JPH0480521B2 - - Google Patents
Info
- Publication number
- JPH0480521B2 JPH0480521B2 JP56070679A JP7067981A JPH0480521B2 JP H0480521 B2 JPH0480521 B2 JP H0480521B2 JP 56070679 A JP56070679 A JP 56070679A JP 7067981 A JP7067981 A JP 7067981A JP H0480521 B2 JPH0480521 B2 JP H0480521B2
- Authority
- JP
- Japan
- Prior art keywords
- groups
- group
- coupling agent
- silane coupling
- epoxy
- 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.)
- Expired - Lifetime
Links
- 230000005291 magnetic effect Effects 0.000 claims description 20
- 150000001875 compounds Chemical class 0.000 claims description 18
- 125000003700 epoxy group Chemical group 0.000 claims description 13
- 239000000696 magnetic material Substances 0.000 claims description 12
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 9
- 230000005294 ferromagnetic effect Effects 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 8
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 7
- 125000003277 amino group Chemical group 0.000 claims description 6
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 6
- 125000003368 amide group Chemical group 0.000 claims description 5
- 125000000524 functional group Chemical group 0.000 claims description 5
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 claims description 5
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000002335 surface treatment layer Substances 0.000 claims 5
- 239000010410 layer Substances 0.000 claims 2
- 229910000859 α-Fe Inorganic materials 0.000 claims 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical group Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims 1
- 150000001735 carboxylic acids Chemical group 0.000 claims 1
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 10
- 239000006247 magnetic powder Substances 0.000 description 9
- 229920005989 resin Polymers 0.000 description 7
- 239000011347 resin Substances 0.000 description 7
- -1 α-aminomethylaminododecyl Chemical group 0.000 description 7
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 239000006185 dispersion Substances 0.000 description 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 4
- 229910001566 austenite Inorganic materials 0.000 description 4
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 239000012948 isocyanate Substances 0.000 description 3
- 150000002576 ketones Chemical class 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 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 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- OYHQOLUKZRVURQ-NTGFUMLPSA-N (9Z,12Z)-9,10,12,13-tetratritiooctadeca-9,12-dienoic acid Chemical compound C(CCCCCCC\C(=C(/C\C(=C(/CCCCC)\[3H])\[3H])\[3H])\[3H])(=O)O OYHQOLUKZRVURQ-NTGFUMLPSA-N 0.000 description 2
- SAIKULLUBZKPDA-UHFFFAOYSA-N Bis(2-ethylhexyl) amine Chemical compound CCCCC(CC)CNCC(CC)CCCC SAIKULLUBZKPDA-UHFFFAOYSA-N 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- WGQKYBSKWIADBV-UHFFFAOYSA-N benzylamine Chemical compound NCC1=CC=CC=C1 WGQKYBSKWIADBV-UHFFFAOYSA-N 0.000 description 2
