JPH0262893B2 - - Google Patents
Info
- Publication number
- JPH0262893B2 JPH0262893B2 JP58205946A JP20594683A JPH0262893B2 JP H0262893 B2 JPH0262893 B2 JP H0262893B2 JP 58205946 A JP58205946 A JP 58205946A JP 20594683 A JP20594683 A JP 20594683A JP H0262893 B2 JPH0262893 B2 JP H0262893B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- present
- organic dye
- dye compound
- recording medium
- 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
- 150000001875 compounds Chemical class 0.000 claims description 33
- -1 amine salts Chemical class 0.000 claims description 15
- 239000006247 magnetic powder Substances 0.000 claims description 15
- 239000011230 binding agent Substances 0.000 claims description 13
- 230000002378 acidificating effect Effects 0.000 claims description 9
- 150000003839 salts Chemical class 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 2
- 125000000542 sulfonic acid group Chemical group 0.000 claims description 2
- 239000000975 dye Substances 0.000 description 23
- 239000003973 paint Substances 0.000 description 21
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 12
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- 238000004898 kneading Methods 0.000 description 7
- 239000000654 additive Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 229910001566 austenite Inorganic materials 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 125000004432 carbon atom Chemical group C* 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 229910017052 cobalt Inorganic materials 0.000 description 4
- 239000010941 cobalt Substances 0.000 description 4
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 4
- 229920001577 copolymer Polymers 0.000 description 4
- 239000003960 organic solvent Substances 0.000 description 4
- 229920006395 saturated elastomer Polymers 0.000 description 4
- 229920006311 Urethane elastomer Polymers 0.000 description 3
- 229920002433 Vinyl chloride-vinyl acetate copolymer Polymers 0.000 description 3
- 235000014113 dietary fatty acids Nutrition 0.000 description 3
- 239000002270 dispersing agent Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- 239000000194 fatty acid Substances 0.000 description 3
- 229930195729 fatty acid Natural products 0.000 description 3
- 239000012860 organic pigment Substances 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 125000004417 unsaturated alkyl group Chemical group 0.000 description 3
- 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
- ALKYHXVLJMQRLQ-UHFFFAOYSA-N 3-Hydroxy-2-naphthoate Chemical class C1=CC=C2C=C(O)C(C(=O)O)=CC2=C1 ALKYHXVLJMQRLQ-UHFFFAOYSA-N 0.000 description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 229920002284 Cellulose triacetate Polymers 0.000 description 2
- 229910020630 Co Ni Inorganic materials 0.000 description 2
- 229910002440 Co–Ni Inorganic materials 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- NNLVGZFZQQXQNW-ADJNRHBOSA-N [(2r,3r,4s,5r,6s)-4,5-diacetyloxy-3-[(2s,3r,4s,5r,6r)-3,4,5-triacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxy-6-[(2r,3r,4s,5r,6s)-4,5,6-triacetyloxy-2-(acetyloxymethyl)oxan-3-yl]oxyoxan-2-yl]methyl acetate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](OC(C)=O)[C@H]1OC(C)=O)O[C@H]1[C@@H]([C@@H](OC(C)=O)[C@H](OC(C)=O)[C@@H](COC(C)=O)O1)OC(C)=O)COC(=O)C)[C@@H]1[C@@H](COC(C)=O)O[C@@H](OC(C)=O)[C@H](OC(C)=O)[C@H]1OC(C)=O NNLVGZFZQQXQNW-ADJNRHBOSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 2
- 239000012461 cellulose resin Substances 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 150000004665 fatty acids Chemical class 0.000 description 2
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000787 lecithin Substances 0.000 description 2
- 229940067606 lecithin Drugs 0.000 description 2
