JPS5885924A - Magnetic recording medium - Google Patents
Magnetic recording mediumInfo
- Publication number
- JPS5885924A JPS5885924A JP18225381A JP18225381A JPS5885924A JP S5885924 A JPS5885924 A JP S5885924A JP 18225381 A JP18225381 A JP 18225381A JP 18225381 A JP18225381 A JP 18225381A JP S5885924 A JPS5885924 A JP S5885924A
- Authority
- JP
- Japan
- Prior art keywords
- vinyl
- vinyl chloride
- copolymer
- magnetic recording
- 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.)
- Granted
Links
- 229920001577 copolymer Polymers 0.000 claims abstract description 28
- 239000006247 magnetic powder Substances 0.000 claims abstract description 21
- 238000010521 absorption reaction Methods 0.000 claims abstract description 14
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000011230 binding agent Substances 0.000 claims abstract description 11
- 239000000178 monomer Substances 0.000 claims abstract description 11
- 229920005989 resin Polymers 0.000 claims abstract description 8
- 239000011347 resin Substances 0.000 claims abstract description 8
- 238000000862 absorption spectrum Methods 0.000 claims abstract description 4
- 229920002803 thermoplastic polyurethane Polymers 0.000 claims abstract description 3
- 229920001971 elastomer Polymers 0.000 claims abstract 6
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims abstract 2
- 229920002554 vinyl polymer Polymers 0.000 claims description 22
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 14
- 229920001567 vinyl ester resin Polymers 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims description 7
- -1 alkyl carboxylic acid Chemical class 0.000 claims description 7
- 239000000470 constituent Substances 0.000 claims 1
- 238000003490 calendering Methods 0.000 abstract description 10
- 150000002148 esters Chemical class 0.000 abstract description 3
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 abstract description 2
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 abstract description 2
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 abstract description 2
- 239000011976 maleic acid Substances 0.000 abstract description 2
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 abstract description 2
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 abstract 1
- 125000005599 alkyl carboxylate group Chemical group 0.000 abstract 1
- UIWXSTHGICQLQT-UHFFFAOYSA-N ethenyl propanoate Chemical compound CCC(=O)OC=C UIWXSTHGICQLQT-UHFFFAOYSA-N 0.000 abstract 1
- 125000005670 ethenylalkyl group Chemical group 0.000 abstract 1
- KSEBMYQBYZTDHS-HWKANZROSA-N ferulic acid Chemical compound COC1=CC(\C=C\C(O)=O)=CC=C1O KSEBMYQBYZTDHS-HWKANZROSA-N 0.000 abstract 1
- 239000000654 additive Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 6
- 230000009477 glass transition Effects 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 230000000996 additive effect Effects 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 229920005749 polyurethane resin Polymers 0.000 description 4
- 229920000459 Nitrile rubber Polymers 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 3
- 235000014113 dietary fatty acids Nutrition 0.000 description 2
- 239000002270 dispersing agent Substances 0.000 description 2
- UKMSUNONTOPOIO-UHFFFAOYSA-N docosanoic acid Chemical compound CCCCCCCCCCCCCCCCCCCCCC(O)=O UKMSUNONTOPOIO-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229930195729 fatty acid Natural products 0.000 description 2
- 239000000194 fatty acid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- JNYAEWCLZODPBN-JGWLITMVSA-N (2r,3r,4s)-2-[(1r)-1,2-dihydroxyethyl]oxolane-3,4-diol Chemical class OC[C@@H](O)[C@H]1OC[C@H](O)[C@H]1O JNYAEWCLZODPBN-JGWLITMVSA-N 0.000 description 1
- HMEGGKJXNDSHHA-TYYBGVCCSA-N (e)-but-2-enedioic acid;2-methylprop-2-enoic acid Chemical compound CC(=C)C(O)=O.OC(=O)\C=C\C(O)=O HMEGGKJXNDSHHA-TYYBGVCCSA-N 0.000 description 1
- 235000021357 Behenic acid Nutrition 0.000 description 1
- IMROMDMJAWUWLK-UHFFFAOYSA-N Ethenol Chemical compound OC=C IMROMDMJAWUWLK-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- 229920002433 Vinyl chloride-vinyl acetate copolymer Polymers 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 229940116226 behenic acid Drugs 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 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
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000000463 material Substances 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
- 235000021317 phosphate Nutrition 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- 238000007127 saponification reaction Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004381 surface treatment Methods 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
- G11B5/702—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 bonding agent
Landscapes
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は磁気記録媒体に関し、％に表面性が向上し、カ
レンダー加工が容易で、高域感度が向上し１さらに高温
高温時の保存性と走行性が良好な磁気記録媒体に関する
。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic recording medium, which has improved surface properties by 1%, is easy to calender, has improved high-range sensitivity, and has good storage stability and runnability at high temperatures. Regarding recording media.