- DMVOXQPQNTYEKQ-UHFFFAOYSA-N biphenyl-4-amine Chemical group C1=CC(N)=CC=C1C1=CC=CC=C1 DMVOXQPQNTYEKQ-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- JXTHNDFMNIQAHM-UHFFFAOYSA-N dichloroacetic acid Chemical compound OC(=O)C(Cl)Cl JXTHNDFMNIQAHM-UHFFFAOYSA-N 0.000 description 2
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000000806 elastomer Substances 0.000 description 2
- XMHIUKTWLZUKEX-UHFFFAOYSA-N hexacosanoic acid Chemical compound CCCCCCCCCCCCCCCCCCCCCCCCCC(O)=O XMHIUKTWLZUKEX-UHFFFAOYSA-N 0.000 description 2
- IPCSVZSSVZVIGE-UHFFFAOYSA-N hexadecanoic acid Chemical compound CCCCCCCCCCCCCCCC(O)=O IPCSVZSSVZVIGE-UHFFFAOYSA-N 0.000 description 2
- VKOBVWXKNCXXDE-UHFFFAOYSA-N icosanoic acid Chemical compound CCCCCCCCCCCCCCCCCCCC(O)=O VKOBVWXKNCXXDE-UHFFFAOYSA-N 0.000 description 2
- MLFHJEHSLIIPHL-UHFFFAOYSA-N isoamyl acetate Chemical compound CC(C)CCOC(C)=O MLFHJEHSLIIPHL-UHFFFAOYSA-N 0.000 description 2
- 239000012046 mixed solvent Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 description 2
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 1
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 1
- KHUFHLFHOQVFGB-UHFFFAOYSA-N 1-aminoanthracene-9,10-dione Chemical compound O=C1C2=CC=CC=C2C(=O)C2=C1C=CC=C2N KHUFHLFHOQVFGB-UHFFFAOYSA-N 0.000 description 1
- QWDQYHPOSSHSAW-UHFFFAOYSA-N 1-isocyanatooctadecane Chemical compound CCCCCCCCCCCCCCCCCCN=C=O QWDQYHPOSSHSAW-UHFFFAOYSA-N 0.000 description 1
- RUFPHBVGCFYCNW-UHFFFAOYSA-N 1-naphthylamine Chemical compound C1=CC=C2C(N)=CC=CC2=C1 RUFPHBVGCFYCNW-UHFFFAOYSA-N 0.000 description 1
- 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 1
- QAOJBHRZQQDFHA-UHFFFAOYSA-N 2,3-dichlorobenzoic acid Chemical compound OC(=O)C1=CC=CC(Cl)=C1Cl QAOJBHRZQQDFHA-UHFFFAOYSA-N 0.000 description 1
- UMPSXRYVXUPCOS-UHFFFAOYSA-N 2,3-dichlorophenol Chemical compound OC1=CC=CC(Cl)=C1Cl UMPSXRYVXUPCOS-UHFFFAOYSA-N 0.000 description 1
- QWBBPBRQALCEIZ-UHFFFAOYSA-N 2,3-dimethylphenol Chemical compound CC1=CC=CC(O)=C1C QWBBPBRQALCEIZ-UHFFFAOYSA-N 0.000 description 1
- ZNQVEEAIQZEUHB-UHFFFAOYSA-N 2-ethoxyethanol Chemical compound CCOCCO ZNQVEEAIQZEUHB-UHFFFAOYSA-N 0.000 description 1
- LTHNHFOGQMKPOV-UHFFFAOYSA-N 2-ethylhexan-1-amine Chemical compound CCCCC(CC)CN LTHNHFOGQMKPOV-UHFFFAOYSA-N 0.000 description 1
- NJBCRXCAPCODGX-UHFFFAOYSA-N 2-methyl-n-(2-methylpropyl)propan-1-amine Chemical compound CC(C)CNCC(C)C NJBCRXCAPCODGX-UHFFFAOYSA-N 0.000 description 1
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 1
- DVFGEIYOLIFSRX-UHFFFAOYSA-N 3-(2-ethylhexoxy)propan-1-amine Chemical compound CCCCC(CC)COCCCN DVFGEIYOLIFSRX-UHFFFAOYSA-N 0.000 description 1
- LPUBRQWGZPPVBS-UHFFFAOYSA-N 3-butoxypropan-1-amine Chemical compound CCCCOCCCN LPUBRQWGZPPVBS-UHFFFAOYSA-N 0.000 description 1
- SOYBEXQHNURCGE-UHFFFAOYSA-N 3-ethoxypropan-1-amine Chemical compound CCOCCCN SOYBEXQHNURCGE-UHFFFAOYSA-N 0.000 description 1
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 description 1
