JPS62188022A - Magnetic recording medium containing cerium oxide - Google Patents
Magnetic recording medium containing cerium oxideInfo
- Publication number
- JPS62188022A JPS62188022A JP61030190A JP3019086A JPS62188022A JP S62188022 A JPS62188022 A JP S62188022A JP 61030190 A JP61030190 A JP 61030190A JP 3019086 A JP3019086 A JP 3019086A JP S62188022 A JPS62188022 A JP S62188022A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- magnetic recording
- layer
- recording medium
- ceo2
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 52
- 229910000420 cerium oxide Inorganic materials 0.000 title claims description 15
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 title claims description 15
- 239000000470 constituent Substances 0.000 claims abstract description 13
- 239000002245 particle Substances 0.000 abstract description 31
- 238000004140 cleaning Methods 0.000 abstract description 5
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 abstract 4
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 abstract 4
- 239000000843 powder Substances 0.000 description 21
- -1 myristic acid, fatty acid ester Chemical class 0.000 description 12
- 239000000945 filler Substances 0.000 description 11
- 238000000576 coating method Methods 0.000 description 9
- 229920005989 resin Polymers 0.000 description 9
- 239000011347 resin Substances 0.000 description 9
- 239000011230 binding agent Substances 0.000 description 8
- 239000011248 coating agent Substances 0.000 description 8
- 239000006247 magnetic powder Substances 0.000 description 8
- 229910045601 alloy Inorganic materials 0.000 description 7
- 239000000956 alloy Substances 0.000 description 7
- 239000002270 dispersing agent Substances 0.000 description 7
- 239000012948 isocyanate Substances 0.000 description 7
- 239000003973 paint Substances 0.000 description 7
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 6
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 6
- 239000000314 lubricant Substances 0.000 description 6
- 239000000654 additive Substances 0.000 description 5
- 229920001577 copolymer Polymers 0.000 description 5
- 235000014113 dietary fatty acids Nutrition 0.000 description 5
- 239000000194 fatty acid Substances 0.000 description 5
- 229930195729 fatty acid Natural products 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 4
- 239000003082 abrasive agent Substances 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 4
- 239000006229 carbon black Substances 0.000 description 4
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 4
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 description 4
- 150000002483 hydrogen compounds Chemical class 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 150000002513 isocyanates Chemical class 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000002609 medium Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 4
- 229910010271 silicon carbide Inorganic materials 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
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- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
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- 125000004432 carbon atom Chemical group C* 0.000 description 3
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- 238000009826 distribution Methods 0.000 description 3
- 150000004665 fatty acids Chemical class 0.000 description 3
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 3
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- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid group Chemical class S(O)(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 3
- 230000003746 surface roughness Effects 0.000 description 3
- QIVUCLWGARAQIO-OLIXTKCUSA-N (3s)-n-[(3s,5s,6r)-6-methyl-2-oxo-1-(2,2,2-trifluoroethyl)-5-(2,3,6-trifluorophenyl)piperidin-3-yl]-2-oxospiro[1h-pyrrolo[2,3-b]pyridine-3,6'-5,7-dihydrocyclopenta[b]pyridine]-3'-carboxamide Chemical compound C1([C@H]2[C@H](N(C(=O)[C@@H](NC(=O)C=3C=C4C[C@]5(CC4=NC=3)C3=CC=CN=C3NC5=O)C2)CC(F)(F)F)C)=C(F)C=CC(F)=C1F QIVUCLWGARAQIO-OLIXTKCUSA-N 0.000 description 2
- IIZPXYDJLKNOIY-JXPKJXOSSA-N 1-palmitoyl-2-arachidonoyl-sn-glycero-3-phosphocholine Chemical compound CCCCCCCCCCCCCCCC(=O)OC[C@H](COP([O-])(=O)OCC[N+](C)(C)C)OC(=O)CCC\C=C/C\C=C/C\C=C/C\C=C/CCCCC IIZPXYDJLKNOIY-JXPKJXOSSA-N 0.000 description 2
- GZVHEAJQGPRDLQ-UHFFFAOYSA-N 6-phenyl-1,3,5-triazine-2,4-diamine Chemical compound NC1=NC(N)=NC(C=2C=CC=CC=2)=N1 GZVHEAJQGPRDLQ-UHFFFAOYSA-N 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 2
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 2
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 239000005639 Lauric acid Substances 0.000 description 2
- 239000004640 Melamine resin Substances 0.000 description 2
- 229920000877 Melamine resin Polymers 0.000 description 2
- 229910018104 Ni-P Inorganic materials 0.000 description 2
- 229910018536 Ni—P Inorganic materials 0.000 description 2
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- ULUAUXLGCMPNKK-UHFFFAOYSA-N Sulfobutanedioic acid Chemical class OC(=O)CC(C(O)=O)S(O)(=O)=O ULUAUXLGCMPNKK-UHFFFAOYSA-N 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 239000002216 antistatic agent Substances 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- AYTAKQFHWFYBMA-UHFFFAOYSA-N chromium dioxide Chemical compound O=[Cr]=O AYTAKQFHWFYBMA-UHFFFAOYSA-N 0.000 description 2
- 229910000423 chromium oxide Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- QXYJCZRRLLQGCR-UHFFFAOYSA-N dioxomolybdenum Chemical compound O=[Mo]=O QXYJCZRRLLQGCR-UHFFFAOYSA-N 0.000 description 2
- LZCLXQDLBQLTDK-UHFFFAOYSA-N ethyl 2-hydroxypropanoate Chemical compound CCOC(=O)C(C)O LZCLXQDLBQLTDK-UHFFFAOYSA-N 0.000 description 2
- 229920000578 graft copolymer Polymers 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
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- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000787 lecithin Substances 0.000 description 2
- 235000010445 lecithin Nutrition 0.000 description 2
