JPH0311528B2 - - Google Patents
Info
- Publication number
- JPH0311528B2 JPH0311528B2 JP57086426A JP8642682A JPH0311528B2 JP H0311528 B2 JPH0311528 B2 JP H0311528B2 JP 57086426 A JP57086426 A JP 57086426A JP 8642682 A JP8642682 A JP 8642682A JP H0311528 B2 JPH0311528 B2 JP H0311528B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic powder
- magnetic
- ether
- amino ether
- polyoxyethylene stearyl
- 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 - Lifetime
Links
- 239000006247 magnetic powder Substances 0.000 claims description 22
- -1 polyoxyethylene stearyl amino ether Polymers 0.000 claims description 18
- 239000002184 metal Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 12
- 230000005291 magnetic effect Effects 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 7
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 6
- 239000000243 solution Substances 0.000 description 5
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000005294 ferromagnetic effect Effects 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 229940044175 cobalt sulfate Drugs 0.000 description 2
- 229910000361 cobalt sulfate Inorganic materials 0.000 description 2
- KTVIXTQDYHMGHF-UHFFFAOYSA-L cobalt(2+) sulfate Chemical compound [Co+2].[O-]S([O-])(=O)=O KTVIXTQDYHMGHF-UHFFFAOYSA-L 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 241000221535 Pucciniales Species 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 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
- 235000003891 ferrous sulphate Nutrition 0.000 description 1
- 239000011790 ferrous sulphate Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 1
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- SBOJXQVPLKSXOG-UHFFFAOYSA-N o-amino-hydroxylamine Chemical compound NON SBOJXQVPLKSXOG-UHFFFAOYSA-N 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229910000033 sodium borohydride Inorganic materials 0.000 description 1
- 239000012279 sodium borohydride Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 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
- 238000003756 stirring Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/06—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder
- H01F1/061—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder with a protective layer
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
- Paints Or Removers (AREA)
- Powder Metallurgy (AREA)
- Magnetic Record Carriers (AREA)
- Hard Magnetic Materials (AREA)
Description
【発明の詳細な説明】 本発明は金属又は合金磁性粉に関する。[Detailed description of the invention] The present invention relates to metal or alloy magnetic powder.
近年記録装置の進歩にともない、それに使用さ
れる磁気記録媒体も記録の高密度化が要求される
ようになつて来た。 In recent years, as recording devices have progressed, the magnetic recording media used therein have been required to have higher recording densities.
従来より一番広く使用されている磁気記録媒体
は、ポリエステル等のフイルムに磁性層を塗設し
たもの（例えば磁気テープ、磁気シート）である
が、この磁性層に使用される磁性粉で、磁気記録
の高密度化の要求に合うものとして強磁性金属磁
性粉が知られている。しかるにこの強磁性金属磁
石粉は経時変化による（即ち錆びることによる）
特性劣化が著しく、磁気記録媒体用磁性粉として
期待され商品化もされているが、未だ上述した点
では不十分であり問題がある。 Traditionally, the most widely used magnetic recording medium is a film made of polyester or the like coated with a magnetic layer (e.g. magnetic tape, magnetic sheet). Ferromagnetic metal magnetic powder is known as a material that meets the demand for higher density recording. However, this ferromagnetic metal magnet powder changes over time (i.e., rusts).
The characteristics deteriorate significantly, and although it is expected to be used as a magnetic powder for magnetic recording media and has been commercialized, it is still insufficient in the above points and has problems.
そこで、この欠点を解消するために本発明者等
は種々の検討を行つた結果、強磁性金属又は合金
磁性粉の表面にポリオキシエチレンステアリルア
ミノエーテルを付着処理させると、前記の欠点が
解消されるという知見を得、本発明はこの知見に
基づいてなされたものである。 Therefore, in order to eliminate this drawback, the present inventors conducted various studies and found that the above-mentioned drawback could be resolved by attaching polyoxyethylene stearyl amino ether to the surface of ferromagnetic metal or alloy magnetic powder. The present invention was made based on this knowledge.
以下、比較例及び実施例を示す。 Comparative examples and examples are shown below.
