JPH0676270A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPH0676270A
JPH0676270A JP29462991A JP29462991A JPH0676270A JP H0676270 A JPH0676270 A JP H0676270A JP 29462991 A JP29462991 A JP 29462991A JP 29462991 A JP29462991 A JP 29462991A JP H0676270 A JPH0676270 A JP H0676270A
Authority
JP
Japan
Prior art keywords
magnetic layer
magnetic
magnetic recording
recording medium
haloalkylthio
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
Application number
JP29462991A
Other languages
Japanese (ja)
Inventor
Yoshiyuki Ikeda
祥行 池田
Akiko Oohara
亜紀子 大原
Takashi Mikawa
隆 三川
Junko Egawa
純子 江川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Kasei Corp
Original Assignee
Mitsubishi Kasei Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Kasei Corp filed Critical Mitsubishi Kasei Corp
Priority to JP29462991A priority Critical patent/JPH0676270A/en
Publication of JPH0676270A publication Critical patent/JPH0676270A/en
Pending legal-status Critical Current

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  • Magnetic Record Carriers (AREA)

Abstract

PURPOSE:To prevent the deterioration in the performance of a magnetic layer even in a bad environment at high temp. and humidity and to stably maintain magnetic characteristics over a long period of time by incorporating a haloalkylthio compd. into the magnetic layer. CONSTITUTION:A magnetic layer is formed on a nonmagnetic substrate and a haloalkylthio compd. is incorporated into the magnetic layer by 0.0001-1wt.%. The growth of mycelia of mold on the magnetic layer is prevented even being storaged in an environment fit for the growth of mold without affecting various characteristics of the resulting magnetic recording medium such as the electromagnetic characteristics, frictional characteristics and durability to continuous reproduction.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、磁気記録媒体に関し、
特にかび発生の問題が改善された磁気記録媒体に関す
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording medium,
In particular, the present invention relates to a magnetic recording medium in which the problem of mold development is improved.

【0002】[0002]

【従来の技術】非磁性支持体上に磁性層を設けてなる磁
気記録媒体は、近年、各種情報記録媒体として広く使用
されている。従来、磁気記録媒体は、その使用環境上か
らも、かびの菌糸が発育して磁性層に障害を与えるとは
考えられておらず、磁性層中に防かび剤を添加すること
は特に行われていなかった。
2. Description of the Related Art In recent years, magnetic recording media having a magnetic layer provided on a non-magnetic support have been widely used as various information recording media. Conventionally, it has not been considered that fungal hyphae grow on the magnetic recording medium to damage the magnetic layer even from the environment of use, and it is particularly performed to add a fungicide to the magnetic layer. Didn't.

【0003】しかしながら、最近の磁気記録装置及び媒
体の急速な普及で使用環境に変化が生じ、かびの菌糸の
発育しやすい条件下での媒体使用が頻繁におこなわれる
ようになってきた。磁性層にかびの菌糸が発育した場
合、磁気記録媒体の表面性が劣化するだけでなく、ドロ
ップアウトを生じさせる原因となり信頼性が著しく損な
われる。
However, due to the recent rapid spread of magnetic recording devices and media, the use environment has changed, and media have come to be used frequently under conditions in which mold mycelia easily grow. When mold hyphae grow on the magnetic layer, not only the surface property of the magnetic recording medium is deteriorated, but also dropout is caused, and reliability is significantly impaired.

【0004】[0004]

【発明が解決しようとする課題】本発明者らは、磁気記
録媒体の電気磁気特性,摩擦特性、連続再生耐久性など
の諸特性に影響を与えず、かつ、かびの発育に適した環
境下で保存してもかびの菌糸の発育がない磁気記録媒体
を提供することを目的として鋭意検討した結果、本発明
に到達した。
DISCLOSURE OF INVENTION Problems to be Solved by the Invention The inventors of the present invention did not affect various characteristics of the magnetic recording medium, such as electromagnetic characteristics, frictional characteristics, and continuous reproduction durability, and under an environment suitable for mold growth. The present invention has been accomplished as a result of extensive studies aimed at providing a magnetic recording medium that does not cause the growth of mold hyphae even when preserved.

