JP2000003809A - Resin bonded metallic component and metal molding - Google Patents
Resin bonded metallic component and metal moldingInfo
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- JP2000003809A JP2000003809A JP10168707A JP16870798A JP2000003809A JP 2000003809 A JP2000003809 A JP 2000003809A JP 10168707 A JP10168707 A JP 10168707A JP 16870798 A JP16870798 A JP 16870798A JP 2000003809 A JP2000003809 A JP 2000003809A
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- resin
- bonded
- molecular weight
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- powder
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、特に金属成形体が
磁石である場合にその磁気特性に優れた金属成形体を与
える樹脂結合型金属組成物、及びこれを用いて得られた
金属成形体に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin-bonded metal composition which provides a metal molded body having excellent magnetic properties, particularly when the metal molded body is a magnet, and a metal molded body obtained by using the same. About.
【０００２】[0002]
【従来の技術】フェライト磁石、アルニコ磁石、希土類
磁石などの磁石は、主に金属粉末を焼き固める焼結法に
より作られるために、一般に脆く、薄肉のものや複雑な
形状のものが得難い。また焼結時の収縮が１５〜２０％
と大きいため寸法精度の高いものが得られず、寸法精度
を上げるには研磨等の焼結後の加工が必要である。2. Description of the Related Art Magnets such as ferrite magnets, alnico magnets, rare earth magnets, and the like are generally made by a sintering method of baking and solidifying metal powder. The shrinkage during sintering is 15-20%
Therefore, a product having high dimensional accuracy cannot be obtained, and a process after sintering such as polishing is required to increase the dimensional accuracy.
【０００３】樹脂結合型金属は、これらの欠点を解決す
ると共に新しい用途をも開拓するもので、ポリアミド樹
脂、ポリフェニレンサルファイド樹脂等の熱可塑性樹脂
をバインダーとし、これらに金属粉末を充填したもので
ある。The resin-bonded metal solves these drawbacks and opens up new applications. The resin-bonded metal is a thermoplastic resin such as a polyamide resin or a polyphenylene sulfide resin as a binder, which is filled with metal powder. .
【０００４】従来の熱可塑性樹脂をバインダーとして射
出成形により製造される樹脂結合型金属は、その成形
性、即ち混練時のトルクや組成物の溶融流動性の問題か
ら混合する金属粉末の質と量に限界があるため、成形後
の特性、特に成形が困難とされる複雑異形状製品の磁気
特性や透磁率を向上させた樹脂結合型金属組成物を得る
ことができなかった。[0004] The resin-bonded metal produced by injection molding using a conventional thermoplastic resin as a binder is characterized by the quality and quantity of the metal powder to be mixed due to its moldability, ie, the torque during kneading and the melt flowability of the composition. Therefore, it has not been possible to obtain a resin-bonded metal composition having improved properties after molding, particularly improved magnetic properties and magnetic permeability of a complicatedly shaped product that is difficult to mold.
【０００５】近年、小型モーター、音響機器、ＯＡ機器
等に用いられる樹脂結合型磁石は、機器の小型化の要請
から複雑形状化が進み、かつ磁気特性に優れたものが要
求される。上記従来の樹脂結合型磁石は成形性が不十分
で、しかも磁性粉含有量を増やせないためこれらの要求
を満たせず、樹脂結合型磁石組成物の早期改良が望まれ
ていた。In recent years, resin-coupled magnets used in small motors, audio equipment, OA equipment, and the like are required to be more complicated in shape due to the demand for downsizing of the equipment and to be excellent in magnetic properties. The above-mentioned conventional resin-bonded magnets have insufficient moldability and cannot increase the content of magnetic powder, and therefore cannot satisfy these requirements. Therefore, early improvement of the resin-bonded magnet composition has been desired.
【０００６】また、磁石のヨーク材は、従来磁石と接着
剤を介して一体化されていたが、組立コストの低減、磁
石の複雑形状化等の理由から、磁石との一体成形が可能
な樹脂結合型ヨーク材への要求が高まっている。Further, the yoke material of the magnet has conventionally been integrated with the magnet via an adhesive, but a resin which can be integrally formed with the magnet for reasons such as a reduction in assembly cost and a complicated shape of the magnet. There is an increasing demand for connection type yoke materials.
【０００７】[0007]
【発明が解決しようとする課題】しかし、従来の樹脂結
合型ヨーク材は成形性、即ち組成物の混練特性や溶融流
動性等が不十分で、かつヨーク材用金属粉末含有量を増
やせないため透磁率は不十分であり、樹脂結合型ヨーク
材の改良が望まれていた。However, the conventional resin-bonded yoke material has insufficient moldability, that is, the kneading characteristics and melt fluidity of the composition, and the content of the metal powder for the yoke material cannot be increased. The magnetic permeability is insufficient, and improvement of the resin-bonded yoke material has been desired.
