JPS6255211B2 - - Google Patents
Info
- Publication number
- JPS6255211B2 JPS6255211B2 JP23963683A JP23963683A JPS6255211B2 JP S6255211 B2 JPS6255211 B2 JP S6255211B2 JP 23963683 A JP23963683 A JP 23963683A JP 23963683 A JP23963683 A JP 23963683A JP S6255211 B2 JPS6255211 B2 JP S6255211B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- powder
- recording medium
- magnetic layer
- tin
- 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
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 13
- 239000000843 powder Substances 0.000 claims description 9
- 239000006247 magnetic powder Substances 0.000 claims description 3
- 239000000696 magnetic material Substances 0.000 claims 1
- 239000007789 gas Substances 0.000 description 6
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 229910001566 austenite Inorganic materials 0.000 description 3
- 239000006229 carbon black Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N Methyl ethyl ketone Natural products CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 150000003949 imides Chemical class 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 1
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 1
- JRLTTZUODKEYDH-UHFFFAOYSA-N 8-methylquinoline Chemical group C1=CN=C2C(C)=CC=CC2=C1 JRLTTZUODKEYDH-UHFFFAOYSA-N 0.000 description 1
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 1
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 1
- 239000005642 Oleic acid Substances 0.000 description 1
- 229910006404 SnO 2 Inorganic materials 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 229920002433 Vinyl chloride-vinyl acetate copolymer Polymers 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000010574 gas phase reaction Methods 0.000 description 1
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 229920001228 polyisocyanate Polymers 0.000 description 1
- 239000005056 polyisocyanate Substances 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Landscapes
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
Description
本発明は磁気記録媒体に関するものであり、優
れた耐摩耗性と帯電防止能を備えた磁性層を有す
る磁気記録媒体を提供する。
一般に磁気記録媒体はポリエステルなどの非磁
性の基材上に有機バインダー中に分散した磁性粉
末（γ―Fe2O3、Co被覆γ―Fe2O3、Fe、等）を
塗布してつくられるが、記録媒体は記録、再生時
に磁気ヘツドなどに激しく接触するために磁性層
が摩耗しやすく、耐摩耗性に優れたものが要求さ
れている。また磁性層は静電気を帯びやすく、ほ
こりが付着し、それによる音の歪や画像のちらつ
きが生じやすい。
これらの欠点を改良するために、いろいろな添
加剤を磁性層に混入することが提案されている。
例えば特開昭57―183628ではCr2O3、SiC等、特
開昭57―164420では、α―Fe2O3、Cr2O3、Al2O3
等、特開昭57―150132では、SnO2、特開昭56―
29836では、MoS2、WS2等である。
これらはいずれも粒子が大で表面粗さを増し、
しかも帯電防止効果は十分でないため、カーボン
ラツクと併用されねばならない。（カーボンブラ
ツクはまた磁性層を黒色に着色することにより記
録部分の開始と終了を指示するために使用されて
いる。）しかし、カーボンブラツクは水散性に劣
り塗膜を劣化させるなどの問題がある。
本発明者らは、TiN(1-x)Ox（０ｘ0.1）の
微粉末を添加することにより、磁性層の耐摩耗性
と平滑性を向上し、適度の黒色度を出せることを
見出した。この粉末は黒色で、とくに粒子がこま
かくなると着色力に優れ、カーボンブラツクと併
用の必要はない。
TiN(1-x)Ox（０ｘ0.1）と定義した理由
は、製法によつてはTiOがTiNに固溶するが、そ
の量はｘが0.1程度までは許容されるからであ
る。
一般にTiNは金属Ti粉末をN2ガスまたはNH3ガ
スによつて窒化するか、TiO2と炭素との混合物
を高温でN2ガスと反応させることによつて得ら
れるが、このようにして得られる粉末は、比表面
積が５m2／ｇ未満であり、粗粉であるために良好
な結果は得られない。
磁性層に加えて上記の効果を発揮するのは、比
表面積が５m2／ｇ以上で、電気抵抗が101〜102
Ω・cm（10Kg／cm2圧粉体として）であるもので、
そのようなTiN粉末は、、TiCl4ガスとNH3ガスと
の気相反応によるか、TiCl4と液体NH3とをヘキ
サン溶媒中で反応させて生成するTi（NH2）2イミ
ドを熱分解するか、金属Ti粉末をN2ガス中でア
ーク溶解して得られる。
この粉末の比表面積は余り高すぎると、分散が
悪くなり、30m2／ｇ未満である必要である。
磁性層中への含有量は、磁性粉末100重量部に
対して0.5ないし10重量部である。0.5重量部未満
では有効でなく、10重量部を越すと磁気特性の低
下が無視できなくなるからである。
以下実施例によつて、本発明を具体的に説明す
る。
実施例
次の組成物をサンドグラインダー（五十嵐製作
所(株)製）で分散し、15μｍの厚さのポリエステル
フイルム上に乾燥厚みが約５μになるように塗布
し、乾燥した。
γ―Fe2O3粉末 100重量部
オレイン酸 １ 〃
ポリウレタン 10 〃
塩ビ―酢ビ共重合体 15 〃
ポリイソシアナート ８ 〃
メチルエチルケトン 100 〃
トルエン 100 〃