従来から塩化ビニル−酢酸ビニル−ビニルアル；−ル共
重合体が磁気テープバインダー用樹脂として広く使用さ
れてきた。Conventionally, vinyl chloride-vinyl acetate-vinyl alcohol copolymers have been widely used as resins for magnetic tape binders.
この塩化ビニル−酢酸ビニル−ビニルアルコール共重合
体としては米国０００社の商品名＠ＶＡＧＨ”が代表的
なもので、日本のメーカーも塩化ビニル−酢酸ビニル−
ビニルアルコールの比率を９１≦−５％−６−に統一し
て生産している。この共重合体は、比較的安価であるこ
と、溶剤に溶は易いこと、他の樹脂との相客性が良いこ
と、またその分子中にある水酸基のために磁性粉末と良
く親和してその分散性を良くすること岬の利点を有し、
％に分散性が良いために配向度１最大残留磁束書度など
の優れた磁気特性をもたらしている。しかし近年罠なっ
て磁性粉が微粒子化されこれらの樹脂でもかならずしも
分散性が満足出来なくなりこの型の共重体において水酸
基の量を増加した方向で検討した結果、分散性には、赤
外吸収スペクトルのＯＨ／ＣＨの吸収比で（Ｌ７以上に
なるまでＯＨを導入すると適当である事は明確となった
。A typical example of this vinyl chloride-vinyl acetate-vinyl alcohol copolymer is the product name @VAGH" manufactured by 000 companies in the United States, and Japanese manufacturers also sell vinyl chloride-vinyl acetate-vinyl alcohol copolymers.
It is produced with a uniform vinyl alcohol ratio of 91≦-5%-6-. This copolymer is relatively inexpensive, easily soluble in solvents, has good compatibility with other resins, and has good affinity with magnetic powder due to the hydroxyl group in its molecules. It has the advantage of having good dispersibility,
%, it provides excellent magnetic properties such as an orientation degree of 1 and a maximum residual magnetic flux density. However, in recent years, magnetic powders have become fine particles, and even these resins cannot always satisfy the dispersibility.As a result of considering increasing the amount of hydroxyl groups in this type of copolymer, we found that the dispersibility is affected by the infrared absorption spectrum. It became clear that it is appropriate to introduce OH until the absorption ratio of OH/CH reaches (L7 or higher).
しかしこの水酸基の量を増大した共重合体はそのガラス
転移温度が７０℃位と高く、そのために表面加工しＫ＜
＜％にカレンダー加工性が悪く、従って磁性層のカレン
ダー加工後の表面性が向上しにくいという欠点がある。However, this copolymer with an increased amount of hydroxyl groups has a high glass transition temperature of around 70°C, so surface treatment is required for K<
<%, the calendering properties are poor, and therefore the surface properties of the magnetic layer after calendering are difficult to improve.
従って、この分散性を改良した塩化ビニル−酢酸ビニル
−ビニルアルコール共重合体よりなるバインダーは１磁
性層における磁性粉末の分散性及び磁性層表面の平滑鏡
面性の両面から見れば、必ずしも−足できるものと言う
ことができない。即ち、塩化ビニル−酢酸ビニル−ビニ
ルアルコール共重合体は磁性粉末の分散性の藺では良好
であると言えるけれども、磁性層のカレンダー加工後の
表面性が劣るという欠点を有する。Therefore, a binder made of a vinyl chloride-vinyl acetate-vinyl alcohol copolymer with improved dispersibility is not necessarily sufficient from the viewpoint of both the dispersibility of the magnetic powder in one magnetic layer and the smooth specularity of the surface of the magnetic layer. I can't say anything. That is, although the vinyl chloride-vinyl acetate-vinyl alcohol copolymer can be said to have good dispersibility in magnetic powder, it has the disadvantage that the surface properties of the magnetic layer after calendering are poor.
