WO2006009057A1 - 記録媒体用潤滑剤および磁気ディスク - Google Patents
記録媒体用潤滑剤および磁気ディスク Download PDFInfo
- Publication number
- WO2006009057A1 WO2006009057A1 PCT/JP2005/012997 JP2005012997W WO2006009057A1 WO 2006009057 A1 WO2006009057 A1 WO 2006009057A1 JP 2005012997 W JP2005012997 W JP 2005012997W WO 2006009057 A1 WO2006009057 A1 WO 2006009057A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- lubricant
- magnetic disk
- recording medium
- formula
- compound represented
- Prior art date
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- 239000000314 lubricant Substances 0.000 title claims abstract description 59
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 34
- 150000001875 compounds Chemical class 0.000 claims abstract description 51
- 239000010702 perfluoropolyether Substances 0.000 claims abstract description 30
- 230000001050 lubricating effect Effects 0.000 claims abstract description 8
- 239000010410 layer Substances 0.000 claims description 19
- 239000011241 protective layer Substances 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 5
- 125000001188 haloalkyl group Chemical group 0.000 claims description 3
- CBOIHMRHGLHBPB-UHFFFAOYSA-N hydroxymethyl Chemical compound O[CH2] CBOIHMRHGLHBPB-UHFFFAOYSA-N 0.000 abstract 2
- 125000004765 (C1-C4) haloalkyl group Chemical group 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 14
- 239000000203 mixture Substances 0.000 description 10
- 238000005481 NMR spectroscopy Methods 0.000 description 8
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 8
- 239000002904 solvent Substances 0.000 description 8
- 238000000354 decomposition reaction Methods 0.000 description 7
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- DKGAVHZHDRPRBM-UHFFFAOYSA-N Tert-Butanol Chemical compound CC(C)(C)O DKGAVHZHDRPRBM-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000003921 oil Substances 0.000 description 5
- LPNYRYFBWFDTMA-UHFFFAOYSA-N potassium tert-butoxide Chemical compound [K+].CC(C)(C)[O-] LPNYRYFBWFDTMA-UHFFFAOYSA-N 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 238000003756 stirring Methods 0.000 description 5
- DZKXDEWNLDOXQH-UHFFFAOYSA-N 1,3,5,2,4,6-triazatriphosphinine Chemical group N1=PN=PN=P1 DZKXDEWNLDOXQH-UHFFFAOYSA-N 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- QAEDZJGFFMLHHQ-UHFFFAOYSA-N trifluoroacetic anhydride Chemical compound FC(F)(F)C(=O)OC(=O)C(F)(F)F QAEDZJGFFMLHHQ-UHFFFAOYSA-N 0.000 description 4
- DJMUYABFXCIYSC-UHFFFAOYSA-N 1H-phosphole Chemical compound C=1C=CPC=1 DJMUYABFXCIYSC-UHFFFAOYSA-N 0.000 description 3
- CTKINSOISVBQLD-UHFFFAOYSA-N Glycidol Chemical compound OCC1CO1 CTKINSOISVBQLD-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 description 3
- 238000005160 1H NMR spectroscopy Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 239000012300 argon atmosphere Substances 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- GKTNLYAAZKKMTQ-UHFFFAOYSA-N n-[bis(dimethylamino)phosphinimyl]-n-methylmethanamine Chemical group CN(C)P(=N)(N(C)C)N(C)C GKTNLYAAZKKMTQ-UHFFFAOYSA-N 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000011541 reaction mixture Substances 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- DFUYAWQUODQGFF-UHFFFAOYSA-N 1-ethoxy-1,1,2,2,3,3,4,4,4-nonafluorobutane Chemical compound CCOC(F)(F)C(F)(F)C(F)(F)C(F)(F)F DFUYAWQUODQGFF-UHFFFAOYSA-N 0.000 description 1
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 241001327708 Coriaria sarmentosa Species 0.000 description 1
- XLYOFNOQVPJJNP-ZSJDYOACSA-N Heavy water Chemical compound [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000004440 column chromatography Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 1
- 125000003827 glycol group Chemical group 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical class CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000012925 reference material Substances 0.000 description 1
- 239000013558 reference substance Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- TXEYQDLBPFQVAA-UHFFFAOYSA-N tetrafluoromethane Chemical compound FC(F)(F)F TXEYQDLBPFQVAA-UHFFFAOYSA-N 0.000 description 1
- -1 trifluoroacetyl ester Chemical class 0.000 description 1
- 238000005583 trifluoroacetylation reaction Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
- C08G65/002—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from unsaturated compounds
- C08G65/005—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from unsaturated compounds containing halogens
- C08G65/007—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from unsaturated compounds containing halogens containing fluorine
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
- C10M169/04—Mixtures of base-materials and additives
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
- C10M169/04—Mixtures of base-materials and additives
- C10M169/041—Mixtures of base-materials and additives the additives being macromolecular compounds only
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/72—Protective coatings, e.g. anti-static or antifriction
- G11B5/725—Protective coatings, e.g. anti-static or antifriction containing a lubricant, e.g. organic compounds
- G11B5/7253—Fluorocarbon lubricant
- G11B5/7257—Perfluoropolyether lubricant
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2213/00—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions
