JP3389752B2 - Plastic magnetic composition (A) - Google Patents
Plastic magnetic composition (A)Info
- Publication number
- JP3389752B2 JP3389752B2 JP22832895A JP22832895A JP3389752B2 JP 3389752 B2 JP3389752 B2 JP 3389752B2 JP 22832895 A JP22832895 A JP 22832895A JP 22832895 A JP22832895 A JP 22832895A JP 3389752 B2 JP3389752 B2 JP 3389752B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- parts
- polyamide
- metal powder
- magnetic metal
- 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 - Fee Related
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
- H01F1/06—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
- H01F1/08—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 pressed, sintered, or bound together
- H01F1/083—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 pressed, sintered, or bound together in a bonding agent
Description
【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明は、ポリアミド樹脂と磁性
金属粉末を主成分とするプラスチック磁性組成物に関す
るものである。
【０００２】
【従来の技術】近年、熱可塑性樹脂（例えば、ポリエチ
レン樹脂、ポリ塩化ビニル樹脂、エチレン−酢酸ビニル
共重合体、ポリアミド樹脂など）と磁性金属粉末を主成
分とするプラスチック磁性組成物を射出成形等によって
成形したプラスチック磁石が、従来の焼結磁石に代わっ
て、モーター、スイッチ等の電気部品に広く用いられつ
つある。特にポリアミド樹脂は耐熱性、機械的特性に優
れていることから、使用されることが多い。
【０００３】このプラスチック磁石は、磁性金属粉末の
配合量と磁気特性が相関するため、高い磁気特性を得よ
うとすると磁性金属粉末を高濃度に充填させたプラスチ
ック磁性組成物を使用する必要があった。そこで、磁性
金属粉末の配合量を多くしようとするとき、わずかなポ
リアミド樹脂でもプラスチック磁石を形成できるように
磁性金属粉末の表面をアミン系カップリング剤で処理
し、磁性金属粉末にポリアミド樹脂との親和性を付与し
て、プラスチック磁石に機械的強度を持たせる方法が広
く行われている。
【０００４】しかし、ポリアミド樹脂にアミン系カップ
リング剤処理された磁性金属粉末を溶融混練すると徐々
に粘度が増加して、スクリューに大きな負荷がかかるこ
とになる。また、射出成形において発生するスプルー、
ランナーを粉砕したものを一定割合で混合して成形用材
料とすることは広く行われているが、このように何度も
熱を加えられると特に増粘が著しい。
【０００５】
【発明が解決しようとする課題】本発明は、ポリアミド
樹脂をバインダーとするプラスチック磁性組成物におい
て、カップリング剤処理した磁性金属粉末を使用する場
合に加熱・混練により粘度が上昇し、混練、成形が困難
になるという問題点を簡便な方法で防止することを目的
としている。
【０００６】
【課題を解決するための手段】本発明者は、前述の問題
点を解決するため鋭意研究した結果、ポリアミド樹脂と
磁性金属粉末に分子内に２個以上のカルボキシル基をも
つカルボン酸無水物を配合することにより、溶融混練、
成形のときに増粘が抑えられ、流動性に優れたプラスチ
ック磁性組成物が得られて、その組成物から得られた成
形体は高い耐熱性、機械的特性を有していると共に磁気
特性に優れており、外観の優れた成形品が得られること
を見いだし、この発明を完成した。
【０００７】本発明は、（Ａ）ポリアミド樹脂１００重
量部と、（Ｂ）アミン系カップリング剤処理された磁性
金属２００〜２０００重量部と、（Ｃ）無水フタル酸、
無水マレイン酸、無水トリメリト酸及び無水ピロメリト
酸から選択される分子内に２個以上のカルキシル基をも
つカルボン酸無水物を、ポリアミド樹脂アミノ末端基１
００グラム当量当たり５０〜１０００グラム当量とを溶
融混練することを特徴とするプラスチック磁性組成物に
関する。
【０００８】本発明におけるポリアミドとしては、ポリ
アミド６、ポリアミド１１、ポリアミド１２などのポリ
ラクタム類、ポリアミド６６、ポリアミド６１０、ポリ
アミド６１２などのジカルボン酸とジアミンとから得ら
れるポリアミド類、ポリアミド６／６６、ポリアミド６
／６１０、ポリアミド６／１２、ポリアミド６／６１
２、ポリアミド６／６６／６１０、ポリアミド６／６６
／１２、ポリアミド６／６Ｔ（Ｔ：テレフタル酸成分）
などの共重合ポリアミド類、これらの混合物などが挙げ
られる。特に、ポリアミド６、ポリアミド１２、ポリア
ミド６／１２、これらの混合物を使用することが好まし
い。
【０００９】本発明における磁性金属粉末としては、プ
ラスチック磁石に使用することができる公知の磁性金属
粉末であれば、どのような種類の磁性金属粉末であって
もよい。特に、粒子径が０．５〜１０μｍ、好ましくは
１．０〜５．０μｍのバリウムフェライト、ストロンチ
