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Fluorine-containing ether compound, lubricating agent for magnetic recording media, and magnetic recording medium

A magnetic recording medium and compound technology, applied in magnetic recording, magnetic recording layer, data recording, etc., can solve the problems of insufficient durability of magnetic recording media, and achieve excellent reliability and durability

Active Publication Date: 2018-10-23
RESONAC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the durability of the magnetic recording medium cannot be sufficiently obtained only by providing a protective layer on the recording layer.

Method used

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  • Fluorine-containing ether compound, lubricating agent for magnetic recording media, and magnetic recording medium
  • Fluorine-containing ether compound, lubricating agent for magnetic recording media, and magnetic recording medium
  • Fluorine-containing ether compound, lubricating agent for magnetic recording media, and magnetic recording medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0246] The compound represented by the above formula (A) was produced by the method shown below.

[0247] Under a nitrogen atmosphere, add HOCH to a 100 mL eggplant flask 2 CF 2 O(CF 2 CF 2 O) q (CF 2 O) r CF 2 CH 2 25.4 g of a compound represented by OH (q in the formula is 6, and r is 6.) (number average molecular weight: 1270, molecular weight distribution: 1.1), 1.50 g of glycidyl phenyl ether represented by the following formula (7), and t-BuOH 10 mL, stirred at room temperature until homogeneous. 0.900 g of t-BuOK was further added to this homogeneous liquid, and it stirred and reacted at 70 degreeC for 8 hours.

[0248] The obtained reaction product was cooled to 25° C., neutralized with 0.5 mol / L hydrochloric acid, extracted with Bartrel XF (hereinafter referred to as Bartrel XF) manufactured by Mitsui Dupont Flow Chemical Co., Ltd., the organic layer was washed with water, passed through anhydrous sodium sulfate Dehydration was performed. After separating the...

Embodiment 2

[0260] Except having used 1.80 g of the compound represented by following formula (10) instead of the compound represented by formula (7), it carried out similarly to Example 1, and obtained 4.85 g of compounds (B).

[0261] Carry out the compound (B) obtained 1 The structure was identified by H-NMR measurement from the following results.

[0262] compound (B); 1 H-NMR (C 6 f 6 / CD 3 COCD 3 =4 / 1(V / V));

[0263] δ[ppm]3.45~3.60(3H), 3.60~4.00(14H), 3.95~4.15(4H), 6.75~6.85(2H), 7.10~7.20(2H)

[0264]

Embodiment 3

[0266] Except having used 2.00 g of the compound represented by following formula (11) instead of the compound represented by formula (7), it carried out similarly to Example 1, and obtained 4.80 g of compounds (C).

[0267] In addition, a compound represented by the following formula (11) is synthesized from naphthol and epichlorohydrin.

[0268] Carry out the obtained compound (C) 1 The structure was identified by H-NMR measurement from the following results.

[0269] Compound (C); 1 H-NMR (C 6 f 6 / CD 3 COCD 3 =4 / 1(V / V));

[0270] δ[ppm]3.40~3.55(3H), 3.60~3.90(11H), 4.00~4.15(4H), 7.00~7.70(7H)

[0271]

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Abstract

Provided is a fluorine-containing ether compound which is represented by formula (1). R1-R2-CH2-R3-CH2-R4 (1) (In formula (1), R1 represents a terminal group which contains an organic group having atleast one double bond or triple bond; R2 represents a divalent linking group which is bonded to R1 by means of an ether oxygen atom; R3 represents a perfluoropolyether chain; and R4 represents a terminal group which contains two or three polar groups that are respectively bonded to different carbon atoms, and wherein the carbon atoms to which the polar groups are bonded are bonded to each other via a linking group containing a carbon atom to which the polar groups are not bonded).

Description

technical field [0001] The present invention relates to fluorine-containing ether compounds suitable for use as lubricants for magnetic recording media. [0002] This application claims priority based on Japanese Patent Application No. 2016-047359 for which it applied in Japan on March 10, 2016, and uses the content here. Background technique [0003] In order to increase the recording density of magnetic recording and reproducing devices, development of magnetic recording media suitable for high recording densities has been conducted. [0004] Conventionally, as a magnetic recording medium, a recording layer is formed on a substrate, and a protective layer such as carbon is formed on the recording layer. The protective layer protects the information recorded on the recording layer and improves the slidability of the magnetic head. However, the durability of the magnetic recording medium cannot be sufficiently obtained merely by providing a protective layer on the recordin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C43/23C10M105/54C10M107/38G11B5/725C10N20/04C10N30/06C10N40/18
CPCC10M105/54C10M107/38C10M2211/04C10M2213/04C10M2213/043C07C43/23C07C43/1786C07D277/24C07D303/26C07D333/16C07D409/12C10N2030/06C10N2040/18C10N2050/025G11B5/7257C10M2211/0425G11B5/733
Inventor 柳生大辅山口裕太福本直也加藤刚植竹祥子富田浩幸宫坂隆太伊藤直子太田一朗室伏克己
Owner RESONAC CORP
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