- C10M2213/04—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions obtained from monomers containing carbon, hydrogen, halogen and oxygen
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2213/00—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions
- C10M2213/04—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions obtained from monomers containing carbon, hydrogen, halogen and oxygen
- C10M2213/043—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions obtained from monomers containing carbon, hydrogen, halogen and oxygen used as base material
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2225/00—Organic macromolecular compounds containing phosphorus as ingredients in lubricant compositions
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2225/00—Organic macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2225/003—Organic macromolecular compounds containing phosphorus as ingredients in lubricant compositions used as base material
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/14—Electric or magnetic purposes
- C10N2040/18—Electric or magnetic purposes in connection with recordings on magnetic tape or disc
Definitions
- the present invention relates to a lubricant for a recording medium such as a magnetic disk and a magnetic tape, and a magnetic disk in which a lubricant layer is formed using the lubricant.
- Perfluoropolyether compounds are generally used as lubricants for magnetic disks. Among them, fomblin compounds with low surface energy and low frictional force are made of solbaine. Has become the mainstream. Fomblin compounds are perfluoropolyether compounds having a basic skeleton force S (CF CF 3 O) (CF 2 O) of the main chain.
- the fomblin compound is contained in the head member, and alumina (Al 2 O 3)
- the drive system of the magnetic disk drive is a contact 'start' stop (CSS) system where the head and the disk come into contact when the device starts Z stops, and the head retracts outside the disk surface when stopped
- SCS contact 'start' stop
- LZUL ramp 'load' unload
- a fomblin perfluoropolyether compound having a plurality of polar groups in the molecule for example, “Z-TetraolJ” manufactured by Solvaine Earth
- the end of the perfluoropolyether skeleton is a phosphazene functional group as a compound that suppresses the decomposition reaction by alumina despite having a perfluoropolyether chain in the molecule.
- a compound modified with a group is known (US Pat. No. 6608009, US Pat. No. 6,605,335).
- the rotational speed of the magnetic disk is expected to be 15 or more in the near future.
- the amount of lubricant scattered tends to increase.
- the lubricating layer becomes thinner due to the decomposition, and eventually the magnetic disk is destroyed.
- a lubricant that has strong adhesion to the magnetic disk and is difficult to disassemble is required.
- An object of the present invention is to provide a lubricant for a recording medium that has strong adhesion to the recording medium and is difficult to decompose.
- the present invention provides a recording medium lubricant and a magnetic disk as described below.
- R m and n are as defined above, and R 3 represents —OCH CH (OH) CH OCH CH (0
- a recording layer and a protective layer are formed in this order on a support, and the above item is formed on the surface of the protective layer.
- the perfluoropolyether compound contained in the recording medium lubricant of the present invention has a cyclotriphosphazene functional group at one end of the perfluoropolyether chain.
- the recording medium lubricant of the present invention is produced, for example, as follows.
- a perfluoropolyether compound having a cyclotriphosphazene functional group at one end and one hydroxyl group at the other end, botasym tbutoxide, and t-butanol stir at 70 ° C for 30 minutes. After the potassium-t-butoxide is dissolved, 0.5 to 2.0 equivalents of 2,3 epoxy-1-propanol is slowly added dropwise over 2 hours with stirring at 70 ° C. After completion of dropping, the mixture is further stirred at 70 ° C for 2 hours. After completion of the reaction, extraction is performed with a perfluorocarbon solvent, and the solvent is removed by distillation to obtain a viscous liquid.
- the obtained viscous liquid is a perfluoropolyether compound represented by the above formula (1), a perfluoropolyether compound represented by the above formula (2), and a formula (3);
- This three-component mixture can be used as it is as a lubricant for recording media of the present invention, but it can be used after being purified by a purification method such as column chromatography or supercritical carbonic acid extraction. .
- the perfluoropolyether compound represented by the above formula (1) and the perfluoropolyether compound represented by the above formula (2) are used. It is preferable that the total content ratio of the perfluoropolyether compound represented by the above formula (1) is 50% by weight or more and the perfluoropolyether compound content is 30% by weight or more. The total content of the perfluoropolyether compound and the perfluoropolyether compound represented by the above formula (2) is 70% by weight or more, and the perfluoropolyether compound represented by the above formula (1) is used. More preferably, the content ratio of the fluoropolyether compound is 0% by weight or more.
