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

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

Pending Publication Date: 2022-08-02
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, lubricant for magnetic recording medium, and magnetic recording medium
  • Fluorine-containing ether compound, lubricant for magnetic recording medium, and magnetic recording medium
  • Fluorine-containing ether compound, lubricant for magnetic recording medium, and magnetic recording medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0284] The compound represented by the above formula (A) is produced by the method shown below.

[0285] First, a compound was obtained by reacting diallylamine with di-tert-butyl dicarbonate in methanol. Next, the obtained compound was oxidized using m-chloroperbenzoic acid in dichloromethane to synthesize a compound represented by the following formula (20).

[0286]

[0287] (t-Bu in formula (20) represents a tert-butyl group.)

[0288] Next, put HOCH in a 200 mL eggplant-shaped flask under a nitrogen atmosphere 2 CF 2 O(CF 2 CF 2 O) m (CF 2 O) n CF 2 CH 2 20 g of fluoropolyether (number average molecular weight 1000, molecular weight distribution 1.1) represented by OH (where m representing the average degree of polymerization is 4.5, and n representing the average degree of polymerization is 4.5), and the compound represented by the formula (20) 9.39 g (molecular weight 213.14, 44 mmol) and 20 mL of t-butanol were stirred at room temperature until uniform.

...

Embodiment 2

[0295] Except having used the compound represented by following formula (21) 10.6g instead of the compound represented by formula (20), it carried out the same operation as Example 1, and obtained compound (B) 12.8g. In the formula (B), mb representing the average degree of polymerization is 4.5, and nb representing the average degree of polymerization is 4.5.

[0296] The compound represented by formula (21) is synthesized by protecting the amino group of dibutenylamine with di-tert-butyl dicarbonate and oxidizing the double bond.

[0297]

[0298] (t-Bu in formula (21) represents a tert-butyl group.)

[0299] Carry out the obtained compound (B) 1 As a result of H-NMR measurement, the structure was identified by the following results.

[0300] compound (B); 1 H-NMR (CD 3 COCD 3 );

[0301] δ[ppm] 1.6~2.0(4H), 2.2~2.4(4H), 3.4~4.0(18H), 5.0~5.1(2H), 5.1~5.2(2H), 5.8~6.0(2H)

Embodiment 3

[0303] In place of the compound represented by the formula (20), 9.47 g of the compound represented by the following formula (22) was used in the same manner as in Example 1 to obtain 12.3 g of the compound (C). In the formula (C), mc representing the average degree of polymerization is 4.5, and nc representing the average degree of polymerization is 4.5.

[0304] The compound represented by formula (22) is synthesized by protecting the amino group of propylamine with di-tert-butyl dicarbonate and reacting it with epibromohydrin.

[0305]

[0306] (t-Bu in formula (22) represents a tert-butyl group.)

[0307] Carry out the obtained compound (C) 1 As a result of H-NMR measurement, the structure was identified by the following results.

[0308] compound (C); 1 H-NMR (CD 3 COCD 3 );

[0309] δ[ppm]0.8~1.0(6H), 1.5~1.6(4H), 3.3~4.2(18H)

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Abstract

A fluorine-containing ether compound represented by formula (1). R < 1 >-R < 2 >-CH < 2 >-R < 3 >-CH < 2 >-R < 4 >-R < 5 > (wherein R < 3 > is a perfluoropolyether chain; each of R1 and R5 independently represents an optionally substituted alkyl group, an organic group having a double bond or a triple bond, or a hydrogen atom; -R < 2 >-CH < 2 >-R < 3 > is represented by-[A]-[B]-O-CH < 2 >-R < 3 >; r < 3 >-CH < 2 >-R < 4 > is represented by R < 3 >-CH < 2 >-O-[C]-[D]-; [A] is represented by formula (4), [B] is represented by formula (5), [C] is represented by formula (6), and [D] is represented by formula (7). )

Description

technical field [0001] The present invention relates to a fluorine-containing ether compound, a lubricant for a magnetic recording medium, and a magnetic recording medium. [0002] This application claims priority based on Japanese Patent Application No. 2019-236885 filed in Japan on December 26, 2019, the content of which is incorporated herein by reference. Background technique [0003] In order to increase the recording density of the magnetic recording and reproducing apparatus, development of a magnetic recording medium suitable for a high recording density has been carried out. [0004] Conventionally, as a magnetic recording medium, there is a magnetic recording medium in which 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, only by providing a protective layer on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C217/28C08G65/333C10N20/04C10N30/00C10N30/06C10N40/18G11B5/725C07C217/84C10M105/54C10M107/38
CPCC07C217/28C07C217/84C08G65/333C10M107/38G11B5/7257C08G65/007C08G65/3312C08G65/33306C10N2040/18C10N2050/02C10M2213/0606C10N2030/06C10N2050/025C10M2213/043C10N2070/00
Inventor 南口晋毅
Owner RESONAC CORP