この点にかんがみ、本発明者等は先きにバインダーとし
て上記塩化ビニル−酢酸ビニル−ビニルアルコール共重
合体瞠対してガラス転移点を６５℃以下に下げた樹脂成
分を混合させることにより、磁性粉末の分散性を損わな
いで鍬膜の表面性を向上し、カレンダー加工後の光沢度
の向上をしうろことを見出した（特願昭５６−９４０１
６号等）。In view of this point, the present inventors first mixed, as a binder, a resin component with a glass transition point lowered to 65°C or lower with respect to the above-mentioned vinyl chloride-vinyl acetate-vinyl alcohol copolymer. It has been found that the surface properties of the hoe film can be improved without impairing the dispersibility of the film, and the gloss after calendering can be improved (Japanese Patent Application No. 56-9401).
No. 6, etc.).
ところが今度は、ガラス転移点が低いため、高温高湿の
条件下での保存性及び走行性が低下することが分った。However, this time, it was found that due to the low glass transition point, the storage stability and runnability under high temperature and high humidity conditions deteriorated.
従って、本発明は上記の欠点のない磁気記録媒体を提供
することを目的とする。It is therefore an object of the present invention to provide a magnetic recording medium that does not have the above-mentioned drawbacks.
本発明は、塩化ビニル、アルキルカルボン酸ビニルエス
テル、塩化ビニルと共重合可能な単量体、及ヒアルキル
カルボン酸ビニルエステルのケン化物を構成成分とする
共重合体であって、その赤外吸収スペクトルのＯＨ／
ＣＩ（吸収比がα２〜１７のものを使用するととによっ
て、カレンダー加工後の光沢度の向上、さらに高温高湿
時の磁気テープの保存、走行性が安定化できた。これは
ケン化物を少めＫおさえることによりガラス転移点の上
昇をおさえると共に、ケン化物の減少で磁性粉の分散性
が低下するのを塩化ビニルと共重合可能な単量体で補う
ととにより達成されたものである。The present invention relates to a copolymer comprising vinyl chloride, an alkyl carboxylic acid vinyl ester, a monomer copolymerizable with vinyl chloride, and a saponified product of a hyalkyl carboxylic acid vinyl ester, the infrared absorption of which is Spectrum OH/
By using CI (with an absorption ratio of α2 to 17), the gloss after calendering was improved, and the storage and running properties of the magnetic tape at high temperatures and high humidity were stabilized. This was achieved by suppressing the increase in the glass transition point by suppressing the amount of K, and by compensating for the decrease in the dispersibility of the magnetic powder due to the decrease in saponified substances with a monomer that can be copolymerized with vinyl chloride. .
本発明で使用される共重合体は種々の方法で製造し５る
。例えば塩化ビニル−アルキルカルボン酸ビニル共重合
体をケン化することにより塩化ビニル−アルキルカルボ
ン酸ビニル共重合体のケン化物とし、さらに上記ケン化
した共重合体に塩化ビニルと共１合しうる単量体を反応
させるなどである。他の任意の方法によることも可能で
ある。The copolymers used in the present invention can be produced by various methods. For example, by saponifying a vinyl chloride-vinyl alkylcarboxylate copolymer, a saponified product of vinyl chloride-vinyl alkylcarboxylate copolymer is obtained, and then the saponified copolymer is added with a monomer capable of co-merging with vinyl chloride. For example, reacting molecules. Any other method is also possible.
