JPH02198026A - Magnetic recording medium - Google Patents
Magnetic recording mediumInfo
- Publication number
- JPH02198026A JPH02198026A JP1692589A JP1692589A JPH02198026A JP H02198026 A JPH02198026 A JP H02198026A JP 1692589 A JP1692589 A JP 1692589A JP 1692589 A JP1692589 A JP 1692589A JP H02198026 A JPH02198026 A JP H02198026A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- magnetic layer
- recording medium
- magnetic recording
- ester compound
- 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
- 125000000217 alkyl group Chemical group 0.000 claims abstract description 6
- 125000003342 alkenyl group Chemical group 0.000 claims abstract description 4
- -1 ester compound Chemical class 0.000 claims description 19
- 125000004432 carbon atom Chemical group C* 0.000 claims description 2
- 239000000314 lubricant Substances 0.000 abstract description 11
- 239000006247 magnetic powder Substances 0.000 abstract description 9
- 239000011230 binding agent Substances 0.000 abstract description 8
- 150000002148 esters Chemical class 0.000 abstract description 6
- 229920006267 polyester film Polymers 0.000 abstract 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 229920000728 polyester Polymers 0.000 description 4
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 229920002635 polyurethane Polymers 0.000 description 3
- 239000004814 polyurethane Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 2
- 235000014113 dietary fatty acids Nutrition 0.000 description 2
- 239000000194 fatty acid Substances 0.000 description 2
- 229930195729 fatty acid Natural products 0.000 description 2
- 150000004665 fatty acids Chemical class 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- OEPOKWHJYJXUGD-UHFFFAOYSA-N 2-(3-phenylmethoxyphenyl)-1,3-thiazole-4-carbaldehyde Chemical compound O=CC1=CSC(C=2C=C(OCC=3C=CC=CC=3)C=CC=2)=N1 OEPOKWHJYJXUGD-UHFFFAOYSA-N 0.000 description 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- FIPWRIJSWJWJAI-UHFFFAOYSA-N Butyl carbitol 6-propylpiperonyl ether Chemical compound C1=C(CCC)C(COCCOCCOCCCC)=CC2=C1OCO2 FIPWRIJSWJWJAI-UHFFFAOYSA-N 0.000 description 1
- 229920001747 Cellulose diacetate Polymers 0.000 description 1
- 229920002284 Cellulose triacetate Polymers 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000001856 Ethyl cellulose Substances 0.000 description 1
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical compound CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 description 1
- 229910017061 Fe Co Inorganic materials 0.000 description 1
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 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 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229920000180 alkyd Polymers 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 125000004429 atom Chemical group 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000005886 esterification reaction Methods 0.000 description 1
- 229920001249 ethyl cellulose Polymers 0.000 description 1
- 235000019325 ethyl cellulose Nutrition 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229940057995 liquid paraffin Drugs 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- BARWIPMJPCRCTP-UHFFFAOYSA-N oleic acid oleyl ester Natural products CCCCCCCCC=CCCCCCCCCOC(=O)CCCCCCCC=CCCCCCCCC BARWIPMJPCRCTP-UHFFFAOYSA-N 0.000 description 1
- 125000001117 oleyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])/C([H])=C([H])\C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- BARWIPMJPCRCTP-CLFAGFIQSA-N oleyl oleate Chemical compound CCCCCCCC\C=C/CCCCCCCCOC(=O)CCCCCCC\C=C/CCCCCCCC BARWIPMJPCRCTP-CLFAGFIQSA-N 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
- 229960005235 piperonyl butoxide Drugs 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 229920002689 polyvinyl acetate Polymers 0.000 description 1
- 239000011118 polyvinyl acetate Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000012756 surface treatment agent Substances 0.000 description 1
- 125000002889 tridecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
Landscapes
- Lubricants (AREA)
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、磁気テープ、磁気ディスク及び磁気ドラム等
の磁気記録媒体、詳しくは、磁性層に特定のエステル化
合物を含有させることによって、特に耐久性を向上させ
た磁気記録媒体に関する。Detailed Description of the Invention [Industrial Field of Application] The present invention provides magnetic recording media such as magnetic tapes, magnetic disks, and magnetic drums, and more particularly, a magnetic recording medium such as a magnetic tape, a magnetic disk, and a magnetic drum. The present invention relates to a magnetic recording medium with improved properties.