- 229940067606 lecithin Drugs 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
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- 229920006287 phenoxy resin Polymers 0.000 description 2
- 150000003014 phosphoric acid esters Chemical class 0.000 description 2
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 description 2
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- 150000003839 salts Chemical class 0.000 description 2
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- 239000002904 solvent Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 2
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 2
- 239000001993 wax Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- BHHYHSUAOQUXJK-UHFFFAOYSA-L zinc fluoride Chemical compound F[Zn]F BHHYHSUAOQUXJK-UHFFFAOYSA-L 0.000 description 2
- WSLDOOZREJYCGB-UHFFFAOYSA-N 1,2-Dichloroethane Chemical compound ClCCCl WSLDOOZREJYCGB-UHFFFAOYSA-N 0.000 description 1
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 1
- OCJBOOLMMGQPQU-UHFFFAOYSA-N 1,4-dichlorobenzene Chemical compound ClC1=CC=C(Cl)C=C1 OCJBOOLMMGQPQU-UHFFFAOYSA-N 0.000 description 1
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- OCRHWQFQIIHELB-UHFFFAOYSA-N C(CCCCCCCCCCCCCCCCC)(=O)OCCCC.C(CCCCCCCCCCCCCCC)(=O)O Chemical compound C(CCCCCCCCCCCCCCCCC)(=O)OCCCC.C(CCCCCCCCCCCCCCC)(=O)O OCRHWQFQIIHELB-UHFFFAOYSA-N 0.000 description 1
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- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 229910020630 Co Ni Inorganic materials 0.000 description 1
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- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 1
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- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 1
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 description 1
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- 239000009719 polyimide resin Substances 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- PUDIUYLPXJFUGB-UHFFFAOYSA-N praseodymium atom Chemical compound [Pr] PUDIUYLPXJFUGB-UHFFFAOYSA-N 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- 239000001397 quillaja saponaria molina bark Substances 0.000 description 1
- 238000007763 reverse roll coating Methods 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 229930182490 saponin Natural products 0.000 description 1
- 150000007949 saponins Chemical class 0.000 description 1
- 239000011163 secondary particle Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- IIACRCGMVDHOTQ-UHFFFAOYSA-N sulfamic acid Chemical class NS(O)(=O)=O IIACRCGMVDHOTQ-UHFFFAOYSA-N 0.000 description 1
- 150000003460 sulfonic acids Chemical class 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-O sulfonium group Chemical group [SH3+] RWSOTUBLDIXVET-UHFFFAOYSA-O 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 description 1
- TUNFSRHWOTWDNC-HKGQFRNVSA-N tetradecanoic acid Chemical compound CCCCCCCCCCCCC[14C](O)=O TUNFSRHWOTWDNC-HKGQFRNVSA-N 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- ITRNXVSDJBHYNJ-UHFFFAOYSA-N tungsten disulfide Chemical compound S=[W]=S ITRNXVSDJBHYNJ-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Landscapes
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
Abstract
Description
【発明の詳細な説明】
（１）産業上の利用分野
本発明は、磁気テープ、磁気シート、磁気ディスク等の
磁気記録媒体に関するものである。DETAILED DESCRIPTION OF THE INVENTION (1) Industrial Application Field The present invention relates to magnetic recording media such as magnetic tapes, magnetic sheets, and magnetic disks.
（２）従来技術
一般に、磁気記録媒体は、磁性粉とバインダー等を含む
磁性塗料を支持体上に塗布、乾燥して製造される。近時
、磁気記録材料の発展に伴ない、ビデオ用、電算機用、
オーディオ用等の磁気テープにおいては、高度なテープ
性能が要求されるようになっている。テープの相対速度
の大きいビデオテープ等においては、特にスチル耐久性
、安定で順調な走行性が要求されている。このため、テ
ープ自体の耐摩耗性は勿論、走行時のテープの摩擦を低
下せしめることが極めて重要である。(2) Prior Art Generally, magnetic recording media are manufactured by applying a magnetic paint containing magnetic powder, a binder, etc. onto a support and drying it. In recent years, with the development of magnetic recording materials, materials for video, computers,
Magnetic tapes for audio use and the like are now required to have high tape performance. In video tapes and the like where the relative speed of the tape is high, still durability and stable and smooth running performance are particularly required. Therefore, it is extremely important not only to improve the abrasion resistance of the tape itself but also to reduce the friction of the tape during running.
また一方に於て磁気テープへの記録入力、逆に記録内容
の出力に際して該記録の転収は真実性の高いことが必要
であって、磁気テープ上の塵、傷或は形状欠陥並びに磁
気ヘッドの汚れ、損耗等による電磁変換に不全があって
はならない。On the other hand, when inputting data to a magnetic tape, and conversely when outputting recorded content, the transfer of the recorded data must be highly accurate, and dust, scratches, or shape defects on the magnetic tape as well as magnetic head There must be no failure in electromagnetic conversion due to dirt, wear, etc.
従来前記した磁気テープの走行性及び耐摩耗性を向上す
る手段としてテープ表面の滑面性が考えられ、該滑面性
について２つの方向から対策が講じられている。Conventionally, the smoothness of the tape surface has been considered as a means of improving the running properties and abrasion resistance of the magnetic tape described above, and measures have been taken from two directions to improve the smoothness.
その１つは磁気テープの走行中テープ摺擦面自体の摩擦
係敬を低下させ摺擦面に１脂滑性“を与える滑面剤の添
加である。One of these is the addition of a lubricating agent which reduces the friction of the tape sliding surface itself during running of the magnetic tape and gives the sliding surface a level of lubricity.
例工ば、シリコーンオイル、カーボンブランクグラフト
ポリマー、ラウリル酸、ミリスチン酸、脂肪酸エステル
（いわゆるロウ）等も使用できる。For example, silicone oil, carbon blank graft polymer, lauric acid, myristic acid, fatty acid ester (so-called wax), etc. can also be used.
これらの滑面剤は結着剤１００重量部に対して０．２〜
加重量部の範囲で添加される。These lubricants are used in an amount of 0.2 to 100 parts by weight of the binder.
It is added in a weighted amount of parts.
しかしながら、これらの滑面剤の添加によっても未だ充
分な特性を得るには至っておらず、特にズルーミング或
は眉間粘着等の他種の支障を惹起する危険を孕んでいる
。However, even with the addition of these lubricants, sufficient properties have not yet been obtained, and there is a risk of causing other problems such as zooming or glabellar adhesion.
