JPS60220907A - Ferromagnetic resin composition - Google Patents
Ferromagnetic resin compositionInfo
- Publication number
- JPS60220907A JPS60220907A JP59077859A JP7785984A JPS60220907A JP S60220907 A JPS60220907 A JP S60220907A JP 59077859 A JP59077859 A JP 59077859A JP 7785984 A JP7785984 A JP 7785984A JP S60220907 A JPS60220907 A JP S60220907A
- Authority
- JP
- Japan
- Prior art keywords
- resin
- aliphatic carboxylic
- carboxylic acid
- epoxy resin
- magnet
- 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
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
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/0555—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 pressed, sintered or bonded together
- H01F1/0558—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 pressed, sintered or bonded together bonded together
Landscapes
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Epoxy Resins (AREA)
- Hard Magnetic Materials (AREA)
Abstract
Description
【発明の詳細な説明】
〔技術分野〕
本発明はエポキシ樹脂に脂肪族カルボン酸を添加した接
着剤と希土類磁石粉末からなる強磁性樹脂組成物に関す
る。DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a ferromagnetic resin composition comprising an adhesive prepared by adding an aliphatic carboxylic acid to an epoxy resin and rare earth magnet powder.
現在、永久磁石の主流となっているものに焼結型と樹脂
結合型の２つの型がある。焼結型磁石の特徴としては高
いエネルギー積が挙げられ、また衝撃に弱く割れ易いと
言った欠点も持っている。Currently, there are two main types of permanent magnets: sintered type and resin bonded type. Sintered magnets are characterized by a high energy product, but they also have the disadvantage of being weak against shock and easily cracked.
一方樹脂結合型磁石は、結合用の樹脂に熱硬化性樹脂を
用いるか熱可塑性樹脂を用いるかにより２つに分かれる
。熱可塑性樹脂を用いた永久磁石は機械的強度に優れて
いるものの、最大エネルギー積（以下（ＢＨ）ｍａｘと
略す）が希土類磁石粉末を用いた場合でも７〜８（ＭＧ
−Ｏｅ）程度しがなくその用途は限られている。熱硬化
性樹脂を用いた永久磁石は樹脂の量が少なくて済むため
、その（Ｂ Ｈ） ｍａｘは熱可塑性樹脂を用いた磁石
の２倍以上あり、その良好な機械的特性とも合わせて現
在非常に注目されている。熱硬化性樹脂を用いた樹脂結
合型永久磁石（以下単に樹脂結合型磁石と畜く）は従来
適当な粒度に粉砕した磁石粉末と熱硬化性樹脂を単に混
練したものであり、その成形体の密度は低く、磁気性能
も焼結磁石に比べるとまだかなり低いと言った欠点を持
っており、高性能が要求される用途には使用されなかっ
た。On the other hand, resin-bonded magnets are divided into two types depending on whether a thermosetting resin or a thermoplastic resin is used for the bonding resin. Although permanent magnets using thermoplastic resin have excellent mechanical strength, the maximum energy product (hereinafter abbreviated as (BH) max) is 7 to 8 (MG
-Oe) Its uses are limited. Permanent magnets using thermosetting resin require a small amount of resin, so their (BH) max is more than twice that of magnets using thermoplastic resin, and together with their good mechanical properties, they are currently extremely popular. is attracting attention. Resin-bonded permanent magnets using thermosetting resin (hereinafter simply referred to as resin-bonded magnets) are conventionally made by simply kneading magnet powder crushed to an appropriate particle size and thermosetting resin. It has the disadvantages of low density and magnetic performance that is still considerably lower than that of sintered magnets, so it has not been used in applications that require high performance.
本発明はこの様な欠点を改良するために、接着剤として
使用するエポキシ樹脂に脂肪族カルボン酸を添加するこ
とＱこより、樹脂結合型磁石の高性能化を狙ったもので
ある。In order to improve these drawbacks, the present invention aims to improve the performance of resin-bonded magnets by adding aliphatic carboxylic acids to the epoxy resin used as an adhesive.