ウムフェライトなどのハードフェライト粉末、またはそ
の混合物を使用することが好ましい。
【００１０】本発明に使用される磁性金属粉末の使用量
は、ポリアミド樹脂１００重量部に対して２００〜２０
００重量部、好ましくは４００〜１２００重量部であ
る。磁性金属粉末の使用量が２００重量部未満では磁性
金属粉末の配合割合が減少することにより磁気特性が低
下することになり、２０００重量部を超えるとプラスチ
ック磁石として成形することが不可能である。
【００１１】本発明に使用される磁性金属粉末はアミン
系カップリング剤で処理されたものを用いるが、アミン
系カップリング剤としてはＮ−β−アミノエチル−γ−
アミノプロピル−トリメトキシシラン、Ｎ−β−アミノ
エチル−γ−アミノプロピル−メチルジメトキシシラ
ン、γ−アミノプロピルトリエトキシシランなどが挙げ
られる。
【００１２】本発明における分子内に２個以上のカルボ
キシル基をもつカルボン酸無水物としては、無水フタル
酸、無水マレイン酸、無水トリメリト酸及び無水ピロメ
リト酸が挙げられる。
【００１３】本発明で使用されるカルボン酸無水物の使
用量は、ポリアミド樹脂アミノ末端基１００グラム当量
当り５０〜１０００グラム当量、好ましくは６０〜５０
０グラム当量である。カルボン酸の使用量が５０グラム
当量未満では増粘防止の点で効果が見られない。また、
１０００グラム当量を超えるとプラスチック磁石の機械
的特性が悪化する。
【００１４】この発明のポリアミド樹脂組成物は、要求
される特性に応じて他の添加剤、例えば耐熱剤，紫外線
吸収剤を含む耐候剤，難燃剤，帯電防止剤，滑剤，可塑
剤，核剤，発泡剤，着色剤，安定剤，カップリング剤な
どを含有することができる。
【００１５】
【実施例】以下、実施例及び比較例により、この発明を
さらに詳しく説明する。
【００１６】プラスチック磁性組成物は、ポリアミド樹
脂とアミン系カップリング剤処理した磁性金属粉末、カ
ルボン酸無水物を溶融混練することにより得た。
【００１７】プラスチック磁性組成物の溶融混練におけ
る増粘の程度については、ラボプラストミル（ミキサー
タイプＤ−２００ＥＸ、温度２９０℃、回転数５０ｒｐ
ｍ）でプラスチック磁性組成物３５０ｇを溶融混練し、
混練を開始してから１０分後と６０分後のトルク値で判
断した。
【００１８】プラスチック磁性組成物を熱板プレスする
ことにより、厚さ３ｍｍのプラスチック磁石を得た。プ
ラスチック磁石の曲げ強さについてはＡＳＴＭ Ｄ−７
９０に準じて測定を行った。また、プラスチック磁石の
ダインスタット衝撃強さについてはＢＳ １３３０に準
じて測定した。
【００１９】実施例１
ポリアミド１２樹脂（アミノ末端基濃度１．６×１０-5
グラム当量／ｇ）１００重量部とアミン系カップリング
剤処理した磁性金属粉末４００重量部、無水フタル酸
０．２重量部（８４グラム当量％）を溶融混練して、プ
ラスチック磁性組成物を得た。前述の評価の結果を表１
に示す。
【００２０】実施例２
ポリアミド１２樹脂１００重量部とアミン系カップリン
グ剤処理した磁性金属粉末４００重量部、無水マレイン
酸０．８重量部（３３８グラム当量％）を溶融混練し
て、プラスチック磁性組成物を得た。前述の評価の結果
を表１に示す。
【００２１】実施例３
ポリアミド１２樹脂１００重量部とアミン系カップリン
グ剤処理した磁性金属粉末４００重量部、無水フタル酸
２．０重量部（８４６グラム当量％）を溶融混練して、
プラスチック磁性組成物を得た。前述の評価の結果を表
１に示す。
【００２２】比較例１
ポリアミド１２樹脂１００重量部とアミン系カップリン
グ剤処理した磁性金属粉末４００重量部を溶融混練し
て、プラスチック磁性組成物を得た。前述の評価の結果
を表１に示す。
【００２３】比較例２
ポリアミド１２樹脂１００重量部とアミン系カップリン
グ剤処理していない磁性金属粉末４００重量部を溶融混
練して、プラスチック磁性組成物を得た。前述の評価の
結果を表１に示す。
【００２４】比較例３
ポリアミド１２樹脂１００重量部とアミン系カップリン
グ剤処理した磁性金属粉末４００重量部、無水マレイン
酸０．１重量部（４２グラム当量％）を溶融混練して、
プラスチック磁性組成物を得た。前述の評価の結果を表
１に示す。
【００２５】比較例４
ポリアミド１２樹脂１００重量部とアミン系カップリン
グ剤処理した磁性金属粉末４００重量部、無水フタル酸
３．５重量部（１４７８グラム当量％）を溶融混練し
て、プラスチック磁性組成物を得た。前述の評価の結果
を表１に示す。
【００２６】実施例４
ポリアミド１２樹脂１００重量部とアミン系カップリン
グ剤処理した磁性金属粉末７３０重量部、無水マレイン
酸０．３５重量部（２２３グラム当量％）を溶融混練し
て、プラスチック磁性組成物を得た。前述の評価の結果
を表１に示す。
【００２７】実施例５
ポリアミド１２樹脂１００重量部とアミン系カップリン
グ剤処理した磁性金属粉末７３０重量部、無水トリメリ
ト酸２．６重量部（８４６グラム当量％）を溶融混練し
て、プラスチック磁性組成物を得た。前述の評価の結果
を表１に示す。
【００２８】比較例５
ポリアミド１２樹脂１００重量部とアミン系カップリン
グ剤処理した磁性金属粉末７３０重量部を溶融混練し
て、プラスチック磁性組成物を得た。前述の評価の結果
を表１に示す。
【００２９】比較例６
ポリアミド１２樹脂１００重量部とアミン系カップリン
グ剤処理していない磁性金属粉末７３０重量部を溶融混
練して、プラスチック磁性組成物を得た。前述の評価の
結果を表１に示す。
【００３０】比較例７
ポリアミド１２樹脂１００重量部とアミン系カップリン
グ剤処理した磁性金属粉末７３０重量部、無水フタル酸
０．１重量部（４６グラム当量％）を溶融混練して、プ
ラスチック磁性組成物を得た。前述の評価の結果を表１
に示す。
【００３１】実施例８
ポリアミド１２樹脂１００重量部とアミン系カップリン
グ剤処理した磁性金属粉末７３０重量部、無水フタル酸