【０００８】そこで本発明は、従来の熱可塑性樹脂結合
型金属成形体の欠点を解消し、例えば磁気特性の優れた
樹脂結合型磁石や透磁率の優れた樹脂結合型ヨーク材を
与える樹脂結合型金属組成物を提供することを目的とす
る。Accordingly, the present invention solves the drawbacks of the conventional thermoplastic resin-bonded metal molded product, and provides a resin-bonded magnet having excellent magnetic properties and a resin-bonded yoke material having excellent magnetic permeability. It is intended to provide a metal composition.
【０００９】[0009]
【課題を解決するための手段】本発明者らは、上記の目
的を達成するために、ポリアミド樹脂の末端アミノ基の
変性方法、分子量や添加剤等の種類を変えて種々の検討
を行った結果、末端アミノ基が変性され、かつ分子量分
布と分子量を一定範囲内に規定したポリアミド樹脂を用
いることで優れた磁気特性を有する樹脂結合型磁石や優
れた透磁率を有する樹脂結合型ヨーク材が得られること
を見いだし本発明を完成した。Means for Solving the Problems In order to achieve the above object, the present inventors have conducted various studies by changing the method of modifying the terminal amino group of the polyamide resin, changing the molecular weight and the type of additives, etc. As a result, a resin-bonded magnet having excellent magnetic properties and a resin-bonded yoke material having excellent magnetic permeability are obtained by using a polyamide resin in which a terminal amino group is modified and a molecular weight distribution and a molecular weight are defined within a certain range. The inventors have found that the present invention has been completed and completed the present invention.
【００１０】即ち、本発明の樹脂結合型金属組成物は、
金属粉末とポリアミド樹脂とからなる樹脂結合型金属組
成物であって、該ポリアミド樹脂は、末端アミノ基濃度
が０〜２０ｍｍｏｌ／ｋｇ、分子量分布が２．８〜１
０、数平均分子量が５０００〜１５００である樹脂に、
末端アミノ基濃度が０〜２０ｍｍｏｌ／ｋｇ、数平均分
子量１５０００〜３００００である樹脂を５〜５０ｗｔ
％混合することを特徴とする。That is, the resin-bonded metal composition of the present invention comprises:
A resin-bound metal composition comprising a metal powder and a polyamide resin, wherein the polyamide resin has a terminal amino group concentration of 0 to 20 mmol / kg and a molecular weight distribution of 2.8 to 1
0, a resin having a number average molecular weight of 5,000 to 1,500,
A resin having a terminal amino group concentration of 0 to 20 mmol / kg and a number average molecular weight of 15,000 to 30,000 is 5 to 50 wt.
%.
【００１１】また、本発明の金属成形体は、本発明の樹
脂結合型金属組成物を射出成形または押出成形して得た
ことを特徴とする。Further, the metal molded article of the present invention is characterized by being obtained by injection molding or extrusion molding of the resin-bonded metal composition of the present invention.
【００１２】ここで「分子量分布」とは、「重量平均分
子量」を「数平均分子量」で除した値である。Here, "molecular weight distribution" is a value obtained by dividing "weight average molecular weight" by "number average molecular weight".
【００１３】また、「流れ値Ｑ」とは、ＪＩＳ Ｋ−７
２１０の「流れ試験方法（参考試験）」による。The "flow value Q" is defined in JIS K-7.
In accordance with 210 "Flow test method (reference test)".
【００１４】[0014]
【発明の実施の形態】本発明で用いる金属粉末として
は、少なくとも構成元素中に非酸化状態の鉄元素を含む
金属粉末とすることができ、例えば一般に市販されてい
る希土類−遷移金属系磁性粉末や、純鉄系、鉄−珪素系
等のヨーク材鉄系粉末など、通常樹脂結合型金属成形体
に用いられているものが使用できる。BEST MODE FOR CARRYING OUT THE INVENTION The metal powder used in the present invention may be a metal powder containing at least a non-oxidized iron element in the constituent elements. For example, a commercially available rare earth-transition metal magnetic powder Or, a material usually used for a resin-bonded metal molded body, such as a pure iron-based or iron-silicon-based yoke material iron-based powder, can be used.
【００１５】より具体的には、希土類−遷移金属系磁性
粉末としては、希土類−鉄−コバルト−硼素系（例え
ば、Ｎｄ−Ｆｅ−Ｃｏ−Ｂ系）、希土類−鉄−硼素系
（例えば、Ｎｄ−Ｆｅ−Ｂ系）、希土類−鉄−窒素系
（例えば、Ｓｍ−Ｆｅ−Ｎ系）等の磁性粉が挙げられ
る。ヨーク材鉄系粉末としては、純鉄、軟鋼、鉄−珪素
系、ニッケル−鉄系、鉄−コバルト系、鉄−珪素−アル
ミニウム系、鉄系またはコバルト系の非晶質軟磁性粉等
の金属粉が挙げられる。More specifically, rare earth-transition metal magnetic powders include rare earth-iron-cobalt-boron (for example, Nd-Fe-Co-B) and rare earth-iron-boron (for example, Nd). -Fe-B-based) and rare earth-iron-nitrogen-based (for example, Sm-Fe-N-based) magnetic powders. Examples of the yoke material iron-based powder include metals such as pure iron, mild steel, iron-silicon, nickel-iron, iron-cobalt, iron-silicon-aluminum, iron-based or cobalt-based amorphous soft magnetic powder. Powder.