エポキシ樹脂に脂肪族カルボン酸を添加すると力行肪族
カルボン酸の有する滑性により、粉末−樹脂間の摩擦や
エポキシ樹脂中の極性基間で生じる相互作用を低減する
ために磁石粉末の充填社が増加し、また配向性も向上す
るため磁石の性能は向上する。When an aliphatic carboxylic acid is added to an epoxy resin, due to the lubricity of the aliphatic carboxylic acid, the magnetic powder filling company reduces the friction between the powder and the resin and the interaction that occurs between the polar groups in the epoxy resin. The performance of the magnet improves because the magnetic flux increases and the orientation also improves.
このエポキシ樹脂に添加する脂肪族カルボン酸の化学式
は一般にＲＯＯＯＨで表され、Ｒは炭化水素基を表わす
。Ｒの中にはアルキル基のような飽和炭イビ水素基の他
、二重結合を含んでいる不飽和炭化水素基、炭化水素基
中の水素原子が水酸基（−ＯＨ）で置換されたもの、そ
して環状の炭化水素基を持ったものがある。またカルボ
キシル基（−Ｃ！０ＯＨ）を２つ持った脂肪族ジカルボ
ン酸も含まれる。これらの中の代表的なものとしてはカ
プリル酸、ペラルゴン酸、ミリスチン酸、ツクルミチン
酸、ステアリン酸、ベーヘン酸、オレイン酸、エルカ酸
、リノール酸、リルン酸、ゴルリン酸、サビニン酸、リ
シルイン酸そしてタブシア酸などがある。The chemical formula of the aliphatic carboxylic acid added to this epoxy resin is generally represented by ROOOH, where R represents a hydrocarbon group. In addition to saturated hydrocarbon groups such as alkyl groups, R includes unsaturated hydrocarbon groups containing double bonds, hydrocarbon groups in which the hydrogen atom is substituted with a hydroxyl group (-OH), Then there are those with a cyclic hydrocarbon group. Also included are aliphatic dicarboxylic acids having two carboxyl groups (-C!0OH). Typical of these are caprylic acid, pelargonic acid, myristic acid, tukurumitic acid, stearic acid, behenic acid, oleic acid, erucic acid, linoleic acid, lylunic acid, golulic acid, sabinic acid, lycyllic acid, and tabusia. There are acids, etc.
エポキシ樹脂に添加する脂肪族カルボン酸の鼠は５〜４
０重量％が適当であり、５重斑％以下では効果が少なく
、４０重量％以上では磁石の機械的強度に悪影響を及ぼ
す。また磁石中の接着剤の量は０．５〜５重世％が適当
である。尚、脂肪族カルボン酸の添加量と接着剤の添加
量はともに保磁力（以下１Ｈｃと略す）には形動を与え
ない。The amount of aliphatic carboxylic acid added to epoxy resin is 5 to 4
0% by weight is appropriate, less than 5% by weight has little effect, and more than 40% by weight has an adverse effect on the mechanical strength of the magnet. The appropriate amount of adhesive in the magnet is 0.5 to 5% by weight. Note that neither the amount of aliphatic carboxylic acid added nor the amount of adhesive added has any effect on coercive force (hereinafter abbreviated as 1Hc).
以下、本発明について実施例に基づき詳細に説明する。 Hereinafter, the present invention will be described in detail based on examples.
〈実施例１〉
Ｓｍ（０００，６１４（１！ｕＯ，０７Ｆｅ０．３０
Ｚｒ０．０１６）フ８の組成をした合金を低周波溶解炉
を用いＡｒガス中で溶１η′しインゴットを作る。この
インゴットに溶体化処理そして時効処理などの熱処理を
行ない、その後このインゴットをボールミルで粒径が２
μｍ〜８０μｍの範囲になるまで粉砕する。第１表に示
す脂肪族カルボン酸をエポキシ樹脂に２０重足％添加し
均一に分散するまで攪拌する。この接着剤を前述の磁石
粉末に２．０重量％添加し混練機で混練する。この混練
物を磁場中（２０ＫＯｅ）でプレス成形し、その後１５
０°Ｃ×１時間加熱する。<Example 1> Sm(000,614(1!uO,07Fe0.30
An ingot is made by melting an alloy having the composition of Zr0.016) F8 in Ar gas using a low frequency melting furnace. This ingot is subjected to heat treatment such as solution treatment and aging treatment, and then this ingot is milled in a ball mill to reduce the particle size to 2.
