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

1. A fluorine-containing ether compound represented by the following formula (1),

C 6 H 6-n —[O—R 1 —O—CH 2 —R 2 —CH 2 —R 3 ] n   (1)

(in the formula (1), n is an integer of 2 or 3, R 1 is any one of —CH 2 CH 2 —, —CH 2 CH 2 CH 2 — and —CH 2 CH(OH)CH 2 —, 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 2 , wherein the compound is any one of compounds represented by the following formulae (A) to (N),

(in the formula (A), R 2 is represented by the formula (2)),

(in the formula (B), R 2 is represented by the formula (3)),

(in the formula (C), R 2 is represented by the formula (4)),

(in the formula (D), R 2 is represented by the formula (2)),

(in the formula (E), R 2 is represented by the formula (2)),

(in the formula (F), R 2 is represented by the formula (2)),

(in the formula (G), R 2 is represented by the formula (3)), and

(in the formula (H), R 2 is represented by the formula (4)),

(in the formula (I), R 2 is represented by the formula (2)),

(in the formula (J), R 2 is represented by the formula (2)),

(in the formula (K), R 2 is represented by the formula (3)),

(in the formula (L), R 2 is represented by the formula (4)),

(in the formula (M), R 2 is represented by the formula (2)), and

(in the formula (N), R 2 is represented by the formula (2)).

4. The fluorine-containing ether compound according to claim 1 ,

wherein a number-average molecular weight thereof is within a range of 500 to 10000.

5. A lubricant for a magnetic recording medium, comprising:

the flourine-containing ether compound according to claim 1 .

6. 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 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.