３．５重量部（１４７８グラム当量％）を溶融混練し
て、プラスチック磁性組成物を得た。前述の評価の結果
を表１に示す。
【００３２】
【表１】【００３３】
【発明の効果】本発明において、ポリアミド樹脂とアミ
ン系カップリング剤処理した磁性金属粉末を溶融混練す
る際にカルボン酸を添加することにより、機械的特性を
損なうことなく増粘を防止でき、磁気特性の優れたプラ
スチック磁石を得ることができる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic magnetic composition containing a polyamide resin and a magnetic metal powder as main components. In recent years, plastic magnetic compositions containing thermoplastic resins (eg, polyethylene resins, polyvinyl chloride resins, ethylene-vinyl acetate copolymers, polyamide resins, etc.) and magnetic metal powders as main components have been developed. Plastic magnets molded by injection molding or the like have been widely used for electric parts such as motors and switches instead of conventional sintered magnets. In particular, polyamide resins are often used because of their excellent heat resistance and mechanical properties. In this plastic magnet, the amount of magnetic metal powder and the magnetic properties are correlated. Therefore, in order to obtain high magnetic properties, it is necessary to use a plastic magnetic composition filled with magnetic metal powder at a high concentration. Was. Therefore, when trying to increase the blending amount of the magnetic metal powder, the surface of the magnetic metal powder is treated with an amine coupling agent so that a plastic magnet can be formed even with a small amount of the polyamide resin, and the magnetic metal powder is mixed with the polyamide resin. 2. Description of the Related Art A method of giving an affinity to give a plastic magnet mechanical strength has been widely used. However, when a polyamide resin is melt-kneaded with a magnetic metal powder treated with an amine-based coupling agent, the viscosity gradually increases and a large load is applied to the screw. Also, sprue generated in injection molding,
It is widely practiced to mix a ground pulverized runner at a certain ratio to obtain a molding material. However, when heat is applied many times as described above, the viscosity increases particularly remarkably. SUMMARY OF THE INVENTION The present invention relates to a plastic magnetic composition using a polyamide resin as a binder, wherein when a magnetic metal powder treated with a coupling agent is used, the viscosity increases by heating and kneading, The purpose is to prevent the problem that kneading and molding become difficult by a simple method. The inventors of the present invention have conducted intensive studies to solve the above-mentioned problems. As a result, the polyamide resin and the magnetic metal powder have a carboxylic acid having two or more carboxyl groups in the molecule. By blending the anhydride, melt kneading,