- AOVLLANFDLLOPD-UHFFFAOYSA-N 4-[(benzyldiazenyl)methyl]aniline Chemical compound NC1=CC=C(CN=NCC2=CC=CC=C2)C=C1 AOVLLANFDLLOPD-UHFFFAOYSA-N 0.000 description 1
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 1
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- BWLUMTFWVZZZND-UHFFFAOYSA-N Dibenzylamine Chemical compound C=1C=CC=CC=1CNCC1=CC=CC=C1 BWLUMTFWVZZZND-UHFFFAOYSA-N 0.000 description 1
- IMROMDMJAWUWLK-UHFFFAOYSA-N Ethenol Chemical compound OC=C IMROMDMJAWUWLK-UHFFFAOYSA-N 0.000 description 1
- 229910017061 Fe Co Inorganic materials 0.000 description 1
- 239000005639 Lauric acid Substances 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 description 1
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 239000005642 Oleic acid Substances 0.000 description 1
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 1
- 235000021314 Palmitic acid Nutrition 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 229920006311 Urethane elastomer Polymers 0.000 description 1
- 229920002433 Vinyl chloride-vinyl acetate copolymer Polymers 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 239000003125 aqueous solvent Substances 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 230000001588 bifunctional effect Effects 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- HGAZMNJKRQFZKS-UHFFFAOYSA-N chloroethene;ethenyl acetate Chemical compound ClC=C.CC(=O)OC=C HGAZMNJKRQFZKS-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000010908 decantation Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 229960005215 dichloroacetic acid Drugs 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 150000008282 halocarbons Chemical class 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 229940117955 isoamyl acetate Drugs 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 1
- 239000000787 lecithin Substances 0.000 description 1
- 229940067606 lecithin Drugs 0.000 description 1
- 235000010445 lecithin Nutrition 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000006082 mold release agent Substances 0.000 description 1
- KYCGURZGBKFEQB-UHFFFAOYSA-N n',n'-dibutylpropane-1,3-diamine Chemical compound CCCCN(CCCC)CCCN KYCGURZGBKFEQB-UHFFFAOYSA-N 0.000 description 1
- QOHMWDJIBGVPIF-UHFFFAOYSA-N n',n'-diethylpropane-1,3-diamine Chemical compound CCN(CC)CCCN QOHMWDJIBGVPIF-UHFFFAOYSA-N 0.000 description 1
- WQEPLUUGTLDZJY-UHFFFAOYSA-N n-Pentadecanoic acid Natural products CCCCCCCCCCCCCCC(O)=O WQEPLUUGTLDZJY-UHFFFAOYSA-N 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- ZWLPBLYKEWSWPD-UHFFFAOYSA-N o-toluic acid Chemical compound CC1=CC=CC=C1C(O)=O ZWLPBLYKEWSWPD-UHFFFAOYSA-N 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 1
- 235000021313 oleic acid Nutrition 0.000 description 1
- 239000013034 phenoxy resin Substances 0.000 description 1
- 229920006287 phenoxy resin Polymers 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 229910052715 tantalum Inorganic materials 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
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 125000003944 tolyl group Chemical group 0.000 description 1