【0005】[0005]

【課題を解決するための手段】すなわち、本発明の要旨
は、非磁性支持体上に磁性層を設けてなる磁気記録媒体
において、磁性層中にハロアルキルチオ系化合物を0.
0001〜1重量%の範囲で含有することを特徴とする
磁気記録媒体に存する。以下、本発明を詳細に説明す
る。
That is, the gist of the present invention is to provide a magnetic recording medium comprising a non-magnetic support and a magnetic layer on which a haloalkylthio-based compound is added.
The magnetic recording medium is characterized by containing 0001 to 1% by weight. Hereinafter, the present invention will be described in detail.

【0006】本発明の磁気記録媒体は、磁性層にハロア
ルキルチオ系化合物を0.0001〜1重量%含有する
ことを特徴とする。ハロアルキルチオ系化合物として
は、N−(フルオロジクロロメチルチオ)−フタルイミ
ド、N−(フルオロジクロロエチルチオ)−フタルイミ
ド、N−(フルオロジクロロプロピルチオ)−フタルイ
ミド、N−(フルオロジクロロブチルチオ)−フタルイ
ミド、N,N−ジメチル−N’−フェニル−N’−フル
オロジクロロメチルチオスルファミド、N,N−ジメチ
ル−N’−フェニル−N’−フルオロジクロロエチルチ
オスルファミド、N,N−ジメチル−N’−フェニル−
N’−フルオロジクロロプロピルチオスルファミド、
N,N−ジメチル−N’−フェニル−N’−フルオロジ
クロロブチルチオスルファミドが好適に用いられる。こ
れらの化合物のうちN−(フルオロジクロロメチルチ
オ)−フタルイミド、N,N−ジメチル−N’−フェニ
ル−N’−フルオロジクロロメチルチオスルファミド
は、防かび効果が優れており、特に好ましい。
The magnetic recording medium of the present invention is characterized in that the magnetic layer contains 0.0001 to 1% by weight of a haloalkylthio compound. Examples of the haloalkylthio compound include N- (fluorodichloromethylthio) -phthalimide, N- (fluorodichloroethylthio) -phthalimide, N- (fluorodichloropropylthio) -phthalimide, N- (fluorodichlorobutylthio) -phthalimide, N, N-dimethyl-N'-phenyl-N'-fluorodichloromethylthiosulfamide, N, N-dimethyl-N'-phenyl-N'-fluorodichloroethylthiosulfamide, N, N-dimethyl-N '-Phenyl-
N'-fluorodichloropropylthiosulfamide,
N, N-dimethyl-N'-phenyl-N'-fluorodichlorobutylthiosulfamide is preferably used. Among these compounds, N- (fluorodichloromethylthio) -phthalimide and N, N-dimethyl-N'-phenyl-N'-fluorodichloromethylthiosulfamide are particularly preferable because they have excellent antifungal effect.

【0007】本発明で用いるハロアルキルチオ系化合物
は、磁性層中にイソシアネ−ト系硬化剤が用いられてい
る場合でも、イソシアネ−ト系硬化剤とは反応しないた
め、磁気記録媒体の諸特性を劣化させることが無い。磁
性層中へのハロアルキルチオ系化合物の含有量は、0.
0001重量%より少ないとかびの菌糸に対する育成阻
止能力が低下し、1重量%より多いと磁気記録媒体の諸
特性に悪影響を及ぼすことがあるため好ましくない。
The haloalkylthio compound used in the present invention does not react with the isocyanate hardener even when an isocyanate hardener is used in the magnetic layer. It does not deteriorate. The content of the haloalkylthio compound in the magnetic layer is 0.
If it is less than 0001% by weight, the growth inhibiting ability against mold hyphae is lowered, and if it is more than 1% by weight, various characteristics of the magnetic recording medium may be adversely affected, which is not preferable.

