JPS63133318A - Magnetic recording medium - Google Patents
Magnetic recording mediumInfo
- Publication number
- JPS63133318A JPS63133318A JP61278774A JP27877486A JPS63133318A JP S63133318 A JPS63133318 A JP S63133318A JP 61278774 A JP61278774 A JP 61278774A JP 27877486 A JP27877486 A JP 27877486A JP S63133318 A JPS63133318 A JP S63133318A
- Authority
- JP
- Japan
- Prior art keywords
- recording medium
- magnetic
- magnetic recording
- magnetic layer
- organosilicone
- 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
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 70
- 125000001183 hydrocarbyl group Chemical group 0.000 claims abstract description 8
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims abstract description 5
- 150000001875 compounds Chemical class 0.000 claims description 40
- 125000004432 carbon atom Chemical group C* 0.000 claims description 8
- 229910052731 fluorine Chemical group 0.000 claims description 2
- 125000001153 fluoro group Chemical group F* 0.000 claims 1
- 229910052739 hydrogen Inorganic materials 0.000 claims 1
- 239000001257 hydrogen Substances 0.000 claims 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims 1
- 239000000126 substance Substances 0.000 claims 1
- 230000007423 decrease Effects 0.000 abstract description 8
- 239000006247 magnetic powder Substances 0.000 abstract description 8
- 239000004215 Carbon black (E152) Substances 0.000 abstract 1
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 229930195733 hydrocarbon Natural products 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 15
- 239000011230 binding agent Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 6
- 229920001296 polysiloxane Polymers 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 230000000740 bleeding effect Effects 0.000 description 4
- 230000007774 longterm Effects 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
- 230000001050 lubricating effect Effects 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 229930195734 saturated hydrocarbon Natural products 0.000 description 2
- -1 valmicyl Chemical group 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- QMMJWQMCMRUYTG-UHFFFAOYSA-N 1,2,4,5-tetrachloro-3-(trifluoromethyl)benzene Chemical compound FC(F)(F)C1=C(Cl)C(Cl)=CC(Cl)=C1Cl QMMJWQMCMRUYTG-UHFFFAOYSA-N 0.000 description 1
- 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 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 125000002511 behenyl 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])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 125000003438 dodecyl group Chemical group [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])* 0.000 description 1
- 125000005313 fatty acid group Chemical group 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 210000003127 knee Anatomy 0.000 description 1
- 229940067606 lecithin Drugs 0.000 description 1
- 235000010445 lecithin Nutrition 0.000 description 1
- 239000000787 lecithin Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 125000001421 myristyl 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])[H] 0.000 description 1
- WWZKQHOCKIZLMA-UHFFFAOYSA-N octanoic acid Chemical compound CCCCCCCC(O)=O WWZKQHOCKIZLMA-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
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 229920003225 polyurethane elastomer Polymers 0.000 description 1
- 229920006395 saturated elastomer Polymers 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
- 239000011882 ultra-fine particle Substances 0.000 description 1
- 229930195735 unsaturated hydrocarbon Natural products 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
Landscapes
- Lubricants (AREA)
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
Abstract
Description
本発明は、磁気テープ又は磁気ディスク等の磁気記録媒
体に関するものである。The present invention relates to a magnetic recording medium such as a magnetic tape or a magnetic disk.