本発明で使用されるアルキルカルボン酸ビニルエステル
及びそのケン化物としては酢酸ビニル１プロピオン酸ビ
ニル、バーサチック酸ビニル、及び七〇ケン化物等があ
る。また本発明で使用される塩化ビニルと共重合可能な
単量体としては１マレイン酸、フマール酸−メタクリル
酸、それらのエステル類−アクリル酸及びそのエステル
類がある。また上記リケン化（典盤的には塩化ビニル−
アルキルカルボン酸ビニル共重合体のケン化）の際には
１ガラス転移点の低下を行う一方で磁性粉の分散性の低
下への影響を成る程度おさえる必要から前述のように赤
外吸収スペクトルのＯＨ／ＣＨ吸収比をα２〜（Ｌ７に
する必要がある。なおここで示す赤外吸収のＯＨ１に収
は５４５０ｃｍａ 、ＣＨ吸収は２９５０ｃｓ−”で
あり、ＯＨ／ＣＨはその強度比である。The alkylcarboxylic acid vinyl esters and their saponified products used in the present invention include vinyl acetate-1 propionate, vinyl versatate, and saponified products thereof. Monomers copolymerizable with vinyl chloride used in the present invention include monomaleic acid, fumaric acid-methacrylic acid, esters thereof-acrylic acid, and esters thereof. In addition, the above-mentioned resaponification (typically vinyl chloride-
When saponifying a vinyl alkylcarboxylate copolymer, it is necessary to lower the glass transition point by 1 while minimizing the effect on the dispersibility of the magnetic powder, so as mentioned above, the infrared absorption spectrum It is necessary to set the OH/CH absorption ratio to α2~(L7.The infrared absorption shown here has an OH1 yield of 5450 cma, a CH absorption of 2950 cs-'', and OH/CH is the intensity ratio thereof.
上記共重合体を構成する単量体は、塩化ビニル５０〜９
０重量襲、アルキルカルゼン酸ビニルエステｋ ５ 釉
４０重量襲、塩化ビニルと共１合可能な他の単量体１５
〜１０重量≦、および残部アルキル禽ルボン酸ビニルエ
ステルケン化物の範囲で用いれば所期の効果が達成でき
ることが分った。The monomer constituting the above copolymer is vinyl chloride 50-9
0 weight range, alkylcarzenate vinylester K 5 Glaze 40 weight range, other monomers that can be combined with vinyl chloride 15
It has been found that the desired effect can be achieved if the weight range is 10 to 10% by weight, and the remainder is a saponified alkyl carboxylic acid vinyl ester.
本発明の第一の具体的例においては、かかる共重合体と
アクリｐニトリルブタジエンゴふとよりなるバインダー
で磁性粉末を支持体上に固着してなる磁気記録媒体が提
供される。第二の具体例においてはかかる共重合体とウ
レターン樹脂とよりなるバインダーで磁性粉末を支持体
上に固着してなる磁気記録媒体が提供される。In a first embodiment of the present invention, a magnetic recording medium is provided in which magnetic powder is fixed on a support with a binder made of such a copolymer and acryl p-nitrile butadiene rubber. In a second embodiment, a magnetic recording medium is provided in which magnetic powder is fixed on a support with a binder made of such a copolymer and a urethane resin.
°本発明に使用可能なポリウレタン樹脂としては、その
代表的なものは１日本ボリクレタン社製のニッポ５ ン
２５０４ 、＝ツボ’） ７２ Ｓ Ｏ１、＝ツボラン
５０２２、エツポツン５０５５％バツプレン２２８（い
ずれも商品名）など、米国グツドリッチ社製のニステン
５７０１％ニステン５７０２、ニステン５７０ Ｓｓ
ニス、テン５７１１、ニステン５７１５、ニステン５
７１７（いずれも商品名）、大日本インキ社製のクリス
ボン４２１４、クリスボン４ｓｏ７、クリスボン７２０
テ、’ｌ’−５０００、Ｔ −５００９、？ −５０１
０ｓ Ｔ ” ５１０２ 、Ｔ−５２０５、ｓ２６ｏＭ
ｒ（いずれも商品名）、タイセル化学社製のＥム−２５
４ｓＸム−２５５、Ｅム−２５６、プラクセル２０５、
ブックセル２０８、プラクセル２１２、プラクセル２５
Ｇ、ブックセル２４０１プラクセル３ｏｓｓブツク竜ル
Ｓ Ｏ５、ブック−に＃５０８ＳプツクセＪ／ Ｓ ２
０ ｓダックセル３３０（いずれも商品名）、成田薬品
工業製のＴ＝ １０４０％ ］Ｃ５ｓｏ（いずれも商品
名）等がある。又ニトリルゴムとしては日本イオン社製
のハイカー１０４２、ハイカー１ｏ５２、ハイカー１０
７２、ハイカー１５１２、ハイカー１４３２、ハイカー
１０４５．ハイカー１ｏ５３（いずれも商品名）等があ
る。Typical polyurethane resins that can be used in the present invention are 1 Nippon Polyurethane Co., Ltd.'s Nippon 2504, = Tsubo') 72 S O1, = Tsubo Lan 5022, Etsupotun 5055% Batsuplen 228 (both products) Nisten 5701% Nisten 5702, Nisten 570 Ss manufactured by Gutdrich, USA
Varnish, Ten 5711, Nisten 5715, Nisten 5
717 (all product names), Krisbon 4214, Krisbon 4so7, Krisbon 720 manufactured by Dainippon Ink Co., Ltd.