また他の１つは摺擦す、る層に適度に微細な固体粒子か
らなる粉末（充填剤；フィラー）を含ませ、層表に突起
した該固体粒子を支点として、相手方の対向摺擦面と該
摺擦層本体とを隔離して支え、相互に接触面積を小にし
て両面間の摩擦抵抗を減する減抗法がとられる。前記の
脂滑性に対応して謂えば １支滑性“が添加されたフィ
ラー（一般にマット剤と称される）によって摺擦層に与
えられる。Another method involves impregnating the layer to be rubbed with a powder (filler) consisting of appropriately fine solid particles, and using the solid particles protruding on the layer surface as a fulcrum, the opposing sliding surface is A drag reduction method is used to separate and support the friction layer and the main body of the rubbing layer, thereby reducing the mutual contact area and reducing the frictional resistance between the two surfaces. Corresponding to the above-mentioned greasy lubricity, so-called ``slippery'' is imparted to the rubbing layer by the added filler (generally referred to as a matting agent).
前記フィラーとしては有機質及び／または無機質粉末が
用いられる。例えば有機質粉末としては、アクリルスチ
レン系樹脂、ベンゾグアナミン系樹脂粉末、メラミン系
樹脂粉末、フタロシアニン系顔料、無機質粉末としては
酸化珪素、炭酸カルシウム、硫酸バリウム、炭化珪素、
窒化硼素等が挙げられる。As the filler, organic and/or inorganic powder is used. For example, organic powders include acrylic styrene resin, benzoguanamine resin powder, melamine resin powder, and phthalocyanine pigments; inorganic powders include silicon oxide, calcium carbonate, barium sulfate, silicon carbide,
Examples include boron nitride.
前記のように、脂滑性、皮屑性の両方から摺擦面の滑面
性を上げ、走行性、耐摩耗性に対処している。As mentioned above, the smoothness of the rubbing surface is improved in terms of both greasiness and flakiness, and running properties and abrasion resistance are addressed.
脈って前記皮屑性を与えるフィラー粒子に、粒子の大き
さ、形状、硬度及び摺擦面に現われる該粒子の作る突起
の面密度を選べば該面にサンドペーパと同様の研磨性を
与えることができる。If the size, shape, hardness, and areal density of the protrusions formed by the particles that appear on the rubbing surface are selected for the filler particles that pulse and give the above-mentioned flakiness, it is possible to give the surface the same abrasiveness as sandpaper. I can do it.
上記の研磨性を有する摺擦面によって磁気ヘッドを摺擦
すれば、磁気ヘッドづまり、汚れを除去してヘッド性能
の劣化を防止し、磁気ヘッドに於る記録転収の真実性を
高めることができる。この用に供する添加素材は従来一
般に研磨剤と称され、該研磨剤にはモース硬度６以上、
平均粒子径０．７μｍ以下の、一般には０．４〜０．６
μｍのものが用いられる。平均粒径が０．７μｍを越え
るとテープの走行性及び磁気ヘッドのクリーニング効果
は良好であるが磁性層表面が粗くなり、Ｓ／Ｎ比の劣化
、ドロップアウトの増加が起る。一方０．４μｍ以下に
な°ると走行性及びクリーニング効果が著じるしく低下
する。By rubbing the magnetic head with the above-mentioned abrasive rubbing surface, it is possible to remove clogs and dirt from the magnetic head, prevent deterioration of head performance, and improve the authenticity of recording transfer in the magnetic head. can. The additive material used for this purpose is conventionally generally called an abrasive, and the abrasive has a Mohs hardness of 6 or more,
Average particle size of 0.7 μm or less, generally 0.4 to 0.6
μm is used. If the average particle size exceeds 0.7 μm, the running properties of the tape and the cleaning effect of the magnetic head are good, but the surface of the magnetic layer becomes rough, resulting in deterioration of the S/N ratio and increase in dropouts. On the other hand, if the thickness is less than 0.4 μm, the runnability and cleaning effect are significantly reduced.
研磨剤としては例えばＡｌｔｏｓ、Ｃｒ ２０３、Ｔｉ
Ｏ２、ＳｉＣ，５ｉ０２等が挙げられる。Examples of abrasives include Altos, Cr 203, Ti
Examples include O2, SiC, 5i02, and the like.
研磨剤の添加賃としては磁性粉１００重量部に対して１
〜２０ Ｍ １１部が用いられている。The additive amount of abrasive is 1 per 100 parts by weight of magnetic powder.
~20M 11 parts are used.
前記した固体粒子からなるフィラーを用いる場合、更に
該固体粒子の分散性に注意する必要がある。When using a filler made of the solid particles described above, it is necessary to pay attention to the dispersibility of the solid particles.
磁気テープに高性能が要求されるに従いテープ表面はま
すます平坦且つ平滑であることが要求される。As magnetic tapes are required to have higher performance, the tape surface is required to be increasingly flat and smooth.
従って磁性粉をはじめ前記フィラー粒子は益々微細な一
次粒子が用いられるが、−次粒子が微細になるに従いそ
の表面活性、分散媒との親和性等の要因から二次粒子と
しての凝集塊を生じ易く、遮光性、導電性向上を目的と
して添加されるカーボンブラックのようなフィラーもそ
の凝集塊はドロップアウト等の障害を生じ、一般的フィ
ラーに於ては、該凝集塊によるドロップアウトに加え、
バインダーの粒子保着力が不充分となるための粉落ち、
粗面でありすぎるためのデツキのテープ走行部材損耗及
び磁気ヘッドの傷損による機能障害を起す。例えば特公
昭５０−３９２７号に記載されているアルミナ粒子のよ
うにバンクコート層がガイドピン等と接触するとき、特
に該ガイドピン等が有機樹脂部材であるときにはこのピ
ン等を削ってしまい、その磁気テープを円滑に案内走行
させるガイドピンの機能を害する。Therefore, increasingly finer primary particles are used for filler particles such as magnetic powder, but as the primary particles become finer, they tend to form aggregates as secondary particles due to factors such as their surface activity and affinity with the dispersion medium. Fillers such as carbon black, which are added for the purpose of improving light-shielding properties and conductivity, also cause problems such as dropouts due to their agglomerates.
Powder falling off due to insufficient particle retention of the binder,
Because the surface is too rough, the tape running member of the deck is worn out and the magnetic head is damaged, causing functional problems. For example, when a bank coat layer such as the alumina particles described in Japanese Patent Publication No. 50-3927 comes into contact with a guide pin etc., especially when the guide pin etc. is an organic resin member, this pin etc. will be scraped and the This impairs the function of the guide pin that guides the magnetic tape smoothly.