- DQZNLOXENNXVAD-UHFFFAOYSA-N trimethoxy-[2-(7-oxabicyclo[4.1.0]heptan-4-yl)ethyl]silane Chemical compound C1C(CC[Si](OC)(OC)OC)CCC2OC21 DQZNLOXENNXVAD-UHFFFAOYSA-N 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- 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
- G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
- G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
- G11B5/712—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the surface treatment or coating of magnetic particles
Description
本発明は、特に高密度記録に適した磁性体およ
び磁気記録媒体、並びに磁性体の製造方法に関す
る。
ビデオ用、コンピユータ用、オーデイオ用等の
磁気記録媒体の製造において利用される磁性粉は
磁気記録媒体のノイズレベルの低減、高密度記録
の達成を目ざして、粒径を小さくし、分散性、分
散安定性に優れたものが要請されるようになつて
きた。
しかし、磁性粉は小粒径するに伴つて、凝集性
が高まり、塗料化に際して分散が困難になるばか
りでなく、分散安定性も低下してくることが知ら
れている。
本願は上記事情に鑑みて、分散性、分散安定性
に優れた強磁性体を提供し、且つ該磁性体を用い
てノイズレベルが低く、高密度記録に適した磁気
記録媒体を提供せんとするものである。
すなわち本発明は、エポキシ基を有するシラン
カツプリング剤で強磁性粉表面を被覆し、さらに
エポキシ基に対して反応活性な官能基を１〜３個
隣接して有する分子量100以上の化合物で処理し
てエポキシ基と結合させて得られる磁性体および
これを含有する非水系塗料を支持体上に塗布して
製造される磁気記録媒体に関するものであり、こ
のような磁性粉の表面処理を採用することにより
上記効果を達成するものである。
本発明において用いられる強磁性粉には、γ−
Fe2O3，Co.処理γ−Fe2O3，Fe3O4，γ−Fe2O3
の還元体，Fe−Co，Co−Cr，BaO.n（Fe1−
lM1）2O3（ｎ＝5.4〜6.0，ｌ＝０〜0.2，Ｍ＝Ti，
Co，Zn，Ｖ，Nb，Sb，Ta等）等があるが、特
にここに記載したものに拘わらない。
また、エポキシ基を有するシランカツプリング
剤とはβ―（3.4−エポキシシクロヘキシル）エ
チル・トリメトキシシラン，γ―グリシドキシプ
ロピルトリメトキシシラン等である。該シランカ
ツプリング剤で磁性粉の表面を被覆するに際し
て、一般的にはアルコール・水混合溶媒（PH＜
４）に磁性粉を懸濁して実施するが、アルコー
ル、ケトン等の非水溶媒中で実施してもよい。
更にアミノ基、アミド基、カルボキシル基、カ
ルボン酸クロライド基、ヒドロキシル基、イソシ
アナート基などのエポキシ基に対して反応活性を
有する官能基を少くとも一種類、一個以上三個以
下を隣接して有する分子量100以上の化合物とし
ては、下記のものがある。
アミノ基を有する化合物；ジイソブチルアミ
ン、２−エチルヘキシルアミン、ジ―２―エチル
ヘキシルアミン、ベンジルアミン、ジベンジルア
ミン、Ｎ−アミノプロピル―２−ピペコリン、３
−エトキシプロピルアミン、２−エチルヘキシル
オキシプロピルアミン、ジエチルアミノプロピル
アミン、ジブチルアミノプロピルアミン、ｎ−ブ
トキシプロピルアミン、４−アミノビフエニル、
アミノナフタレン、アミノテドラセン、α―アミ
ノメチルアミノドデシル、ｐ−アミノアゾトルエ
ン、アミノアントラキノン、等。
カルボキシル基を有する化合物；リノール酸、
リノレイン酸、オレイン酸、ステアリン酸、ラウ
リン酸、パルミチン酸、アラキン酸、ミリスチン
酸、ジクロル酢酸、セロチン酸、トルイル酸、ジ
クロル安息香酸、等。
アミド基、カルボン酸クロライド基を有する化
合物；カルボキシル基を有する化合物の誘導体。
ヒドロキシル基を有する化合物；ポリオキシエ
チレンノニルフエニルエーテル、ポリオキシエチ
レンドデシルエーテル、ジメチルフエノール、ジ
クロルフエノール、オキシナフトキノン、オキシ
メチルキノリン、２，３，−ジオキシナフトキノ
ン、チトラデカノール、テルピネオールドデカノ
ール。
イソシアナート基を有する化合物；ステアリル
イソシアナート、オレイルイソシアナート、ポリ
オキシエチレンノニルフエニルエーテルとトリレ
ンジイソシアナートとの１：１縮合体、等、アミ
ノ基を有する化合物、カルボキシル基を有する化
合物、ヒドロキシル基を有する化合物等とトリレ
ンジイソシアナート、４，4´−メチレンビスフエ
ニルイソシアナート等、２官能イソシアナート化
合物との１：１縮合体。等がある。
これらを磁性粉表面に被覆したエポキシ基と上
記化合物群のいずれかと反応させるに際しては炭
化水素系、ハロゲン化炭化水素系、エーテル系、
ケトン系、エマテル系溶剤溶液中で懸濁状態で行
うのが一般的であるが、上記化合物群のいずれか
の中に該磁性粉を混合して実施することも可能で
ある。また、該磁性粉の表面を予め上記化合物群
のいずれかでコーテイングしておいた後に反応さ
せることも可能であり、本発明の主旨を損わない
範囲で変更は可能である。
また、上記処理により形成された磁性体を用い
て磁気記録媒体となすに際しては、結着剤レジン
として、塩化ビニル−酢酸ビニル系レジン、フエ
ノキシ系レジン、エポキシ系レジン等の高弾性率
レジン及びウレタンエラストマー、アクリロニト
リルブタジエン共重合体等のエラストマー及び必
要に応じて、イソシアナート系、メラミン系、尿
素系等の硬化剤を用いてもよい。
これらの結着材レジン中に該磁性体を分散する
ために、結着材レジンを芳香族炭化水素；ベンゼ
ン、トルエン、キシレン等、ケトン、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、エステル、酢酸エチル、酢
酸ブチル、酢酸イソアミル等、エーテル、テトラ
ヒドロフラン、ジオキサン、エチルエーテル等、
アルコール、エタノール、イソプロパノール、ブ
タノール、セロソルブ等、に溶解した溶液で行う
のが一般的であり、硬化剤は分散された磁性塗料
が出来た後に添加するのが好都合である。
更に、該磁性体は分散性が高いため、界面活性
剤を用いる必要はないが、必要に応じて界面活性
剤を使用してもよい。
また、形成された磁気記録媒体の耐久性、走行
性、帯電防止等の性能向上のため、滑剤、離型剤
帯電防止剤、可塑剤等の添加剤を併用することも
有用である。