【００１６】上記樹脂結合型磁石組成物において、磁性
粉として上で例示したＮｄ−Ｆｅ−Ｂ系の液体急冷法に
よる合金粉末やＳｍ−Ｆｅ−Ｎ系の合金粉末を用いる
と、例えば９０重量％以上の高充填化組成物でも容易に
成形が可能であり、結果的に優れた磁気特性を有する樹
脂結合型磁石が得られる。特に、非酸化状態の鉄元素を
含む磁性粉を用いる場合は、本発明の効果が大きく、成
形性の著しい向上をはじめ高磁気特性化への割合が著し
い。In the above-mentioned resin-bonded magnet composition, when the Nd-Fe-B-based alloy powder or the Sm-Fe-N-based alloy powder exemplified above is used as the magnetic powder, for example, 90% by weight is used. Even the highly filled composition described above can be easily molded, and as a result, a resin-bonded magnet having excellent magnetic properties can be obtained. In particular, when a magnetic powder containing an iron element in a non-oxidized state is used, the effect of the present invention is great, and the ratio to high magnetic characteristics including remarkable improvement in moldability is remarkable.
【００１７】液体急冷法によって得られたＮｄ−Ｆｅ−
Ｂ系の磁性粉は、鱗片状の特異な形状を有しているた
め、好ましくはジェットミルやボールミル等で粉砕した
方が良い。これら磁性粉末の好ましい粒径は、平均２０
０μｍ以下であり、特に好ましくは平均１００μｍ以下
である。Nd-Fe- obtained by the liquid quenching method
Since the B-based magnetic powder has a unique scale-like shape, it is preferable to grind it with a jet mill, a ball mill, or the like. The preferred particle size of these magnetic powders is 20 on average.
It is 0 μm or less, particularly preferably 100 μm or less on average.
【００１８】これらの磁性粉は、勿論そのままの状態で
使用することができるが、混練中、成形中の酸化劣化を
極力防ぐためにも種々の表面処理剤で表面被覆を行うこ
とが望ましい。These magnetic powders can of course be used as they are, but it is desirable to coat the surfaces with various surface treating agents in order to minimize oxidation deterioration during kneading and molding.
【００１９】表面処理可能な材料としては、シラン系カ
ップリング剤としてビニルトリエトキシシラン、γ−ア
ミノプロピルトリエトキシシラン、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−メルカプトプロピルトリメトキシシ
ラン等又、チタン系カップリング剤としてイソプロピル
トリイソステアロイルチタネート、イソプロピルトリス
（ジオクチルパイロホスフェート）チタネート、イソプ
ロピルトリ（Ｎ−アミノエチル−アミノエチル）チタネ
ート、テトラオクチルビス（ジトリデシルホスファイ
ト）チタネート、イソプロピルトリオクタノイルチタネ
ート、イソプロピルジメタクリルイソステアロイルチタ
ネート、イソプロピルトリデシルベンゼンスルフォニル
チタネート等、又、アルミニウム系カップリング剤とし
てアセトアルコキシアルミニウムジイソプロピレート等
又、燐酸系表面処理剤、クロム酸系表面処理剤、燐酸亜
鉛系表面処理剤、燐酸マンガン系表面処理剤、燐酸鉄系
表面処理剤、燐酸カルシウム表面処理剤等の燐酸系、燐
酸塩系表面処理剤等が挙げられる。Materials that can be surface-treated include vinyltriethoxysilane, γ-aminopropyltriethoxysilane, N- (β-aminoethyl) -γ-aminopropyltrimethoxysilane, and N-silane coupling agents.
(Β-aminoethyl) -γ-aminopropylmethyldimethoxysilane, γ-mercaptopropyltrimethoxysilane, etc. Also, as a titanium-based coupling agent, isopropyl triisostearoyl titanate, isopropyl tris (dioctyl pyrophosphate) titanate, isopropyl tri (N -Aminoethyl-aminoethyl) titanate, tetraoctylbis (ditridecylphosphite) titanate, isopropyltrioctanoyl titanate, isopropyldimethacrylisostearoyl titanate, isopropyltridecylbenzenesulfonyl titanate, etc .; Alkoxy aluminum diisopropylate, phosphoric acid surface treatment agent, chromic acid surface treatment agent, zinc phosphate surface treatment agent, phosphoric acid Ngan-based surface treatment agent, iron phosphate-based surface treating agent, phosphoric acid such as calcium phosphate surface treatment agents, and the like phosphate-based surface treatment agent.
