JPH0159645B2 - - Google Patents
Info
- Publication number
- JPH0159645B2 JPH0159645B2 JP15461779A JP15461779A JPH0159645B2 JP H0159645 B2 JPH0159645 B2 JP H0159645B2 JP 15461779 A JP15461779 A JP 15461779A JP 15461779 A JP15461779 A JP 15461779A JP H0159645 B2 JPH0159645 B2 JP H0159645B2
- Authority
- JP
- Japan
- Prior art keywords
- copolymer
- comparative example
- vinyl chloride
- gauss
- flux density
- 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
Links
- 229920001577 copolymer Polymers 0.000 claims description 21
- 230000005291 magnetic effect Effects 0.000 claims description 18
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 claims description 13
- OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical compound OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 claims description 9
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 8
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 8
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 7
- 229920002818 (Hydroxyethyl)methacrylate Polymers 0.000 claims description 6
- WOBHKFSMXKNTIM-UHFFFAOYSA-N Hydroxyethyl methacrylate Chemical compound CC(=C)C(=O)OCCO WOBHKFSMXKNTIM-UHFFFAOYSA-N 0.000 claims description 6
- 239000011230 binding agent Substances 0.000 claims description 6
- 230000005294 ferromagnetic effect Effects 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 230000000052 comparative effect Effects 0.000 description 19
- 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
- 230000004907 flux Effects 0.000 description 11
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 8
- 239000000203 mixture Substances 0.000 description 6
- 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 4
- 229910001566 austenite Inorganic materials 0.000 description 4
- 239000000787 lecithin Substances 0.000 description 4
- 229940067606 lecithin Drugs 0.000 description 4
- 235000010445 lecithin Nutrition 0.000 description 4
- 229920002545 silicone oil Polymers 0.000 description 4
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 4
- 239000006247 magnetic powder Substances 0.000 description 3
- 239000000696 magnetic material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229920001228 polyisocyanate Polymers 0.000 description 2
- 239000005056 polyisocyanate Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000004576 sand 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
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- 229910020598 Co Fe Inorganic materials 0.000 description 1
- 229910002519 Co-Fe Inorganic materials 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 1
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229920002301 cellulose acetate Polymers 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
Description
【発明の詳細な説明】
本発明は強磁性微粉末をバインダーと共に支持
体に塗布した磁気記録媒体に関する。この種の磁
気記録媒体は一般にセルロースアセテート、ポリ
エステル等の非磁性支持体を用いたものでバイン
ダーとしては従来より種々のものが使用されてい
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic recording medium in which fine ferromagnetic powder is coated on a support together with a binder. This type of magnetic recording medium generally uses a non-magnetic support such as cellulose acetate or polyester, and various binders have been used heretofore.
しかしながら未だ完全なものはなく、これらの
バインダーを使用する範囲では磁気記録媒体は充
分に満足のいく特性のものが得られていなかつ
た。 However, none of these binders are perfect, and magnetic recording media have not yet had sufficiently satisfactory characteristics to the extent that these binders have been used.
本発明者らは塩化ビニルを主体とする共重合体
について種々検討した結果、重量比で塩化ビニル
70〜95％、ヒドロキシエチルアクリレート又はヒ
ドロキシエチルメタアクリレート１〜25％、アク
リル酸又はメタアクリル酸0.5〜10％よりなる共
重合体を含有するバインダーで強磁性粉を支持体
に固着してなる磁気記録体が極めて優れた角型比
（Br／Bm）と最大残留磁束密度を持つ事を発見し
た。これらの共重合体の好ましい範囲はそれぞれ
85〜90％、５〜15％、0.5〜５％である。 As a result of various studies on copolymers mainly composed of vinyl chloride, the present inventors found that the weight ratio of vinyl chloride
70 to 95% hydroxyethyl acrylate or hydroxyethyl methacrylate, 1 to 25% hydroxyethyl methacrylate, and 0.5 to 10% acrylic acid or methacrylic acid. It was discovered that the recording medium has an extremely excellent squareness ratio (Br/Bm) and maximum residual magnetic flux density. The preferred range of each of these copolymers is
85-90%, 5-15%, 0.5-5%.
以下実施例によつて説明する。各実施例中
「部」は「重量部」を示す。 This will be explained below using examples. In each example, "parts" indicate "parts by weight."