比較例 １
濃度0.5モル／の硫酸第１鉄と0.5モル／の
硫酸コバルトの溶液５の混合水溶液に濃度1.0
モル／の水素化ほう素ナトリウム水溶液５を
定速混合させながら2000ガウスの磁場中で反応さ
せ磁性粉を得た。得られた磁性粉を試料Ａとす
る。Comparative Example 1 A mixed aqueous solution of solution 5 of ferrous sulfate with a concentration of 0.5 mole/cobalt sulfate and cobalt sulfate with a concentration of 0.5 mole/concentration of 1.0
A mol/mol sodium borohydride aqueous solution 5 was reacted in a magnetic field of 2000 Gauss while being mixed at a constant rate to obtain magnetic powder. The obtained magnetic powder is referred to as sample A.
比較例 ２
針状酸化鉄粉（α−Fe2O3）100ｇをレトルト
に入れ温度400℃の窒素ガス中で２時間（流量15
／min）熱処理した後、水素ガス中で４時間
（流量15／min）還元した。ここで得られた磁
性粉を試料Ｂとする。Comparative Example 2 100 g of acicular iron oxide powder (α-Fe 2 O 3 ) was placed in a retort and heated in nitrogen gas at a temperature of 400°C for 2 hours (flow rate: 15
/min) After heat treatment, reduction was performed in hydrogen gas for 4 hours (flow rate 15/min). The magnetic powder obtained here is referred to as Sample B.
実施例 １
比較例１で得られた磁性粉をポリオキシエチレ
ンラウリルアミノエーテル、ポリオキシエチレン
ステアリルアミノエーテル、ポリオキシプロピレ
ンラウリルアミドエーテル、ラウリルメリハイド
ロキシエチルアミンパーオキサイド、ポリオキシ
エチレンジアルキルアミノエーテル、の各々２％
トルエン溶液500ｇ中に入れ、よく撹拌分散させ
た後、ろ過乾燥させ磁性粉を得た。これらを夫々
試料Ｃ、Ｄ、Ｅ、Ｆ、Ｇとする。Example 1 The magnetic powder obtained in Comparative Example 1 was mixed with each of polyoxyethylene lauryl amino ether, polyoxyethylene stearyl amino ether, polyoxypropylene lauryl amide ether, lauryl melihydroxyethylamine peroxide, and polyoxyethylene dialkylamino ether. 2%
The mixture was poured into 500 g of toluene solution, stirred and dispersed well, and then filtered and dried to obtain magnetic powder. These are designated as samples C, D, E, F, and G, respectively.
実施例 ２
比較例２で得られた磁性粉をポリオキシエチレ
ンラウリルアミノエーテル、ポリオキシエチレン
ステアリルアミノエーテル、ポリオキシプロピレ
ンラウリルアミドエーテル、ラウリルトリハイド
ロキシエチルアミンパーオキサイド、ポリオキシ
エチレンジアルキルアミノエーテル、の各々２％
トルエン溶液500ｇの中に入れ、よく撹拌分散さ
せた後、ろ過乾燥させ磁性粉を得た。これを夫々
試料Ｈ、Ｉ、Ｊ、Ｋ、Ｌとする。Example 2 The magnetic powder obtained in Comparative Example 2 was mixed with each of polyoxyethylene lauryl amino ether, polyoxyethylene stearyl amino ether, polyoxypropylene lauryl amide ether, lauryl trihydroxyethylamine peroxide, and polyoxyethylene dialkylamino ether. 2%
The mixture was poured into 500 g of toluene solution, stirred and dispersed well, and then filtered and dried to obtain magnetic powder. These are designated as samples H, I, J, K, and L, respectively.
実施例 ３
比較的２で得られた磁性粉をポリオキシエチレ
ンステアリルアミノエーテルの濃度を夫々0.5％、
1.0％、2.0％、3.0％、5.0％、6.0％としたトルエ
ン溶液500ｇの中に入れよく撹拌分散させた後、
ろ過乾燥させ磁性粉を得た。これらを夫々試料
Ｍ、Ｎ、Ｏ、Ｐ、Ｑ、Ｒ、とする。Example 3 The magnetic powder obtained in Comparative Example 2 was mixed with a concentration of polyoxyethylene stearyl amino ether of 0.5% and 0.5%, respectively.