- 235000010445 lecithin Nutrition 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229920001485 poly(butyl acrylate) polymer Polymers 0.000 description 2
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 239000011112 polyethylene naphthalate Substances 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 229920001228 polyisocyanate Polymers 0.000 description 2
- 239000005056 polyisocyanate Substances 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229920005749 polyurethane resin Polymers 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- JNYAEWCLZODPBN-JGWLITMVSA-N (2r,3r,4s)-2-[(1r)-1,2-dihydroxyethyl]oxolane-3,4-diol Chemical compound OC[C@@H](O)[C@H]1OC[C@H](O)[C@H]1O JNYAEWCLZODPBN-JGWLITMVSA-N 0.000 description 1
- 150000004786 2-naphthols Chemical class 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229910020674 Co—B Inorganic materials 0.000 description 1
- 229910017061 Fe Co Inorganic materials 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 239000000020 Nitrocellulose Substances 0.000 description 1
- SYNHCENRCUAUNM-UHFFFAOYSA-N Nitrogen mustard N-oxide hydrochloride Chemical class Cl.ClCC[N+]([O-])(C)CCCl SYNHCENRCUAUNM-UHFFFAOYSA-N 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- KGWWEXORQXHJJQ-UHFFFAOYSA-N [Fe].[Co].[Ni] Chemical compound [Fe].[Co].[Ni] KGWWEXORQXHJJQ-UHFFFAOYSA-N 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 239000000980 acid dye Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 150000003973 alkyl amines Chemical class 0.000 description 1
- 125000002947 alkylene group Chemical group 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- PYKYMHQGRFAEBM-UHFFFAOYSA-N anthraquinone Natural products CCC(=O)c1c(O)c2C(=O)C3C(C=CC=C3O)C(=O)c2cc1CC(=O)OC PYKYMHQGRFAEBM-UHFFFAOYSA-N 0.000 description 1
- 150000004056 anthraquinones Chemical class 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 125000000732 arylene group Chemical group 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- 239000000981 basic dye Substances 0.000 description 1
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 239000003093 cationic surfactant Substances 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 229940090961 chromium dioxide Drugs 0.000 description 1
- IAQWMWUKBQPOIY-UHFFFAOYSA-N chromium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Cr+4] IAQWMWUKBQPOIY-UHFFFAOYSA-N 0.000 description 1
- AYTAKQFHWFYBMA-UHFFFAOYSA-N chromium(IV) oxide Inorganic materials O=[Cr]=O AYTAKQFHWFYBMA-UHFFFAOYSA-N 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000001723 curing Methods 0.000 description 1
- 150000004985 diamines Chemical class 0.000 description 1
- PPSZHCXTGRHULJ-UHFFFAOYSA-N dioxazine Chemical compound O1ON=CC=C1 PPSZHCXTGRHULJ-UHFFFAOYSA-N 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000001227 electron beam curing Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 125000005843 halogen group Chemical group 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
- PXZQEOJJUGGUIB-UHFFFAOYSA-N isoindolin-1-one Chemical compound C1=CC=C2C(=O)NCC2=C1 PXZQEOJJUGGUIB-UHFFFAOYSA-N 0.000 description 1
- 239000003446 ligand Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910001004 magnetic alloy Inorganic materials 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920001220 nitrocellulos Polymers 0.000 description 1
- 125000000018 nitroso group Chemical group N(=O)* 0.000 description 1
- AJCDFVKYMIUXCR-UHFFFAOYSA-N oxobarium;oxo(oxoferriooxy)iron Chemical compound [Ba]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O AJCDFVKYMIUXCR-UHFFFAOYSA-N 0.000 description 1
- DGBWPZSGHAXYGK-UHFFFAOYSA-N perinone Chemical compound C12=NC3=CC=CC=C3N2C(=O)C2=CC=C3C4=C2C1=CC=C4C(=O)N1C2=CC=CC=C2N=C13 DGBWPZSGHAXYGK-UHFFFAOYSA-N 0.000 description 1