近年における高密度記録の要求は、磁性粉としてメタル
磁性粉を用いるのみでなく、磁性粉は超微粒子化するこ
とが求められており、又、磁性層の表面はより一層の平
滑化が求められている。
この為、磁気記録媒体は、例えば磁気ヘッドの表面又は
ガイドビンの表面と隙間なく密着するようになり、従っ
て磁気記録媒体の走行時における摩擦抵抗は著しく高く
なり、磁気記録媒体の走行性は悪くなり、又、磁性層の
耐摩耗性等は低下することになる。
従って、かかる欠点を解決する為に、すなわち磁気記録
媒体の走行時における磁性層の動摩擦係数を小さくする
為、ジメチルシリコーンあるいは下記の一般式［＋］〜
［［］で示される変性オルガノシリコーンを磁性層中に
添加することが提案（特開昭５２−７０８１１号公報、
特開昭５２−１０８８０４号公報、特開昭５６−１６９
２２３号公報、特開昭５６−１６９２２３号公報、特開
昭５７−１２４１４号公報、特開昭５７−１２４２０号
公報、特開昭５９−２２２２７号公報、特開昭５９−２
２２２９号公報）されている。
ＣＦ。
］
しかし、従来から良く用いられてきたジメチルシリコー
ンは、潤滑性に優れているものの、磁性層表面に滲み出
しやすく、この為粘着現象が起きることになり、電磁変
換特性が低下する等の欠点が指摘されていることも良く
知られており、このジメチルシリコーンに代るものとし
て上記一般式［１］〜［Ｉ！］で示した変性オルガノシ
リコーンが提案されてきたのである。
しかし、一般式［１］で示した変性オルガノシリコーン
は、バインダとの相溶性が悪く、ブルーミングが起きや
すいものであり、又、長時間走行時における磁性層の耐
久性は悪い欠点がある。
又、−ｍ式［１１１で示した変性オルガノシリコーンは
、バインダとの相溶性は良いものの、熱安定性が悪く、
従って高温多湿といった条件下での使用は制約を受け、
高温多湿下での使用時には走行安定性は著しく悪化して
しまい、又、磁性塗料のゲル化が引き起こされやすいこ
と、がっ、磁性塗料の分散性が悪くなること等によって
磁気記録媒体の製造が面倒といった欠点もある。
又、−ｍ式［１１１］及び［ＩＶ］で示した変性オルガ
ノシリコーンは、熱安定性が良いものの、バインダとの
相溶性が悪く、従って長時間走行時における磁性層の耐
久性は悪い欠点がある。
又、−ｆｆｉ式［Ｖ］で示した変性オルガノシリコーン
は、熱安定性が良いものの、バインダとの相溶性が悪く
、ブルーミングが起きやすく、又、長時間走行時におけ
る磁性層の耐久性は悪い欠点がある。
又、一般式［■］で示した変性オルガノシリコーンは、
低温条件下での滑性効果が小さく、従って低温下におい
て使用すると磁気記録媒体の走行性及び耐久性が乏しい
欠点がある。
又、−ｉ式［■コで示した変性オルガノシリコーンは、
バインダとの相溶性が悪く、又、ブリード現象が激しく
起き、粘着現象が起きやすい欠点がある。
又、一般式［■コ及び［ｆｆ］で示した変性オルガノシ
リコーンは、これまでに述べたシリコーンに比べれば大
巾に好ましい結果を示すものの、これで充分満足できる
ものでもない。
特に、磁性粉として例えばＢ、ＥＴが約４５＋＊”７ｇ
以上のような超微細なメタル磁性粉を用いた場合には、
例えばこれまでの酸化物系の磁性粉に用いた場合のよう
な大きな効果が得られていないのである。In recent years, demands for high-density recording have required not only the use of metal magnetic powder as the magnetic powder, but also that the magnetic powder be made into ultrafine particles, and the surface of the magnetic layer required to be even smoother. ing. For this reason, the magnetic recording medium comes into close contact with, for example, the surface of the magnetic head or the surface of the guide bin without any gaps, and therefore the frictional resistance when the magnetic recording medium runs becomes extremely high, resulting in poor running performance of the magnetic recording medium. In addition, the wear resistance of the magnetic layer will deteriorate. Therefore, in order to solve this drawback, that is, to reduce the coefficient of dynamic friction of the magnetic layer during running of the magnetic recording medium, dimethyl silicone or the following general formula [+] ~
It was proposed to add a modified organosilicone represented by [[] to the magnetic layer (Japanese Patent Laid-Open No. 52-70811,
JP-A-52-108804, JP-A-56-169
JP-A-223, JP-A-56-169223, JP-A-57-12414, JP-A-57-12420, JP-A-59-22227, JP-A-59-2
No. 2229). C.F. ] However, although dimethyl silicone, which has been commonly used in the past, has excellent lubricity, it tends to ooze out onto the surface of the magnetic layer, resulting in a sticking phenomenon and a reduction in electromagnetic conversion characteristics. It is well known that the above general formulas [1] to [I! ] Modified organosilicones have been proposed. However, the modified organosilicone represented by the general formula [1] has poor compatibility with binders, tends to cause blooming, and has the disadvantage that the durability of the magnetic layer during long-term running is poor. Furthermore, although the modified organosilicone represented by the -m formula [111] has good compatibility with the binder, it has poor thermal stability;
Therefore, use under conditions such as high temperature and humidity is restricted,
When used in high temperature and high humidity environments, the running stability deteriorates significantly, and the magnetic paint tends to gel, and the dispersibility of the magnetic paint deteriorates, making it difficult to manufacture magnetic recording media. It also has some disadvantages, such as being troublesome. Furthermore, although the modified organosilicones represented by -m formulas [111] and [IV] have good thermal stability, they have poor compatibility with binders, and therefore have the disadvantage that the durability of the magnetic layer during long-term running is poor. be. Furthermore, although the modified organosilicone represented by the -ffi formula [V] has good thermal stability, it has poor compatibility with binders, tends to cause blooming, and has poor durability of the magnetic layer during long-term running. There are drawbacks. In addition, the modified organosilicone represented by the general formula [■] is
The lubricity effect under low temperature conditions is small, and therefore, when used at low temperatures, the running performance and durability of the magnetic recording medium are poor. In addition, the modified organosilicone shown by formula -i [■] is
It has the disadvantage that it has poor compatibility with binders, and also tends to cause severe bleeding and stickiness. Furthermore, although the modified organosilicones represented by the general formulas [■] and [ff] show much more favorable results than the silicones described above, they are not fully satisfactory. In particular, about 45+*"7g of magnetic powder such as B and ET
When using ultrafine metal magnetic powder as described above,
For example, it has not been able to achieve the same great effects as when used with conventional oxide-based magnetic powders.