Te, 'l'-5000, T-5009,? -501
0s T” 5102, T-5205, s26oM
r (both trade names), Emu-25 manufactured by Taisel Kagaku Co., Ltd.
4sX Mu-255, Em-256, Praxel 205,
Bookcell 208, Praxel 212, Praxel 25
G, Booksel 2401 Plaxel 3oss Book Dragon Le S O5, Book - #508S Putsukuse J/S 2
Examples include 0s Duckcel 330 (all trade names), T=1040% ]C5so (all trade names) manufactured by Narita Pharmaceutical Industries, Ltd. Also, as nitrile rubber, Hiker 1042, Hiker 1o52, Hiker 10 manufactured by Nippon Aeon Co., Ltd.
72, Hiker 1512, Hiker 1432, Hiker 1045. Hiker 1o53 (all product names), etc.
以下、比較例と鵜に実施例を挙げて本発明を例示する。Hereinafter, the present invention will be illustrated by giving comparative examples and examples.
ポリウレタン樹脂にツボ９ｙ１５０５５）４〜１６ｊｌ
添加剤 ｏｇ〜２０９磁
性粉（ｒ−ｙｅ、ｏ、 ） １２０〜２ｏ
ｏｙ比較例２−
４〜２４１
添加剤 ０〜２０ＪＩ研マ
剤 ＩＩ〜５１磁性粉Ｃｒ−
Ｆｅ１ｏ、 ＞ １２０〜２０ ＯＮ比
較例５
８１１〜１１５ＩＩ
ポリウレタン樹脂（二ツボラン＋２ｓｏａ＞ ４
Ａ−２４ｙ添加剤 。〜
４り磁性粉（ｒ−、ｙｅ、 Ｏｓ ） １
ｚｏ 〜２ｏｏｙ研ｉ剤 ０
〜１ｏ１！注（１） 括弧内の吸収比で示されるケン
化物を含む５元共重合体である。Acupoint 9y15055) 4-16jl on polyurethane resin
Additives og~209 Magnetic powder (r-ye, o, ) 120~2o
oy Comparative Example 2- 4-241 Additives 0-20 JI polishing agent II-51 Magnetic powder Cr-
Fe1o, > 120-20 ON Comparative Example 5 811-115II Polyurethane resin (Futoboran + 2soa> 4
A-24y additive. ~
4 magnetic powder (r-, ye, Os) 1
zo ~2ooy abrasive 0
~1o1! Note (1) It is a 5-component copolymer containing a saponified product indicated by the absorption ratio in parentheses.
（２）括弧内のマレイン酸量な含む６元共重合体である
。(2) A six-component copolymer containing an amount of maleic acid is shown in parentheses.