実施例 １
磁性粉（γ−Fe2O3） 300ｇ
共重合体（塩化ビニル85％、ヒドロキシエチルア
クリレート10％、アクリル酸５％） 60ｇ
ウレタン樹脂 20ｇ
レシチン ２ｇ
シリコンオイル 1.5ｇ
メチルエチルケトン 400ｇ
トルエン 200ｇ
シクロヘキサノン 200ｇ
以上の組成物をボールミルで粗分散後サンドミ
ルで充分分散させ、ポリエチレンテレフタレート
に塗布し磁場配向させた。乾燥後カレンダーロー
ルを施し磁気テープとした。これらのテープの角
型比と最大残留磁束密度を測定したところそれぞ
れ0.82と1390ガウスであつた。Example 1 Magnetic powder (γ-Fe 2 O 3 ) 300g Copolymer (vinyl chloride 85%, hydroxyethyl acrylate 10%, acrylic acid 5%) 60g Urethane resin 20g Lecithin 2g Silicone oil 1.5g Methyl ethyl ketone 400g Toluene 200g Cyclohexanone 200g The above composition was roughly dispersed in a ball mill, thoroughly dispersed in a sand mill, applied to polyethylene terephthalate, and oriented in a magnetic field. After drying, a calendar roll was applied to obtain a magnetic tape. The squareness ratio and maximum residual magnetic flux density of these tapes were measured and found to be 0.82 and 1390 Gauss, respectively.
実施例 ２
磁性粉（γ−Fe2O3） 300ｇ
共重合体（塩化ビニル90％、ヒドロキシエチルメ
タアクリレート５％、メタアクリル酸５％）60ｇ
ウレタン樹脂 20ｇ
レシチン ２ｇ
シリコンオイル 1.5ｇ
メチルエチルケトン 400ｇ
トルエン 200ｇ
シクロヘキサノン 200ｇ
以上の組成物を実施例１と同様に処理して、測
定したところそれぞれ0.81、1380ガウスを得た。Example 2 Magnetic powder (γ-Fe 2 O 3 ) 300g Copolymer (90% vinyl chloride, 5% hydroxyethyl methacrylate, 5% methacrylic acid) 60g Urethane resin 20g Lecithin 2g Silicone oil 1.5g Methyl ethyl ketone 400g Toluene 200g A composition of 200 g or more of cyclohexanone was treated in the same manner as in Example 1 and measured to obtain 0.81 and 1380 Gauss, respectively.
実施例 ３
磁性粉（γ−Fe2O3） 300ｇ
共重合体（塩化ビニル87％、ヒドロキシエチルア
クリレート12.5％、アクリル酸0.5％） 60ｇ
ウレタン樹脂 20ｇ
レシチン ２ｇ
シリコンオイル 1.5ｇ
メチルエチルケトン 400ｇ
トルエン 200ｇ
シクロヘキサノン 200ｇ
以上の組成物を実施例１と同様にサンドミル工
程迄充分分散させ、最後にポリイソシアネート
（トリメチロールプロパン１モルとトルエンジイ
ソシアネート３モルの付加物）13ｇを加えて実施
例１と同様処理し評価したところ、角型比0.84、
最大残留磁束密度1400ガウスを得た。Example 3 Magnetic powder (γ-Fe 2 O 3 ) 300g Copolymer (vinyl chloride 87%, hydroxyethyl acrylate 12.5%, acrylic acid 0.5%) 60g Urethane resin 20g Lecithin 2g Silicone oil 1.5g Methyl ethyl ketone 400g Toluene 200g Cyclohexanone 200g The above composition was sufficiently dispersed through the sand mill step in the same manner as in Example 1, and finally 13 g of polyisocyanate (an adduct of 1 mole of trimethylolpropane and 3 moles of toluene diisocyanate) was added and treated in the same manner as in Example 1 for evaluation. However, the squareness ratio is 0.84,
A maximum residual magnetic flux density of 1400 Gauss was obtained.
実施例 ４
実施例１と同様テストに於て３成分共重合体の
塩化ビニル、ヒドロキシエチルアクリレート、メ
タアクリル酸の重量割合をそれぞれ75：22：２と
したものを使用して同様テストで角型比と最大残
留磁束密度を0.81、1250ガウスを得た。Example 4 In the same test as in Example 1, a three-component copolymer with a weight ratio of vinyl chloride, hydroxyethyl acrylate, and methacrylic acid of 75:22:2 was used, and a square shape was made in the same test. The ratio and maximum residual magnetic flux density were obtained to be 0.81 and 1250 Gauss.
