Fluorine-containing ether compound, lubricant for magnetic recording medium, and magnetic recording medium
A compound and fluorine-containing ether technology, applied in magnetic recording layer, lubricating composition, organic chemistry, etc., to achieve excellent reliability and durability
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Embodiment 1
[0301] The compound represented by the said formula (A) is obtained by the method shown below.
[0302] Add HOCH to a 100 mL eggplant-shaped 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 allyl glycidol represented by the above formula (6a) 2.28 g of ether and 20 mL of tert-butanol were stirred at room temperature until homogeneous to form 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.
[0303] The reaction product obtained after the reaction was cooled to 25°C, transferred to a separatory funnel to which 100 mL of water was added, and extracted three times with 100 mL of ethyl acetate. The organic layer ...
Embodiment 2
[0312] The compound represented by the said formula (B) is obtained by the method shown below.
[0313] By reacting the compound represented by the above formula (16) with epibromohydrin, a compound represented by the following formula (17) as an intermediate is obtained.
[0314]
[0315] In formula (17), m representing the average degree of polymerization represents 4.5, and n representing the average degree of polymerization represents 4.5.
[0316] Add HOCH to a 100 mL eggplant-shaped 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), 5.45 g of the compound represented by the following formula (6ba), and 20 mL of tert-butanol, stirred at room temperature until homogeneous to form a mixture. ...
Embodiment 3
[0329] The compound represented by the said formula (C) is obtained by the method shown below.
[0330] Except having used the compound represented by the following formula (6ca) instead of the compound represented by the formula (6ba), the same operation as in Example 2 was carried out to obtain the compound (C) (in the formula (C), mc1 representing the average degree of polymerization , mc2, nc1, nc2 is 4.5.) 8.5g.
[0331]
[0332] In formula (6ca), THP represents a tetrahydropyranyl group.
[0333] In addition, the compound represented by the formula (6ca) is synthesized by protecting the secondary hydroxyl group of glycerol diglycidyl ether with dihydropyran, and then performing a monoaddition reaction of allyl alcohol.
[0334] The obtained compound (C) was subjected to 1 H-NMR and 19 The structure was confirmed from the following results by F-NMR measurement.
[0335] 1 H-NMR (acetone-D 6 ): δ[ppm]=3.40~3.55(4H), 3.65~3.75(2H), 3.75~3.85(4H), 4.00~4.15(27H), 5....
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