本発明者は、種々のシリコーン化合物を磁性層中に添加
した場合における磁気記録媒体の特性についての研究を
鋭意押し進めた結果、下記の一服式［Ａ］で示されるオ
ルガノシリコーン化合物がこれまでに提案されてきたシ
リコーン化合物に比べて著しく優れていることを見出し
、本発明を成し遂げたのである。
すなわち、この一般式［Ａ］で示されるオルガノシリコ
ーン化合物は、その分子中にバインダとの親和性に優れ
た効果を発揮する例えばカプリル、カプリン、ラウリル
、ミリスチル、バルミチル、ステアリル、ベヘニル、ゾ
ーマリル、オレイル、リノール、リルン、ガドレイル等
の脂肪酸基を有しているから、バインダとの相溶性の良
いことが期待でき、又、分子中にｍｓを有しているが故
に、長時間の使用においても磁性層の欠落はなく、すな
わち繰り返し使用されても磁性層の耐久性に優れている
ことが期待でき、そして高温多湿下でも分解することな
く、熱安定性に優れており、しかもフッ素を有している
が故にあらゆる環境下においても滑性効果を発揮するこ
とが期待できるのである。
尚、上記の一般式［Ａ］において、Ｒは炭素数が７〜２
１の飽和又は不飽和の炭化水素基であることが重要なの
は、Ｒの炭素数が６以下の少ないものでは、その滑性効
果が充分でなくなり、磁性層の耐久性は低下し、逆に、
Ｒの炭素数が２２以上の多いものでは、バインダとの相
溶性が低下し、又、低温における滑性効果が小さくなる
からである。
又、Ｒ，、Ｒ２，Ｒ，は、メチル基又はＲｃｏｏ基であ
る。
Ｒ１は炭素数が１〜２０の炭化水素基であることが、さ
らに好ましくは飽和の炭化水素基であることが、より一
層好ましくは炭素数が１〜４のアルキル基であることが
、最も好ましくはメチル基であることが望ましい、これ
は、炭素数が２１以上の炭化水素基であると、バインダ
との相溶性が著しく低下するからである。
又、ＸはＣＦ、又は−ＣＨ，ＣＨ，→ＣＦ、←Ｗ（但し
、ｌは１〜８の整数、Ｗは水素又はフッ素原子）で示さ
れるフッ化アルキル基であり、このフッ化アルキル基を
一般式［Ａ］中にもたせておくことにより、低温下にお
いても滑性効果が充分に発揮できるのである。
又、ｋ、ａ、ｂ、ｅ、ｄは、１≦ｋ、１≦ａ＜２００．
１≦ｂ＜２００．１≦ｃ＜２００、Ｏ≦ｄ＜ ３００．
ａ＋ ｂ＋ ｃ＋ ｄ≦５００の条件を満たすもので
あることが大事である。これは、−１Ｒ式［Ａ］で示さ
れる化合物の分子量が大きくなりすぎると、バインダと
の相溶性が悪くなり、磁性塗料の分散性も悪くなり、磁
性層の表面平滑性も低下して、電磁変換特性が低下する
からである。
又、ｋが０になると熱安定性が著しく悪くなり、高温多
湿下においては磁性層の耐久性が極度に低下するからで
ある。又、ＣがＯになると、バインダとの相溶性が低下
するからである。
尚、１≦ａ＜ １００．１≦ｂ＜１００．１≦ｃ＜ １
００．０≦ｄ＜２００．ａ＋ ｂ＋ ｃ＋ ｄ≦３００
．１≦ｋ＜ａ＋ ｂ＋ｃ＋ ｄ、０．１＜ （ａ＋ ｂ
＋ ｃ）／ ｄの条件を満たす整数であることがより一
層望ましいものである。
そして、上記一般式［Ａ］で示されるオルガノシリコー
ン化合物は、磁性粉１００重量部に対して約０．５〜６
重量部の範囲内で用いることが望ましい。
これは、一般式［Ａ］で示されるオルガノシリコーン化
合物の添加量が多くなりすぎると、磁性層の可塑効果が
大きくなりすぎ、例えばスチル再生時の耐久性が低下す
る等磁性層の耐久性の低下が大きくなり、そして少なす
ぎるとそれだけ効果が小さくなるからである。As a result of intensive research into the characteristics of magnetic recording media when various silicone compounds are added to the magnetic layer, the present inventor has proposed an organosilicone compound represented by the following formula [A]. They discovered that the silicone compound is significantly superior to conventional silicone compounds, and achieved the present invention. That is, the organosilicone compound represented by the general formula [A] has compounds in its molecule, such as caprylic, capric, lauryl, myristyl, valmicyl, stearyl, behenyl, zomaryl, and oleyl. Because it has fatty acid groups such as linole, linole, and gadleyl, it can be expected to have good compatibility with binders, and because it has ms in the molecule, it remains magnetic even after long-term use. There is no layer loss, which means that the magnetic layer is expected to have excellent durability even after repeated use, and it has excellent thermal stability without decomposing even under high temperature and humidity, and it also contains fluorine. Because of this, it can be expected to exhibit a slippery effect under any environment. In addition, in the above general formula [A], R has 7 to 2 carbon atoms.