【0008】本発明の磁気記録媒体は、非磁性支持体上
に、例えば強磁性粉末、バインダ−樹脂等を有機溶媒に
混練分散した磁性塗布液を塗布し、乾燥することによっ
て磁性層を形成するにあたり、適当な方法で磁性層にハ
ロアルキルチオ系化合物を添加して製造される。ハロア
ルキルチオ系化合物を磁性層へ添加する方法は、特に限
定されないが、ハロアルキルチオ系化合物を強磁性粉
末、バインダ−樹脂等と一緒に有機溶媒に混練分散す
る、ハロアルキルチオ系化合物を有機溶媒中に溶か
し、強磁性粉末、バインダ−樹脂等を混練分散した磁性
塗布液に加え混ぜ合わせる、ハロアルキルチオ系化合
物を直接磁性塗布液に加え溶かし込む、ハロアルキル
チオ系化合物を磁性層に後から含浸させる、形成され
た磁性層に後からハロアルキルチオ系化合物を塗布する
等の方法を採用することができる。
The magnetic recording medium of the present invention forms a magnetic layer by coating a nonmagnetic support with a magnetic coating solution prepared by kneading and dispersing, for example, a ferromagnetic powder and a binder resin in an organic solvent, and drying. In this case, it is manufactured by adding a haloalkylthio compound to the magnetic layer by an appropriate method. The method for adding the haloalkylthio-based compound to the magnetic layer is not particularly limited, but the haloalkylthio-based compound is kneaded and dispersed in an organic solvent together with the ferromagnetic powder, the binder resin, etc., and the haloalkylthio-based compound is added to the organic solvent. Dissolve, add to a magnetic coating solution in which ferromagnetic powder, binder resin, etc. are kneaded and dispersed, mix, add a haloalkylthio compound directly to the magnetic coating solution and dissolve it, impregnate a magnetic layer with a haloalkylthio compound later, form A method such as applying a haloalkylthio-based compound to the formed magnetic layer later can be adopted.

【0009】強磁性粉末としては、磁気記録媒体の磁性
粉末として通常使用されているものが使用可能であり、
例えば、強磁性酸化鉄(γ−Fe23、Fe34、Co
含有γ−Fe23、Co含有Fe34、バリウムフェラ
イト等)、強磁性二酸化クロム、強磁性合金粉末(鉄、
コバルト、ニッケル及びこれらの合金等)あるいはこれ
らの混合物等の通常の磁気記録媒体に使用される磁性粉
末が挙げられる。また、磁性粉末の形状としても針状、
紡錘状、平板状等通常使用されるものを用いることがで
き、必要により各種形状のものを混合して使用してもよ
い。
As the ferromagnetic powder, those normally used as magnetic powder for magnetic recording media can be used.
For example, ferromagnetic iron oxide (γ-Fe 2 O 3 , Fe 3 O 4 , Co
Γ-Fe 2 O 3 containing, Fe 3 O 4 containing Co, barium ferrite, etc., ferromagnetic chromium dioxide, ferromagnetic alloy powder (iron,
Cobalt, nickel, alloys thereof, etc.) or a mixture thereof, etc., and magnetic powders used for ordinary magnetic recording media can be mentioned. In addition, the shape of the magnetic powder is needle-like,
A commonly used one such as a spindle shape or a flat plate shape may be used, and if necessary, various shapes may be mixed and used.

【0010】バインダ−樹脂としては、磁気記録媒体の
結合剤として従来から使用されているものが使用可能で
あり、例えば塩化ビニル−酢酸ビニル系共重合体やその
変成物、セルロ−ス誘導体、ポリウレタン、ブタジエン
系ゴム、ポリエステル、ポリアミド、アクリル系重合
体、エポキシ樹脂、フェノ−ル樹脂、ポリイソシアネ−
ト等またはこれらの混合物等が挙げられる。
As the binder resin, those conventionally used as binders for magnetic recording media can be used. For example, vinyl chloride-vinyl acetate copolymers and their modified products, cellulose derivatives, polyurethanes. , Butadiene rubber, polyester, polyamide, acrylic polymer, epoxy resin, phenol resin, polyisocyanate
Etc. or a mixture thereof and the like.