TiN粉末 0.5〜10 〃
ここでTiN粉末と称するものは、イミド法によ
つて得られた前記の式を満足する酸素を含む、比
表面積10m2／ｇ、電気抵抗６×101Ω・cm（10
Kg／cm2の圧粉体として）のものである。その組成
はTiN(1-x)Oxにおいて、ｘが0.1以下であつた。
これから所定の幅に切断した磁気テープを耐摩
耗性を調べるためにテープレコーダーに装填し、
５cm／secの速度で500回走行させて出力変動を測
定した。
結果を次の表にまとめて示す。
The present invention relates to a magnetic recording medium, and provides a magnetic recording medium having a magnetic layer with excellent wear resistance and antistatic ability. Generally, magnetic recording media are made by coating magnetic powder (γ-Fe 2 O 3 , Co-coated γ-Fe 2 O 3 , Fe, etc.) dispersed in an organic binder onto a non-magnetic base material such as polyester. However, the magnetic layer of the recording medium is easily abraded because it comes into violent contact with a magnetic head during recording and reproduction, and therefore there is a demand for a recording medium with excellent abrasion resistance. In addition, the magnetic layer is easily charged with static electricity, and dust tends to adhere to it, which tends to cause sound distortion and image flickering. In order to improve these drawbacks, it has been proposed to incorporate various additives into the magnetic layer.
For example, in JP-A-57-183628, Cr 2 O 3 , SiC, etc., and in JP-A-57-164420, α-Fe 2 O 3 , Cr 2 O 3 , Al 2 O 3
etc., in JP-A-57-150132, SnO 2 , JP-A-56-
29836 is MoS 2 , WS 2 , etc. All of these have large particles and increase surface roughness.
Moreover, since the antistatic effect is not sufficient, it must be used in combination with carbon rack. (Carbon black is also used to indicate the start and end of a recorded section by coloring the magnetic layer black.) However, carbon black has problems such as poor water dispersibility and deterioration of the coating film. be. The present inventors have discovered that by adding fine powder of TiN (1-x) O x (0x0.1), the wear resistance and smoothness of the magnetic layer can be improved and an appropriate degree of blackness can be achieved. Ta. This powder is black and has excellent tinting power, especially when the particles are fine, so there is no need to use it in combination with carbon black. The reason for defining TiN (1-x) O x (0x0.1) is that depending on the manufacturing method, TiO is dissolved in TiN as a solid solution, but the amount of TiO is allowed up to x of about 0.1. Generally, TiN is obtained by nitriding metallic Ti powder with N 2 gas or NH 3 gas, or by reacting a mixture of TiO 2 and carbon with N 2 gas at high temperature; The resulting powder has a specific surface area of less than 5 m 2 /g and is a coarse powder, so good results cannot be obtained. In addition to the magnetic layer, the above effects are achieved when the specific surface area is 5 m 2 /g or more and the electrical resistance is 10 1 to 10 2
Ω・cm (10Kg/cm 2 as a green compact),
Such TiN powder is produced by thermal decomposition of Ti(NH 2 ) 2 imide, which is produced either by gas-phase reaction between TiCl 4 gas and NH 3 gas or by reacting TiCl 4 with liquid NH 3 in a hexane solvent. Alternatively, it can be obtained by arc melting metallic Ti powder in N2 gas. If the specific surface area of this powder is too high, dispersion will be poor, so it needs to be less than 30 m 2 /g. The content in the magnetic layer is 0.5 to 10 parts by weight per 100 parts by weight of magnetic powder. This is because if it is less than 0.5 parts by weight, it is not effective, and if it exceeds 10 parts by weight, the deterioration in magnetic