実施例 ５
実施例１と同様テストで共重合体の塩化ビニ
ル、ヒドロキシエチルアクリレート、アクリル酸
の重量割合をそれぞれ77：14：９としたものを使
用して角型比と最大残留磁束密度を0.80、1210ガ
ウスを得た。Example 5 In the same test as in Example 1, a copolymer with a weight ratio of vinyl chloride, hydroxyethyl acrylate, and acrylic acid of 77:14:9 was used, and the squareness ratio and maximum residual magnetic flux density were set to 0.80. , obtained 1210 Gauss.
比較例 １
磁性体（γ−Fe2O3） 300ｇ
共重合体（塩化ビニル86％、酢酸ビニル13％、無
水マレイン酸１％） 60ｇ
ウレタン樹脂 20ｇ
レシチン ２ｇ
シリコンオイル 1.5ｇ
メチルエチルケトン 400ｇ
トルエン 200ｇ
シクロヘキサノン 200ｇ
以上の組成物を実施例１と同様に処理して測定
したところ角型比と最大残留磁束密度はそれぞれ
0.66、1050ガウスであつた。Comparative Example 1 Magnetic material (γ-Fe 2 O 3 ) 300g Copolymer (vinyl chloride 86%, vinyl acetate 13%, maleic anhydride 1%) 60g Urethane resin 20g Lecithin 2g Silicone oil 1.5g Methyl ethyl ketone 400g Toluene 200g Cyclohexanone 200g When the above composition was treated and measured in the same manner as in Example 1, the squareness ratio and maximum residual magnetic flux density were respectively
It was 0.66, 1050 Gauss.
比較例 ２
共重合体（塩化ビニリデン80％、アクリロニトリ
ル20％） 60ｇ
を比較例１の共重合体に代えて使用する以外は比
較例１と同じ組成物を用い実施例１と同様に処理
して測定したところ、角型比と最大残留磁束密度
はそれぞれ0.59、950ガウスであつた。Comparative Example 2 The same composition as in Comparative Example 1 was used and treated in the same manner as in Example 1, except that 60 g of copolymer (80% vinylidene chloride, 20% acrylonitrile) was used in place of the copolymer in Comparative Example 1. When measured, the squareness ratio and maximum residual magnetic flux density were 0.59 and 950 Gauss, respectively.
比較例 ３
共重合体（塩化ビニル60％、ヒドロキシエチルメ
タアクリレート27％、メタアクリル酸13％）60ｇ
を比較例１の共重合体に代えて使用する以外は比
較例１と同じ組成物を用いて実施例１と同様に処
理して測定したところ、角型比と最大残留磁束密
度はそれぞれ0.58、920ガウスであつた。Comparative Example 3 The same composition as Comparative Example 1 was used except that 60 g of copolymer (60% vinyl chloride, 27% hydroxyethyl methacrylate, 13% methacrylic acid) was used in place of the copolymer of Comparative Example 1. When processed and measured in the same manner as in Example 1, the squareness ratio and maximum residual magnetic flux density were 0.58 and 920 Gauss, respectively.
比較例 ４
共重合体（塩化ビニル40％、ヒドロキシエチルア
クリレート42％、アクリル酸18％） 60ｇ
をを比較例１の共重合体に代えて使用する以外は
比較例１と同様に処理して測定したところ、角型
比と残留磁束密度はそれぞれ0.61、930ガウスで
あつた。Comparative Example 4 Measured in the same manner as in Comparative Example 1 except that 60 g of copolymer (vinyl chloride 40%, hydroxyethyl acrylate 42%, acrylic acid 18%) was used in place of the copolymer of Comparative Example 1. As a result, the squareness ratio and residual magnetic flux density were 0.61 and 930 Gauss, respectively.
比較例 ５
共重合体（塩化ビニル40％、ヒドロキシエチルア
クリレート20％、アクリル酸40％） 60ｇ
を比較例１の共重合体に代えて使用する以外は比
較例１と同様に処理して測定したところ、角型比
と最大残留磁束密度はそれぞれ0.54、900ガウス
であつた。Comparative Example 5 Measurement was carried out in the same manner as in Comparative Example 1, except that 60 g of copolymer (40% vinyl chloride, 20% hydroxyethyl acrylate, 40% acrylic acid) was used in place of the copolymer of Comparative Example 1. However, the squareness ratio and maximum residual magnetic flux density were 0.54 and 900 Gauss, respectively.