以下に本発明の実施例を付す。
実施例 １
粒径0.2μｍのγ−Fe2O3100部を10部のγ−グ
リシドキシプロピルトリメトキシシランの水・エ
タノール（１：３）溶液1000部（PH＝3.0に調整
する）に浸漬し、30分間撹拌した後、PH＝3.0の
水・エタノール溶液でデカンテーシヨンを３回行
い、100℃の乾燥器中に放置する。次いで、これ
を10部のジ−２−エチルヘキシルアミンとアセト
ン1000部に溶解した溶液中に浸漬し、60℃に加熱
しながら３時間撹拌した後、溶媒をトルエンに置
換し、全量を200部とする。これに数％のビニル
アルコールを含有する塩化ビニル−酢酸ビニル共
重合体系レジン20部、ウレタンエラストマー17
部、メチルエチルケトン、トルエン、シクロヘキ
サノンの混合溶媒に溶解したものを加えてボール
ミルで混合した後、トリレンジイソシアナートの
トリメチロールプロパンとの縮合体を５部加えて
ポリエステルフイルム上に塗布、磁場配向、乾
燥、カレンダー処理した後、磁気記録媒体を形成
した。
一方、比較例１として0.2μｍのγ−Fe2O3100
部とレシチン２部とをトルエン中に懸濁した後、
実施例と同様にレジン溶液を加えて磁気記録媒体
を形成した。
実施例１と比較例による磁性体の分散性、磁気
記録媒体の電磁変換特性を次表に記す。
The present invention relates to a magnetic material and a magnetic recording medium particularly suitable for high-density recording, and a method for manufacturing the magnetic material. Magnetic powder used in the manufacture of magnetic recording media for videos, computers, audio, etc. is used to reduce the particle size, improve dispersibility, and improve dispersion with the aim of reducing the noise level of magnetic recording media and achieving high-density recording. There is a growing demand for something with excellent stability. However, it is known that as the particle size of magnetic powder decreases, its cohesiveness increases, which not only makes dispersion difficult when forming into a paint, but also reduces dispersion stability. In view of the above circumstances, the present application provides a ferromagnetic material with excellent dispersibility and dispersion stability, and uses the magnetic material to provide a magnetic recording medium with a low noise level and suitable for high-density recording. It is something. That is, in the present invention, the surface of the ferromagnetic powder is coated with a silane coupling agent having an epoxy group, and further treated with a compound having a molecular weight of 100 or more and having 1 to 3 adjacent functional groups reactive with the epoxy group. This invention relates to a magnetic recording medium manufactured by applying a magnetic material obtained by bonding with an epoxy group and a non-aqueous paint containing the same onto a support, and employing surface treatment of such magnetic powder. This achieves the above effects. The ferromagnetic powder used in the present invention includes γ-
Fe 2 O 3 , Co. treatment γ-Fe 2 O 3 , Fe 3 O 4 , γ-Fe 2 O 3
reduced products, Fe−Co, Co−Cr, BaO.n (Fe 1 −
lM1) 2 O 3 (n=5.4~6.0, l=0~0.2, M=Ti,
Co, Zn, V, Nb, Sb, Ta, etc.), but they are not particularly limited to those described here. Further, the silane coupling agent having an epoxy group includes β-(3,4-epoxycyclohexyl)ethyl trimethoxysilane, γ-glycidoxypropyltrimethoxysilane, and the like. When coating the surface of magnetic powder with the silane coupling agent, generally an alcohol/water mixed solvent (PH<