【００２０】特に、これらの燐酸系表面処理剤、燐酸塩
系表面処理剤で事前に磁粉の表面に処理を施し、後工程
で組成物とすることで磁気特性の低下を最小限にくい止
めることが確認できている。又、オルガノシロキサン系
表面皮膜、オルガノシロキサン系とオルガノシリカゾル
との混合表面皮膜、オルガノシロキサン系とアクリルモ
ノマーの混合表面皮膜、ポリオルガノシルセスキオキサ
ン（ラダー型オルガノシロキサン系ポリマー）系表面皮
膜、ヘキサメチルジシラザン系による表面皮膜等やポリ
シラザン（ペルヒドロポリシラザン）、酸化珪素等の単
独または混合無機被覆膜を形成させた磁性粉を使用する
ことで磁気特性の低下を最小限にくい止めることが確認
できている。In particular, by treating the surface of the magnetic powder in advance with these phosphoric acid-based surface treatment agents and phosphate-based surface treatment agents to form a composition in a subsequent step, it is possible to minimize the decrease in magnetic properties. I can confirm. Also, an organosiloxane-based surface film, a mixed surface film of an organosiloxane-based and organosilica sol, a mixed surface film of an organosiloxane-based and acrylic monomer, a polyorganosilsesquioxane (ladder-type organosiloxane-based polymer) -based surface film, It has been confirmed that the use of magnetic powder formed with a single or mixed inorganic coating film such as a methyldisilazane-based surface film, polysilazane (perhydropolysilazane), silicon oxide, etc. can minimize deterioration of magnetic properties. is made of.
【００２１】次に、本発明の樹脂結合型磁石用組成物
は、末端アミノ基がカルボキシル基含有炭化水素で変性
されたポリアミド樹脂を用いることを特徴とする。変性
前のポリアミド樹脂は、例えば、６ナイロン、６、６ナ
イロン、１１ナイロン、１２ナイロン、６、１２ナイロ
ン、芳香族系ナイロン等が挙げられ、これらの単重合体
や他種モノマーとのランダム共重合体、ブロック共重合
体、グラフト共重合体、他の物質での末端基変性品など
が挙げられる。また、これらの熱可塑性樹脂の２種類以
上のブレンド等における系も当然含まれる。Next, the composition for a resin-bonded magnet of the present invention is characterized in that a polyamide resin having a terminal amino group modified with a carboxyl group-containing hydrocarbon is used. Examples of the polyamide resin before modification include 6 nylon, 6, 6 nylon, 11 nylon, 12 nylon, 6, 12 nylon, and aromatic nylon, and random copolymers of these homopolymers and other monomers. Examples thereof include polymers, block copolymers, graft copolymers, and end-group modified products with other substances. Further, naturally, a system in a blend of two or more kinds of these thermoplastic resins is also included.
【００２２】これらの中では成形性、吸水率の面で１１
ナイロン、１２ナイロンの使用が好ましい。従来のポリ
アミド樹脂では、混合する磁性粉中に含有する非酸化状
態の鉄元素との特殊反応性によって加熱混練中や射出成
形時の組成物溶融粘度が著しく変化することによって成
形性を損なう結果を招いていたが、末端アミド基を変性
することでこれらの大幅な改善が可能となった。Among these, in terms of moldability and water absorption, 11
Use of nylon or nylon 12 is preferred. In conventional polyamide resins, the special reactivity with the non-oxidized iron element contained in the magnetic powder to be mixed significantly alters the melt viscosity of the composition during heating and kneading and during injection molding, resulting in impaired moldability. However, by modifying the terminal amide group, these significant improvements became possible.
【００２３】この変成後の末端アミド基の残存量は２０
ｍｍｏｌ／ｋｇ以下が好ましく、さらに好ましくは、１
５ｍｍｏｌ／ｋｇ以下で、無に近い程良好な結果を得
る。この２０ｍｍｏｌ／ｋｇよりも残存末端アミド基量
が増すと、磁性粉、特に非酸化状態の鉄元素を含む磁性
粉との反応が著しくなり、著しい溶融粘度の上昇、流動
性の低下を招き本発明の効果を得ることができない。The residual amount of the terminal amide group after the modification is 20
mmol / kg or less, more preferably 1
At 5 mmol / kg or less, the better the result is, the closer to nothing. When the amount of the residual terminal amide group is more than 20 mmol / kg, the reaction with the magnetic powder, especially the magnetic powder containing the non-oxidized iron element becomes remarkable, resulting in a remarkable increase in melt viscosity and a decrease in fluidity. Effect cannot be obtained.