- 125000002080 perylenyl group Chemical group C1(=CC=C2C=CC=C3C4=CC=CC5=CC=CC(C1=C23)=C45)* 0.000 description 1
- CSHWQDPOILHKBI-UHFFFAOYSA-N peryrene Natural products C1=CC(C2=CC=CC=3C2=C2C=CC=3)=C3C2=CC=CC3=C1 CSHWQDPOILHKBI-UHFFFAOYSA-N 0.000 description 1
- 150000003014 phosphoric acid esters Chemical class 0.000 description 1
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical class 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 1
- 229920001281 polyalkylene Polymers 0.000 description 1
- 125000003367 polycyclic group Chemical group 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- JEXVQSWXXUJEMA-UHFFFAOYSA-N pyrazol-3-one Chemical class O=C1C=CN=N1 JEXVQSWXXUJEMA-UHFFFAOYSA-N 0.000 description 1
- IZMJMCDDWKSTTK-UHFFFAOYSA-N quinoline yellow Chemical compound C1=CC=CC2=NC(C3C(C4=CC=CC=C4C3=O)=O)=CC=C21 IZMJMCDDWKSTTK-UHFFFAOYSA-N 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 150000003335 secondary amines Chemical class 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- JOUDBUYBGJYFFP-FOCLMDBBSA-N thioindigo Chemical compound S\1C2=CC=CC=C2C(=O)C/1=C1/C(=O)C2=CC=CC=C2S1 JOUDBUYBGJYFFP-FOCLMDBBSA-N 0.000 description 1
- AAAQKTZKLRYKHR-UHFFFAOYSA-N triphenylmethane Chemical compound C1=CC=CC=C1C(C=1C=CC=CC=1)C1=CC=CC=C1 AAAQKTZKLRYKHR-UHFFFAOYSA-N 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Landscapes
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
Description
本発明は磁性粉および結着剤を用いた磁気記録
媒体に関するもので、特に磁性粉の分散性および
磁気特性を向上させた磁気記録媒体に関するもの
である。
従来、論音テープ、ビデオテープ、磁気デイス
ク、フロツピーデイスク等の磁気記録媒体にあつ
ては、ポリエチレンテレフタレート、ポリエチレ
ンナフタレート、三酢酸セルロース、ポリカーボ
ネート、ポリプロピレン、ポリ塩化ビニル、アル
ミニウム、合金などの支持体上に、γ−Fe2O3、
Fe3O4、コバルトをドープしたγ−Fe2O3、
CrO2、鉄粉および鉄−コバルト−ニツケルの合
金等の磁性粉を、塩化ビニル−酢酸ビニル共重合
体、塩化ビニル−塩化ビニリデン共重合体、ポリ
アクリル酸ブチル、アクリル酸ブチル−アクリロ
ニトリル共重合体、セルロース系樹脂、エポキシ
系樹脂、ポリウレタン系樹脂等の結着剤と混練し
て塗工していた。
しかしながら、これらの結着剤単独あるいは２
種以上の組合せによつてもこれら結着剤中への磁
性粉の分散性は不良であるため、表面の平滑性、
安定性等が不十分となり、さらに、磁気特性にお
いても角型比（Br／Bm）、Ｓ／Ｎ比および感度
等が非常に低かつた。
このため、磁性粉の分散性、安定性等を向上さ
せる目的で、種々の添加剤が使用されている。例
えば、高級脂肪酸、脂肪酸アミド、脂肪酸エステ
ル、高級アルコールエステル、ポリエチレンオキ
サイド、レシチン等である。
しかし、これらの添加剤を加えても、かならず
しも望ましい特性を有する磁性層を得ることは困
難であつた。例えば、これらの添加剤を多量に使
用した場合に、表面平滑性、走行安定性はいくぶ
ん改良されるが、磁性層の機械的強度の低下、あ
るいは磁性層表面に添加剤がしみ出てくる、いわ
ゆるブルーミング現象が発生し、磁気記録媒体と
して好ましくない結果を与える。このように、磁
性層の特性および分散性も、けつして満足のいく
ものではなかつた。
本発明者等は、かかる欠点を改良すべく鋭意検
討を重ねた結果、本発明をなすに到つた。
すなわち、本発明は、磁性粉および結着剤を含
む磁性層を支持体上に形成して成る磁気記録媒体
において、磁性層に、酸性基またはその塩を１個
または２個以上有する有機色素化合物を含有せし
めてなる磁気記録媒体に係わるものである。
本発明に用いられる酸性基を有する有機色素化
合物において、酸性基とは、水酸基、カルボキシ
ル基、スルホン酸基等であり、また、これら酸性
基を持ち得る有機色素化合物は、アゾ化合物、例
えば、β−ナフトール系、β−オキシナフトエ酸
系、β−オキシナフトエ酸アリリド系、アセト酢
酸アリリド系、アセト酢酸アミノベンズイミダゾ
ロン系、ピラゾロン系または縮合アゾ系、縮合多
環化合物、例えば、フタロシアニン系、キナクリ
ドン系、アントラキノン系、ペリレン系、ペリノ
ン系、チオインジゴ系、ジオキサジン系、イソイ
ンドリノン系、キノフタロン系またはトリフエニ
ルメタン系、金属錯体化合物、Ｘ例えば、アゾ
系、ニトロソ系及びアゾメチン系、また、これら
化合物は金属と錯体を形成していない配位子のま
までも良い。または、染付けレーキ化合物、例え
ば、酸性染料レーキ系、塩基性染料レーキ系等で
ある。酸性基は上記有機色素化合物に直接結合す
るか、あるいは、カルボン酸アミド、または、ス
ルホン酸アミドを介し、もしくは介さない置換さ
れていても良い炭素数１〜20の飽和もしくは不飽
和のアルキレン基またはアリレン基を介して結合
していても良い。
また、本発明の有機色素化合物は酸性基以外
に、炭素数１〜20の飽和もしくは不飽和アルキル
基、アリール基、ハロゲン原子、−OR1、−
NR1R2、−CONR1R2、SO2NR1R2、−SR1、−CN、
−NO2、−NR1COR2、−NR1SO2R2、−C00R3（R1、
R2は水素原子、炭素数１〜20の飽和もしくは不
飽和アルキル基、アリール基、R3は炭素数１〜
20の飽和または不飽和アルキル基を表す）等の置
換基を有していても良い。
また、酸性基は、１価または２価の金属もしく
は有機アミン等によつて塩を形成していても良
い。場合によつては、アンモニウム塩であつても
よい。金属塩の金属としてはナトリウム、カリウ
ム、マグネシウム、カルシウム、亜鉛、バリウ
ム、ストロンチウム、マンガン、鉄、ニツケル、
コバルト等である。また、アミン塩のアミンとし
ては脂肪族第１級アミン、第２級アミンまたはジ
アミン等である。
本発明の化合物を磁気記録媒体の磁性層中に含
有せしめるには、本発明に係わる有機色素化合物
の少なくとも１種を水またはトルエン、メチルエ
チルケトン、あるいは、シクロヘキサノン等の有
機溶媒に溶解し、その溶液に所定の割合で、磁性
粉を浸漬し、撹拌混合した後、濾別し乾燥処理し
て得られた処理磁性粉と結着剤を混練するか、あ
るいは本発明に係わる有機色素化合物の少なくと
も１種を磁性粉の分散時に直接または適当な溶媒
に溶解して添加しても良い。さらには、磁性塗料
の支持体への塗工前に添加することも可能であ
る。
本発明の有機色素化合物は、通常、磁性粉に対
して0.1重量％〜20重量％、好ましくは0.5重量％
〜10重量％の範囲で使用されるのが望ましい。