4) is carried out by suspending magnetic powder, but it may also be carried out in a non-aqueous solvent such as alcohol or ketone. Furthermore, it has at least one type of functional group having reactive activity toward epoxy groups, such as an amino group, an amide group, a carboxyl group, a carboxylic acid chloride group, a hydroxyl group, and an isocyanate group, and one to three groups thereof are adjacent to each other. Compounds with a molecular weight of 100 or more include the following. Compounds having an amino group; diisobutylamine, 2-ethylhexylamine, di-2-ethylhexylamine, benzylamine, dibenzylamine, N-aminopropyl-2-pipecoline, 3
-ethoxypropylamine, 2-ethylhexyloxypropylamine, diethylaminopropylamine, dibutylaminopropylamine, n-butoxypropylamine, 4-aminobiphenyl,
Aminonaphthalene, aminotedracene, α-aminomethylaminododecyl, p-aminoazotoluene, aminoanthraquinone, etc. Compounds with carboxyl groups; linoleic acid,
Linoleic acid, oleic acid, stearic acid, lauric acid, palmitic acid, arachidic acid, myristic acid, dichloroacetic acid, cerotic acid, toluic acid, dichlorobenzoic acid, etc. Compounds having an amide group or carboxylic acid chloride group; derivatives of compounds having a carboxyl group. Compounds with hydroxyl groups; polyoxyethylene nonyl phenyl ether, polyoxyethylene dodecyl ether, dimethylphenol, dichlorophenol, oxynaphthoquinone, oxymethylquinoline, 2,3,-dioxynaphthoquinone, titradecanol, terpine olddecanol . Compounds having an isocyanate group; stearyl isocyanate, oleyl isocyanate, 1:1 condensate of polyoxyethylene nonyl phenyl ether and tolylene diisocyanate, etc. Compounds having an amino group, compounds having a carboxyl group, hydroxyl A 1:1 condensate of a compound having a group and a bifunctional isocyanate compound such as tolylene diisocyanate and 4,4'-methylenebisphenyl isocyanate. etc. When reacting these with the epoxy group coated on the surface of the magnetic powder and any of the above compounds, hydrocarbon-based, halogenated hydrocarbon-based, ether-based,
Although it is generally carried out in a suspended state in a ketone-based or ematel-based solvent solution, it is also possible to carry out the test by mixing the magnetic powder into any of the above-mentioned compound groups. It is also possible to react after the surface of the magnetic powder is coated in advance with any one of the above compounds, and changes can be made without departing from the spirit of the present invention. In addition, when forming a magnetic recording medium using the magnetic material formed by the above treatment, high elastic modulus resins such as vinyl chloride-vinyl acetate resins, phenoxy resins, epoxy resins, and urethane resins can be used as binder resins. An elastomer such as an elastomer or an acrylonitrile butadiene copolymer and, if necessary, an isocyanate-based, melamine-based, or urea-based curing agent may be used. In order to disperse the magnetic substance in these binder resins, binder resins are mixed with aromatic hydrocarbons such as benzene, toluene, xylene, ketones, acetone, etc.
Methyl ethyl ketone, methyl isobutyl ketone,
Cyclohexanone, etc., esters, ethyl acetate, butyl acetate, isoamyl acetate, etc., ethers, tetrahydrofuran, dioxane, ethyl ether, etc.