【００２４】また、変性に用いるカルボキシル基含有炭
化水素としては、酢酸、プロピオン酸、酪酸、吉相酸、
ラウリン酸、パルミチン酸、ステアリン酸、ベヘン酸等
のモノカルボキシル飽和脂肪酸系、シュウ酸、マロン
酸、コハク酸、グルタル酸、アジピン酸等のジカルボキ
シル飽和脂肪酸系、アクリル酸、リノール酸、オレイン
酸等のモノカルボキシル不飽和脂肪酸系、マレイン酸、
フマル酸等のジカルボキシル不飽和脂肪酸系、安息香酸
等の芳香族系モノカルボキシル炭化水素、フタル酸、ナ
フタレンジカルボン酸等の芳香族系ジカルボキシル炭化
水素等が挙げられる。The carboxyl group-containing hydrocarbon used for the modification includes acetic acid, propionic acid, butyric acid, succinic acid,
Monocarboxylic saturated fatty acids such as lauric acid, palmitic acid, stearic acid and behenic acid, dicarboxylic saturated fatty acids such as oxalic acid, malonic acid, succinic acid, glutaric acid and adipic acid, acrylic acid, linoleic acid, oleic acid, etc. Monocarboxylic unsaturated fatty acids, maleic acid,
Examples thereof include dicarboxylic unsaturated fatty acids such as fumaric acid, aromatic monocarboxylic hydrocarbons such as benzoic acid, and aromatic dicarboxylic hydrocarbons such as phthalic acid and naphthalenedicarboxylic acid.
【００２５】その中でも、モノカルボキシル基含有炭化
水素が好ましく、さらにはこの炭化水素が脂肪酸である
ことが好ましい。また、この炭化水素１分子中の構成炭
素数は１０以上３０以下であることが望ましい。炭素数
が１０以下であると成形性の改善効果が見られず、３０
以上では溶融粘度の増大をまねき本発明の効果を得るこ
とができない。これらによって変性されたポリアミド樹
脂の平均分子量は５０００以上１５０００以下を主たる
樹脂とすることが好ましい。５０００以下では著しい成
形体強度の低下を招いて実用性に欠け、１５０００以上
では溶融粘度の上昇による成形性の悪化を招き本発明の
効果を得ることができない。最も好ましい範囲は、８０
００〜１２０００である。Of these, a monocarboxyl group-containing hydrocarbon is preferred, and more preferably, the hydrocarbon is a fatty acid. Further, it is desirable that the number of carbon atoms in one molecule of the hydrocarbon is 10 or more and 30 or less. When the number of carbon atoms is 10 or less, no improvement effect of the moldability is observed, and 30
Above, the melt viscosity is increased, and the effect of the present invention cannot be obtained. The average molecular weight of the polyamide resin modified by these is preferably 5000 or more and 15000 or less as a main resin. If it is 5,000 or less, the strength of the molded body is remarkably reduced, and the practicality is lacking. If it is 15,000 or more, the moldability is deteriorated due to an increase in melt viscosity, and the effect of the present invention cannot be obtained. The most preferred range is 80
00 to 12000.
【００２６】本発明に用いるポリアミド樹脂は、射出成
形、押出し成形時の高温時や高剪断域での著しい溶融粘
度低下を防止するために、前記主たる樹脂に数平均分子
量１５０００〜３００００である従たる樹脂を５〜５０
ｗｔ％混合することが特徴である。この従たる樹脂の分
子量が１５０００以下であると成形時の高温時や高剪断
域での著しい溶融粘度低下を防止できない。また、３０
０００以上となると組成物の著しい溶融流動性の低下を
招き本発明の効果を得られない。これらの従たる樹脂の
添加量は、分子量が大きくなるほど少なくて済むが、一
般的には５〜５０ｗｔ％が望ましい。５ｗｔ％以下では
成形時の高温時や高剪断域での著しい溶融粘度低下を防
止できず、５０ｗｔ％以上で組成物の著しい溶融流動性
の低下を招き本発明の効果を得られない。また、これら
のポリアミド樹脂は、分子量分布（重量平均分子量／数
平均分子量）が大きい点、即ち２．８以上１０以下に設
定される。分子量分布は、好ましくは２．８以上６程
度、更に好ましくは２．８以上４．２程度である。この
分子量分布が２．８以下の場合は、成形時の金型内温度
程度である約１００℃前後の機械強度が低く実用に耐え
ることができない。また、１０以上であると成形温度で
の未溶融物が多くなり流動性の低下を招き本発明の効果
を得ることができない。The polyamide resin used in the present invention has a number average molecular weight of 15,000 to 30,000 in the main resin in order to prevent a remarkable decrease in melt viscosity at a high temperature during injection molding or extrusion molding or in a high shear region. 5-50 resin
It is characterized by mixing by wt%. If the molecular weight of such a resin is 15,000 or less, it is not possible to prevent a remarkable decrease in melt viscosity at a high temperature during molding or in a high shear region. Also, 30
If it exceeds 000, the melt fluidity of the composition will be remarkably reduced, and the effect of the present invention cannot be obtained. The amount of addition of these secondary resins may be smaller as the molecular weight increases, but generally it is desirable to add 5 to 50 wt%. If it is less than 5 wt%, it is not possible to prevent a significant decrease in melt viscosity at a high temperature during molding or in a high shear region, and if it is more than 50 wt%, the melt flowability of the composition is remarkably reduced, and the effect of the present invention cannot be obtained. In addition, these polyamide resins are set to have a large molecular weight distribution (weight average molecular weight / number average molecular weight), that is, 2.8 or more and 10 or less. The molecular weight distribution is preferably from about 2.8 to about 6, more preferably from about 2.8 to about 4.2. When the molecular weight distribution is 2.8 or less, the mechanical strength at about 100 ° C., which is about the temperature in the mold at the time of molding, is low and cannot be put to practical use. On the other hand, if it is 10 or more, the amount of unmelted material at the molding temperature increases, causing a decrease in fluidity, and the effect of the present invention cannot be obtained.