Thickening is suppressed during molding, and a plastic magnetic composition with excellent fluidity is obtained.The molded article obtained from the composition has high heat resistance, mechanical properties and magnetic properties. It has been found that a molded article having excellent appearance and excellent appearance can be obtained, and the present invention has been completed. The present invention relates to (A) 100 parts by weight of a polyamide resin, (B) 200 to 2000 parts by weight of a magnetic metal treated with an amine-based coupling agent, (C) phthalic anhydride,
Maleic anhydride, trimellitic anhydride and pyromellitic anhydride
A carboxylic anhydride having two or more carboxyl groups in a molecule selected from acids is converted to a polyamide resin amino terminal group 1
The present invention relates to a plastic magnetic composition characterized by melt-kneading 50 to 1000 gram equivalents per 00 gram equivalent. Examples of the polyamide in the present invention include polylactams such as polyamide 6, polyamide 11, and polyamide 12, polyamides obtained from dicarboxylic acid and diamine such as polyamide 66, polyamide 610, and polyamide 612; polyamide 6/66; 6
/ 610, polyamide 6/12, polyamide 6/61
2, polyamide 6/66/610, polyamide 6/66
/ 12, polyamide 6 / 6T (T: terephthalic acid component)
And the like, and a mixture thereof. In particular, it is preferable to use polyamide 6, polyamide 12, polyamide 6/12, and a mixture thereof. As the magnetic metal powder in the present invention, any type of magnetic metal powder may be used as long as it is a known magnetic metal powder that can be used for a plastic magnet. In particular, it is preferable to use a hard ferrite powder such as barium ferrite or strontium ferrite having a particle diameter of 0.5 to 10 μm, preferably 1.0 to 5.0 μm, or a mixture thereof. The amount of the magnetic metal powder used in the present invention is 200 to 20 parts by weight per 100 parts by weight of the polyamide resin.
00 parts by weight, preferably 400 to 1200 parts by weight. If the amount of the magnetic metal powder used is less than 200 parts by weight, the magnetic properties will be reduced due to a decrease in the mixing ratio of the magnetic metal powder, and if it exceeds 2,000 parts by weight, it is impossible to mold as a plastic magnet. The magnetic metal powder used in the present invention is treated with an amine-based coupling agent. The amine-based coupling agent may be N-β-aminoethyl-γ-.
