JPS5834437B2 - Ferrite magnet powder for mixing with explosives - Google Patents
Ferrite magnet powder for mixing with explosivesInfo
- Publication number
- JPS5834437B2 JPS5834437B2 JP53068957A JP6895778A JPS5834437B2 JP S5834437 B2 JPS5834437 B2 JP S5834437B2 JP 53068957 A JP53068957 A JP 53068957A JP 6895778 A JP6895778 A JP 6895778A JP S5834437 B2 JPS5834437 B2 JP S5834437B2
- Authority
- JP
- Japan
- Prior art keywords
- explosives
- ferrite magnet
- magnet powder
- mixing
- explosive
- 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
Landscapes
- Hard Magnetic Materials (AREA)
- Soft Magnetic Materials (AREA)
Description
【発明の詳細な説明】
本発明は爆薬に関しミ特に爆薬に混入するフェライト磁
石粉末に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to explosives, and more particularly to ferrite magnet powder mixed into explosives.
従来、ダイナマイト等の爆薬の保管上の問題及び不発残
留爆薬の発見等の目的のために、爆薬と磁石とを一体に
して用いることが知られている。2. Description of the Related Art Conventionally, it has been known to use an explosive and a magnet in one body for storage problems of explosives such as dynamite and for the purpose of finding unexploded residual explosives.
この一体化の一つの方法として磁石粉末を爆薬に混入さ
せる方法が知られている。One known method for this integration is to mix magnetic powder into explosives.
この場合、磁石粉末としてフェライト磁石を使用する場
合、保存中に爆薬の化学的変化を生ずることがわかった
。In this case, it has been found that the use of ferrite magnets as magnet powder causes chemical changes in the explosive during storage.
これは、フェライト磁石と爆薬とのｐＨの相違にもとづ
くものと考えられる。This is considered to be based on the difference in pH between the ferrite magnet and the explosive.
フェライト磁石は周知のように、弱アルカリ性であり、
一方爆薬は主に硝酸のエステル化合物であり弱酸性であ
るため、両者の接触によって化学反応が起り、爆薬の経
時変化が生ずるものである。As is well known, ferrite magnets are weakly alkaline.
On the other hand, since explosives are mainly ester compounds of nitric acid and are weakly acidic, a chemical reaction occurs when the two come into contact, causing deterioration of the explosive over time.
従って、本発明の主たる目的は、化学的に安定なフェラ
イト磁石粉末混入爆薬を提供することである。Accordingly, a principal object of the present invention is to provide a chemically stable explosive containing ferrite magnet powder.
磁石粉末混入の一つの目的は、上述のように保管上の問
題を解決することであるが、−例として、盗難した爆薬
の磁気探知を可能にしているが、保管爆薬の紛失や、発
見が目視によって鮮明に見分けられればより好斗しい。One purpose of magnetic powder incorporation is to solve storage problems as mentioned above - for example, it enables magnetic detection of stolen explosives, but it also prevents stored explosives from being lost or found. It would be better if you could clearly distinguish them visually.
このため、本発明は、外観色を所定の色にして、外観上
鮮明に見分けることのできるフェライト磁石粉末入り爆
薬を提供することを目的とする。Therefore, an object of the present invention is to provide an explosive containing ferrite magnet powder that has a predetermined external color and can be clearly distinguished from the external appearance.
本発明は、硝酸エステル化合物及び又は硝酸塩を主成分
とする爆薬に混入するフェライト磁石粉末の各粒子をポ
リマー被膜で被覆したことを特徴とするものである。The present invention is characterized in that each particle of ferrite magnet powder mixed into an explosive whose main component is a nitrate ester compound and/or a nitrate is coated with a polymer film.
この結果、混入したフェライト磁石粉末が爆薬に直接接
触することなく、ポリマー被膜で互に隔絶されるので、
爆薬の化学的安定性を損なうことがない。As a result, the mixed ferrite magnet powder does not come into direct contact with the explosive, and is isolated from each other by the polymer coating.
Does not impair the chemical stability of the explosive.