本発明の有機色素化合物を用いて磁性粉および
結着剤を有機溶剤等を用いて混練分散して得られ
た磁性塗料は、分散安定性に優れており粘度が低
く、さらに、経時のニス分れも少なく、再度分散
性も容易であり、塗工の作業性も著しく優れてい
る。
本発明に用いられる磁性粉としては、γ−
Fe2O3、Fe3O4、γ−Fe2O3とFe3O4との混晶、コ
バルトをドープしたγ−Fe2O3、コバルトをドー
プしたFe3O4、二酸化クロム、バリウムフエライ
ト、または鉄、コバルト等の金属磁性体、あるい
は種々の合金磁性体（例えば、Fe−Co、Co−
Ni、Fe−Co−Ni、Ni−Co−Ｂ Fe−Co−Cr、
Fe−Cr−Ni、MoBi等）などが挙げられる。
また、本発明に使用しうる結着剤としては特に
制限がなく、例えば前述したような、塩化ビニル
−酢酸ビニル共重合体、塩化ビニル−塩化ビニリ
デン共重合体、ポリアクリル酸ブチル、アクリル
酸ブチル−アクリロニトリル共重合体、セルロー
ス系樹脂、エポキシ系樹脂、ポリウレタン系樹脂
等、公知の種々の結着剤およびそれらの混合物を
使用することができる。なお、結着剤としては、
熱可塑性型、熱硬化型、電子線硬化型等いずれの
タイプであつてもよい。
また、本発明において、本発明の有機色素化合
物と、従来公知の、例えば、レシチン、オキシア
ミン化合物、アルキルアミン系カチオン界面活性
剤、ポリアルキレンソルビタンアルキレート、リ
ン酸エステル等の分散剤あるいはその他潤滑剤、
安定剤等を併用添加することにより、磁性層の特
性を一層高めることが可能である。
本発明に係わる磁気記録媒体は、支持体上に、
磁性粉、結合剤、および本発明に係わる有機色素
化合物等を有機溶媒等を用いて混練分散した磁性
塗料を塗布乾燥することによつて磁性層を形成し
たものである。かかる磁性塗料の製造および塗布
法は、従来の方法を適用すれば良く、また、上記
本発明の磁性層には、分散剤、潤滑剤、研磨剤、
帯電防止剤等の添加剤を必要に応じて含有しても
良い。
本発明に係わる磁気記録媒体に用いられる支持
体としては、ポリエチレンテレフタレート、ポリ
エチレンナフタレート、三酢酸セルロース、ポリ
カーボネート、ポリプロピレン、ポリ塩化ビニ
ル、アルミニウム合金等の任意のものを挙げるこ
とができる。
なお、本発明の磁性層は、通常2μ〜20μの乾燥
膜厚となるように塗設すれば良い。
以上、本発明についての説明を、従来の磁気記
録媒体との相違点を主眼にして行つたが、その他
の技術的構成、例えば、結合剤および必要に応じ
て用いられる添加剤等の種類および使用量、さら
に支持体の種類や表面平滑化処理方法、磁性粉の
配向方法、塗布の際に用いる有機溶剤の種類、乾
燥方法、硬化方法等については公知の技術を適用
ないし応用すれば良い。
以下、実施例および比較例を挙げて本発明を具
体的に説明する。
実施例 １
コバルトをドープしたγ−Fe2O3粉 100重量部
塩化ビニル−酢酸ビニル共重合体 ７ 〃
ウレタンエラストマー 15 〃
本発明に係わる下記有機色素化合物〔〕
３ 〃
トルエン 50 〃
メチルエチルケトン 50 〃
シクロヘキサノン 20 〃
有機色素化合物〔〕
上記化合物をサンドミルを用いて４時間混練分
散して磁性塗料を得た。これを塗料１−Ａとす
る。この塗料１−Ａを15ミクロンのポリエステル
フイルム上に塗布乾燥後、スーパーカレンダーロ
ールにより磁性層の表面処理加工を行い加熱硬化
させた。これを3.81cm巾に裁断して磁性層厚4μｍ
のオーデイオ用磁気テープを作成した。これを試
料１−Ｂとする。
実施例 ２〜29
実施例１において使用した本発明に係わる有機
色素化合物〔〕に換えて下記の表１に示す有機
色素化合物を使用した。その他の組成、操作、方
法等は実施例１と同様である。このようにして得
られた磁性塗料並びに磁性テープをそれぞれ塗料
２−Ａ〜29−Ａ、試料２−Ｂ〜29−Ｂとする。
比較例 １〜３
実施例１において、本発明に係わる有機色素化
合物〔〕を表２に示す如く置き換えて、それぞ
れ比較例１〜３とした。
以上の実施例１〜29および比較例１〜３の磁性
塗料の各塗料の特性および磁気テープの各試料の
特性を測定し、それらの結果を表３および表４に
示す。
The present invention relates to a magnetic recording medium using magnetic powder and a binder, and particularly to a magnetic recording medium in which the dispersibility and magnetic properties of magnetic powder are improved. Conventionally, magnetic recording media such as argon tapes, video tapes, magnetic disks, and floppy disks have been made of polyethylene terephthalate, polyethylene naphthalate, cellulose triacetate, polycarbonate, polypropylene, polyvinyl chloride, aluminum, alloys, etc. On the body, γ-Fe 2 O 3 ,
Fe 3 O 4 , cobalt-doped γ-Fe 2 O 3 ,
Magnetic powder such as CrO 2 , iron powder, and iron-cobalt-nickel alloy is combined with vinyl chloride-vinyl acetate copolymer, vinyl chloride-vinylidene chloride copolymer, polybutyl acrylate, butyl acrylate-acrylonitrile copolymer. It was applied by kneading it with a binder such as cellulose resin, epoxy resin, or polyurethane resin. However, these binders alone or in combination
Even with combinations of more than one species, the dispersibility of magnetic powder in these binders is poor, so surface smoothness,
Stability, etc. were insufficient, and furthermore, regarding magnetic properties, squareness ratio (Br/Bm), S/N ratio, sensitivity, etc. were extremely low. For this reason, various additives are used for the purpose of improving the dispersibility, stability, etc. of magnetic powder. Examples include higher fatty acids, fatty acid amides, fatty acid esters, higher alcohol esters, polyethylene oxide, and lecithin. However, even with the addition of these additives, it has been difficult to obtain a magnetic layer having desirable characteristics. For example, if a large amount of these additives is used, the surface smoothness and running stability may be improved to some extent, but the mechanical strength of the magnetic layer may be reduced, or the additive may seep onto the surface