Grind to a size in the range of μm to 80 μm. Add 20% by weight of the aliphatic carboxylic acid shown in Table 1 to the epoxy resin and stir until uniformly dispersed. 2.0% by weight of this adhesive was added to the above-mentioned magnet powder and kneaded using a kneader. This kneaded material was press-molded in a magnetic field (20KOe), and then
Heat at 0°C for 1 hour.
得られた磁石の磁気性能を第２表に示す。脂肪族カルボ
ン酸を汐加したエポキシ樹脂を使用した磁石は、比較例
にくらべて残留磁束密度（以下ＢｒＫ
と略す）、角型性５Ｑ（−、／、ヨ。）が増加し、それ
につれて（Ｂ Ｈ） ｍａｘも大きく増加している。The magnetic performance of the obtained magnet is shown in Table 2. The magnet using the epoxy resin added with aliphatic carboxylic acid has increased residual magnetic flux density (hereinafter abbreviated as BrK) and squareness 5Q (-, /, y) compared to the comparative example. BH) max has also increased significantly.
第 １ 表
第 ２ 表
〈実施例２〉
脂肪族カルボン酸にオレイン酸を用い、オレイン酸のエ
ポキシ樹脂への添加蓋を変えた接着剤について、実施例
１と同じ方法で磁石を成形する。Table 1 Table 2 (Example 2) A magnet is molded in the same manner as in Example 1 using an adhesive in which oleic acid is used as the aliphatic carboxylic acid and the lid for adding oleic acid to the epoxy resin is changed.
得られた磁石の磁気性能を第１図に示す。オレイン酸の
添加量は５〜４０重量％が望ましいと言える。The magnetic performance of the obtained magnet is shown in FIG. It can be said that the amount of oleic acid added is preferably 5 to 40% by weight.
〈実施例５〉
脂肪族カルボン酸にオレイン酸を用い、オレイン酸のエ
ポキシ樹脂への添加量は２０重量％とする。この接着剤
の磁石粉末への添加蓋を変えて磁石を製造する。尚、磁
石の＠遣方法は実施例１と同じとする。この磁石の磁気
性能を第２図に示す。第２図より接着剤の量は０．５〜
５重姐％であることが望ましい。<Example 5> Oleic acid is used as the aliphatic carboxylic acid, and the amount of oleic acid added to the epoxy resin is 20% by weight. Magnets are manufactured by changing the way in which this adhesive is added to the magnet powder. Note that the @ method for the magnet is the same as in the first embodiment. The magnetic performance of this magnet is shown in Figure 2. From Figure 2, the amount of adhesive is 0.5~
It is desirable that the content is 5% by weight.
〈実施例４〉
第３表に示されている組成の希土類磁石粉末について、
接着剤にオレイン酸を添加した系と従来法（エポキシ樹
脂のみ）の２通りで磁石を製造する。製造方法は実施例
１と同じである。磁石の磁気性能を第３図に示す。<Example 4> Regarding rare earth magnet powder having the composition shown in Table 3,
Magnets are manufactured using two methods: a system in which oleic acid is added to the adhesive, and a conventional method (using only epoxy resin). The manufacturing method is the same as in Example 1. Figure 3 shows the magnetic performance of the magnet.
第３図より本発明の強磁性樹脂組成物は従来の樹脂磁石
にくらべて、希土類磁石組成に関係なく高い磁気性能を
有することが判る。It can be seen from FIG. 3 that the ferromagnetic resin composition of the present invention has higher magnetic performance than conventional resin magnets, regardless of the composition of the rare earth magnet.
以上の説明の通り、不発明により樹脂結合型永久磁石の
大きな欠点であった低性能が克服されたことにより、高
性能樹脂結合型永久磁石の量産が可能となった。As explained above, the low performance, which was a major drawback of resin-bonded permanent magnets, was overcome through uninvention, and it became possible to mass-produce high-performance resin-bonded permanent magnets.