【0011】有機溶媒としては、通常磁気記録媒体の製
造に使用されるものであれば使用可能であり、例えばア
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、テトラヒドロフラン等のケトン
類、メタノ−ル、エタノ−ル、プロパノ−ル、ブタノ−
ル等のアルコ−ル類、酢酸メチル、酢酸エチル、酢酸ブ
チル、乳酸エチル、酢酸グリコ−ルモノエチルエ−テル
等のエステル類、エ−テル、グリコ−ル、ジメチルエ−
テル、グリコ−ルモノエチルエ−テルジオキサン等のグ
リコ−ルエ−テル類、ベンゼン、トルエン、キシレン等
の芳香族炭化水素、メチレンクロライド、エチレンクロ
ライド、四塩化炭素、クロロホルム、エチレンクロルヒ
ドリン、ジクロルベンゼン等の塩素化炭化水素等が挙げ
られる。
Any organic solvent can be used as long as it is usually used in the production of magnetic recording media. For example, ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, tetrahydrofuran, methanol, ethanol, etc. Le, propanol, butano
Alcohols such as alcohol, esters such as methyl acetate, ethyl acetate, butyl acetate, ethyl lactate, glycol acetate monoethyl ether, ether, glycol and dimethyl ether.
Tellurium, glycol ethers such as glycol monoethyl ether dioxane, aromatic hydrocarbons such as benzene, toluene, xylene, methylene chloride, ethylene chloride, carbon tetrachloride, chloroform, ethylene chlorohydrin, dichlorobenzene, etc. And the like.

【0012】さらに、磁性層には前記強磁性粉末、バイ
ンダ−樹脂、ハロアルキルチオ系化合物防かび剤の他
に、必要に応じて分散剤、研磨剤、潤滑剤、帯電防止剤
等の各種添加剤を含有してもよい。非磁性支持体として
は、通常磁気記録媒体に使用されるものであれば使用可
能であり、例えばポリエチレンテレフタレ−ト等のポリ
エステル類、ポリエチレン、ポリプロピレン等のポリオ
レフィン類、セルロ−ストリアセテ−ト等のセルロ−ス
誘導体、ポリ塩化ビニル、ポリ塩化ビニリデン等のビニ
ル系樹脂、ポリカ−ボネ−ト、ポリフェニレンサルファ
イド、ポリイミド、ポリアミド、ポリアミドイミド等の
プラスチック、紙、アルミニウム、銅等の金属、アルミ
ニウム合金、チタン合金等の軽金属、セラミックス等が
挙げられる。
Further, in the magnetic layer, in addition to the above-mentioned ferromagnetic powder, binder resin, haloalkylthio compound antifungal agent, if necessary, various additives such as dispersant, abrasive, lubricant, antistatic agent and the like. May be included. As the non-magnetic support, any of those usually used in magnetic recording media can be used, and examples thereof include polyesters such as polyethylene terephthalate, polyolefins such as polyethylene and polypropylene, and cellulose triacetate. Cellulose derivatives, vinyl-based resins such as polyvinyl chloride and polyvinylidene chloride, plastics such as polycarbonate, polyphenylene sulfide, polyimide, polyamide, polyamide-imide, paper, metals such as aluminum and copper, aluminum alloys, titanium Examples include light metals such as alloys and ceramics.

【0013】本発明の磁気記録媒体の形状としては、フ
ィルム、テ−プ、シ−ト、ディスク、カ−ド、ドラム等
のいずれでも良く、例えばビデオテ−プ、オ−ディオテ
−プ、デ−タストレ−ジテ−プ、フロッピ−ディスク、
磁気カ−ド、磁気ドラム等として使用可能である。
The shape of the magnetic recording medium of the present invention may be any of film, tape, sheet, disk, card, drum and the like, for example, video tape, audio tape, data tape. Taste storage tape, floppy disk,
It can be used as a magnetic card, a magnetic drum, or the like.