実施例１
添加剤 ロ 〜２０Ｉｉ
研マ１ｌｌＪ ｏ
〜２０Ｊｌ磁性粉末Ｃｒ−Ｆｅｗ Ｏｓ ）
１２０〜２００１実施例２
磁性粉末（Ｃｏ１ｙ −ｒｅ、 ｏ、 ）Ｋ 変更、あ
とは実施例１と同組成
１６１１〜５４１
アクリ謬ニトリルブタジェンゴムにツボール１４５２）
４１〜２１
添加剤 ０〜４０ｊ研！
剤 Ｄ〜２０ｊＦ磁性粉末＜
ｒ−ｖｅ、 ０８ ） １２ ［１〜２０
ｏｐｌ ６〜５６１
ポリウレタン樹脂にツボラ／≠２３０４） ４ 〜
２４９添加剤 ◎ 〜４０
１研マ剤 ｇ −ａ口ｌ磁性
＠ （ｒ−ｙｅ、 Ｏ，） １２０〜２
００実施例５
磁性粉（００％ ｒ−ｒｅ、 ＯＨ） Ｋ変更、あと
は実施例４と同組成
注（３）括弧内に示す吸収比で示されるケン化物と括弧
内に示す単量体量を含む４元共重合体である。Example 1 Additive B ~20Ii
Kenma1llJ o
~20Jl magnetic powder Cr-Few Os)
120-2001 Example 2 Magnetic powder (Co1y-re, o, )K changed, the rest had the same composition as Example 1 1611-541 Acrylic nitrile butadiene rubber with tweezers 1452)
41~21 Additive 0~40j sharp!
Agent D~20jF magnetic powder<
r-ve, 08) 12 [1-20
opl 6~561 Polyurethane resin with polyurethane/≠2304) 4~
249 additive ◎ ~40
1 Polishing agent g -a mouth l magnetic @ (r-ye, O,) 120~2
00 Example 5 Magnetic powder (00% r-re, OH) K changed, the rest is the same composition as Example 4 Note (3) Saponified product shown by absorption ratio shown in parentheses and monomer amount shown in parentheses It is a quaternary copolymer containing
なお、本発明で用いる共重合体の調製は種々の成分比の
塩化ビニル−酢酸ビール共重合体から出発し【行うこと
ができる。例えば実施例１の共重合体は塩化ビニル：酢
酸ビニル４：４ｓ６：２及び８５：１５（重量比）の塩
化ビニル−酢酸ビニル共重合体に種々の割合でケン化処
瑠及び単量体の共重合を行うことで調製することができ
る。The copolymers used in the present invention can be prepared starting from vinyl chloride-beer acetate copolymers having various component ratios. For example, the copolymer of Example 1 is a vinyl chloride-vinyl acetate copolymer of vinyl chloride:vinyl acetate 4:4s6:2 and 85:15 (weight ratio), which is treated with saponification treatment and monomers in various proportions. It can be prepared by copolymerization.
上記比較例１の組成において、磁性塗料をつくり、それ
を支持体上に塗布した結果の表面性及びカレンダー加工
後の表面性を第１図に示す。一方実施例１の組成につい
ても同様に第１図に示す。In the composition of Comparative Example 1 above, a magnetic coating material was prepared and the surface properties as a result of coating it on a support and the surface properties after calendering are shown in FIG. On the other hand, the composition of Example 1 is also shown in FIG.
図において実線が塗布後の光沢度で、点線がカレンダー
加工後の光沢度である。このグラフより明Ｖ 確なよ
５ Ｋ ＯＨ／ＣＨ吸収比が増加すれば塗布後の光沢が
上昇する。又逆にカレンダー後の光沢はガラス転移点の
関係からＯＨ／ ＣＨ吸収比が多くなると低下して行く
。一方！レイン酸を含む塩化ビニル−酢酸ビニル系バイ
ンダーは単にケン化しただけのより塗布上がりの光沢度
がすぐれカレンダー加工後の光沢度もＯＨ／ＣＨ吸収比
が吸収幅α７だとすぐれている。なお比較例３は実施例
１と同様な結果をもたらす。In the figure, the solid line is the gloss after coating, and the dotted line is the gloss after calendering. It is clear from this graph that as the 5K OH/CH absorption ratio increases, the gloss after coating increases. Conversely, the gloss after calendering decreases as the OH/CH absorption ratio increases due to the glass transition point. on the other hand! A vinyl chloride-vinyl acetate binder containing leic acid has a higher gloss after coating than a binder that is simply saponified, and the gloss after calendering is also excellent when the OH/CH absorption ratio is in the absorption width α7. Note that Comparative Example 3 yields similar results to Example 1.