磁気記録媒体が具備すべき重要なファクターである耐久
性及び電磁変換特性を向上させるためには、磁性層の耐
久性を向上させることが重要である。In order to improve durability and electromagnetic conversion characteristics, which are important factors that a magnetic recording medium should have, it is important to improve the durability of the magnetic layer.
磁性層の耐久性が不十分であると、磁気記録媒体を繰返
し使用した際に、磁性層の一部が剥がれて磁気ヘッドに
付着し、ヘッドを汚したり、ヘッドの目詰まり等を原因
とする出力の低下や摩擦係数の上昇等が起こり、磁気記
録媒体の耐久性が損なわれ、その結果電磁変換特性も悪
化する。If the durability of the magnetic layer is insufficient, when a magnetic recording medium is used repeatedly, part of the magnetic layer may peel off and adhere to the magnetic head, staining the head or causing head clogging. This causes a decrease in output, an increase in the coefficient of friction, etc., impairing the durability of the magnetic recording medium, and as a result, the electromagnetic conversion characteristics also deteriorate.
そこで、これらの対策の一手段として、従来より、磁性
層に潤滑剤を添加する方法が行われており、潤滑剤とし
ては、脂肪酸、オレイン酸オレイル、ステアリン酸ブト
キシド、脂肪酸アミド、流動パラフィン、ワックス等が
用いられている。Therefore, as a measure against these problems, a method of adding a lubricant to the magnetic layer has traditionally been used.Lubricants include fatty acids, oleyl oleate, butoxide stearate, fatty acid amides, liquid paraffin, and wax. etc. are used.
〔発明が解決しようとする課題）
しかしながら、上述の潤滑剤を添加しても、磁性層の耐
久性を充分に向上させることはできず、潤滑剤のＩｌ類
によってはバインダーとの相溶性が悪く、磁性層の表面
からブリードしてヘッドを汚す等の欠点がある。[Problems to be Solved by the Invention] However, even if the above-mentioned lubricant is added, the durability of the magnetic layer cannot be sufficiently improved, and some lubricants have poor compatibility with the binder. However, there are drawbacks such as bleeding from the surface of the magnetic layer and contaminating the head.
従って、本発明の目的は、磁性層に添加する潤滑剤の選
定により、耐久性の充分に向上した磁気記録媒体を提供
することにある。Therefore, an object of the present invention is to provide a magnetic recording medium whose durability is sufficiently improved by selecting a lubricant to be added to the magnetic layer.
本発明者らは、鋭意研究した結果、磁性層に添加する潤
滑剤として特定のエステル化合物を用いることにより、
前記目的が達成されることを知見した。As a result of intensive research, the present inventors found that by using a specific ester compound as a lubricant added to the magnetic layer,
It has been found that the above objectives are achieved.
本発明は、上記知見に基づきなされたもので、非磁性支
持体上に磁性層を形成してなる磁気記録媒体において、
上記磁性層中に、下記一般弐で表されるエステル化合物
を含有させたことを特徴とする磁気記録媒体を提供する
ものである。The present invention has been made based on the above findings, and provides a magnetic recording medium in which a magnetic layer is formed on a non-magnetic support.
The present invention provides a magnetic recording medium characterized in that the magnetic layer contains an ester compound represented by the general formula 2 below.
（上式中、Ｒ，、Ｒ，、Ｒｓ及びＲ４は、各々独立して
、炭素数３〜１８の直鎖若しくは分岐の、アルキル基又
はアルケニル基を示す、）以下、本発明の磁気記録媒体
について詳述する。(In the above formula, R, , R, , Rs and R4 each independently represent a linear or branched alkyl group or alkenyl group having 3 to 18 carbon atoms.) Hereinafter, the magnetic recording medium of the present invention will be described. I will explain in detail.
先ず、磁性層に含有させる前記−最式で表されるエステ
ル化合物について詳述すると、Ｒ，、Ｒ，。First, the ester compound represented by the formula -R, which is contained in the magnetic layer, will be described in detail.
Ｒ１及びＲ４で示されるアルキル基としては、ノルマル
ブチル、２−エチルへキシル、トリデシル、ステアリル
等が挙げられ、アルケニル基としては、オレイル等が挙
げられ、これらは全て同一のものでも異なるものでも良
い。Examples of the alkyl group represented by R1 and R4 include normal butyl, 2-ethylhexyl, tridecyl, stearyl, etc., and examples of the alkenyl group include oleyl, etc., and these may all be the same or different. .