It is common to use a solution dissolved in alcohol, ethanol, isopropanol, butanol, cellosolve, etc., and it is convenient to add the curing agent after the dispersed magnetic paint is prepared. Further, since the magnetic material has high dispersibility, it is not necessary to use a surfactant, but a surfactant may be used if necessary. It is also useful to use additives such as a lubricant, a mold release agent, an antistatic agent, and a plasticizer in order to improve the performance of the formed magnetic recording medium, such as durability, runnability, and antistatic properties. Examples of the present invention are given below. Example 1 100 parts of γ-Fe 2 O 3 with a particle size of 0.2 μm was added to 1000 parts of a solution of 10 parts of γ-glycidoxypropyltrimethoxysilane in water/ethanol (1:3) (adjusted to PH = 3.0). After soaking and stirring for 30 minutes, decantation is performed three times with a water/ethanol solution of pH=3.0, and the sample is left in a dryer at 100°C. Next, this was immersed in a solution of 10 parts of di-2-ethylhexylamine and 1000 parts of acetone, stirred for 3 hours while heating to 60°C, and then the solvent was replaced with toluene to reduce the total amount to 200 parts. do. In addition, 20 parts of vinyl chloride-vinyl acetate copolymer resin containing several percent of vinyl alcohol, 17 parts of urethane elastomer
After adding 1 part dissolved in a mixed solvent of methyl ethyl ketone, toluene, and cyclohexanone and mixing in a ball mill, 5 parts of a condensate of tolylene diisocyanate with trimethylolpropane was added and coated on a polyester film, oriented in a magnetic field, and dried. After calendering, a magnetic recording medium was formed. On the other hand, as Comparative Example 1, 0.2 μm γ-Fe 2 O 3 100
After suspending 1 part and 2 parts of lecithin in toluene,
A magnetic recording medium was formed by adding a resin solution in the same manner as in the example. The dispersibility of the magnetic material and the electromagnetic conversion characteristics of the magnetic recording medium according to Example 1 and Comparative Example are shown in the following table.
【表】
但し、沈降速度は、トルエン溶媒中で比較し
た。ノイズレベル、出力は比較例を基準にし
た。
実施例 ２
粒径0.1μｍのBaO5.6（Fe0.9Co0.1Ti0.1）2O3を用
いた以外実施例１と全く同様に磁性体、磁気記録
媒体を形成した。また、比較例２としてBaO5.6
（Fe0.9Co0.1Ti0.1）2O3を用いた以外は比較例１と全
く同様にして磁気記録媒体を作成した。[Table] However, the sedimentation rates were compared in toluene solvent. The noise level and output were based on the comparative example.
Example 2 A magnetic material and a magnetic recording medium were formed in the same manner as in Example 1 except that BaO5.6 (Fe 0.9 Co 0.1 Ti 0.1 ) 2 O 3 having a particle size of 0.1 μm was used. In addition, as comparative example 2, BaO5.6
A magnetic recording medium was prepared in exactly the same manner as in Comparative Example 1 except that (Fe 0.9 Co 0.1 Ti 0.1 ) 2 O 3 was used.
【表】
これらの実施例にみられるように、本発明の磁
性粉は、磁性体沈降速度が著しく改善され、分散
安定性が改善されていることが明らかである。ま
た、それに伴つて、ノイズレベル、出力も向上し
ており、本発明によれば特性の優れた磁気記録媒
体を容易に製造することができる。[Table] As seen in these Examples, it is clear that the magnetic powder of the present invention has significantly improved magnetic sedimentation rate and improved dispersion stability. Further, the noise level and output are also improved accordingly, and according to the present invention, a magnetic recording medium with excellent characteristics can be easily manufactured.