又比較例５、実施例４、実施例５をそれぞれテープ化後
高温高温下で保存稜ワク７ラツターを評価した。それか
ら６０℃、ＳＯ≦の環境下で走行した時の事故率を第１
表に示す。この表から明確なようにブレンドした組成は
高温高湿下ではテープの物理特性が悪くなる。In addition, after forming Comparative Example 5, Example 4, and Example 5 into tapes, the ridge wax 7 rattles were evaluated under high temperature conditions. Then, the accident rate when driving in an environment of 60℃ and SO≦ was the first.
Shown in the table. As is clear from this table, the blended composition deteriorates the physical properties of the tape under high temperature and high humidity conditions.
第 １ 表 上記の如く磁性粉末とし′ｃｙ−ｒｅ、Ｏ＠又はＣ。Table 1 As described above, the magnetic powder is cy-re, O@ or C.
被着γ−Ｆｅｚ ＯＨを用いて本発明を例示したが、そ
の他の磁性粉末として”ｓ０４、ｃｏ被着Ｆｅ、０４等
と合金等も同等に使用することができる。また添加剤（
分散剤、潤滑剤）としては、通常使用される脂肪酸（ン
リスチン酸、バルミチン酸、ステアリン酸、ベヘン酸）
、シリコーンオイル（ジメチルシロキサン）、帯電防止
剤（金属石けん、第四級アンモニウム塩）、分散剤（脂
肪酸エステル燐酸エステル、ソルビタンエステル、高級
アルコール）等を含めることができる。Although the present invention has been exemplified using the coated γ-Fez OH, other magnetic powders such as "S04", co-coated Fe, 04, etc., and alloys can be equally used.Additives (
Dispersants, lubricants) commonly used fatty acids (nristic acid, valmitic acid, stearic acid, behenic acid)
, silicone oil (dimethylsiloxane), antistatic agents (metallic soaps, quaternary ammonium salts), dispersants (fatty acid ester phosphates, sorbitan esters, higher alcohols), and the like.
４、 び の −
第１図は本発明による磁気記録媒体と従来の磁気記録媒
体との特性の差を表わすものである。4. Figure 1 shows the difference in characteristics between the magnetic recording medium according to the present invention and a conventional magnetic recording medium.
第２図・
ＯＨ／ＣＨｏ＆ｑｔｚ
手続補正層
昭和５７年１１Ｊ−］ ２４ ｆ’：１特許庁長官 若
杉和 夫 殿
事件の表示 昭和５６年 特願第１８２２５５ 号発
明の名称 磁気記録媒体
補正をする者
゛ド件との関係 特許出願人名称
（ｉｓ０６）東京電気化学工業株式会社代理人
電話２７３−６４３６番
氏 名 （６７８１） 弁理上 倉 内 基
弘゛同
住 所 同 、１−氏 名
（７５６３） 弁理士 倉 橋 暎二
： 。Figure 2: OH/CHo&qtz Procedural Correction Layer 1982, 11J-] 24 f':1 Indication of the case of Kazuo Wakasugi, Director General of the Japan Patent Office, 1982, Patent Application No. 182255, Title of the Invention Person who corrects magnetic recording media Relationship with patent case Name of patent applicant
(is06) Tokyo Denki Kagaku Kogyo Co., Ltd. Agent Phone Number: 273-6436 Name (6781) Patent Attorney Motoki Kurauchi
Same address as Hiroshima, 1-Name (7563) Patent attorney Eiji Kurahashi:.
補正の対象
明細書の発明の詳細な説明・図面の簡単な説明の欄図面
１通補正の、内容
別紙の通り
（１） 先きに提出した明細書中篇１１頁下から第５
・行に「示す、」とある次に、次の文を加入する。Column for detailed description of the invention and brief description of drawings in the specification to be amended Contents of one copy of the amendment
As attached (1) Section 5 from the bottom of page 11 of the middle part of the specification submitted earlier
- Add the following sentence next to the line that says "indicate."