of the magnetic layer. A so-called blooming phenomenon occurs, giving undesirable results as a magnetic recording medium. As described above, the characteristics and dispersibility of the magnetic layer were not at all satisfactory. The inventors of the present invention have made extensive studies to improve these drawbacks, and as a result, they have completed the present invention. That is, the present invention provides a magnetic recording medium comprising a magnetic layer containing magnetic powder and a binder formed on a support, in which the magnetic layer contains an organic dye compound having one or more acidic groups or salts thereof. The present invention relates to a magnetic recording medium containing the following. In the organic dye compound having an acidic group used in the present invention, the acidic group is a hydroxyl group, a carboxyl group, a sulfonic acid group, etc., and the organic dye compound that can have these acidic groups is an azo compound, for example, β - Naphthol series, β-oxynaphthoic acid series, β-oxynaphthoic acid arylide series, acetoacetic arylide series, acetoacetic acid aminobenzimidazolone series, pyrazolone series or fused azo series, fused polycyclic compounds, such as phthalocyanine series, quinacridones X-based, anthraquinone-based, perylene-based, perinone-based, thioindigo-based, dioxazine-based, isoindolinone-based, quinophthalone-based or triphenylmethane-based, metal complex compounds, such as azo-based, nitroso-based and azomethine-based, and these compounds may remain as a ligand that does not form a complex with the metal. Alternatively, it is a dyeing lake compound, such as an acid dye lake type, a basic dye lake type, etc. The acidic group is directly bonded to the organic dye compound, or is an optionally substituted saturated or unsaturated alkylene group having 1 to 20 carbon atoms, with or without a carboxylic acid amide or sulfonic acid amide. They may be bonded via an arylene group. In addition to the acidic group, the organic dye compound of the present invention also has a saturated or unsaturated alkyl group having 1 to 20 carbon atoms, an aryl group, a halogen atom, -OR 1 , -
NR 1 R 2 , −CONR 1 R 2 , SO 2 NR 1 R 2 , −SR 1 , −CN,
−NO 2 , −NR 1 COR 2 , −NR 1 SO 2 R 2 , −C00R 3 (R 1 ,
R 2 is a hydrogen atom, a saturated or unsaturated alkyl group with 1 to 20 carbon atoms, or an aryl group, R 3 is a hydrogen atom with 1 to 20 carbon atoms
20 saturated or unsaturated alkyl groups). Further, the acidic group may form a salt with a monovalent or divalent metal, an organic amine, or the like. In some cases, it may be an ammonium salt. Metal salts include sodium, potassium, magnesium, calcium, zinc, barium, strontium, manganese, iron, nickel,
Cobalt etc. The amine of the amine salt may be an aliphatic primary amine, a secondary amine or a diamine. In order to incorporate the compound of the present invention into the magnetic layer of a magnetic recording medium, at least one organic dye compound according to the present invention is dissolved in water or an organic solvent such as toluene, methyl ethyl ketone, or cyclohexanone. Either by immersing magnetic powder in a predetermined ratio, mixing with stirring, filtering and drying, and kneading the treated magnetic powder and a binder, or at least one organic dye compound according to the present invention. may be added directly or dissolved in an appropriate solvent during dispersion of the magnetic powder. Furthermore, it is also possible to add the magnetic coating material before applying it to the support. The organic dye compound of the present invention is usually 0.1% to 20% by weight, preferably 0.5% by weight based on the magnetic powder.