After pouring into 500 g of toluene solution containing 1.0%, 2.0%, 3.0%, 5.0%, and 6.0% and stirring well to disperse,
It was filtered and dried to obtain magnetic powder. These are designated as samples M, N, O, P, Q, and R, respectively.
以上の比較例及び実施例で得られた磁性粉を温
度50℃相対湿度80％の条件の雰囲気中に放置し、
それの飽和磁束密度σsの経時変化を試べた。その
結果を第１図から第３図に示す。これら図から明
らかな如く、本発明になる金属又は合金磁性粉は
経時変化がほとんど起らないことがわかる。より
詳しく検討すると、第１図は湿式還元法で製造し
た磁性粉に対する処理を示すもので、未処理の試
料Ａに対して、各種処理剤を用いると、磁性粉の
安定性が相当に向上し、中でもポリオキシエチレ
ンステアリルアミノエーテルは安定性を格段に向
上させることが分る（試料Ｄ）。第２図は乾式還
元法で製造した磁性粉に対する処理を示すもの
で、未処理の試料Ｂに対して各種処理剤は第１図
に示したものと同様な効果を示し、特にポリオキ
シエチレンステアリルアミノエーテルは格段の効
果を奏することが分る（試料Ｉ）。第３図はポリ
オキシエチレンステアリルアミノエーテルの量的
結果を示し、少量の含有でも十分に大きい安定化
効果が得られること、特にポリオキシエチレンス
テアリルアミノエーテルのトルエン溶液に対する
濃度が1.5％以上であるとその効果がさらに顕著
になることがわかる。 The magnetic powders obtained in the above comparative examples and examples were left in an atmosphere with a temperature of 50°C and a relative humidity of 80%,
We investigated the change in saturation magnetic flux density σ s over time. The results are shown in FIGS. 1 to 3. As is clear from these figures, the metal or alloy magnetic powder according to the present invention shows almost no change over time. When examined in more detail, Figure 1 shows the treatment of magnetic powder produced by the wet reduction method, and it was found that when various treatment agents were used on untreated sample A, the stability of the magnetic powder was significantly improved. Among them, polyoxyethylene stearyl amino ether was found to significantly improve stability (Sample D). Figure 2 shows the treatment of magnetic powder produced by the dry reduction method. Various treatment agents showed the same effects as those shown in Figure 1 on untreated sample B, especially polyoxyethylene stearyl. It can be seen that aminoether has a remarkable effect (Sample I). Figure 3 shows the quantitative results of polyoxyethylene stearyl amino ether, and shows that a sufficiently large stabilizing effect can be obtained even in a small amount, especially when the concentration of polyoxyethylene stearyl amino ether in toluene solution is 1.5% or more. It can be seen that the effect becomes even more pronounced.
以上の如く本発明になる磁性粉は磁気記録媒体
用として好適なものである。 As described above, the magnetic powder of the present invention is suitable for use in magnetic recording media.
第１図より第３図は本発明になる磁性粉と、そ
れと比較される磁性粉の特性図である。
FIGS. 1 to 3 are characteristic diagrams of the magnetic powder according to the present invention and the magnetic powder to be compared with it.
Claims (1)
ルを付着させてなる金属又は合金磁性粉。1 Metal or alloy magnetic powder to which polyoxyethylene stearyl amino ether is attached.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57086426A JPS58204503A (en) | 1982-05-24 | 1982-05-24 | Metal or alloy magnetic powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57086426A JPS58204503A (en) | 1982-05-24 | 1982-05-24 | Metal or alloy magnetic powder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58204503A JPS58204503A (en) | 1983-11-29 |
| JPH0311528B2 true JPH0311528B2 (en) | 1991-02-18 |
Family
ID=13886566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57086426A Granted JPS58204503A (en) | 1982-05-24 | 1982-05-24 | Metal or alloy magnetic powder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58204503A (en) |
-
1982
- 1982-05-24 JP JP57086426A patent/JPS58204503A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58204503A (en) | 1983-11-29 |
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