これらの原因の一つは、フィラー特に無機質粉末は一般
に粒子形状が多種多様で一定でなく、且つその粒径の分
布も広いことにより磁気テープ構成層の表面が必要以上
に粗面化することによる。One of these causes is that fillers, especially inorganic powders, generally have a wide variety of particle shapes and are not constant, and their particle size distribution is also wide, which causes the surface of the magnetic tape's constituent layers to become rougher than necessary. .
このことから、例えばバックコート層（ＢＣ層）の表面
粗さは、表面凹凸の中心線の平均粗さく Ｒａ ）を０
．Ｏ１〜０．１１１ｍ、また最大粗さく Ｒｍａｘ ）
を０．２０〜０．８０μｍとするのがよいと言われてい
る。Ｒａ又はＲｍａｘの値が小さすぎると走行安定性、
テープ巻回時の巻き姿が不安定となり、また大きすぎる
とＢＣ層から磁性層へ転着（テープ巻回時）が生じて表
面が更に荒れる欠点がある。From this, for example, the surface roughness of the back coat layer (BC layer) can be determined by setting the average roughness of the center line of the surface irregularities (Ra) to 0.
．． O1~0.111m, maximum roughness Rmax)
It is said that it is best to set the thickness to 0.20 to 0.80 μm. If the value of Ra or Rmax is too small, the running stability
When the tape is wound, the winding shape becomes unstable, and if it is too large, transfer occurs from the BC layer to the magnetic layer (during the tape winding), resulting in further roughening of the surface.
前記したように磁気テープの走行性、耐摩耗性の向上を
狙った滑面性と、磁気ヘッドの傷損を防止し、且つ良好
なりリーニング効果を生ずる研磨性を同時に高めるには
、フィラー粒子に関し前記した各観点からの検討が必要
であり、更に生産性の面からフィラー粒子の沈降に関る
比重等の物性についての考慮も加えるべきであり、この
ような多（の問題を顕在的に或は潜在的に含んでいるフ
ィラー粒子の選択が先決して求められる。As mentioned above, in order to simultaneously improve the smoothness, which aims to improve the running performance and wear resistance of the magnetic tape, and the abrasiveness, which prevents damage to the magnetic head and produces a good leaning effect, it is necessary to use filler particles. It is necessary to consider each of the above-mentioned viewpoints, and from the viewpoint of productivity, consideration should also be given to physical properties such as specific gravity related to sedimentation of filler particles. The selection of potentially containing filler particles is required in advance.
（３）発明の目的
本発明の目的は耐久性、走行性が良好で且つヘッド摩耗
が少なく而もヘッドクリーニング性がよく、またＳ／Ｎ
比が高くドロップアウトの少ない記録媒体を提供するこ
とにある。(3) Purpose of the Invention The purpose of the present invention is to provide a product with good durability and runnability, little head wear, good head cleaning performance, and S/N.
The object of the present invention is to provide a recording medium with a high ratio and low dropout.
（４）発明の構成及びその作用効果
前記した本発明の目的は、支持体上に磁気記録の用に供
する構成層を有する磁気記録媒体に於て、該層中に酸化
セリウムを含有することを特徴とする磁気記録媒体によ
って達成される。(4) Structure of the invention and its effects The object of the invention described above is to provide a magnetic recording medium having a constituent layer for magnetic recording on a support, in which cerium oxide is contained in the layer. This is achieved by a magnetic recording medium with special characteristics.
尚本発明の態様として、本発明に係る酸化セリウムは前
記構成層の内、磁性層に必須的に含まれることが好まし
い。As an aspect of the present invention, it is preferable that the cerium oxide according to the present invention is essentially included in the magnetic layer among the constituent layers.
また本発明に係る酸化セリウム（ＣｅＯ２）は平均粒径
が好ましくは０．０１〜２μｍ、更に好ましくは０．０
５〜１μｍである。添加量は磁性粉に対して好ましくは
０．０５〜２０ ｗｔ％、より好ましくは０．１０〜ｌ
Ｑｗｔ％であり、構成層に於る添加面密度としては２〜
７００ｍ９／ｙｉ”、好ましくは４〜３５０ｍｇ／ｌｉ
である。Further, the average particle size of cerium oxide (CeO2) according to the present invention is preferably 0.01 to 2 μm, more preferably 0.0 μm.
It is 5 to 1 μm. The amount added is preferably 0.05 to 20 wt%, more preferably 0.10 to 1, based on the magnetic powder.
Qwt%, and the additive surface density in the constituent layers is 2~
700m9/yi”, preferably 4-350mg/li
It is.
本発明に係るＣｅＯ２はその一般的製法によっても粒径
分布の狭い所謂単分散性の粒子かえられるので、ＣｅＯ
□を添加した層は、ＣｅＯ２粒子の突起によ゛つて作ら
れる摺擦支点は緻密に分布し且つ該支点を連ねて含む面
は甚だ平坦、平滑となる。The CeO2 according to the present invention can be changed to so-called monodisperse particles with a narrow particle size distribution even by its general manufacturing method.
In the layer to which □ is added, the sliding fulcrums formed by the protrusions of the CeO2 particles are densely distributed, and the surface containing the fulcrums is extremely flat and smooth.
即ち、構成層表面の中心線平均粗さＲａを０．０２５μ
ｍ以下ならしめることができる。That is, the center line average roughness Ra of the surface of the constituent layers is set to 0.025μ.
m or less.
尚該平均粗さＲａは好ましくは０．０１〜０．０２５μ
ｍであり、また最大粗さＲｍａｘは０．２０〜０．３０
μｍである。The average roughness Ra is preferably 0.01 to 0.025μ.
m, and the maximum roughness Rmax is 0.20 to 0.30
It is μm.
前記のように本発明に係るＣｅＯ２を含有する磁気テー
プの表面は充分な滑面性を有し粉落ちもなくバックコー
ト層の粗さが磁性層に転写されることもない。更に磁気
ヘッド等を傷損することなく且つクリーニング効果も充
分であって良好な記録転収を示し且つ長期使用に耐えて
性能を保持することができる。As mentioned above, the surface of the CeO2-containing magnetic tape according to the present invention has sufficient smoothness, and there is no powder falling and the roughness of the back coat layer is not transferred to the magnetic layer. Furthermore, the magnetic head and the like are not damaged, the cleaning effect is sufficient, the recording yield is good, and the performance can be maintained over long periods of use.