It is desirable to use it in a range of ~10% by weight. The magnetic paint obtained by kneading and dispersing the magnetic powder and binder using the organic dye compound of the present invention using an organic solvent etc. has excellent dispersion stability and low viscosity, and furthermore, the varnish does not deteriorate over time. It also has a low amount of water, is easy to redisperse, and has excellent coating workability. The magnetic powder used in the present invention includes γ-
Fe 2 O 3 , Fe 3 O 4 , mixed crystal of γ-Fe 2 O 3 and Fe 3 O 4 , cobalt-doped γ-Fe 2 O 3 , cobalt-doped Fe 3 O 4 , chromium dioxide, barium Ferrite, or metal magnetic materials such as iron and cobalt, or various alloy magnetic materials (e.g. Fe-Co, Co-
Ni, Fe-Co-Ni, Ni-Co-B Fe-Co-Cr,
(Fe-Cr-Ni, MoBi, etc.). Furthermore, there are no particular limitations on the binder that can be used in the present invention, such as vinyl chloride-vinyl acetate copolymer, vinyl chloride-vinylidene chloride copolymer, polybutyl acrylate, butyl acrylate, etc. - Various known binders such as acrylonitrile copolymers, cellulose resins, epoxy resins, polyurethane resins, and mixtures thereof can be used. In addition, as a binder,
It may be of any type such as thermoplastic type, thermosetting type, electron beam curing type, etc. In the present invention, the organic coloring compound of the present invention and conventionally known dispersants such as lecithin, oxyamine compounds, alkylamine cationic surfactants, polyalkylene sorbitan alkylates, phosphate esters, or other lubricants may be used. ,
By adding a stabilizer or the like in combination, it is possible to further improve the characteristics of the magnetic layer. The magnetic recording medium according to the present invention includes, on a support,
A magnetic layer is formed by applying and drying a magnetic paint prepared by kneading and dispersing magnetic powder, a binder, and the organic dye compound according to the present invention using an organic solvent or the like. Conventional methods may be used to manufacture and apply such a magnetic paint, and the magnetic layer of the present invention may contain dispersants, lubricants, abrasives,
Additives such as antistatic agents may be included as necessary. Examples of the support used in the magnetic recording medium according to the present invention include polyethylene terephthalate, polyethylene naphthalate, cellulose triacetate, polycarbonate, polypropylene, polyvinyl chloride, aluminum alloy, and the like. The magnetic layer of the present invention may be coated to have a dry film thickness of usually 2 μm to 20 μm. The present invention has been described above with a focus on its differences from conventional magnetic recording media, but other technical configurations, such as the type and use of binders and additives used as necessary, may also be discussed. Known techniques may be used for the amount, type of support, method of surface smoothing treatment, method of orientation of magnetic powder, type of organic solvent used during coating, drying method, curing method, etc. The present invention will be specifically described below with reference to Examples and Comparative Examples. Example 1 γ-Fe 2 O 3 powder doped with cobalt 100 parts by weight Vinyl chloride-vinyl acetate copolymer 7 Urethane elastomer 15 The following organic dye compound according to the present invention []
3 〃 Toluene 50 〃 Methyl ethyl ketone 50 〃 Cyclohexanone 20 〃 Organic pigment compound [] The above compound was kneaded and dispersed for 4 hours using a sand mill to obtain a magnetic paint. This is referred to as paint 1-A. This coating material 1-A was coated on a 15 micron polyester film and dried, then the magnetic layer was surface treated using a super calendar roll and cured by heating. This was cut into 3.81 cm width and the magnetic layer thickness was 4 μm.
created a magnetic tape for audio. This is designated as sample 1-B. Examples 2 to 29 In place of the organic dye compound according to the present invention used in Example 1, organic dye compounds shown in Table 1 below were used. Other compositions, operations, methods, etc. are the same as in Example 1. The magnetic paints and magnetic tapes thus obtained are designated as paints 2-A to 29-A and samples 2-B to 29-B, respectively. Comparative Examples 1 to 3 Comparative Examples 1 to 3 were obtained by replacing the organic dye compound [ ] according to the present invention in Example 1 as shown in Table 2. The characteristics of each of the magnetic paints of Examples 1 to 29 and Comparative Examples 1 to 3 and the characteristics of each sample of magnetic tape were measured, and the results are shown in Tables 3 and 4.
