorine-containing ether compound according to claim 1 , wherein in formula (A), p represents 1 to 20 and q represents 0 to 20,
in formula (B), r represents 1 to 20, and
in formula (C), s represents 1 to 15.
7. The fluorine-containing ether compound according to claim 1 , wherein in formula (A), p represents 1 to 20 and q represents 0 to 20,
in formula (B), r represents 2 to 20, and
in formula (C), s represents 2 to 15.
8. The fluorine-containing ether compound according to claim 1 , wherein in formula (A), p represents 1 to 15 and q represents 0 to 15,
in formula (B), r represents 2 to 20, and
in formula (C), s represents 2 to 15.
9. The fluorine-containing ether compound according to claim 1 , wherein in formula (A), p represents 1 to 15 and q represents 0 to 15,
in formula (B), r represents 3 to 10, and
in formula (C), s represents 2 to 8.
10. The fluorine-containing ether compound according to claim 1 , wherein in formula (A), p represents 1 to 13 and q represents 0 to 13,
in formula (B), r represents 3 to 10, and
in formula (C), s represents 2 to 8.
11. The fluorine-containing ether compound according to claim 10 , wherein a number-average molecular weight thereof is in a range of 1000 to 10000.
12. The fluorine-containing ether compound according to claim 10 , wherein a number-average molecular weight thereof is in a range of 500 to 3000.
13. The fluorine-containing ether compound according to claim 10 , wherein a number-average molecular weight thereof is in a range of 1000 to 3000.
14. The fluorine-containing ether compound according to claim 1 , wherein a number-average molecular weight thereof is in a range of 1000 to 10000.
15. The fluorine-containing ether compound according to claim 1 , wherein a number-average molecular weight thereof is in a range of 500 to 3000.
16. The fluorine-containing ether compound according to claim 1 , wherein a number-average molecular weight thereof is in a range of 1000 to 3000.