「ただし図示のものは重量比で表わして磁性粉対値脂分
の比が４８１．塩化ビニル−酢酸ビニル系共１合体又は
塩化ビ品ループ讐ピオン酸ビニ／Ｉ／系共重合体対メリ
ウレタン樹脂の比が６＝４、添加剤（ソルビタン酸エス
デ＃）対磁性粉３：１００、及び研磨剤なしの組成であ
った。」
（２）明細書第１３頁下からｊｌ！！１行に「及び表」
とあるを削除します。However, in the case of the one shown in the figure, the ratio of magnetic powder to fat content is 481 in terms of weight ratio. The composition had a resin ratio of 6=4, an additive (Sorbitanate Esde #) to magnetic powder of 3:100, and no abrasive.'' (2) From the bottom of page 13 of the specification. ! "and table" in one line
Delete certain.
（３）図面中筒１及び２ｗｉを削除し、新たに添付の第
１１ｉ１１を加入します。(3) Delete drawing middle tubes 1 and 2wi and add newly attached No. 11i11.
Claims (3)
ステルと、塩化ビニルに対して共重合可能な他の単量体
と、アルキルカルボン酸ビニルエステルのケン化物とを
構成成分とする共重合体であってその赤！Ａ吸収スペク
トルのＯＨ／ ＣＨ吸収比が１２〜（Ｌ７の共重合体、
及びゴム系バインダーを樹脂成分とし、それに磁性粉末
を分−したものを支持体に固着して成る磁気記録媒体。(1) A copolymer comprising vinyl chloride, an alkylcarboxylic acid vinyl ester, another monomer copolymerizable with vinyl chloride, and a saponified product of the alkylcarboxylic acid vinyl ester as constituent components, That red! The OH/CH absorption ratio of the A absorption spectrum is 12~(L7 copolymer,
and a magnetic recording medium comprising a rubber-based binder as a resin component, mixed with magnetic powder, and fixed to a support.
ウレタン樹脂又はこれら両者である特許請求の範囲第１
項記載の磁気記録媒体。(2) The rubber binder is acrylonitrile rubber.
Claim 1 which is urethane resin or both
Magnetic recording medium described in Section 1.
０重量鳴、アルキルカルボン酸ビニルエステルは５〜４
０重量襲重量化ビニルと共重合可能な他の単量体はｔＯ
〜５．０重量襲、および残部が実質的にアルキルカルボ
ン酸エステルのケン化物である特許請求の範囲第１又は
＠２項記載の磁気記録媒体。(3) Vinyl chloride is 50 to 9 based on the copolymer.
0 weight sound, alkyl carboxylic acid vinyl ester is 5-4
Other monomers that can be copolymerized with zero weight vinyl are tO
2. The magnetic recording medium according to claim 1 or claim 2, wherein the magnetic recording medium has a weight ratio of 5.0 to 5.0, and the remainder is substantially a saponified product of an alkyl carboxylic acid ester.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18225381A JPS5885924A (en) | 1981-11-16 | 1981-11-16 | Magnetic recording medium |
| US06/544,804 US4460653A (en) | 1981-11-16 | 1983-10-24 | Magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18225381A JPS5885924A (en) | 1981-11-16 | 1981-11-16 | Magnetic recording medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5885924A true JPS5885924A (en) | 1983-05-23 |
| JPS6252363B2 JPS6252363B2 (en) | 1987-11-05 |
Family
ID=16115019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18225381A Granted JPS5885924A (en) | 1981-11-16 | 1981-11-16 | Magnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5885924A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60137969A (en) * | 1983-12-26 | 1985-07-22 | Nisshin Kagaku Kogyo Kk | Resin for magnetic coating film use and magnetic coating containing the same |
| JPS60223021A (en) * | 1984-04-19 | 1985-11-07 | Tdk Corp | Magnetic recording medium |
-
1981
- 1981-11-16 JP JP18225381A patent/JPS5885924A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60137969A (en) * | 1983-12-26 | 1985-07-22 | Nisshin Kagaku Kogyo Kk | Resin for magnetic coating film use and magnetic coating containing the same |
| JPS60223021A (en) * | 1984-04-19 | 1985-11-07 | Tdk Corp | Magnetic recording medium |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6252363B2 (en) | 1987-11-05 |
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