前記一般式で表されるエステル化合物は、その製造法に
制限はなく、例えば、Ｒ，、Ｒ，、Ｒ，及びＲ４がアル
キル基のエステル化合物は、シクロベンクンテトラカル
ボン酸に過剰量のアルキルアルコールを加え、触媒の共
存下に加熱反応させ、生成する水を反応系外に除去する
通常のエステル化反応により得ることができる。このエ
ステル化合物の製造の詳細は、特開昭５７−１７０９４
８号公報に記載されている。There are no restrictions on the manufacturing method of the ester compound represented by the above general formula. For example, an ester compound in which R, R, R, and R4 are alkyl groups is prepared by adding an excess amount of alkyl to cyclobencunetetracarboxylic acid. It can be obtained by a normal esterification reaction in which an alcohol is added, a heating reaction is carried out in the presence of a catalyst, and the produced water is removed from the reaction system. Details of the production of this ester compound are disclosed in JP-A No. 57-17094.
It is described in Publication No. 8.
前記一般式で表されるエステル化合物の添加量は、磁性
粉末１００重量部に対し、好ましくは０１１〜１０重量
部、より好ましくは０．５〜７重量部である。The amount of the ester compound represented by the above general formula added is preferably 0.11 to 10 parts by weight, more preferably 0.5 to 7 parts by weight, based on 100 parts by weight of the magnetic powder.
前記一般式で表されるエステル化合物は、この種の磁性
層に従来用いられている潤滑剤と併用可能である。The ester compound represented by the above general formula can be used in combination with a lubricant conventionally used in this type of magnetic layer.
本発明の磁気記録媒体の磁性層は、上記エステル化合物
の他に、磁性粉末及びバインダーを含有する。The magnetic layer of the magnetic recording medium of the present invention contains magnetic powder and a binder in addition to the above-mentioned ester compound.
上記磁性粉末としては、その種類は特に制限されず、例
えば、針状形の微細な７ ＦｅｚＯ３，Ｆｅ５Ｏａ。The type of magnetic powder is not particularly limited, and examples thereof include needle-shaped fine 7 FezO3 and Fe5Oa.
Ｃｒ０１のような金属酸化物、Ｃｏ被着ｒ Ｆｅｚｅ
ｓ、Ｃｏドープγ−Ｆｅ１０３のような加工処理を施し
たＴＦｅ、０３ 、鉄粉、微小板状のバリウムフェライ
ト及びそのＦｅ原子の一部が？＋＋Ｃｏ＋Ｚｎ＋Ｖ＋Ｎ
ｂ等の１種又は２種以上で置換された磁性粉、Ｃｏ ＋
Ｆ ｅ −Ｃｏ ＋ Ｐ ｅ −Ｎ ＋等の金属又は
合金の超微粉等が挙げられる。Metal oxides such as Cr01, Co-deposited r Feze
s, TFe processed such as Co-doped γ-Fe103, 03, iron powder, barium ferrite in the form of microplates and some of its Fe atoms? ++Co+Zn+V+N
Magnetic powder substituted with one or more of b, etc., Co +
Examples include ultrafine powder of metal or alloy such as Fe-Co+Pe-N+.
また、上記バインダーとしては、例えば、ポリウレタン
、ポリエステル、ポリ塩化ビニル、塩化ビニル／酢酸ビ
ニル共重合体、塩化ビニル／酢酸ビニル／ポリビニルア
ルコール共重合体、ポリアクリルニトリル、ニトリルゴ
ム、エポキシ樹脂、アルキッド樹脂、ポリアミド、ポリ
アクリル酸エステル、ポリメタクリル酸エステル、ポリ
酢酸ビニル、ポリビニルブチラール、塩化ビニリデン、
硝化綿、マレイン酸変性塩化ビニル／酢酸ビニル共重合
体、エチルセルロース等が挙げられ、これらの樹脂を単
独又は２種以上混合して用いられる。Examples of the binder include polyurethane, polyester, polyvinyl chloride, vinyl chloride/vinyl acetate copolymer, vinyl chloride/vinyl acetate/polyvinyl alcohol copolymer, polyacrylonitrile, nitrile rubber, epoxy resin, alkyd resin. , polyamide, polyacrylic ester, polymethacrylic ester, polyvinyl acetate, polyvinyl butyral, vinylidene chloride,
Examples include nitrified cotton, maleic acid-modified vinyl chloride/vinyl acetate copolymer, and ethyl cellulose, and these resins may be used alone or in combination of two or more.
上記バインダーの使用量は、前記磁性粉末１００重量部
に対し１０〜５０重量部が好ましい。The amount of the binder used is preferably 10 to 50 parts by weight per 100 parts by weight of the magnetic powder.