比較例 ６
共重合体（塩化ビニル75％、ヒドロキシエチルメ
タアクリレート0.5％、メタアクリル酸20％）
60ｇ
を比較例１の共重合体に代えて使用する以外は比
較例１と同様に処理して測定したところ、角型比
は0.56、最大残留磁束密度は930ガウスであつた。Comparative Example 6 Copolymer (75% vinyl chloride, 0.5% hydroxyethyl methacrylate, 20% methacrylic acid)
The copolymer of Comparative Example 1 was treated in the same manner as in Comparative Example 1, except that 60 g of the copolymer was used in place of the copolymer of Comparative Example 1, and measurements were made. As a result, the squareness ratio was 0.56 and the maximum residual magnetic flux density was 930 Gauss.
本発明はこれらの実施例及び比較例に限定され
るものではないが、これらの実施例及び比較例か
らアクリル酸又メタアクリル酸の多い部分及びヒ
ドロキシエチルアクリレート（又はメタアクリレ
ート）が多い部分はポリマーの溶解性及び他樹脂
と相溶性が悪いことによつてバインダーとしては
不適である事が判る。 Although the present invention is not limited to these Examples and Comparative Examples, it is clear from these Examples and Comparative Examples that the portions containing a large amount of acrylic acid or methacrylic acid and the portions containing a large amount of hydroxyethyl acrylate (or methacrylate) are polymers. It is found that it is unsuitable as a binder due to its solubility and poor compatibility with other resins.
磁性体はその他にCo−Fe2O3、合金、CrO2、
Fe3O4その他が使用でき、またその他の樹脂成分
（たとえば、ポリウレタン樹脂）も必要により併
用することができる。更に、硬化剤成分としてポ
リイソシアネート類を加えると耐磨耗性の向上も
見られた。 Other magnetic materials include Co-Fe 2 O 3 , alloy, CrO 2 ,
Fe 3 O 4 and others can be used, and other resin components (for example, polyurethane resin) can also be used in combination if necessary. Furthermore, when polyisocyanates were added as a curing agent component, abrasion resistance was also improved.
Claims (1)
チルアクリレート又はヒドロキシエチルメタアク
リレート１〜25％、アクリル酸又はメタアクリル
酸0.5〜10％より成る共重合体を含有するバイン
ダーで強磁性粉を支持体に固着してなる磁気記録
媒体。1 Supporting ferromagnetic powder with a binder containing a copolymer consisting of 70-95% vinyl chloride, 1-25% hydroxyethyl acrylate or hydroxyethyl methacrylate, and 0.5-10% acrylic acid or methacrylic acid by weight. A magnetic recording medium that is adhered to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15461779A JPS5677930A (en) | 1979-11-29 | 1979-11-29 | Magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15461779A JPS5677930A (en) | 1979-11-29 | 1979-11-29 | Magnetic recording medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5677930A JPS5677930A (en) | 1981-06-26 |
| JPH0159645B2 true JPH0159645B2 (en) | 1989-12-19 |
Family
ID=15588090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15461779A Granted JPS5677930A (en) | 1979-11-29 | 1979-11-29 | Magnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5677930A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60235814A (en) * | 1984-05-08 | 1985-11-22 | Nippon Zeon Co Ltd | Resin for magnetic paint |
| JPH0721850B2 (en) * | 1985-04-19 | 1995-03-08 | 積水化学工業株式会社 | Binder for magnetic recording media |
| JPS6273416A (en) * | 1985-09-26 | 1987-04-04 | Sekisui Chem Co Ltd | Binder for magnetic recording body |
| BR8705574A (en) * | 1986-10-20 | 1988-05-24 | Union Carbide Corp | VINYL CHLORIDE COPOLIMER SUITABLE TO BE USED AS A BINDING RESIN FOR PARTICULAR MATERIAL; AND MAGNETIC RECORDING MEDIA |
-
1979
- 1979-11-29 JP JP15461779A patent/JPS5677930A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5677930A (en) | 1981-06-26 |
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