【００２７】ポリアミド樹脂の前記分子量や分子量分布
は、慣用の方法、例えば、ゲルパーミエーションクロマ
トグラフィー（ＧＰＣ）等によりもとめることができ
る。このポリアミド樹脂は、異なる平均分子量や分子量
分布を有する２種以上の混合体でも最終使用時の末端ア
ミノ基、平均分子量、分子量分布等が該発明の範囲内に
属していれば本発明の効果を十分得ることができるた
め、２種以上のポリアミド樹脂を混合調整し用いても良
い。The molecular weight and the molecular weight distribution of the polyamide resin can be determined by a conventional method, for example, gel permeation chromatography (GPC). This polyamide resin can exert the effects of the present invention even if a mixture of two or more kinds having different average molecular weights and molecular weight distributions has terminal amino groups, average molecular weights, molecular weight distributions, and the like at the time of final use belonging to the range of the present invention. Since a sufficient amount can be obtained, two or more kinds of polyamide resins may be mixed and used.
【００２８】これらの変性されたポリアミド樹脂の形状
は、パウダー、ビーズ、ペレット等特に限定されない
が、磁性粉との均一混合性から考えるとパウダーが望ま
しい。添加する量は、該磁性粉１００重量部に対して５
重量部以上５０重量部未満の割合が良く、好ましくは８
重量部以上２０重量部以下、さらには８重量部以上１５
重量部以下がより好ましい。該ポリアミド樹脂の添加量
が該磁性粉１００重量部に対して５重量部以下の場合
は、成形性が著しく低下し、所望の樹脂結合型磁石成形
することができない。また、添加量が５０重量部以上の
場合所望の磁気特性が得られない。The shape of these modified polyamide resins is not particularly limited, such as powder, beads, pellets, etc., but powder is desirable in view of uniform mixing with magnetic powder. The amount to be added is 5 to 100 parts by weight of the magnetic powder.
The proportion is preferably not less than 50 parts by weight, more preferably 8 parts by weight.
Not less than 20 parts by weight, more preferably not less than 8 parts by weight and not more than 15 parts by weight
It is more preferably at most part by weight. When the addition amount of the polyamide resin is 5 parts by weight or less based on 100 parts by weight of the magnetic powder, the moldability is remarkably reduced, and a desired resin-bonded magnet cannot be formed. If the amount is more than 50 parts by weight, desired magnetic properties cannot be obtained.
【００２９】本発明における組成物は、これらの必須成
分の他にもポリアミド樹脂以外の樹脂、プラスチック成
形用滑剤や種々の安定剤等を添加することができる。In the composition of the present invention, in addition to these essential components, resins other than polyamide resins, lubricants for plastic molding, various stabilizers, and the like can be added.
【００３０】本発明の組成物に添加可能なポリアミド樹
脂以外の樹脂としては、ポリエチレン樹脂、ポリプロピ
レン樹脂、ポリブテン樹脂、ポリメチルペンテン樹脂、
エチレン−酢酸ビニル共重合樹脂、エチレン−エタクリ
レート共重合樹脂、エチレン−メタクリレート共重合樹
脂、塩素化ポリエチレン樹脂、部分酸化ポリエチレン樹
脂等のポリオレフィン系及びその共重合樹脂をはじめ、
ポリエチレンテレフタレート樹脂、ポリブチレンテレフ
タレート樹脂、ポリアセタール樹脂、ポリカーボネート
樹脂、ポリフェニレンオキサイド樹脂、ポリアリレート
樹脂、ポリスルフォン樹脂、ポリアミドイミド樹脂、ポ
リフェニレンサルファイド樹脂、酢酸セルロース、酪酸
セルロース、ポリスチレン樹脂、ポリブタジエン樹脂、
ポリアクリロニトリル樹脂、スチレン−ブタジエン共重
合樹脂、スチレン−アクリロニトリル共重合樹脂、アク
リロニトリル−ブタジエン−スチレン共重合樹脂、アク
リレート−スチレン−アクリロニトリル樹脂、塩素化ポ
リエチレン−アクリロニトリル−スチレン共重合樹脂、
ポリ塩化ビニル樹脂、ポリ塩化ビニリデン樹脂、ポリ酢
酸ビニル樹脂、ポリメチルメタクリレート樹脂、ポリブ
チルメタクリレート樹脂、ポリテトラフロロエチレン樹
脂、エチレン−ポリテトラフロロエチレン共重合樹脂等
が挙げられる。The resins other than the polyamide resin that can be added to the composition of the present invention include polyethylene resins, polypropylene resins, polybutene resins, polymethylpentene resins,
Including polyolefins such as ethylene-vinyl acetate copolymer resin, ethylene-ethacrylate copolymer resin, ethylene-methacrylate copolymer resin, chlorinated polyethylene resin, and partially oxidized polyethylene resin and their copolymer resins,
Polyethylene terephthalate resin, polybutylene terephthalate resin, polyacetal resin, polycarbonate resin, polyphenylene oxide resin, polyarylate resin, polysulfone resin, polyamideimide resin, polyphenylene sulfide resin, cellulose acetate, cellulose butyrate, polystyrene resin, polybutadiene resin,
Polyacrylonitrile resin, styrene-butadiene copolymer resin, styrene-acrylonitrile copolymer resin, acrylonitrile-butadiene-styrene copolymer resin, acrylate-styrene-acrylonitrile resin, chlorinated polyethylene-acrylonitrile-styrene copolymer resin,
Examples include polyvinyl chloride resin, polyvinylidene chloride resin, polyvinyl acetate resin, polymethyl methacrylate resin, polybutyl methacrylate resin, polytetrafluoroethylene resin, and ethylene-polytetrafluoroethylene copolymer resin.
