ORGANIC FLUORINE COMPOUND, LUBRICANT, AND PROCESSING METHOD OF MAGNETIC RECORDING MEDIUM

• US 20200131310A1
• Filed: 06/27/2018
• Published: 04/30/2020
• Est. Priority Date: 06/30/2017
• Status: Active Grant

• Current Assignee: Resonac Corp. (Resonac Holdings Corp.)
• Original Assignee: Showa Denko KK (Resonac Holdings Corp.)
• Inventors: WATANABE, Kentaro, UEDA, Yasuyuki, HANAWA, Kenzo
• Granted Patent: US 11,820,862 B2
• Time in Patent Office: Days
• CPC Class Codes: C08F 299/02 from unsaturated polycondensates
• CPC Class Codes: C08G 65/007 containing fluorine
• CPC Class Codes: C08G 65/32 Polymers modified by chemical after-treatment
• CPC Class Codes: C08G 65/321 with inorganic compounds
• CPC Class Codes: C08G 65/3344 containing oxygen in addition to sulfur
• CPC Class Codes: C08G 65/337 containing other elements organic compounds containing halogens only as halides of a carboxyl group C08G65/332
• CPC Class Codes: C10M 107/38 containing halogen
• CPC Class Codes: C10M 147/04 Monomer containing carbon, hydrogen, halogen and oxygen
• CPC Class Codes: C10M 2201/041 Carbon; Graphite; Carbon black
• CPC Class Codes: C10M 2213/06 Perfluoro polymers
• CPC Class Codes: C10N 2020/04 Molecular weight; Molecular weight distribution
• CPC Class Codes: C10N 2030/06 Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
• CPC Class Codes: C10N 2040/18 in connection with recordings on magnetic tape or disc
• CPC Class Codes: C10N 2050/023 Multi-layer lubricant coatings
• CPC Class Codes: G11B 5/7257 Perfluoropolyether lubricant
• CPC Class Codes: G11B 5/84 Processes or apparatus specially adapted for manufacturing record carriers
• CPC Class Codes: G11B 5/8408 protecting the magnetic layer

Abstract

According to one aspect of the present invention, an organic fluorine compound is represented by a general formula

(R-π-E-CH₂)₂-A  (1A)

(where A is a divalent perfluoropolyether group, π is an arylene group or a single bond, R is an alkenyl group or an alkynyl group, and E is an ether bond or an ester bond or a group that is represented by a chemical formula

—O—CH₂CH(OH)CH₂O—

two groups each of which is represented by a general formula

R-π-E-CH₂—

may be the same or different, and at least one n among two π is an arylene group).

Claims

1. An organic fluorine compound that is represented by a general formula

(R-π

-E-CH₂)₂-A 

 

(1A)

where A is a divalent perfluoropolyether group, π

is an arylene group or a single bond, R is an alkenyl group or an alkynyl group, and E is an ether bond or an ester bond or a group that is represented by a chemical formula

—

O—

CH₂CH(OH)CH₂O—

two groups each of which is represented by a general formula

R-π

-E-CH₂—

may be the same or different, and at least one π

among two π

is an arylene group.

2. The organic fluorine compound according to claim 1, wherein the A is a straight chain group.

3. The organic fluorine compound according to claim 1, wherein a plurality of the R are the same.

4. The organic fluorine compound according to claim 1, wherein a plurality of the π

are the same.

5. The organic fluorine compound according to claim 1, wherein a plurality of the E are the same.

6. The organic fluorine compound according to claim 1, wherein a carbon number of the A is 1 to 100.

7. The organic fluorine compound according to claim 1, wherein the A includes at least one of groups each of which is represented by a general formula

—

(CF₂)_xO—

 

 

(2)

(where x is an integer of 1 to

     5).

8. The organic fluorine compound according to claim 7, wherein the A includes 1 to 50 groups each of which is represented by the general formula (2) in which the x is 1 or 2.

9. The organic fluorine compound according to claim 1, wherein an average formula weight of the A is in a range of 250 to 6000.

10. The organic fluorine compound according to claim 1, wherein the organic fluorine compound is

a compound that is represented by a chemical formula

11. A lubricant containing the organic fluorine compound according to claim 1.

12. A processing method of a magnetic recording medium comprising:

applying the lubricant according to claim 11 to the magnetic recording medium; and

irradiating the lubricant applied to the magnetic recording medium with ultraviolet light.