The reason why it is important that R is a saturated or unsaturated hydrocarbon group is that if R has a small number of carbon atoms (6 or less), the lubricating effect will not be sufficient and the durability of the magnetic layer will decrease;
This is because if R has a large number of carbon atoms of 22 or more, the compatibility with the binder decreases and the lubricating effect at low temperatures decreases. Further, R,, R2, R, is a methyl group or an Rcoo group. R1 is most preferably a hydrocarbon group having 1 to 20 carbon atoms, more preferably a saturated hydrocarbon group, even more preferably an alkyl group having 1 to 4 carbon atoms. is preferably a methyl group, because if it is a hydrocarbon group having 21 or more carbon atoms, the compatibility with the binder will be significantly reduced. Moreover, By including in the general formula [A], the lubricating effect can be sufficiently exhibited even at low temperatures. Further, k, a, b, e, and d are 1≦k, 1≦a<200.
1≦b<200.1≦c<200, O≦d<300.
It is important that the condition of a+ b+ c+ d≦500 be satisfied. This is because if the molecular weight of the compound represented by -1R formula [A] becomes too large, the compatibility with the binder will deteriorate, the dispersibility of the magnetic coating will also deteriorate, and the surface smoothness of the magnetic layer will decrease. This is because electromagnetic conversion characteristics deteriorate. Further, if k becomes 0, the thermal stability will be significantly deteriorated, and the durability of the magnetic layer will be extremely reduced under high temperature and high humidity conditions. Moreover, when C becomes O, the compatibility with the binder decreases. In addition, 1≦a<100.1≦b<100.1≦c<1
00.0≦d<200. a+ b+ c+ d≦300
．． 1≦k<a+ b+c+ d, 0.1< (a+ b
It is even more desirable that it be an integer that satisfies the condition of +c)/d. The organosilicone compound represented by the above general formula [A] is about 0.5 to 6 parts by weight per 100 parts by weight of the magnetic powder.
It is desirable to use within the range of parts by weight. This is because if the amount of the organosilicone compound represented by the general formula [A] added is too large, the plasticizing effect of the magnetic layer becomes too large, and the durability of the magnetic layer decreases, for example, the durability during still playback decreases. This is because the reduction becomes large, and if it is too small, the effect becomes smaller.