実施例 １
フェライト磁石粉末を入れた触媒溶液中にメチルメタク
リレートのモノマーを入れて共重合させフェライト磁石
粉末の表面にポリマーの被覆を形成させた後７０℃の温
水にて洗浄し１００℃にて乾燥させてポリメチルメタク
リレートで被覆されたフェライト磁石粉末を得る。Example 1 A methyl methacrylate monomer was added to a catalyst solution containing ferrite magnet powder and copolymerized to form a polymer coating on the surface of the ferrite magnet powder, then washed with hot water at 70°C and dried at 100°C. A ferrite magnet powder coated with polymethyl methacrylate is obtained.
爆薬の安定性試験に耐熱試験があり、上記方法にて３係
（重量％）のポリメチルメタクリレートで被覆されたフ
ェライト磁石粉末を２号覆ダイナマイトに１０％（重量
％）混入したときの耐熱試験値を被覆処理されないフェ
ライト磁石粉末と対比して示すと次の通りである。There is a heat resistance test in the stability test of explosives, and the heat resistance test is performed when 10% (weight %) of ferrite magnet powder coated with polymethyl methacrylate of 3 parts (weight %) is mixed into No. 2 coated dynamite using the above method. The values are shown below in comparison with ferrite magnet powder that is not coated.
上記実施例において、被覆剤に所定の色の着色剤を混入
しておけば、フェライト磁石粉末は所定の色を有し、こ
れを混入した爆薬は、外観上、その色を有するので、爆
薬を鮮明に見分けることが可能となる。In the above example, if a colorant of a predetermined color is mixed into the coating material, the ferrite magnet powder will have a predetermined color, and the explosive mixed with this will have that color in appearance, so the explosive It becomes possible to clearly distinguish them.
捷た、上記において爆薬に混入するフェライト磁石の種
類やその割合を爆薬毎に変えてトけば、発見した爆薬の
出所を、混入した磁石粉末を分析することによって容易
に知ることができる。By changing the types and proportions of ferrite magnets mixed into the explosives in the above process, it is possible to easily determine the source of the discovered explosives by analyzing the mixed magnetic powder.
な釦、上記実施例では、被膜物質としてメチルメタクリ
レートを用いたが、その他スチレン、アクリレートリル
、ブタジェン、酢酸ビニール、アクリル酸、メチルアク
リレート、アルキド樹脂等、化学的に安定な樹脂であれ
ば何でも用いられることは明らかであろう。In the above examples, methyl methacrylate was used as the coating material, but any other chemically stable resin such as styrene, acrylate, butadiene, vinyl acetate, acrylic acid, methyl acrylate, alkyd resin, etc. can be used. It is clear that
Claims (1)
爆薬中に混入するためのフェライト磁石粉末において、
該粉末の各粒子がポリマー被膜で被覆されていることを
特徴とする爆薬混入用のフェライト磁石粉末。 ２、特許請求の範囲第１項記載の爆薬混入用のフェライ
ト磁石粉末において、上記ポリマー被膜が所定の色の有
色剤で着色されていることを特徴とするもの。[Claims] 1. Ferrite magnet powder to be mixed into explosives containing nitrate ester compounds and/or nitrates as main components,
A ferrite magnet powder for use in mixing explosives, characterized in that each particle of the powder is coated with a polymer film. 2. A ferrite magnet powder for mixing with explosives according to claim 1, characterized in that the polymer coating is colored with a predetermined coloring agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP53068957A JPS5834437B2 (en) | 1978-06-09 | 1978-06-09 | Ferrite magnet powder for mixing with explosives |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP53068957A JPS5834437B2 (en) | 1978-06-09 | 1978-06-09 | Ferrite magnet powder for mixing with explosives |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54160708A JPS54160708A (en) | 1979-12-19 |
| JPS5834437B2 true JPS5834437B2 (en) | 1983-07-26 |
Family
ID=13388653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP53068957A Expired JPS5834437B2 (en) | 1978-06-09 | 1978-06-09 | Ferrite magnet powder for mixing with explosives |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5834437B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5782196A (en) * | 1980-11-11 | 1982-05-22 | Tohoku Metal Ind Ltd | Manufacture of explosive mixing ferrite composition |
| JPS5782195A (en) * | 1980-11-11 | 1982-05-22 | Tohoku Metal Ind Ltd | Stabilization of explosive mixing ferrite magnetic material |
-
1978
- 1978-06-09 JP JP53068957A patent/JPS5834437B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS54160708A (en) | 1979-12-19 |
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