また本発明に係るＣ ｅ ０２は自然界に於て、ランタ
ン、ネオジム及びプラセオジムと一緒に産出され、Ｌａ
２Ｏ３及びその他の希土類酸化物はＣｅＯ２と同じく１
μｍ以下の単分散性の、且つ硬度も充分な粒子を与える
ので、前記希土類酸化物は殊更にＣｅ ０２粒子と分離
することなく混在のま＼本発明に用いることができる。Furthermore, C e 02 according to the present invention is produced together with lanthanum, neodymium, and praseodymium in the natural world, and La
2O3 and other rare earth oxides are 1 like CeO2.
The rare earth oxide can be used in the present invention as a mixture without being separated from the Ce 02 particles, since it provides particles that are monodisperse in size of μm or less and have sufficient hardness.
また本発明でいう前記平均粒径とは頻度分布曲線に於て
頻度累積が関％になる点の粒径で定義されたものである
。Further, the average particle size as used in the present invention is defined as the particle size at the point on the frequency distribution curve where the cumulative frequency becomes a percentage.
更に前記表面平均粗さＲａは、表面粗さ曲線に於る中心
線平均粗さを意味し、触針法によってえられたμｍ単位
の値である。また表面粗さの最大高さＲｍａｘを用いる
ことがある。Furthermore, the surface average roughness Ra means the center line average roughness in the surface roughness curve, and is a value in μm obtained by the stylus method. Further, the maximum height Rmax of surface roughness may be used.
また本発明に係るＣｅＯ２を適用する構成層としては、
磁性層、バックコート層或はそれらに対するオーバーコ
ート層が挙げられる。Furthermore, the constituent layers to which CeO2 according to the present invention is applied include:
Examples include a magnetic layer, a back coat layer, and an overcoat layer therefor.
本発明の磁気記録媒体の磁性層の磁性材料としては、例
えばｒ−Ｆｅ２０３、Ｃｏ含有ｒ −Ｆｅ２０３ 、Ｃ
ｏ被着ｒ−Ｆｅ２Ｏ３、Ｆｅ３Ｏ４、Ｃｏ含有Ｆｅ３Ｏ
４、Ｃｏ被着Ｆｓ３０４ 、ＣｒＯ２等の酸化物磁性体
、例えばＦｅ、Ｎｉ、Ｃｏ 、 Ｆｅ−Ｎｉ合金、Ｆｅ
−Ｃｏ合金、Ｆｅ −Ｎｉ−Ｐ合金、Ｆｅ −Ｎｉ−Ｃ
ｏ合金、Ｆｅ−Ｍｎ−Ｚｎ合金、Ｆｅ −Ｎｉ−Ｚｎ合
金、Ｆｅ −Ｃｏ −Ｎｉ−Ｃｒ合金、Ｆｅ −Ｃｏ
−Ｎｉ−Ｐ合金、Ｃｏ−Ｎｉ合金、Ｃｏ−Ｐ合金、Ｃｏ
−Ｃｒ合金等Ｆｅ、 Ｎｉ、 Ｃｏを主成分とするメタ
ル磁性粉等各種の強磁性体が挙げられる。これらの金属
磁性体に対する添加物としてはＳｉ、 Ｃｕ、 Ｚｎ、
ｋｇ、 Ｐ％Ｍｎ５Ｃｒ等の元素又はこれらの化合物
が含まれていても良い。またバリウムフェライト等の六
方晶系フェライト、窒化鉄も使用される。Examples of magnetic materials for the magnetic layer of the magnetic recording medium of the present invention include r-Fe203, Co-containing r-Fe203, C
o Deposition r-Fe2O3, Fe3O4, Co-containing Fe3O
4. Co-coated Fs304, oxide magnetic materials such as CrO2, e.g. Fe, Ni, Co, Fe-Ni alloy, Fe
-Co alloy, Fe-Ni-P alloy, Fe-Ni-C
o alloy, Fe-Mn-Zn alloy, Fe-Ni-Zn alloy, Fe-Co-Ni-Cr alloy, Fe-Co
-Ni-P alloy, Co-Ni alloy, Co-P alloy, Co
Examples include various ferromagnetic materials such as metal magnetic powders containing Fe, Ni, and Co as main components, such as -Cr alloys. Additives to these metal magnetic materials include Si, Cu, Zn,
kg, P%Mn5Cr, or a compound thereof may be included. Hexagonal ferrite such as barium ferrite and iron nitride are also used.
本発明に係る構成層に用いられるバインダーとしては、
耐摩耗性のあるポリウレタンが挙ケられる１、これは、
他の物質に対する接着力が強く、反復して加わる応力ま
たは屈曲に耐えて機械的に強靭であり、且つ耐摩耗性、
耐候性が良好である。The binder used in the constituent layers according to the present invention includes:
Examples include wear-resistant polyurethane1, which is
It has strong adhesion to other substances, is mechanically strong by being able to withstand repeated stress or bending, and has abrasion resistance.
Good weather resistance.
またポリウレタンの他に、繊維素系樹脂及び塩化ビニル
系共重合体も含有せしめれば、磁性層中の磁性粉の分散
性が向上してその機械的強度が増大する。但し繊維素系
樹脂及び塩化ビニル系共重合体のみでは層が硬くなりす
ぎるが、これは上述のポリウレタンの含有によって防止
できる。Furthermore, if a cellulose resin and a vinyl chloride copolymer are also contained in addition to polyurethane, the dispersibility of the magnetic powder in the magnetic layer will be improved and its mechanical strength will be increased. However, if only the cellulose resin and the vinyl chloride copolymer are used, the layer becomes too hard, but this can be prevented by containing the above-mentioned polyurethane.
使用可能な繊維素系樹脂には、セルロースエーテル、セ
ルロース無機酸エステル、セルロース有機酸エステル等
が使用できる。上記の塩化ビニル系共重合体は、部分的
に加水分解されていてもよい。塩化ビニル系共重合体と
して、好ましくは、塩化ビニル−酢酸ビニルを含んだ共
重合体が挙げられる。Usable cellulose resins include cellulose ether, cellulose inorganic acid ester, cellulose organic acid ester, and the like. The vinyl chloride copolymer described above may be partially hydrolyzed. Preferable examples of the vinyl chloride copolymer include copolymers containing vinyl chloride and vinyl acetate.