【0014】[0014]

【発明の効果】本発明によれば、磁気記録媒体の諸特性
に悪影響を及ぼすことなく、かつ、かびの菌糸に対する
育成阻止能力に優れた磁気記録媒体を提供することがで
きる。このため、本発明の磁気記録媒体は高温高湿下な
どの劣悪な環境したにおいてもその性能が低下すること
なく、長期間磁気特性を安定に維持することが可能であ
る。
According to the present invention, it is possible to provide a magnetic recording medium which does not adversely affect various characteristics of the magnetic recording medium and which has an excellent ability to inhibit growth of mold hyphae. Therefore, the magnetic recording medium of the present invention can maintain its magnetic characteristics stably for a long period of time without deteriorating its performance even in a bad environment such as high temperature and high humidity.

【0015】[0015]

【実施例】以下、本発明を実施例によりさらに詳細に説
明するが、本発明はその要旨を越えない限り、実施例に
より限定されるものではない。 実施例1 下記配合の組成物を混合分散して磁性塗料を製造し、7
5μm厚さのポリエチレンテレフタレ−トフィルム上に
均一に塗布、乾燥して、磁性層の厚さ2μmのシ−トを
得た。
EXAMPLES The present invention will be described in more detail with reference to examples below, but the present invention is not limited to the examples as long as the gist thereof is not exceeded. Example 1 A magnetic coating composition was prepared by mixing and dispersing the following composition.
A polyethylene terephthalate film having a thickness of 5 μm was uniformly applied and dried to obtain a sheet having a magnetic layer thickness of 2 μm.

【0016】 Co−γ−Fe23 100重量部 塩化ビニル−酢酸ビニル系共重合体とポリウレ タンエラストマ−との混合物 30重量部 N−(フルオロジクロロメチルチオ)−フタル イミド 0.002重量部 カ−ボンブラック 20重量部 酸化アルミニウム粉末 10重量部 燐酸エステル系分散剤 2重量部 ポリイソシアネ−ト系硬化剤 7重量部 メチルエチルケトン、シクロヘキサノン等の混 合物 400重量部 ステアリン酸エステル 10重量部 得られたシ−トを30×30mmに切断した後、アスペ
リギウスニガ−の菌糸を接種し、内部を蒸留水で湿した
プラスチックシャ−レに入れ、温度30℃、相対湿度9
5%の環境条件で8週間密閉保存した。なお、プラスチ
ックシャ−レは予め水で洗い、70容量%のアルコ−ル
に1時間浸して殺菌しておいたものを使用した。磁性層
のかびに対する耐性は、かびの菌糸の伸長を肉眼で観察
することにより、下記評価基準で評価した。評価基準 3:8週間経過後もシ−トの接種した部分に菌糸の発育
が認められないことを示す。 2:8週間経過時にシ−トの接種した部分に認められる
菌糸の発育部分の面積が、全面積の1/3を超えていな
いことを示す。 1:8週間経過迄にシ−トの接種した部分に認められる
菌糸の発育部分の面積が、全面積の1/3を超えたこと
を示す。
Co-γ-Fe 2 O 3 100 parts by weight Mixture of vinyl chloride-vinyl acetate copolymer and polyurethane urethane 30 parts by weight N- (fluorodichloromethylthio) -phthalimide 0.002 parts by weight -Bonblack 20 parts by weight Aluminum oxide powder 10 parts by weight Phosphate ester-based dispersant 2 parts by weight Polyisocyanate-based curing agent 7 parts by weight Mixture of methyl ethyl ketone, cyclohexanone, etc. 400 parts by weight Stearate ester 10 parts by weight -Cut into pieces of 30 x 30 mm, inoculated with mycelium of Aspergius niger, put in a plastic dish moistened with distilled water, temperature 30 ° C, relative humidity 9
It was sealed and stored for 8 weeks under 5% environmental conditions. The plastic chalet was previously washed with water and soaked in 70% by volume of alcohol for 1 hour for sterilization. The mold resistance of the magnetic layer was evaluated by the following evaluation criteria by observing the growth of fungal hyphae with the naked eye. Evaluation Criterion 3: Shows that no hyphal growth is observed in the sheet inoculated area even after 8 weeks. 2: Shows that the area of the hypha developing portion observed in the sheet inoculated portion after 8 weeks has not exceeded 1/3 of the total area. 1: Indicates that the area of the hypha developing portion observed in the sheet-inoculated portion by 8 weeks exceeded 1/3 of the total area.