【実施例１】
鉄元素を主成分とする強磁性体の超微粉末（ＢＥＴ５０
１１２／［１）１００重量部、塩化ビニル−酢酸ビニル
−ビニルアルコール共重合体１０重量部、ポリウレタン
エラストマー２（ｌ ｎ ｇ 、酸化アルミニウム粉末
１０重量部、レシチン１重量部、ステアリン酸ブチル１
重量部、Ｒ；Ｃｔｌｌ＋ｓ、Ｒ，＝Ｒ，＝Ｒ，＝Ｒ，＝
Ｃ１１，、Ｘ＝ＣＦ、、ｋ：ａ＝ｂ−〇：２、ｄ；１０
の一般式［Ａ］で表わされるオルガノシリコーン化合物
２重量部、トルエン、メチルエチルケトン及びメチルイ
ンブチルケトンの混合物３００重量部の組成物を混合分
散後、これにインシアネート系の硬化剤を２０重量部加
えてさらに分散後、この磁性塗料をポリエステルフィル
ム等の非磁性支持体面上に塗布し、そして配向、カレン
ダー及び硬化処理等の通常の工程を経て、磁気テープ等
の磁気記録媒体を得る。[Example 1] Ultrafine ferromagnetic powder (BET50
112/[1) 100 parts by weight, vinyl chloride-vinyl acetate-vinyl alcohol copolymer 10 parts by weight, polyurethane elastomer 2 (lng), aluminum oxide powder 10 parts by weight, lecithin 1 part by weight, butyl stearate 1
Parts by weight, R; Ctll+s, R, = R, = R, = R, =
C11,,X=CF,,k:a=b-〇:2,d;10
After mixing and dispersing a composition of 2 parts by weight of an organosilicone compound represented by the general formula [A], 300 parts by weight of a mixture of toluene, methyl ethyl ketone and methyl imbutyl ketone, 20 parts by weight of an incyanate-based curing agent was added thereto. After further dispersion, this magnetic coating material is applied onto the surface of a non-magnetic support such as a polyester film, and then subjected to conventional steps such as orientation, calendaring and curing treatment to obtain a magnetic recording medium such as a magnetic tape.
【実施例２】
実施例１におけるオルガノシリコーン化合物を、Ｒ；Ｃ
７Ｈ＋ｓ、Ｒ，＝Ｒ２＝Ｃ？ｌ＋、５Ｃ００、Ｒ，、Ｃ
Ｉｌ、、Ｉｔ、＝Ｃ，。１１２１、Ｘ＝ＣＦ、、ｋ＝ａ
＝ｂ＝Ｃ・２、ｄ＝１０のものにして同様に行ない、磁
気記録媒体を得る。[Example 2] The organosilicone compound in Example 1 was
7H+s,R,=R2=C? l+, 5C00, R,,C
Il,,It,=C,. 1121, X=CF,, k=a
The same procedure is carried out with =b=C.2 and d=10 to obtain a magnetic recording medium.
【実施例３】
実施例１におけるオルガノシリコーン化合物を、Ｒ＝Ｃ
＋５Ｈ２ｔ、Ｒ，＝Ｒ２＝Ｒ，＝１１．＝Ｃ■１、Ｘ＝
ＣＦ、、ｋ＝１、ａ・５、ｂ＝ｃ・２、ｄ・１０のもの
にして同様に行ない、磁気記録媒体を得る。[Example 3] The organosilicone compound in Example 1 was
+5H2t,R,=R2=R,=11. =C■1,X=
The same procedure is performed using CF, k=1, a.5, b=c.2, d.10 to obtain a magnetic recording medium.
【実施例４】
実施例１におけるオルガノシリコーン化合物を、Ｒ−Ｃ
１ｖＨｓｔ、Ｌ ＝ Ｒ，＝ Ｃ，３ｆｔ、、ＣＯＯ１
Ｒ，＝Ｒ，＝Ｃ１１３、ＸニーＣＩＩ□ＣＬＣＦｚ、ｋ
＝２、ａ＝５、ｂ＝ ｅ＝ １０、ｄ＝２０のらのにし
て同様に行ない、磁気記録媒体を得る。[Example 4] The organosilicone compound in Example 1 was
1vHst, L=R,=C,3ft,,COO1
R,=R,=C113,X knee CII□CLCFz,k
Similarly, a magnetic recording medium is obtained using the following steps: = 2, a = 5, b = e = 10, and d = 20.
【実施例５】
実施例１におけるオルガノシリコーン化合物を、Ｉｔ＝
Ｃ，、＋１２．、Ｒ，＝Ｒ，＝Ｉ＋、＝ＣＩ＋、、Ｒ，
＝Ｃ，，１＋１．、Ｃｏｏ、Ｘ＝ＣＦ、、ｋ・５、ａ・
５、ｂ・２、Ｃ・７、ｄ・３０のものにして同様に行な
い、磁気記録媒体を得る。[Example 5] The organosilicone compound in Example 1 was
C,,+12. ,R,=R,=I+,=CI+,,R,
=C,,1+1. ,Coo,X=CF,,k・5,a・
5, b.2, C.7, and d.30 were used in the same manner to obtain magnetic recording media.
【実施例６】
実施例１におけるオルガノシリコーン化合物を、Ｒ二Ｃ
ＩＪＩＹ、Ｒ，＝Ｒ２＝Ｉｌ、＝Ｒ，＝ＣＩ＋、、Ｘ＝
ＣＦ、、ｋ＝５、ａ＝ ｂ＝ ｃ＝ ５０．ｄ＝ １０
０のものにして同様に行ない、磁気記録媒体を得る。[Example 6] The organosilicone compound in Example 1 was
IJIY,R,=R2=Il,=R,=CI+,,X=
CF,, k=5, a= b= c= 50. d=10
0, and the same procedure is performed to obtain a magnetic recording medium.