またフェノキシ樹脂も使用することができる。Phenoxy resins can also be used.
フェノキシ樹脂は機械的強度が大きく、寸度安定性にす
ぐれ、耐熱、耐水、耐薬品性がよく、接着性がよい等の
長所を有する。Phenoxy resin has advantages such as high mechanical strength, excellent dimensional stability, good heat resistance, water resistance, chemical resistance, and good adhesiveness.
これらの長所は前記したポリウレタンと長短相補い更に
相助けてテープ物性に於て経時安定性を著しく高めるこ
とができる。These advantages are complementary to the above-mentioned polyurethane, and also help to significantly improve the stability over time in the physical properties of the tape.
更釦前記したバインダーの他、熱可塑性樹脂、熱硬化性
樹脂、反応型樹脂、電子線照射硬化型樹脂との混合物が
使用されてもよいっ
本発明の磁気テープの磁性層の耐久性を向上させるため
に磁性塗料に各種硬化剤を含有させることができ、例え
ばイソシアネートを含有させることができる。In addition to the above-mentioned binders, mixtures of thermoplastic resins, thermosetting resins, reactive resins, and electron beam curable resins may be used to improve the durability of the magnetic layer of the magnetic tape of the present invention. In order to achieve this, the magnetic paint can contain various hardening agents, such as isocyanate.
使用できる芳香族インシアネートは、例えばトリレンジ
イソシアネート（ＴＤＩ）等及びこれらイソシアネート
と活性水素化合物との付加体などがあり、平均分子量と
しては１００〜３，０００の範囲のものが好適である。Aromatic incyanates that can be used include, for example, tolylene diisocyanate (TDI) and adducts of these isocyanates and active hydrogen compounds, and those having an average molecular weight of 100 to 3,000 are preferred.
また脂肪族イソシアネートとしては、ヘキサメチレンジ
インシアネート（ＨＭＤＩ）等及びこれらイソシアネー
トと活性水素化合物の付加体等が挙げられる。これらの
脂肪族イソシアネート及びこれらインシアネートと活性
水素化合物の付加体などの中でも、好ましいのは分子量
が１００〜３，０００の範囲のものである。脂肪族イン
シアネートのなかでも非脂環式のイソシアネート及びこ
れら化合物と活性水素化合物の付加体が好ましい。Examples of aliphatic isocyanates include hexamethylene diinocyanate (HMDI) and adducts of these isocyanates and active hydrogen compounds. Among these aliphatic isocyanates and adducts of these incyanates and active hydrogen compounds, those having a molecular weight in the range of 100 to 3,000 are preferred. Among the aliphatic incyanates, non-alicyclic isocyanates and adducts of these compounds with active hydrogen compounds are preferred.
上記磁性層を形成するのに使用される磁性塗料には必要
に応じて分散剤、滑面剤、本発明に係るＣ ｅ ０２以
外の研磨剤及びマット剤、更に帯電防止剤等の添加剤を
含有させてもよい０
分散剤としては、レシチン、リン酸エステル、アミン化
合物、アルキルサルフェート、脂肪酸アミド、高級アル
コール、ポリエチレンオキサイド、スルホコハク酸、ス
ルホコハク酸エステル、公知の界面活性剤等及びこれら
の塩があり、また、陰性有機基（例えば−ＣＯＯＨｌ−
ＰＯ８Ｈ）を有する重合体分散剤の塩を使用することも
出来る。これら分散剤は１種類のみで用いても、或は２
種類以上を併用してもよい。これらの分散剤はバインダ
ー１００］ｉ量部に対し１〜２０重量部の範囲で添加さ
れる。これらの分散剤は、あらかじめ磁性粉を前処理す
る為に用いてもよい。The magnetic paint used to form the magnetic layer may contain additives such as a dispersant, a lubricant, an abrasive and a matting agent other than C e 02 according to the present invention, and an antistatic agent, as necessary. 0 Dispersants that may be included include lecithin, phosphoric acid esters, amine compounds, alkyl sulfates, fatty acid amides, higher alcohols, polyethylene oxides, sulfosuccinic acids, sulfosuccinic acid esters, known surfactants, and salts thereof. Yes, and also negative organic groups (e.g. -COOHl-
It is also possible to use salts of polymeric dispersants with PO8H). These dispersants can be used alone or in combination.
More than one type may be used in combination. These dispersants are added in an amount of 1 to 20 parts by weight based on 100 parts of the binder. These dispersants may be used to pre-treat the magnetic powder in advance.
また、滑面剤としては、シリコーンオイル、グラファイ
ト、カーボンブラックグラフトポリマー、二硫化モリブ
デン、二硫化タングステン、ラウリル酸、ミリスチン酸
、炭素原子数１２〜１６の一塩基性脂肪酸と該脂肪酸の
炭素原子数と合計して炭素原子数が２１−２３個の一価
のアルコールから成る脂肪酸エステル（いわゆるロウ）
等も使用できる。In addition, as lubricating agents, silicone oil, graphite, carbon black graft polymer, molybdenum disulfide, tungsten disulfide, lauric acid, myristic acid, monobasic fatty acids with 12 to 16 carbon atoms and carbon atoms of the fatty acids are used. and fatty acid esters (so-called waxes) consisting of monohydric alcohols with a total of 21 to 23 carbon atoms.
etc. can also be used.
これらの滑面剤はバインダー１００重量部に対して０．
２〜２０重量部の範囲で添加さγしる。These lubricants are used in an amount of 0.0% per 100 parts by weight of the binder.
It is added in an amount of 2 to 20 parts by weight.
また必要によって併用してもよい研磨剤としては、一般
に使用される材料で溶融アルミナ、炭化ケイ素、酸化ク
ロム、コランダム、人造コランダム、ダイヤモンド、人
造ダイヤモンド、ザクロ石、エメリー（主成分：コラン
ダムと磁鉄鉱）等が使用される。これらの研磨剤は平均
粒子径０．０５〜５μｍの大きさのものが使用され、特
に好ましくは０．１〜２１１ｍである。これらの研磨剤
はバインダー１００重量部に対して１〜２０重量部の範
囲で添加される。Abrasives that may be used in combination if necessary include commonly used materials such as fused alumina, silicon carbide, chromium oxide, corundum, artificial corundum, diamond, artificial diamond, garnet, and emery (main ingredients: corundum and magnetite). etc. are used. These abrasives have an average particle size of 0.05 to 5 μm, particularly preferably 0.1 to 211 m. These abrasives are added in an amount of 1 to 20 parts by weight based on 100 parts by weight of the binder.