【００３１】滑剤としては、例えばパラフィンワック
ス、流動パラフィン、ポリエチレンワックス、ポリプロ
ピレンワックス、エステルワックス、カルナウバ、マイ
クロワックス等のワックス類、ステアリン酸、１，２−
オキシステアリン酸、ラウリン酸、パルミチン酸、オレ
イン酸等の脂肪酸類、ステアリン酸カルシウム、ステア
リン酸バリウム、ステアリン酸マグネシウム、ステアリ
ン酸リチウム、ステアリン酸亜鉛、ステアリン酸アルミ
ニウム、ラウリン酸カルシウム、リノール酸亜鉛、リシ
ノール酸カルシウム、２−エチルヘキソイン酸亜鉛等の
脂肪酸塩（金属石鹸類）ステアリン酸アミド、オレイン
酸アミド、エルカ酸アミド、ベヘン酸アミド、パルミチ
ン酸アミド、ラウリン酸アミド、ヒドロキシステアリン
酸アミド、メチレンビスステアリン酸アミド、エチレン
ビスステアリン酸アミド、エチレンビスラウリン酸アミ
ド、ジステアリルアジピン酸アミド、エチレンビスオレ
イン酸アミド、ジオレイルアジピン酸アミド、Ｎ−ステ
アリルステアリン酸アミド等脂肪酸アミド類、ステアリ
ン酸ブチル等の脂肪酸エステル、エチレングリコール、
ステアリルアルコール等のアルコール類、グリセリンモ
ノラウレート、グリセリンモノパルミテート、グリセリ
ンモノステアレート、グリセリンモノオレート、グリセ
リンモノ・ジステアレート、グリセリンモノベヘネー
ト、グリセリンジアセトモノラウレート、クエン酸不飽
和脂肪酸モノグリセライド、ジグリセリンラウレート、
ジグリセリンステアレート、テトラグリセリンステアレ
ート、デカグリセリンラウレート等のグリセリン系化合
物、またはグリセリン系脂肪酸エステル化合物、ポリエ
チレングリコール、ポリプロピレングリコール、ポリテ
トラメチレングリコール、及びこれら変性物からなるポ
リエーテル類、ジメチルポリシロキサン、シリコングリ
ース等のポリシロキサン類、弗素系オイル、弗素系グリ
ース、含弗素樹脂粉末といった弗素化合物、窒化珪素、
炭化珪素、酸化マグネシウム、アルミナ、二酸化珪素、
二硫化モリブデン等の無機化合物粉体が挙げられる。Examples of the lubricant include waxes such as paraffin wax, liquid paraffin, polyethylene wax, polypropylene wax, ester wax, carnauba, microwax, stearic acid, 1,2-
Fatty acids such as oxystearic acid, lauric acid, palmitic acid and oleic acid, calcium stearate, barium stearate, magnesium stearate, lithium stearate, zinc stearate, aluminum stearate, calcium laurate, zinc linoleate, calcium ricinoleate , Fatty acid salts (metal soaps) such as zinc 2-ethylhexoate, stearic acid amide, oleic acid amide, erucic acid amide, behenic acid amide, palmitic acid amide, lauric acid amide, hydroxystearic acid amide, methylenebisstearic acid amide, Ethylenebisstearic acid amide, ethylenebislauric amide, distearyladipamide, ethylenebisoleic amide, dioleyladipamide, N-stearylstearin Amides such as fatty acid amides, fatty acid esters, ethylene glycol and butyl stearate,
Alcohols such as stearyl alcohol, glycerin monolaurate, glycerin monopalmitate, glycerin monostearate, glycerin monooleate, glycerin mono distearate, glycerin monobehenate, glycerin diacet monolaurate, citrate unsaturated fatty acid monoglyceride, Glycerin laurate,
Glycerin-based compounds such as diglycerin stearate, tetraglycerin stearate, decaglycerin laurate, or glycerin-based fatty acid ester compounds, polyethylene glycol, polypropylene glycol, polytetramethylene glycol, and polyethers and dimethyl poly composed of modified products thereof Polysiloxanes such as siloxane and silicon grease, fluorine compounds such as fluorine-based oil, fluorine-based grease and fluorine-containing resin powder, silicon nitride,
Silicon carbide, magnesium oxide, alumina, silicon dioxide,
Examples include inorganic compound powders such as molybdenum disulfide.