- Perfluoropolyether compound having a cyclotriphosphazene functional group at one end and one hydroxyl group at the other end is, for example, manufactured by Matsumura Oil Research Co., Ltd. "Morescophosphalol A20H" is mentioned. The chemical structure of this is (CF C H O)-P N -CH CF O- (CF CF O)-(CF O)
- the number average molecular weight is about 1300-8000.
- the use of the recording medium lubricant of the present invention includes use as a lubricant for improving the sliding characteristics of a magnetic disk in a magnetic disk device.
- the purpose of this is to reduce the coefficient of friction between the magnetic disk and the head, and therefore, as a lubricant in other recording devices in which sliding occurs between the recording medium such as magnetic tape and the head in addition to the magnetic disk.
- it can be used as a lubricant for equipment having a sliding part.
- the lubricant of the present invention is a Fomblin type par It can also be used in combination with a fomblin lubricant because it also exhibits an effect of suppressing the decomposition of the fluoropolyether compound.
- non-fomblin lubricants for example, Daikin Industries
- a recording layer and a protective layer are formed in this order on a support, and a lubricating layer made of the recording medium lubricant is formed on the surface of the protective layer.
- FIG. 1 shows an outline of the configuration (cross section) of an example of the magnetic disk of the present invention.
- the magnetic disk of the present invention has a recording layer 2 on a support 1, a protective layer 3 on the recording layer 2, and a lubricant for the above-described lubricant for the recording medium.
- Layer 4 is the outermost layer.
- Examples of the material of the support 1 include aluminum alloy, glass, and polycarbonate.
- Examples of the material of the recording layer 2 include alloys in which chromium, platinum, tantalum and the like are included in an element capable of forming a ferromagnetic material such as iron, cobalt, and nickel, or oxides thereof. These are formed by a plating method, a sputtering method or the like.
- Examples of the material for the protective layer 3 include diamond-like carbon, SiN, SiC, and SiO. These include sputtering, CVD, etc.
- the lubricating layer 4 is usually formed by the dipping method using the recording medium lubricant of the present invention dissolved in a solvent and using this solution.
- a solvent capable of dissolving the recording medium lubricant of the present invention is used.
- fluorocarbon solvents for example, “PF-5060”, “PF-5080”, “HFE-7100”, “HFE-7200” manufactured by Sumitomo 3EM, “Bertrel XF” manufactured by DuPont
- the lubricant for recording medium of the present invention has strong adhesion to the recording medium, so that scattering can be reduced and hardly decomposed.
- a magnetic disk having a lubricating layer formed using the lubricant can withstand continuous sliding under high-speed rotation, and a magnetic disk drive equipped with the magnetic disk can perform recording Z reproduction at high speed. It becomes possible.
- FIG. 1 is a schematic cross-sectional view showing an example of a magnetic disk of the present invention.
- reaction mixture was extracted by adding “Bertrel XF” manufactured by DuPont and washed with an aqueous solution containing 1N hydrochloric acid and methanol. Distilling away “Bertrel?” Gave 14.0 g of viscous liquid.
- the obtained viscous liquid was subjected to 19 F-NMR analysis and 1 H-NMR analysis, and the number average molecular weight and composition (% by weight) were calculated.
- the number average molecular weight was 2929.
- the composition is shown in Table 1.
- the compound of the formula (1) is a perfluoropolyether compound represented by the above formula (1) in which R is a trifluoromethyl group.
- the compound of the formula (2) is a perfluoropolyether compound represented by the above formula (2) in which R is a trifluoromethyl group.
- the compound of the formula (3) is a perfluoropolyether compound represented by the above formula (3) in which R is a trifluoromethyl group.
- reaction mixture was extracted by adding “Bertrel XF” manufactured by DuPont and washed with an aqueous solution containing 1N hydrochloric acid and methanol. After distilling away “Bertrel XF” by distillation, purification was performed by supercritical carbonic acid extraction to obtain 22.3 g of viscous liquid.
- the obtained viscous liquid was subjected to 19 F-NMR analysis and 1 H-NMR analysis, and the number average molecular weight and composition (% by weight) were calculated. The number average molecular weight was 3130.
- the composition is shown in Table 2.
- Table 2 the compound of formula (1), the compound of formula (2) and the compound of formula (3) are the same as in Table 1.