【表】【table】
【表】【table】
【表】【table】
【表】【table】
【表】【table】
【表】【table】
【表】【table】
【表】【table】
【表】【table】
【表】【table】
【表】【table】
【表】【table】
【表】【table】
【表】【table】
【表】
実施例 30
磁性合金（Fe−Co−Ni） 100重量部
ポリエステル ６ 〃
ウレタンエラストマー 16 〃
実施例21の有機色素化合物 ５ 〃
トルエン 20 〃
メチルエチルケトン 80 〃
シクロヘキサノン 10 〃
上記組成物を実施例１と同様な方法で混練分散
して磁性塗料を得た。これを塗料30−Ａとする。
さらにこの磁性塗料を実施例１と同様に処理して
磁気テープを作成した。これを試料30−Ａとす
る。
実施例 31〜58
実施例30において、使用した有機色素化合物に
換えて、下記表５に示す有機色素化合物を使用し
た。
その他の組成は実施例30と同様であり、また、
操作及び方法等は実施例１と同様にして磁気テー
プを作成した。このようにして得られた磁性塗料
をそれぞれ塗料31−Ａ〜58−Ａ、また、磁気テー
プをそれぞれ試料31−Ｂ〜58−Ｂとする。
比較例 ４〜６
実施例30において使用した有機色素化合物を表
６に示す如く置き換えて、それぞれ比較例４〜６
とした。
以上の実施例30〜58および比較例４〜６の磁性
塗料の各塗料の特性および磁気テープの各試料の
特性を測定し、それらの結果を表７および表８に
示す。[Table] Example 30 Magnetic alloy (Fe-Co-Ni) 100 parts by weight Polyester 6 Urethane elastomer 16 Organic dye compound of Example 21 5 Toluene 20 Methyl ethyl ketone 80 Cyclohexanone 10 The above composition was used in Example 1 A magnetic paint was obtained by kneading and dispersing in the same manner as above. This is called paint 30-A.
Further, this magnetic paint was treated in the same manner as in Example 1 to produce a magnetic tape. This is designated as sample 30-A. Examples 31 to 58 In Example 30, organic dye compounds shown in Table 5 below were used in place of the organic dye compounds used. The other compositions are the same as in Example 30, and
A magnetic tape was produced using the same operations and methods as in Example 1. The thus obtained magnetic paints were designated as paints 31-A to 58-A, and the magnetic tapes were designated as samples 31-B to 58-B, respectively. Comparative Examples 4 to 6 Comparative Examples 4 to 6 were prepared by replacing the organic dye compounds used in Example 30 as shown in Table 6.
And so. The characteristics of each of the magnetic paints of Examples 30 to 58 and Comparative Examples 4 to 6 and the characteristics of each sample of magnetic tape were measured, and the results are shown in Tables 7 and 8.
【表】【table】
【表】【table】
【表】【table】
【表】【table】
【表】【table】
【表】【table】
【表】【table】
【表】【table】
【表】【table】
【表】【table】
【表】【table】
【表】【table】
【表】
実施例 59
コバルトをドープしたFeO粉 100重量部
ニトロセルロース樹脂 ２ 〃
ウレタンエラストマー 16 〃
エポキシ樹脂 ４ 〃
本発明に係わる下記有機色素化合物〔〕
５ 〃
トルエン 45 〃
メチルエチルケトン 45 〃
シクロヘキサノン 20 〃
本発明に係わる有機色素化合物〔〕
上記組成物を実施例１と同様な方法で混練分散
した後、ポリイソシアネート３重量部を添加し、
撹拌混合して磁性塗料を得た。これを、塗料59−
Ａとする。さらに、この磁性塗料を実施例１と同
様に処理して磁気テープを作成した。これを試料
59−Ｂとする。
実施例 60〜73
実施例59において使用した本発明に係わる有機
色素化合物〔〕に換えて、下記表９に示す有機
色素化合物を使用した。
その他の組成は実施例59と同様である。この組
成物を実施例１と同様な方法で混練分散した後、
ポリイソシアネート３重量部を添加し、撹拌混合
して磁性塗料を得た。これをそれぞれ塗料60−Ａ
〜73−Ａとする。さらにこの磁性塗料を、実施例
１と同様に処理して磁性テープを作成した。これ
をそれぞれ試料60−Ｂ〜72−Ｂとする。
比較例 ７〜９
実施例59において、本発明に係わる有機色素化
合物〔〕を表10に示す如く置き換えてそれぞれ
比較例７〜９とした。
以上の実施例59〜73および比較例７〜９の磁性
塗料の各塗料の特性および磁気テープの各試料の
特性を測定し、それらの結果を表11および表12に
示す。[Table] Example 59 FeO powder doped with cobalt 100 parts by weight Nitrocellulose resin 2 Urethane elastomer 16 Epoxy resin 4 The following organic dye compound according to the present invention []
5 〃 Toluene 45 〃 Methyl ethyl ketone 45 〃 Cyclohexanone 20 〃 Organic dye compound according to the present invention [] After kneading and dispersing the above composition in the same manner as in Example 1, 3 parts by weight of polyisocyanate was added,
A magnetic paint was obtained by stirring and mixing. Apply this to paint 59−
Let it be A. Furthermore, this magnetic paint was treated in the same manner as in Example 1 to produce a magnetic tape. sample this
59-B. Examples 60 to 73 In place of the organic dye compound according to the present invention used in Example 59, organic dye compounds shown in Table 9 below were used. The other compositions are the same as in Example 59. After kneading and dispersing this composition in the same manner as in Example 1,
3 parts by weight of polyisocyanate was added and mixed with stirring to obtain a magnetic paint. Paint 60-A each.