【実施例７】
実施ｒＩＡ１におけるオルガノシリコーン化合物を、ｒ
＋＝ ｃ、ア１１．。、Ｒ，＝ Ｌ ＝ Ｌ ＝ ＣＩ
ｌ、、Ｌ＝Ｃ＋ｓＬ３、！＝−ＣＨｚＣＨｚＣＦ３、ｋ
＝３、ａ：１０．ｂ＝８、ｃ：２５、ｄ−７５のものに
して同様に行ない、磁気記録媒体を得る。[Example 7] The organosilicone compound in Example rIA1 was
+= c, a11. . ,R,=L=L=CI
l,,L=C+sL3,! =-CHzCHzCF3,k
=3, a:10. The same procedure was carried out with b=8, c:25, and d-75 to obtain a magnetic recording medium.
【実施例８】
実施例１におけるオルガノシリコーン化合物を、Ｒ＝Ｃ
，，１１，、、Ｒ，＝ １１．＝ Ｒ，＝ Ｃ，、＋１
３３ｃＯｏ、Ｉｔ、＝Ｃｌ１．、Ｘ＝−ＣＩｌ、ＣＩｌ
、ＣＦ、、 ｋ＝２、 ａ４、 ｂ＝１０． ｅ・１
５、 ｄ＝１２５のものにして同様に行ない、磁気記録
媒体を得る。[Example 8] The organosilicone compound in Example 1 was
,,11,,,R,=11. = R, = C,, +1
33cOo,It,=Cl1. , X=-CIl, CIl
, CF,, k=2, a4, b=10. e・1
5. Repeat the same procedure with d=125 to obtain a magnetic recording medium.
【比較例１】
実施例１におけるオルガノシリコーン化合物の代りに、
ｌ１＝Ｒ′＝Ｃ，３＋１２７、ｎ□５の一般式［１］で
示されるオルガノシリコーン化合物を用いて同様に行な
い、磁気記録媒体を得る。[Comparative Example 1] Instead of the organosilicone compound in Example 1,
A magnetic recording medium is obtained in the same manner using an organosilicone compound represented by the general formula [1] where l1=R'=C, 3+127, n□5.
【比較例２１
実施例１におけるオルガノシリコーン化合物の代りに、
１１４’ ・Ｃ＋ｚＨｚｔ、端・３、ｎ□１５の一般式
［１１］で示されるオルガノシリコーン化合物を用いて
同様に行ない、磁気記録媒体を得る。
【比較例３】
実施例１におけるオルガノシリコーン化合物の代りに、
Ｒ；Ｃ＋５１１ｉｙ、ｎ：３、ｉ：１０、−二８、ｎ：
３０の一般式［１［１］で示されるオルガノシリコーン
化合物を用いて同様に行ない、磁気記録媒体を得る。[Comparative Example 21 Instead of the organosilicone compound in Example 1,
A magnetic recording medium is obtained by carrying out the same procedure using an organosilicone compound represented by the general formula [11] of 114' .C+zHzt, end 3, n□15. [Comparative Example 3] Instead of the organosilicone compound in Example 1,
R; C+511iy, n: 3, i: 10, -28, n:
A magnetic recording medium is obtained in the same manner using an organosilicone compound represented by the general formula [1[1] of No. 30.
【比較例４】
実施例１におけるオルガノシリコーン化合物の代りに、
Ｒ”Ｃ１３１１２７、ｎ；３、ｌ；１０、−・８、ｎ＝
２０の一般式［■］で示されるオルガノシリコーン化合
物を用いて同様に行ない、磁気記録媒体を得る。[Comparative Example 4] Instead of the organosilicone compound in Example 1,
R”C131127,n;3,l;10,-・8,n=
A magnetic recording medium is obtained by carrying out the same procedure using an organosilicone compound represented by the general formula [■] of No. 20.
【比較例５】
実施例１におけるオルガノシリコーン化合物の代りに、
Ｒ，＝Ｒ，＝Ｃ，，＋１．７、？５．１２、ｎ；３０の
一般式［Ｖ］で示されるオルガノシリコーン化合物を用
いて同様に行ない、磁気記録媒体を得る。[Comparative Example 5] Instead of the organosilicone compound in Example 1,
R,=R,=C,,+1.7,? A magnetic recording medium is obtained by carrying out the same procedure using an organosilicone compound represented by the general formula [V] with 5.12, n; 30.