更に、本発明の磁気記録媒体の磁性層には、前記一般式
で表されるエステル化合物、前記磁性粉末及び前記バイ
ンダーの他に、この種の磁性層に通常含有される添加剤
、例えば、通常の潤滑剤、研潜剤、帯電防止剤、可塑剤
、硬化剤、分散剤、表面処理剤等を添加することができ
る。Furthermore, in addition to the ester compound represented by the general formula, the magnetic powder, and the binder, the magnetic layer of the magnetic recording medium of the present invention contains additives normally contained in this type of magnetic layer, such as Lubricants, abrasive agents, antistatic agents, plasticizers, curing agents, dispersants, surface treatment agents, etc. can be added.
また、本発明の磁気記録媒体の非磁性支持体としては、
例えば、ポリエチレンテレフタレート（ＰＥＴ）のよう
なポリエステル：ポリエチレン、ポリプロピレン等のポ
リオレフィン；セルローストリアセテート、セルロース
ジアセテート等のセルロース誘導体；ポリカーボネート
；ポリ塩化ビニル；ポリイミド；芳香族ポリアミド等の
プラスチックや、ＡＩ、Ｃｕ等の金属二紙等が挙げられ
、これらの支持体の表面をコロナ放電、放射線、紫外線
等で処理したもの或いは適当な樹脂でプレコートしたも
のを用いることもできる。この非磁性支持体の形態は、
フィルム、テープ、シート、ディスク、カード、ドラム
等、何れの形態でも良い。Further, as the non-magnetic support of the magnetic recording medium of the present invention,
For example, polyesters such as polyethylene terephthalate (PET); polyolefins such as polyethylene and polypropylene; cellulose derivatives such as cellulose triacetate and cellulose diacetate; polycarbonate; polyvinyl chloride; polyimide; plastics such as aromatic polyamide; AI, Cu, etc. These supports whose surfaces have been treated with corona discharge, radiation, ultraviolet rays, etc. or pre-coated with an appropriate resin can also be used. The form of this non-magnetic support is
It may be in any form such as a film, tape, sheet, disk, card, or drum.
本発明の磁気記録媒体は、例えば次のようにして製造す
ることができる。The magnetic recording medium of the present invention can be manufactured, for example, as follows.
先ず、前記磁性粉末及び前記バインダーを前記の割合で
配合し、更に必要に応じ各種の前記添加剤を加えた配合
物を常法により溶剤と混合した後、混合物に前記一般式
で表されるエステル化合物を前記の割合で添加混合して
、磁性塗料を調製する。First, the above-mentioned magnetic powder and the above-mentioned binder are blended in the above-mentioned proportions, and the mixture, in which various above-mentioned additives are added as necessary, is mixed with a solvent by a conventional method, and then the ester represented by the above general formula is added to the mixture. A magnetic coating material is prepared by adding and mixing the compounds in the above proportions.
次いで、この塗料を前記非磁性支持体上に常法により塗
布乾燥して、前記非磁性支持体上に磁性層の形成された
本発明の磁気記録媒体を得る。Next, this paint is applied onto the non-magnetic support by a conventional method and dried to obtain the magnetic recording medium of the present invention in which a magnetic layer is formed on the non-magnetic support.
尚、前記一般式で表されるエステル化合物は、磁性粉末
とバインダーとの混合時にそれらと一緒に配合しても差
し支えない。Incidentally, the ester compound represented by the above general formula may be blended together with the magnetic powder and the binder at the time of mixing them.
以下に本発明の実施例及び比較例を挙げ、本発明を更に
詳細に説明する。EXAMPLES The present invention will be explained in more detail by giving Examples and Comparative Examples of the present invention below.
実施例１〜５及び比較例１〜４
下記塗料配合の配合物を混合後、混合物に下記第１表に
示す潤滑剤をそれぞれ下記第１表に示す量添加混合して
、磁性塗料をそれぞれ調製した。Examples 1 to 5 and Comparative Examples 1 to 4 After mixing the following paint compositions, the lubricants shown in Table 1 below were added to the mixture in the amounts shown in Table 1 below to prepare magnetic paints. did.
次いで、各塗料を、１４μｍ厚のポリエステルベースフ
ィルム上に乾燥膜厚が４μｍになるように塗布乾燥して
、ポリエステルベースフィルム上に磁性層の形成された
磁気記録媒体をそれぞれ得た。Next, each coating material was applied onto a polyester base film having a thickness of 14 μm and dried to a dry film thickness of 4 μm to obtain magnetic recording media each having a magnetic layer formed on the polyester base film.
