Fluorine-containing ether compound, lubricant for magnetic recording medium, and magnetic recording medium
A compound, fluorine-containing ether technology, applied in the direction of magnetic recording layer, lubricating composition, organic chemistry, etc., can solve the problem that the durability of magnetic recording medium cannot be fully obtained, and achieve excellent adhesion, excellent reliability and durability. , chemical resistance and good wear resistance
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Embodiment 1
[0288] The compound represented by the said formula (A) was obtained by the method shown below.
[0289] Add HOCH to a 100 mL eggplant flask under nitrogen atmosphere 2 CF 2 O(CF 2 CF 2 O) m (CF 2 O) n CF 2 CH 2 20 g of the compound (number average molecular weight 1000, molecular weight distribution 1.1) represented by OH (m representing the average degree of polymerization in the formula is 4.5, and n representing the average degree of polymerization is 4.5), and 2.55 g of the compound represented by the above formula (6a) g, and 20 mL of tert-butanol, and stirred at room temperature until it became homogeneous to prepare a mixture. To this mixture was added 0.90 g of potassium tert-butoxide, and the mixture was stirred at 70° C. for 16 hours to react.
[0290] In addition, the compound represented by formula (6a) is synthesized by reacting 2-cyanoethanol with epibromohydrin.
[0291] The reaction product obtained after the reaction was cooled to 25°C, transferred ...
Embodiment 2
[0300] The compound represented by the above-mentioned formula (B) was obtained by the method shown below.
[0301] The compound represented by the following formula (16) is obtained as an intermediate by reacting the compound represented by the above formula (15) with epibromohydrin.
[0302]
[0303] (In the formula (16), m representing the average degree of polymerization represents 4.5, and n representing the average degree of polymerization represents 4.5.)
[0304] Add HOCH to a 100 mL eggplant flask under nitrogen atmosphere 2 CF 2 O(CF 2 CF 2 O) m (CF 2 O) n CF 2 CH 2 20 g of a compound (number average molecular weight 1000, molecular weight distribution 1.1) represented by OH (m representing the average degree of polymerization in the formula is 4.5, and n representing the average degree of polymerization is 4.5), and a compound represented by the following formula (6ba) 5.70 g and 20 mL of t-butanol were stirred at room temperature until it became homogen...
Embodiment 3
[0317] The compound represented by the said formula (C) was obtained by the method shown below.
[0318] Except having used the compound represented by the formula (6ca) in place of the compound represented by the formula (6ba) in Example 2, the same operation as in Example 2 was carried out to obtain the compound (C) (in the formula (C) ), mc1, mc2, nc1, and nc2 representing the average degree of polymerization are 4.5.) 8.5 g.
[0319]
[0320] (In the formula (6ca), THP represents a tetrahydropyranyl group.)
[0321] In addition, the compound represented by formula (6ca) is synthesized by carrying out a monoaddition reaction of 2-cyanoethanol after protecting the secondary hydroxyl group of glycerol diglycidyl ether with dihydropyran.
[0322] Carry out the obtained compound (C) 1 H-NMR and 19 The structure was identified by the following results by F-NMR measurement.
[0323] 1 H-NMR (acetone-D 6 ): δ[ppm]=3.40-3.60(4H), 3.65-3.85(8H), 3.85-4.10(29H)
[0324] 19...
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