【比較例６１
実施ｆ！ＩＪ１におけるオルガノシリコーン化合物の代
りに、Ｒ＝Ｃ＋ｚｌｌｔ１、−・３、ｎ□１５の一般式
［■コで示されるオルガノシリコーン化合物を用いて同
様に行ない、磁気記録媒体を得る。
【比較例７］
実施Ｍｌにおけるオルガノシリコーン化合物の代りに、
！・２、輸・３０、ｎ・５の一般式［■］で示されるオ
ルガノシリコーン化合物を用いて同様に行ない、磁気記
録媒体を得る。
【比較例８】
実施例１におけるオルガノシリコーン化合物の代りに、
Ｒ１・Ｃ，、＋１．、、Ｉ’１．＝ＣＩＩ、、Ｒ１・ｃ
、、１１．、ＣＯＯ１Ｙ＝ＣＦ、、ｌ：３０、−二３８
、ｎ＝２０の一般式［■］で示されるオルガノシリコー
ン化合物を用いて同様に行ない、磁気記録媒体を得る。[Comparative Example 61 Implementation f! In place of the organosilicone compound in IJ1, an organosilicone compound represented by the general formula [■] of R=C+zllt1, -.3, n□15 is used in the same manner to obtain a magnetic recording medium. [Comparative Example 7] Instead of the organosilicone compound in the implementation Ml,
! A magnetic recording medium is obtained by carrying out the same procedure using an organosilicone compound represented by the general formula [■] of 2, x30, n5. [Comparative Example 8] Instead of the organosilicone compound in Example 1,
R1・C,,+1. ,,I'1. =CII,,R1・c
,,11. ,COO1Y=CF,,l:30,-238
, n=20 and an organosilicone compound represented by the general formula [■] to obtain a magnetic recording medium.
【比較例９】
実施例１におけるオルガノシリコーン化合物の代りに、
Ｒ＝Ｃ，、Ｉ＋□１、Ｒ，＝Ｒ，・Ｒ１・Ｃ１１，、Ｒ
，＝Ｃ，３ＩＩ□、Ｃ００、ｋ＝５、ｎ＝２、―・７、
ｎ；３０の一般式［ＩＸ］で示されるオルガノシリコー
ン化合物を用いて同様に行ない、磁気記録媒体を得る。[Comparative Example 9] Instead of the organosilicone compound in Example 1,
R=C,, I+□1, R,=R,・R1・C11,,R
,=C,3II□,C00,k=5,n=2,--7,
A magnetic recording medium is obtained by carrying out the same procedure using an organosilicone compound represented by the general formula [IX] with n: 30.
【比較例１０】
実施例１におけるオルガノシリコーン化合物の代りに、
比較例８及び比較例って用いたオルガノシリコーン化合
物を１ｊｔ量部ずつ用いて同様に行ない、磁気記録媒体
を得る。[Comparative Example 10] Instead of the organosilicone compound in Example 1,
Comparative Example 8 and the organosilicone compound used in Comparative Example were carried out in the same manner using 1 jt part each to obtain a magnetic recording medium.
上記各側で得た磁気記録！Ｘ体の動摩擦係数μｋ（温度
２０℃、湿度８０％ＲＨの環境下）、及び２００回の繰
り返し走行後における動摩擦係数μｋ（温度４０℃、湿
度８０％ＲＨの環境下で２００回の繰り返し走行後）、
常温において４０φの回転ドラムを２０Ｏｒｐｍで回転
させ、その際の勤皇擦係数の上昇傾向による磁性層の耐
摩耗性、さらにはブリード現象の有無を調べたので、そ
の結果を表に示す。
これによれば比較例１〜７までのオルガノシリコーン化
合物を用いた磁気記録媒体では繰り返し走行後における
動摩擦係数の増大が酷く、磁性層の耐久性にとぼしく、
又、ブリード現象等も認められることがわかる。
又、比較例８，９．１０の磁気記録媒体は、ブリード現
象もわずかしか起きず、又、磁性層の耐窄耗性も良いも
のの動串擦傷数は比較的大きく、この為走行性がそれ程
良いとは言えないものであり、従って走行性の低下から
電磁変換特性もそれだけ低下するものになる。
これに対して、本実施例の磁気記録媒体は、ブリード現
象はほとんど起きないものであり、又、磁性層の耐窄耗
性ら優れており、さらには動ｒ！Ｊ擦係数も小さいもの
である。
特に、比較的良好な結果を示した比較例８〜１０のもの
に比べても動摩擦係数は約１０％程度小さなものになっ
ており、これによって磁気記録媒体の走行性が向上する
程度は非常に大きく、電磁変換特性の向上も大きいので
ある。Magnetic records obtained on each side above! Dynamic friction coefficient μk of body X (under an environment of temperature 20°C and humidity 80% RH), and dynamic friction coefficient μk after 200 repeated runs (after 200 repeated runs under an environment of temperature 40°C and humidity 80% RH) ),
A rotary drum of 40φ was rotated at 20 rpm at room temperature, and the wear resistance of the magnetic layer was examined based on the tendency of the friction coefficient to increase at that time, as well as the presence or absence of a bleed phenomenon. The results are shown in the table. According to this, in the magnetic recording media using the organosilicone compounds of Comparative Examples 1 to 7, the coefficient of dynamic friction increased significantly after repeated running, and the durability of the magnetic layer deteriorated.