第１図はエポキシ樹脂へのオレイン酸の添加量と強磁性
樹脂組成物の磁気性能の関係を表したグラフ。
第２図は接着剤の添加蓋と強磁性樹脂組成物の磁気性能
の関係を表したグラフ。
第５図は希土類磁石粉末の組成を替えたときの、本発明
の強磁性樹脂組成物と従来の樹脂磁石との磁気性能の比
較。
以 上
出願人 株式会社諏訪精工舎
代理人 弁理士 最上 務
第１図
Ｑ、Ｑ ４１，０ ２，０ う、ＣＩ Ａ、Ｑ ５．０
’ Ｇ、０ ７．０棲 １列 １７１童 簿量ヅ。）
第２面
６ ７ ８ ９
’ｂｋ ”Ｐ’ｌ Ｎｏ。
第３図FIG. 1 is a graph showing the relationship between the amount of oleic acid added to an epoxy resin and the magnetic performance of a ferromagnetic resin composition. FIG. 2 is a graph showing the relationship between the adhesive additive and the magnetic performance of the ferromagnetic resin composition. FIG. 5 is a comparison of magnetic performance between the ferromagnetic resin composition of the present invention and a conventional resin magnet when the composition of the rare earth magnet powder is changed. Applicant Suwa Seikosha Co., Ltd. Agent Patent Attorney Mogami Figure 1 Q, Q 41,0 2,0 U, CI A, Q 5.0
'G, 0 7.0 living 1 row 171 children's book amount ㅅ. ) 2nd side 6 7 8 9 'bk "P'l No. Figure 3
Claims (2)
着剤と希土類磁石粉末からなる混合物を磁場中でプレス
成形して得られることを特徴とする強磁性樹脂組成物。(1) A ferromagnetic resin composition obtained by press-molding a mixture of an adhesive prepared by adding an aliphatic carboxylic acid to an epoxy resin and rare earth magnet powder in a magnetic field.
ボン酸のエポキシ樹脂に対する添加量が５〜４０重ｉＩ
ｋ％であることを特徴とする強磁性樹脂組成、物（３）
特許請求の範囲第（１）項において、強磁性樹脂組成物
中の接着剤の量をｏ、 ５〜５重量％とすることを特徴
とする強磁性側Ｂ′ｄ組成物。(2) In claim (1), the amount of aliphatic carboxylic acid added to the epoxy resin is 5 to 40
Ferromagnetic resin composition characterized by k% (3)
The ferromagnetic side B'd composition according to claim (1), characterized in that the amount of adhesive in the ferromagnetic resin composition is 5 to 5% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59077859A JPS60220907A (en) | 1984-04-18 | 1984-04-18 | Ferromagnetic resin composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59077859A JPS60220907A (en) | 1984-04-18 | 1984-04-18 | Ferromagnetic resin composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60220907A true JPS60220907A (en) | 1985-11-05 |
Family
ID=13645783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59077859A Pending JPS60220907A (en) | 1984-04-18 | 1984-04-18 | Ferromagnetic resin composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60220907A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63244705A (en) * | 1987-03-31 | 1988-10-12 | Seiko Epson Corp | Resin-bonded rare earth/iron magnet |
| JPH03142906A (en) * | 1989-10-30 | 1991-06-18 | Fuji Elelctrochem Co Ltd | Manufacture of bond magnet |
| JPH04115505A (en) * | 1990-09-05 | 1992-04-16 | Fuji Elelctrochem Co Ltd | Preparation of bond magnet |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5754304A (en) * | 1980-09-19 | 1982-03-31 | Seiko Epson Corp | Manufacture of permanent magnet |
-
1984
- 1984-04-18 JP JP59077859A patent/JPS60220907A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5754304A (en) * | 1980-09-19 | 1982-03-31 | Seiko Epson Corp | Manufacture of permanent magnet |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63244705A (en) * | 1987-03-31 | 1988-10-12 | Seiko Epson Corp | Resin-bonded rare earth/iron magnet |
| JPH03142906A (en) * | 1989-10-30 | 1991-06-18 | Fuji Elelctrochem Co Ltd | Manufacture of bond magnet |
| JPH04115505A (en) * | 1990-09-05 | 1992-04-16 | Fuji Elelctrochem Co Ltd | Preparation of bond magnet |
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