【0017】また、得られたシ−トを直径3.5インチ
のド−ナツ状に打ち抜き、磁気記録媒体を製造して連続
再生耐久性試験をおこなった。連続再生耐久性試験は、
温度45℃、相対湿度80%の環境にて7時間保持し、
5時間かけて温度5℃、相対湿度50%の環境とし、こ
の環境を7時間保持しさらに5時間かけて最初の環境に
戻すという合計24時間を1サイクルとする周期的環境
変化のもとで行い、下記評価基準で評価した。評価基準 ○:1000時間経過後も磁気記録媒体上で傷の発生が
認められなかったことを示す。 ×:1000時間経過迄に磁気記録媒体上で傷の発生が
認められたことを示す。
Further, the obtained sheet was punched into a donut shape having a diameter of 3.5 inches to manufacture a magnetic recording medium, and a continuous reproduction durability test was conducted. Continuous reproduction durability test
Hold for 7 hours in the environment of temperature 45 ℃, relative humidity 80%,
Under a cyclical environmental change with a cycle of 5 hours, a temperature of 5 ° C and a relative humidity of 50%, holding this environment for 7 hours, and then returning it to the initial environment for 5 hours, for a total of 24 hours. The evaluation was performed according to the following evaluation criteria. Evaluation Criteria ◯: Indicates that no scratch was found on the magnetic recording medium even after 1000 hours. Poor: Indicates that scratches were found on the magnetic recording medium by the lapse of 1000 hours.

【0018】結果を表1に示す。 実施例2 N−(フルオロジクロロメチルチオ)−フタルイミドの
添加量を0.2重量部としたこと以外は実施例1と同様
にしてシ−ト及び磁気記録媒体を製造し、同様に試験を
行なった。結果を表1に示す。 実施例3 N−(フルオロジクロロメチルチオ)−フタルイミドの
代わりにN,N−ジメチル−N’−フェニル−N’−フ
ルオロジクロロメチルチオスルファミドを0.004重
量部添加したこと以外は実施例1と同様にしてシ−ト及
び磁気記録媒体を製造し、同様に試験を行なった。結果
を表1に示す。 比較例1 N−(フルオロジクロロメチルチオ)−フタルイミドを
添加しなかったこと以外は実施例1と同様にしてシ−ト
及び磁気記録媒体を製造し、同様に試験を行なった。結
果を表1に示す。 比較例2 N−(フルオロジクロロメチルチオ)−フタルイミドの
添加量を3.0重量部としたこと以外は実施例1と同様
にしてシ−ト及び磁気記録媒体を製造し、同様に試験を
行なった。結果を表1に示す。 比較例3 N−(フルオロジクロロメチルチオ)−フタルイミドの
代わりに、カルボニル系化合物の防かび剤α−ブロモシ
ンナムアルデヒト(構造式;Ph−CH=C(Br)CH
O;式中、Phはフェニル基を示す。)を用いたこと以外
は実施例1と同様にしてシ−ト及び磁気記録媒体を製造
し、同様に試験を行なった。結果を表1に示す。
The results are shown in Table 1. Example 2 A sheet and a magnetic recording medium were manufactured in the same manner as in Example 1 except that the amount of N- (fluorodichloromethylthio) -phthalimide added was 0.2 parts by weight, and the same test was conducted. . The results are shown in Table 1. Example 3 As Example 1 except that 0.004 parts by weight of N, N-dimethyl-N′-phenyl-N′-fluorodichloromethylthiosulfamide was added instead of N- (fluorodichloromethylthio) -phthalimide. Sheets and magnetic recording media were manufactured in the same manner and tested in the same manner. The results are shown in Table 1. Comparative Example 1 A sheet and a magnetic recording medium were manufactured in the same manner as in Example 1 except that N- (fluorodichloromethylthio) -phthalimide was not added, and the same test was conducted. The results are shown in Table 1. Comparative Example 2 A sheet and a magnetic recording medium were manufactured and tested in the same manner as in Example 1 except that the amount of N- (fluorodichloromethylthio) -phthalimide added was 3.0 parts by weight. . The results are shown in Table 1. Comparative Example 3 Instead of N- (fluorodichloromethylthio) -phthalimide, a fungicide α-bromocinnamaldecht (structure formula; Ph-CH = C (Br) CH) of a carbonyl compound was used.
O: In the formula, Ph represents a phenyl group. The sheet and the magnetic recording medium were manufactured in the same manner as in Example 1 except that (1) was used, and the same test was performed. The results are shown in Table 1.