properties cannot be ignored. The present invention will be specifically explained below with reference to Examples. Example The following composition was dispersed using a sand grinder (manufactured by Igarashi Seisakusho Co., Ltd.), applied onto a 15 μm thick polyester film to a dry thickness of about 5 μm, and dried. γ-Fe 2 O 3 powder 100 parts by weight Oleic acid 1 Polyurethane 10 Vinyl chloride-vinyl acetate copolymer 15 Polyisocyanate 8 Methyl ethyl ketone 100 Toluene 100 TiN powder 0.5-10 Here, referred to as TiN powder contains oxygen that satisfies the above formula obtained by the imide method, has a specific surface area of 10 m 2 /g, and an electrical resistance of 6 × 10 1 Ω・cm (10
kg/ cm2 ). Its composition was TiN (1-x) O x where x was 0.1 or less. The magnetic tape was cut to a predetermined width and loaded into a tape recorder to check its wear resistance.
It was run 500 times at a speed of 5 cm/sec and output fluctuations were measured. The results are summarized in the table below.
【表】
上述のように本発明の磁気記録媒体は優れた耐
摩耗性と電気特性を有する。[Table] As described above, the magnetic recording medium of the present invention has excellent wear resistance and electrical properties.
Claims (1)
する磁気記録媒体において、磁性層が比表面積が
５m2／ｇ以上30m2／ｇ未満の微細なTiN(1-x)Ox
（０ｘ0.1）粉末を磁性材料100重量部に対し
て0.5ないし10重量部の割合で含有することを特
徴とする磁気記録媒体。1. In a magnetic recording medium having a magnetic layer containing magnetic powder on a non-magnetic support, the magnetic layer has a fine TiN (1-x) O x with a specific surface area of 5 m 2 /g or more and less than 30 m 2 /g.
1. A magnetic recording medium containing (0x0.1) powder in a ratio of 0.5 to 10 parts by weight per 100 parts by weight of a magnetic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23963683A JPS60133526A (en) | 1983-12-21 | 1983-12-21 | Magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23963683A JPS60133526A (en) | 1983-12-21 | 1983-12-21 | Magnetic recording medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60133526A JPS60133526A (en) | 1985-07-16 |
| JPS6255211B2 true JPS6255211B2 (en) | 1987-11-18 |
Family
ID=17047655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23963683A Granted JPS60133526A (en) | 1983-12-21 | 1983-12-21 | Magnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60133526A (en) |
-
1983
- 1983-12-21 JP JP23963683A patent/JPS60133526A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60133526A (en) | 1985-07-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0479052B2 (en) | ||
| GB2055780A (en) | Magnetic powder for magnetic recording medium | |
| JPH0576088B2 (en) | ||
| JPS6255209B2 (en) | ||
| JPS6255211B2 (en) | ||
| JPS6222176B2 (en) | ||
| JPH0249490B2 (en) | ||
| JPH0142050B2 (en) | ||
| JPS6222182B2 (en) | ||
| JPS6255212B2 (en) | ||
| JPH0555928B2 (en) | ||
| JPS5939812B2 (en) | magnetic recording medium | |
| JPS59139132A (en) | Magnetic recording medium | |
| JPH0444626A (en) | Magnetic recording medium | |
| JPS6255210B2 (en) | ||
| JPS59186128A (en) | Magnetic recording medium | |
| JPS62124624A (en) | Magnetic recording medium | |
| JPS61180927A (en) | Magnetic recording medium | |
| JPS63133317A (en) | Magnetic recording medium | |
| JPH03192516A (en) | Magnetic recording medium | |
| JPH01102728A (en) | Magnetic recording medium | |
| JPS58200429A (en) | Magnetic recording medium | |
| JPH0542058B2 (en) | ||
| JPS59144037A (en) | Magnetic recording medium | |
| JPS61182630A (en) | Production of magnetic recording medium |