~73-A. Further, this magnetic paint was treated in the same manner as in Example 1 to produce a magnetic tape. These are designated as samples 60-B to 72-B, respectively. Comparative Examples 7 to 9 In Example 59, the organic dye compound according to the present invention [ ] was replaced as shown in Table 10 to give Comparative Examples 7 to 9, respectively. The characteristics of each of the magnetic paints of Examples 59 to 73 and Comparative Examples 7 to 9 and the characteristics of each sample of magnetic tape were measured, and the results are shown in Tables 11 and 12.
【表】【table】
【表】【table】
【表】【table】
【表】【table】
【表】【table】
【表】【table】
【表】
実施例 74〜76
実施例１において、使用した本発明に係わる有
機色素化合物〔〕に換えて、表13の如く従来公
知の分散剤と、本発明に係わる有機色素化合物を
併用添加した。その他の組成、操作、方法等は実
施例１と同様である。このようにして得られた磁
気テープをそれぞれ試料74−Ｂ〜76−Ｂとする。
以上の実施例74〜76の磁気テープの各試料の特
性を測定し、それらの結果を表14に示す。[Table] Examples 74 to 76 In Example 1, in place of the organic pigment compound according to the present invention used [], a conventionally known dispersant and an organic pigment compound according to the present invention were added in combination as shown in Table 13. . Other compositions, operations, methods, etc. are the same as in Example 1. The magnetic tapes thus obtained are designated as samples 74-B to 76-B, respectively. The characteristics of each sample of the magnetic tape of Examples 74 to 76 above were measured, and the results are shown in Table 14.
【表】【table】
【表】【table】
Claims (1)
に形成して成る磁気記録媒体において、磁性層
に、酸性基またはその塩を有する有機色素化合物
を含有せしめてなることを特徴とする磁気記録媒
体。 ２ 水酸基、カルボキシル基、スルホン酸基なら
びにこれらの１価もしくは２価の金属塩またはア
ミン塩から選ばれる少なくとも１種以上の酸性基
またはその塩を有する有機色素化合物を磁性層に
含有せしめてなる特許請求の範囲第１項記載の磁
気記録媒体。[Scope of Claims] 1. A magnetic recording medium comprising a magnetic layer containing magnetic powder and a binder formed on a support, wherein the magnetic layer contains an organic dye compound having an acidic group or a salt thereof. A magnetic recording medium characterized by: 2. A patent in which a magnetic layer contains an organic dye compound having at least one or more acidic groups selected from hydroxyl groups, carboxyl groups, sulfonic acid groups, and monovalent or divalent metal salts or amine salts thereof, or their salts. A magnetic recording medium according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58205946A JPS6098525A (en) | 1983-11-04 | 1983-11-04 | Magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58205946A JPS6098525A (en) | 1983-11-04 | 1983-11-04 | Magnetic recording medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6098525A JPS6098525A (en) | 1985-06-01 |
| JPH0262893B2 true JPH0262893B2 (en) | 1990-12-26 |
Family
ID=16515327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58205946A Granted JPS6098525A (en) | 1983-11-04 | 1983-11-04 | Magnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6098525A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2392621A2 (en) | 2010-06-01 | 2011-12-07 | FUJIFILM Corporation | Pigment dispersion composition, red colored composition, colored curable composition, color filter for a solid state imaging device and method for producing the same, and solid state imaging device |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61261817A (en) * | 1985-05-15 | 1986-11-19 | Konishiroku Photo Ind Co Ltd | Magnetic recording medium |
| JPS61261818A (en) * | 1985-05-15 | 1986-11-19 | Konishiroku Photo Ind Co Ltd | Magnetic recording medium |
| JPS623430A (en) * | 1985-06-27 | 1987-01-09 | Konishiroku Photo Ind Co Ltd | Magnetic recording medium |
| JPS623432A (en) * | 1985-06-28 | 1987-01-09 | Konishiroku Photo Ind Co Ltd | Magnetic recording medium |
| JPS623429A (en) * | 1985-06-28 | 1987-01-09 | Konishiroku Photo Ind Co Ltd | Magnetic recording medium |
| JPS62119725A (en) * | 1985-11-19 | 1987-06-01 | Konishiroku Photo Ind Co Ltd | Magnetic recording medium |
| JPS62134824A (en) * | 1985-12-07 | 1987-06-17 | Konishiroku Photo Ind Co Ltd | Magnetic recording medium |
| JPH0721550A (en) * | 1993-06-30 | 1995-01-24 | Tdk Corp | Magnetic recording medium and its production |
-
1983
- 1983-11-04 JP JP58205946A patent/JPS6098525A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2392621A2 (en) | 2010-06-01 | 2011-12-07 | FUJIFILM Corporation | Pigment dispersion composition, red colored composition, colored curable composition, color filter for a solid state imaging device and method for producing the same, and solid state imaging device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6098525A (en) | 1985-06-01 |
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