また必要によってＣｅＯ２に併用されるマット剤として
は、有機質粉末或は無機質粉末を夫々に或は混合して用
いられる。Further, as a matting agent used in combination with CeO2 if necessary, organic powder or inorganic powder may be used individually or in combination.
前記有機質粉末としては、アクリ、ルスチレン系樹脂、
ベンゾグアナミン系樹脂粉末、メラ１ン系樹脂粉末、フ
タロシアニン系顔料が好ましいが、ポリオレフィン系樹
脂粉末、ポリエステル系樹脂粉末、ポリアミド系樹脂粉
末、ポリイミド系樹脂粉末、ポリフッ化エチレン樹脂粉
末等も使用でき、無機質粉末としては酸化珪素、酸化チ
タン、酸化アルミニウム、炭酸カルシウム、硫酸バリウ
ム、酸化亜鉛、酸化藝、酸化クロム、炭化珪素、炭化カ
ルシウム、α−Ｆｅ２０３ 、タルク、カオリン、硫酸
カルシウム、窒化硼素、弗化亜鉛、二酸化モリブデンが
挙げられる。The organic powder includes acrylic, rustyrene resin,
Benzoguanamine resin powder, melamine resin powder, and phthalocyanine pigments are preferred, but polyolefin resin powder, polyester resin powder, polyamide resin powder, polyimide resin powder, polyfluoroethylene resin powder, etc. can also be used. Powders include silicon oxide, titanium oxide, aluminum oxide, calcium carbonate, barium sulfate, zinc oxide, iron oxide, chromium oxide, silicon carbide, calcium carbide, α-Fe203, talc, kaolin, calcium sulfate, boron nitride, zinc fluoride. , molybdenum dioxide.
帯電防止剤としては、カーボンブラックをはじめ、グラ
ファイト、酸化スズ−酸化アンチモン系化合物、酸化チ
タン−酸化スズ−酸化アンチモン系化合物などの導電性
粉末；サポニンなどの天然界面活性剤；アルキレンオキ
サイド系、グリセリン系、グリシドール系などのノニオ
ン界面活性剤；高級アルキルアミン類、第４級アンモニ
ウム塩類、ピリジン、その他の複素環類、ホスホニウム
またはスルホニウム類などのカチオン界面活性剤；カル
ボン酸、スルホン酸、燐酸、硫酸工”ｆ）’基、燐酸エ
ステル基等の酸性基を含むアニオン界面活性剤；アミノ
酸類、アミノスルホン酸類、アミノアルコールの硫酸ま
たは燐酸エステル類等の両性活性剤などがあげられる。Antistatic agents include carbon black, graphite, conductive powders such as tin oxide-antimony oxide compounds, titanium oxide-tin oxide-antimony oxide compounds; natural surfactants such as saponin; alkylene oxides, and glycerin. Cationic surfactants such as higher alkylamines, quaternary ammonium salts, pyridine, other heterocycles, phosphoniums or sulfoniums; Carboxylic acids, sulfonic acids, phosphoric acids, sulfuric acids Examples include anionic surfactants containing acidic groups such as phosphoric acid groups and phosphoric acid ester groups; amphoteric surfactants such as amino acids, aminosulfonic acids, and sulfuric acid or phosphoric acid esters of amino alcohols.
前記構成層の塗料に配合される溶媒或はこの塗料の塗布
時の希釈溶媒としては、アセトン、メチルエチルケトン
、メチルイソブチルケトン、シクロヘキサノン等のケト
ン類；メタノール、エタノール、プロパツール、フタノ
ール等のアルコール類；酢酸メチル、酢酸エチル、酢酸
ブチル、乳酸エチル、エチレングリコールモノアセテー
ト等のエステル類；グリコールジメチルエーテル、グリ
コールモノエチルエーテル、ジオキサン、テトラヒドロ
フラン等のエーテル類；ベンゼン、トルエン、キシレン
等の芳香族炭化水素；メチレンクロライド、エチレンク
ロライド、四塩化炭素、クロロホルム、ジクロルベンゼ
ン等のハロゲンイし炭化水素等のものが使用できる。The solvents to be added to the paint of the constituent layer or the diluting solvent during application of the paint include ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone, and cyclohexanone; alcohols such as methanol, ethanol, propatool, and phthanol; Esters such as methyl acetate, ethyl acetate, butyl acetate, ethyl lactate, and ethylene glycol monoacetate; Ethers such as glycol dimethyl ether, glycol monoethyl ether, dioxane, and tetrahydrofuran; Aromatic hydrocarbons such as benzene, toluene, and xylene; Methylene Halogenated hydrocarbons such as chloride, ethylene chloride, carbon tetrachloride, chloroform, and dichlorobenzene can be used.
また、支持体としては、ポリエチ゛レンテレフタレート
、ポリエチレン−２，６−ナフタレート等のポリエステ
ル類、ポリプロピレン等のポリオレフィン類、セルロー
ストリアセテート、セルロースダイアセテート等のセル
ロース誘導体、ポリアミド、ポリカーボネートなどのプ
ラスチックが挙げられるが、Ｃｕ、 ＡＩ、Ｚｎ等の金
属、ガラス、ＢＮ、 Ｓｉカーバイド、磁器、陶器等の
セラミックなども使用できる〇
これらの支持体の厚みはフィルム、シート状の場合は約
３〜１００μｍ程度、好ましくは５〜５０μｍであり、
ディスク、カード状の場合はＩμｍ〜１゜龍程度であり
、ドラム状の場合は円筒状で用いられ、使用するレコー
ダに応じてその型は決められる。Examples of the support include polyesters such as polyethylene terephthalate and polyethylene-2,6-naphthalate, polyolefins such as polypropylene, cellulose derivatives such as cellulose triacetate and cellulose diacetate, and plastics such as polyamide and polycarbonate. However, metals such as Cu, AI, and Zn, glass, BN, Si carbide, ceramics such as porcelain, and ceramics can also be used. The thickness of these supports is preferably about 3 to 100 μm when in the form of a film or sheet. is 5 to 50 μm,
In the case of a disk or card, the diameter is about 1 μm to 1°, and in the case of a drum, the shape is cylindrical, and the shape is determined depending on the recorder used.