【0019】[0019]

【表1】 [Table 1]

【0020】表1から明らかなように、ハロアルキルチ
オ系化合物を磁性層に添加しなかった場合は、かびの菌
糸に対する育成阻止能力が低く、菌糸の発育に適した環
境、すなわち高温度、高湿度、環境下での磁気記録媒体
の信頼性に問題がある。さらに、ハロアルキルチオ系化
合物ではなくカルボニル系化合物の防かび剤を添加した
場合は、磁性層中のイソシアネ−ト系硬化剤と反応して
しまうため、磁気記録特性を劣化する。また、磁性層へ
のハロアルキルチオ系化合物の添加量が多すぎると連続
再生耐久性が劣化する。
As is clear from Table 1, when the haloalkylthio compound was not added to the magnetic layer, the growth inhibiting ability against mold hyphae was low, and the environment was suitable for the growth of hyphae, that is, high temperature and high humidity. However, there is a problem in the reliability of the magnetic recording medium under the environment. Furthermore, if a fungicide of a carbonyl compound rather than a haloalkylthio compound is added, it reacts with the isocyanate hardener in the magnetic layer, deteriorating the magnetic recording characteristics. Further, if the amount of the haloalkylthio compound added to the magnetic layer is too large, the continuous reproduction durability deteriorates.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 江川 純子 神奈川県横浜市緑区鴨志田町1000番地 三 菱化成株式会社総合研究所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Junko Egawa 1000, Kamoshida-cho, Midori-ku, Yokohama-shi, Kanagawa Sanryo Kasei Co., Ltd.

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 非磁性支持体上に磁性層を設けてなる磁
気記録媒体において、磁性層中にハロアルキルチオ系化
合物を0.0001〜1重量%の範囲で含有することを
特徴とする磁気記録媒体。
1. A magnetic recording medium comprising a magnetic layer provided on a non-magnetic support, wherein the magnetic layer contains a haloalkylthio compound in an amount of 0.0001 to 1% by weight. Medium.
【請求項2】 磁性層中にイソシアネ−ト系硬化剤を含
むことを特徴とする請求項1記載の磁気記録媒体。
2. The magnetic recording medium according to claim 1, wherein the magnetic layer contains an isocyanate hardener.
JP29462991A 1991-11-11 1991-11-11 Magnetic recording medium Pending JPH0676270A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP29462991A JPH0676270A (en) 1991-11-11 1991-11-11 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP29462991A JPH0676270A (en) 1991-11-11 1991-11-11 Magnetic recording medium

Publications (1)

Publication Number Publication Date
JPH0676270A true JPH0676270A (en) 1994-03-18

Family

ID=17810235

Family Applications (1)

Application Number Title Priority Date Filing Date
JP29462991A Pending JPH0676270A (en) 1991-11-11 1991-11-11 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPH0676270A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09101926A (en) * 1995-10-04 1997-04-15 Daihatsu Motor Co Ltd Information transmitter and information receiver

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09101926A (en) * 1995-10-04 1997-04-15 Daihatsu Motor Co Ltd Information transmitter and information receiver

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