Aminopropyl-trimethoxysilane, N-β-aminoethyl-γ-aminopropyl-methyldimethoxysilane, γ-aminopropyltriethoxysilane, and the like. The carboxylic anhydride having two or more carboxyl groups in the molecule in the present invention includes phthalic anhydride, maleic anhydride, trimellitic anhydride and pyromellitic anhydride. The amount of the carboxylic acid anhydride used in the present invention is 50 to 1000 gram equivalents, preferably 60 to 50 gram equivalents, per 100 gram equivalents of amino terminal groups of the polyamide resin.
0 gram equivalent. If the amount of the carboxylic acid is less than 50 gram equivalent, no effect is obtained in terms of preventing thickening. Also,
If it exceeds 1000 gram equivalent, the mechanical properties of the plastic magnet deteriorate. The polyamide resin composition of the present invention may further comprise other additives according to the required properties, for example, a heat-resistant agent, a weathering agent including an ultraviolet absorber, a flame retardant, an antistatic agent, a lubricant, a plasticizer, and a nucleating agent. , A foaming agent, a coloring agent, a stabilizer, a coupling agent, and the like. The present invention will be described in more detail with reference to the following Examples and Comparative Examples. The plastic magnetic composition was obtained by melt-kneading a polyamide resin, a magnetic metal powder treated with an amine coupling agent, and a carboxylic anhydride. Regarding the degree of thickening during melt-kneading of the plastic magnetic composition, a Labo Plastomill (mixer type D-200EX, temperature 290 ° C., rotation speed 50 rpm)
In step m), 350 g of the plastic magnetic composition is melt-kneaded,
Judgment was made based on the torque values 10 minutes and 60 minutes after the start of kneading. A plastic magnet having a thickness of 3 mm was obtained by pressing the plastic magnetic composition with a hot plate. ASTM D-7 about bending strength of plastic magnet
The measurement was carried out according to No. 90. The dynestat impact strength of the plastic magnet was measured according to BS 1330. Example 1 Polyamide 12 resin (amino terminal group concentration 1.6 × 10 −5)
(Gram equivalent / g) of 100 parts by weight, 400 parts by weight of magnetic metal powder treated with an amine coupling agent, and 0.2 part by weight of phthalic anhydride (84 gram equivalent%) were melt-kneaded to obtain a plastic magnetic composition. . Table 1 shows the results of the above evaluation.
Shown in Example 2 100 parts by weight of a polyamide 12 resin, 400 parts by weight of a magnetic metal powder treated with an amine coupling agent, and 0.8 part by weight of maleic anhydride (338 gram equivalent%) were melt-kneaded to obtain a plastic magnetic composition. I got something. Table 1 shows the results of the evaluation. Example 3 100 parts by weight of a polyamide 12 resin, 400 parts by weight of a magnetic metal powder treated with an amine coupling agent, and 2.0 parts by weight of phthalic anhydride (846 gram equivalent%) were melt-kneaded.
A plastic magnetic composition was obtained. Table 1 shows the results of the evaluation. Comparative Example 1 100 parts by weight of a polyamide 12 resin and 400 parts by weight of a magnetic metal powder treated with an amine coupling agent were melt-kneaded to obtain a plastic magnetic composition. Table 1 shows the results of the evaluation. Comparative Example 2 100 parts by weight of a polyamide 12 resin and 400 parts by weight of a magnetic metal powder not treated with an amine coupling agent were melt-kneaded to obtain a plastic magnetic composition. Table 1 shows the results of the evaluation. Comparative Example 3 100 parts by weight of a polyamide 12 resin, 400 parts by weight of a magnetic metal powder treated with an amine coupling agent, and 0.1 part by weight of maleic anhydride (42 gram equivalent%) were melt-kneaded.