上記支持体と磁性層の中間には構成層の１つとして接着
性を向上させる中間層を設けても良い。An intermediate layer for improving adhesion may be provided as one of the constituent layers between the support and the magnetic layer.
支持体上に上記構成層を形成するための塗布方法として
は、エアードクターコート、ブレードコート、エアーナ
イフコート、スクイズコート、含浸コート、リバースロ
ールコート、トランスファーロールコート、クラビアコ
ート、キスコート、キャストコート、スプＶイコート等
が利用できるがこれらに限らない。Coating methods for forming the above-mentioned constituent layers on the support include air doctor coating, blade coating, air knife coating, squeeze coating, impregnation coating, reverse roll coating, transfer roll coating, clavia coating, kiss coating, cast coating, Sp-V Icoat and the like can be used, but are not limited to these.
（実施例） 本発明を実施例を用いて具体的に説明する。(Example) The present invention will be specifically explained using examples.
実施例−１ 下記処方の磁性塗料に拠って実施試料を作成した。Example-1 Experimental samples were prepared using magnetic paints with the following formulations.
Ｃｏ −ｒ −Ｆｅ２０３
１００重量部カーボンブラック
５重量部レシチン（分散剤）
３重量部ＣａＯ２（平均粒径０．１μｍ）
１重量部パルミチン酸
２を置部ステアリン酸ブチル １
重量部シクロヘキサノン １５０：
ｉ置部メチルエチルケトン ７０ｆＥ
ｔ部トルエン ３ｏ
１ｊＬ量部上記成分をボールミルに仕込み分散させた後
、この塗料に３官能イソシアネ一ト５部を添加し、リバ
ースロールコータ−にて支持体上に５μｍ厚みに塗布し
てスーパーカレンダーをかけ、１／２インチ幅にスリッ
トしてとデオテープとした。Co-r-Fe203
100 parts by weight carbon black
5 parts by weight lecithin (dispersant)
3 parts by weight CaO2 (average particle size 0.1 μm)
1 part by weight palmitic acid
Butyl stearate 1
Part by weight cyclohexanone 150:
Methyl ethyl ketone 70fE
t part toluene 3o
After dispersing the above components in a ball mill, 5 parts of a trifunctional isocyanate was added to the paint, and the coating was applied to a thickness of 5 μm on a support using a reverse roll coater and supercalendered. /2 inch width was slit and used as deo tape.
実施例−２
実施例−１においてＣｅＯ□の平均粒径を０，８μｍ添
加量を９重量部に代えた以外は実施例−１と同様の操作
を行なった◎
実施例−３
実施例−１において、Ｃｏ −ｒ−Ｆｅ２０３をＦｅ系
メタル磁性粉に代えた以外は実施例−１と同様の操作を
行なった。Example-2 The same operation as in Example-1 was performed except that the average particle diameter of CeO□ in Example-1 was changed to 0.8 μm and the amount added was changed to 9 parts by weight. Example-3 Example-1 The same operation as in Example 1 was performed except that Co-r-Fe203 was replaced with Fe-based metal magnetic powder.
実施例−４
実施例−３に８いてＣｅＯ２の平均粒径を０．５μｍ添
加量を６重量部に代えた以外は実施例−３と同様の操作
を行なった。Example 4 The same operation as in Example 3 was performed except that the average particle diameter of CeO2 was changed to 0.5 μm and the amount added was changed to 6 parts by weight.
比較例−１
実施例−１においてＣｅＯ２を平均粒径０．１μｍのア
ルミナに代えた以外は実施例−１と同様の操作を行なっ
た。Comparative Example-1 The same operation as in Example-1 was performed except that CeO2 in Example-1 was replaced with alumina having an average particle size of 0.1 μm.
比較例−２
実施例−４においてＣｅＯ２を平均粒径０．５μｍのア
ルミナに代えた以外は実施例−４と同様の操作を行なっ
た。Comparative Example-2 The same operation as in Example-4 was performed except that CeO2 in Example-4 was replaced with alumina having an average particle size of 0.5 μm.
一＼、
以工余占
＼＜−、−″
ＲＦ出力低下：ビデオデツキにて４０℃（資）％で１０
０時間走行させたときの初期からのＲＦ比出
力低下を示した。1＼、Iworking surplus＼＜-,-″ RF output decrease: 10% at 40℃ (capital)% on video deck
The RF specific output decreased from the initial stage when the vehicle was run for 0 hours.
ヘッド摩耗：ビデオデツキにて４０℃（資）％で１００
時間走行させたときの初期からのヘッドの
つき出し部分の高さの変化を示した。Head wear: 100% at 40℃ (capital) on video deck
It shows the change in the height of the protruding part of the head from the initial stage when running for hours.
表から明かなように本発明に於てＲＦ出力低下が甚だ少
く、また磁気ヘッドの傷損は比較に比べ著しく少い。As is clear from the table, in the present invention, the decrease in RF output is extremely small, and the damage to the magnetic head is significantly less than in comparison.
Claims (1)
録媒体に於て、該層中に酸化セリウムを含有することを
特徴とする磁気記録媒体。A magnetic recording medium having a constituent layer for magnetic recording on a support, characterized in that the layer contains cerium oxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61030190A JPS62188022A (en) | 1986-02-13 | 1986-02-13 | Magnetic recording medium containing cerium oxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61030190A JPS62188022A (en) | 1986-02-13 | 1986-02-13 | Magnetic recording medium containing cerium oxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62188022A true JPS62188022A (en) | 1987-08-17 |
Family
ID=12296833
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61030190A Pending JPS62188022A (en) | 1986-02-13 | 1986-02-13 | Magnetic recording medium containing cerium oxide |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62188022A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59217226A (en) * | 1983-05-25 | 1984-12-07 | Konishiroku Photo Ind Co Ltd | Magnetic recording medium |
-
1986
- 1986-02-13 JP JP61030190A patent/JPS62188022A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59217226A (en) * | 1983-05-25 | 1984-12-07 | Konishiroku Photo Ind Co Ltd | Magnetic recording medium |
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