- the viscous liquid (lubricant) obtained in Examples 1 and 2 was dissolved in “Bertrel XF” manufactured by DuPont to prepare each lubricant solution (0.1 wt%). Glass media with a diameter of 2.5 inches A magnetic disk was immersed in a lubricant solution for 1 minute, pulled up at a speed of 2 mmZs and coated with a lubricant, and then this magnetic disk was placed in a 100 ° C constant temperature bath for 20 minutes and heated. The film thickness of the lubricant on the disk was measured with an ellipsometer (this film thickness is designated as eA).
- this disk was immersed in “Bertrel XF” for 10 minutes, pulled up at a speed of lOmmZs, and adhered to clean the V, lubricant.
- the film thickness of the lubricant remaining on the disk was measured with an ellipsometer (this film thickness is assumed to be f A).
- the strength of adhesion to the disc is determined by the following formula: The rate was evaluated using the command rate. The results are shown in Table 3.
- Bond rate (%) 100 X f / e
- the compound of formula (1) the compound of formula (2) and the compound of formula (3) contained in the viscous liquid (lubricant) obtained in Examples 1 and 2, the compound of formula (3) ) Is removed by the above washing. Therefore, the compound of the formula (1) and the compound of the formula (2) having strong adhesive force remain on the disk.
- the viscous liquid (lubricant) obtained in Example 1 was dissolved in “Bertrel XF” manufactured by DuPont to prepare a lubricant solution (0.1 wt%).
- a 2.5-inch diameter glass media magnetic disk consisting of a support, a recording layer and a protective layer is immersed in a lubricant solution for 1 minute, pulled up at a speed of 2 mmZs and coated with a lubricant.
- the disc was heated for 20 minutes. Next, this disc was immersed in “Bertrel XF” for 10 minutes, and was pulled up at a speed of 1 OmmZs to be cleaned.
- the film thickness of the lubricant remaining on the disk was measured with an ellipsometer.
- the film thickness of the lubricant was 4.9A.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Lubricants (AREA)
- Magnetic Record Carriers (AREA)
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006529111A JP4570622B2 (ja) | 2004-07-23 | 2005-07-14 | 記録媒体用潤滑剤および磁気ディスク |
US11/628,158 US7670695B2 (en) | 2004-07-23 | 2005-07-14 | Lubricant for recording medium and magnetic disk |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004240118 | 2004-07-23 | ||
JP2004-240118 | 2004-07-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006009057A1 true WO2006009057A1 (ja) | 2006-01-26 |
Family
ID=35785170
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/012997 WO2006009057A1 (ja) | 2004-07-23 | 2005-07-14 | 記録媒体用潤滑剤および磁気ディスク |
Country Status (4)
Country | Link |
---|---|
US (1) | US7670695B2 (ja) |
JP (1) | JP4570622B2 (ja) |
CN (1) | CN1989228A (ja) |
WO (1) | WO2006009057A1 (ja) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007083792A1 (ja) * | 2006-01-23 | 2007-07-26 | Hoya Corporation | 磁気ディスク |
WO2008140121A1 (ja) * | 2007-05-15 | 2008-11-20 | Matsumura Oil Research Corp. | パ-フルオロポリエ-テル化合物、およびこれを用いた潤滑剤ならびに磁気ディスク |
US20110143165A1 (en) * | 2008-09-05 | 2011-06-16 | Moresco Corporation | Lubricant and magnetic disk |
US7998912B2 (en) * | 2009-09-14 | 2011-08-16 | Wd Media, Inc. | Composite lubricant for hard disk media |
WO2011136379A1 (ja) * | 2010-04-26 | 2011-11-03 | 株式会社Moresco | シクロホスファゼン化合物、及びこれを用いた潤滑剤ならびに磁気ディスク |
JP2013175279A (ja) * | 2013-06-12 | 2013-09-05 | Fuji Electric Co Ltd | 磁気記録媒体 |
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JP5975368B2 (ja) * | 2013-12-09 | 2016-08-23 | 株式会社Moresco | フルオロポリエーテル化合物、およびこれを用いた潤滑剤ならびに磁気ディスク |
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CN114550755A (zh) * | 2016-02-22 | 2022-05-27 | 昭和电工株式会社 | 含氟醚化合物、磁记录介质用润滑剂及磁记录介质 |
CN114550755B (zh) * | 2016-02-22 | 2023-09-29 | 株式会社力森诺科 | 含氟醚化合物、磁记录介质用润滑剂及磁记录介质 |
Also Published As
Publication number | Publication date |
---|---|
US20080020171A1 (en) | 2008-01-24 |
US7670695B2 (en) | 2010-03-02 |
JP4570622B2 (ja) | 2010-10-27 |
JPWO2006009057A1 (ja) | 2008-05-01 |
CN1989228A (zh) | 2007-06-27 |
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