A plastic magnetic composition was obtained. Table 1 shows the results of the evaluation. Comparative Example 4 100 parts by weight of a polyamide 12 resin, 400 parts by weight of a magnetic metal powder treated with an amine coupling agent, and 3.5 parts by weight of phthalic anhydride (1478 gram equivalent%) were melt-kneaded to obtain a plastic magnetic composition. I got something. Table 1 shows the results of the evaluation. Example 4 100 parts by weight of a polyamide 12 resin, 730 parts by weight of a magnetic metal powder treated with an amine coupling agent, and 0.35 parts by weight of maleic anhydride (223 gram equivalent%) were melt-kneaded to obtain a plastic magnetic composition. I got something. Table 1 shows the results of the evaluation. Example 5 100 parts by weight of a polyamide 12 resin, 730 parts by weight of a magnetic metal powder treated with an amine coupling agent, and 2.6 parts by weight of trimellitic anhydride (846 gram equivalent%) were melt-kneaded to obtain a plastic magnetic composition. I got something. Table 1 shows the results of the evaluation. Comparative Example 5 100 parts by weight of a polyamide 12 resin and 730 parts by weight of a magnetic metal powder treated with an amine coupling agent were melt-kneaded to obtain a plastic magnetic composition. Table 1 shows the results of the evaluation. Comparative Example 6 100 parts by weight of a polyamide 12 resin and 730 parts by weight of a magnetic metal powder not treated with an amine coupling agent were melt-kneaded to obtain a plastic magnetic composition. Table 1 shows the results of the evaluation. Comparative Example 7 A plastic magnetic composition was prepared by melt-kneading 100 parts by weight of a polyamide 12 resin, 730 parts by weight of a magnetic metal powder treated with an amine-based coupling agent, and 0.1 part by weight of phthalic anhydride (46 gram equivalent%). I got something. Table 1 shows the results of the above evaluation.
Shown in Example 8 100 parts by weight of a polyamide 12 resin, 730 parts by weight of a magnetic metal powder treated with an amine coupling agent, and 3.5 parts by weight of phthalic anhydride (1478 gram equivalent%) were melt-kneaded to obtain a plastic magnetic composition. I got something. Table 1 shows the results of the evaluation. [Table 1] According to the present invention, when a polyamide resin and a magnetic metal powder treated with an amine-based coupling agent are melt-kneaded, a carboxylic acid is added to prevent thickening without impairing mechanical properties. Thus, a plastic magnet having excellent magnetic properties can be obtained.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) H01F 1/00 - 1/117 B22F C22C ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 7 , DB name) H01F 1/00-1/117 B22F C22C
Claims (1)
（Ｂ）アミン系カップリング剤処理された磁性金属２０
０〜２０００重量部と、（Ｃ）無水フタル酸、無水マレ
イン酸、無水トリメリト酸及び無水ピロメリト酸から選
択される分子内に２個以上のカルボキシル基をもつカル
ボン酸無水物を、ポリアミド樹脂アミノ末端基１００グ
ラム当量当り５０〜１０００グラム当量とを溶融混練す
ることを特徴とするプラスチック磁性組成物。(57) [Claim 1] (A) 100 parts by weight of a polyamide resin,
(B) Magnetic metal 20 treated with an amine-based coupling agent
0 to 2000 parts by weight, (C) phthalic anhydride, maleic anhydride
Select from inic acid, trimellitic anhydride and pyromellitic anhydride
The carboxylic acid anhydride having two or more carboxyl groups in the molecule being-option, plastisol click magnetic, which comprises melt-kneading the polyamide resin amino end groups 100 grams per equivalent from 50 to 1,000 g eq Composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22832895A JP3389752B2 (en) | 1995-09-05 | 1995-09-05 | Plastic magnetic composition (A) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22832895A JP3389752B2 (en) | 1995-09-05 | 1995-09-05 | Plastic magnetic composition (A) |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0974009A JPH0974009A (en) | 1997-03-18 |
| JP3389752B2 true JP3389752B2 (en) | 2003-03-24 |
Family
ID=16874739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22832895A Expired - Fee Related JP3389752B2 (en) | 1995-09-05 | 1995-09-05 | Plastic magnetic composition (A) |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3389752B2 (en) |
-
1995
- 1995-09-05 JP JP22832895A patent/JP3389752B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0974009A (en) | 1997-03-18 |
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