It can also be seen that a bleed phenomenon is also observed. In addition, in the magnetic recording media of Comparative Examples 8, 9, and 10, only a slight bleeding phenomenon occurred, and although the magnetic layer had good wear resistance, the number of dynamic skewer scratches was relatively large, and therefore the running properties were not as good. This cannot be said to be good, and as a result, the running performance deteriorates, and the electromagnetic conversion characteristics also deteriorate accordingly. On the other hand, the magnetic recording medium of this example hardly causes any bleeding phenomenon, has excellent wear resistance of the magnetic layer, and has even higher dynamic r! The J friction coefficient is also small. In particular, the coefficient of kinetic friction is about 10% smaller than those of Comparative Examples 8 to 10, which showed relatively good results, and the extent to which this improves the running performance of the magnetic recording medium is extremely significant. The improvement in electromagnetic conversion characteristics is also large.
本発明に係る磁気記録媒体は、磁性層中に一般式［Ａ］
で表わされるオルガノシリコーン化合物を含むので、動
摩擦係数は低く、特に繰り返し走行後にあっても動摩擦
係数は低く、磁気記録媒体の走行性が良好であり、又走
行安定性にも富んでおり、この走行性及び走行安定性が
良いことがら電磁変換特性は良いものになり、又、磁性
層の耐久性にも優れており、さらにはブリード現象も起
きにくい等の特長を有する。The magnetic recording medium according to the present invention has the general formula [A] in the magnetic layer.
Since it contains an organosilicone compound represented by It has good electromagnetic conversion characteristics due to good properties in terms of strength and running stability, and also has excellent durability of the magnetic layer, and also has features such as being resistant to bleeding phenomena.
Claims (1)
リコーン化合物を含む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▼［Ａ］ （但し、Ｒは炭素数７〜２１の炭化水素基、Ｒ＿１、Ｒ
＿２、Ｒ＿３はメチル基又はＲＣＯＯ基、Ｒ＿４は炭素
数１〜２０の炭化水素基、ｋ、ａ、ｂ、ｃ、ｄは、１≦
ｋ、１≦ａ＜２００、１≦ｂ＜２００、１≦ｃ＜２００
、０≦ｄ＜３００、ａ＋ｂ＋ｃ＋ｄ≦５００の条件を満
たす整数、Ｘは−ＣＦ＿３又は−ＣＨ＿２ＣＨ＿２（Ｃ
Ｆ＿２）−＿ｌ−Ｗ（但し、ｌは１〜８の整数、Ｗは水
素又はフッ素原子））[Scope of Claims] A magnetic recording medium characterized in that a magnetic layer contains an organosilicone compound represented by the following general formula [A]. ▲There are mathematical formulas, chemical formulas, tables, etc.▼ [A] (However, R is a hydrocarbon group with 7 to 21 carbon atoms, R_1, R
_2, R_3 are methyl group or RCOO group, R_4 is a hydrocarbon group having 1 to 20 carbon atoms, k, a, b, c, d are 1≦
k, 1≦a<200, 1≦b<200, 1≦c<200
, 0≦d<300, an integer satisfying the conditions of a+b+c+d≦500, X is -CF_3 or -CH_2CH_2 (C
F_2)-_l-W (where l is an integer from 1 to 8, W is hydrogen or fluorine atom))
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61278774A JPS63133318A (en) | 1986-11-25 | 1986-11-25 | Magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61278774A JPS63133318A (en) | 1986-11-25 | 1986-11-25 | Magnetic recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63133318A true JPS63133318A (en) | 1988-06-06 |
Family
ID=17601995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61278774A Pending JPS63133318A (en) | 1986-11-25 | 1986-11-25 | Magnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63133318A (en) |
-
1986
- 1986-11-25 JP JP61278774A patent/JPS63133318A/en active Pending
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