得られた各磁気記録媒体を２分の１インチ幅にスリット
後、記録再生装置にそれぞれ装填し、温度２０°Ｃ及び
湿度６５％の条件下スチル状態にセットし、初期の出力
が３ｄＢ低下する迄の時間を測定して、各磁気記録媒体
のスチル耐久性を評価した。After slitting each of the obtained magnetic recording media into 1/2 inch width, each was loaded into a recording/reproducing device and set in a still state at a temperature of 20°C and humidity of 65%, and the initial output was reduced by 3 dB. The still durability of each magnetic recording medium was evaluated by measuring the time taken.
その結果を下記第１表に示す。The results are shown in Table 1 below.
一塗↑１己合
ＣＯ被着ｙ ＦｅｚＯ１ｔｏｏ重量部ＶＡＧＨ”＋
１５ ＃ニラポ
ラン２３０４” １５ Ｉα−Ａ１□０，
５〃
カーボンブラック ５ “コロネートし
Ｉ３ ３ 〃メチルエチルケトン
１００ 〃トルエン １００
＃シクロへキサノン １００
（註）＊ｌ：ユニオンカーバイド社製の塩化ビニル／酢
酸ビニル／ポリビニルアルコ
ール共重合体
＊２；日本ポリウレタン工業１１製のポリウレタン樹脂
＊３：日本ポリウレタン工業■製のトリノチロールブロ
パントリイソシアナー
ト
第１表
（註）＊ｌ；実施例１〜５及び比較例１で用いたエステ
ル化合物は、下記一般式で表されるエステル化合物であ
り、上記第１表には、下記一般式中のＲ１−Ｒ４で示さ
れる基を表示した。One coating ↑ 1 self-coating CO adhesion y FezO1too weight part VAGH”+
15 #Nilaporan 2304” 15 Iα-A1□0,
5 Carbon black 5 “Coronate I3 3 Methyl ethyl ketone
100 Toluene 100
#Cyclohexanone 100 (Note) *l: Vinyl chloride/vinyl acetate/polyvinyl alcohol copolymer manufactured by Union Carbide *2; Polyurethane resin manufactured by Nippon Polyurethane Kogyo 11 *3: Trinotyrol bromine manufactured by Nippon Polyurethane Kogyo ■ Pantriisocyanate Table 1 (Note) *l: The ester compounds used in Examples 1 to 5 and Comparative Example 1 are ester compounds represented by the following general formula; The groups represented by R1 to R4 in the formula are shown.
上記第１表に示す結果から、実施例１〜５の本発明の磁
気記録媒体は、比較例のものに比して、スチル耐久性が
著しく向上していることが判る。From the results shown in Table 1 above, it can be seen that the magnetic recording media of Examples 1 to 5 of the present invention have significantly improved still durability compared to those of the comparative examples.
本発明の磁気記録媒体は、耐久性が充分に向上したもの
である。The magnetic recording medium of the present invention has sufficiently improved durability.
Claims (1)
おいて、上記磁性層中に、下記一般式で表されるエステ
ル化合物を含有させたことを特徴とする磁気記録媒体。 ▲数式、化学式、表等があります▼ （上式中、Ｒ＿１、Ｒ＿２、Ｒ＿３及びＲ＿４は、各々
独立して、炭素数３〜１８の直鎖若しくは分岐の、アル
キル基又はアルケニル基を示す。）[Claims] A magnetic recording medium comprising a magnetic layer formed on a non-magnetic support, characterized in that the magnetic layer contains an ester compound represented by the following general formula. Medium. ▲There are mathematical formulas, chemical formulas, tables, etc.▼ (In the above formula, R_1, R_2, R_3 and R_4 each independently represent a linear or branched alkyl group or alkenyl group having 3 to 18 carbon atoms.)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1692589A JPH02198026A (en) | 1989-01-26 | 1989-01-26 | Magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1692589A JPH02198026A (en) | 1989-01-26 | 1989-01-26 | Magnetic recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02198026A true JPH02198026A (en) | 1990-08-06 |
Family
ID=11929702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1692589A Pending JPH02198026A (en) | 1989-01-26 | 1989-01-26 | Magnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02198026A (en) |
-
1989
- 1989-01-26 JP JP1692589A patent/JPH02198026A/en active Pending
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