Claims (1)
カツプリング剤表面処理層、およびアミノ基、ア
ミド基、カルボキシル基、カルボン酸クロライド
基、ヒドロキシル基、イソシアナート基などのエ
ポキシ基に対して反応活性な少なくとも１種以上
の官能基の１個以上３個以下を隣接して有する分
子量100以上の化合物表面処理層を有することを
特徴とする磁性体。 ２ 強磁性粉が六方晶系フエライトである特許請
求の範囲第１項記載の磁性体。 ３ 強磁性粉表面上にエポキシ基を有するシラン
カツプリング剤表面処理層、およびアミノ基、ア
ミド基、カルボキシル基、カルボン酸クロライド
基、ヒドロキシル基、イソシアナート基などのエ
ポキシ基に対して反応活性な少なくとも１種以上
の官能基の１個以上３個以下を隣接して有する分
子量100以上の化合物表面処理層を形成した磁性
体を含有する磁気記録層が支持体表面に塗布形成
されていることを特徴とする磁気記録媒体。 ４ 強磁性粉が六方晶系フエライトである特許請
求の範囲第３項記載の磁気記録媒体。 ５ 強磁性粉末をエポキシ基を有するシランカツ
プリング剤含有溶液で処理した後、更にアミノ
基、アミド基、カルボキシル基、カルボン酸、ク
ロライド基、ヒドロキシル基、イソシアナート基
などのエポキシ基に対して反応活性な少なくとも
１種以上の官能基の１個以上３個以下を隣接して
有する分子量100以上の化合物を含有する溶液で
処理し、シランカツプリング剤と、該化合物を反
応させることを特徴とする磁性体の製造方法。[Scope of Claims] 1. A silane coupling agent surface treatment layer having an epoxy group on the surface of the ferromagnetic powder, and an epoxy group such as an amino group, an amide group, a carboxyl group, a carboxylic acid chloride group, a hydroxyl group, an isocyanate group, etc. 1. A magnetic material comprising a surface-treated layer of a compound having a molecular weight of 100 or more and having 1 or more and 3 or less of at least one kind of functional group reactive with . 2. The magnetic material according to claim 1, wherein the ferromagnetic powder is hexagonal ferrite. 3 A silane coupling agent surface treatment layer having an epoxy group on the surface of the ferromagnetic powder, and a silane coupling agent surface treatment layer having epoxy groups on the surface of the ferromagnetic powder, and a silane coupling agent surface treatment layer that is reactive toward epoxy groups such as amino groups, amide groups, carboxyl groups, carboxylic acid chloride groups, hydroxyl groups, and isocyanate groups. A magnetic recording layer containing a magnetic material formed with a surface treatment layer of a compound having a molecular weight of 100 or more and having one to three of at least one functional group adjacent to each other is coated on the surface of the support. Features of magnetic recording media. 4. The magnetic recording medium according to claim 3, wherein the ferromagnetic powder is hexagonal ferrite. 5 After treating the ferromagnetic powder with a solution containing a silane coupling agent having an epoxy group, it is further reacted with epoxy groups such as amino groups, amide groups, carboxyl groups, carboxylic acids, chloride groups, hydroxyl groups, and isocyanate groups. It is characterized by treating with a solution containing a compound having a molecular weight of 100 or more and having one to three active functional groups of at least one kind or more, and reacting the compound with a silane coupling agent. Method of manufacturing magnetic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56070679A JPS57186302A (en) | 1981-05-13 | 1981-05-13 | Magnetic unit and magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56070679A JPS57186302A (en) | 1981-05-13 | 1981-05-13 | Magnetic unit and magnetic recording medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57186302A JPS57186302A (en) | 1982-11-16 |
| JPH0480521B2 true JPH0480521B2 (en) | 1992-12-18 |
Family
ID=13438567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56070679A Granted JPS57186302A (en) | 1981-05-13 | 1981-05-13 | Magnetic unit and magnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57186302A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0627271B2 (en) * | 1983-03-20 | 1994-04-13 | 日立マクセル株式会社 | Magnetic paint |
| JPS59218630A (en) * | 1983-05-26 | 1984-12-08 | Kao Corp | Magnetic recording medium |
| JPS59218631A (en) * | 1983-05-26 | 1984-12-08 | Kao Corp | Magnetic recording medium |
| CN115403300B (en) * | 2022-08-31 | 2023-09-26 | 合肥工业大学 | Modified nano foam stabilizer and application thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5376958A (en) * | 1976-12-20 | 1978-07-07 | Hitachi Maxell | Metal magnetic powder and said manufacturing process |
-
1981
- 1981-05-13 JP JP56070679A patent/JPS57186302A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5376958A (en) * | 1976-12-20 | 1978-07-07 | Hitachi Maxell | Metal magnetic powder and said manufacturing process |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57186302A (en) | 1982-11-16 |
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