【００３２】また、安定剤としては、ビス（２、２、
６、６、−テトラメチル−４−ピペリジル）セバケー
ト、ビス（１、２、２、６、６、−ペンタメチル−４−
ピペリジル）セバケート、１−［２−｛３−（３，５−
ジ−第三ブチル−４−ヒドロキシフェニル）プロピオニ
ルオキシ｝エチル］−４−｛３−（３、５−ジ−第三ブ
チル−４−ヒドロキシフェニル）プロピオニルオキシ｝
−２、２、６、６−テトラメチルピペリジン、８−ベン
ジル−７、７、９、９−テトラメチル−３−オクチル−
１、２、３−トリアザスピロ［４、５］ウンデカン−
２、４−ジオン、４−ベンゾイルオキシ−２、２、６、
６−テトラメチルピペリジン、こはく酸ジメチル−１−
（２−ヒドロキシエチル）−４−ヒドロキシ−２、２、
６、６−テトラメチルピペリジン重縮合物、ポリ［［６
−（１、１、３、３−テトラメチルブチル）イミノ−
１、３、５−トリアジン−２、４−ジイル］［（２、
２、６、６−テトラメチル−４−ピペリジル）イミノ］
ヘキサメチレン［［２、２、６、６−テトラメチル−４
−ピペリジル）イミノ］］、２−（３、５−ジ・第三ブ
チル−４−ヒドロキシベンジル）−２−ｎ−ブチルマロ
ン酸ビス（１、２、２、６、６−ペンタメチル−４−ピ
ペリジル）等のヒンダード・アミン系安定剤のほか、フ
ェノール系、ホスファイト系、チオエーテル系等の抗酸
化剤等が挙げられる。As the stabilizer, bis (2, 2,
6,6, -tetramethyl-4-piperidyl) sebacate, bis (1,2,2,6,6, -pentamethyl-4-
Piperidyl) sebacate, 1- [2- {3- (3,5-
Di-tert-butyl-4-hydroxyphenyl) propionyloxy {ethyl] -4- {3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionyloxy}
-2,2,6,6-tetramethylpiperidine, 8-benzyl-7,7,9,9-tetramethyl-3-octyl-
1,2,3-triazaspiro [4,5] undecane-
2,4-dione, 4-benzoyloxy-2,2,6,
6-tetramethylpiperidine, dimethyl succinate-1-
(2-hydroxyethyl) -4-hydroxy-2,2,
6,6-tetramethylpiperidine polycondensate, poly [[6
-(1,1,3,3-tetramethylbutyl) imino-
1,3,5-triazine-2,4-diyl] [(2,
2,6,6-tetramethyl-4-piperidyl) imino]
Hexamethylene [[2,2,6,6-tetramethyl-4
-Piperidyl) imino]], bis (1,2,2,6,6-pentamethyl-4-piperidyl) 2- (3,5-di-tert-butyl-4-hydroxybenzyl) -2-n-butylmalonate ), Antioxidants such as phenolic, phosphite, thioether and the like.
【００３３】上記の他、顔料やプラスチック用各種改質
剤、相溶化剤等を適宜必要に応じて添加しても差し支え
ないが、最終混練後の組成物が、ＪＩＳ Ｋ７２１０
「流れ試験方法（参考試験）」に準じてダイＢを使用し
た時の、荷重３０ｋｇｆ、測定温度２５０℃における溶
融時の組成物流れ値Ｑが５０×１０-3ｍｌ／秒以上１０
０００×１０-3ｍｌ／秒以下となることが好ましい。溶
融時の組成物流れ値Ｑが５０×１０-3ｍｌ／秒以下であ
ると成形時の成形安定性が得られないばかりか本発明の
効果を得ることもできない。また、１００００×１０-3
ｍｌ／秒以上の場合は、成形時のバリの発生、成形体中
の添加剤等の分離等が生じ最終成形体の著しい強度の低
下を招き実用に耐えうることができなくなる。In addition to the above, pigments, various modifiers for plastics, compatibilizers and the like may be added as needed, but the composition after final kneading is JIS K7210.
When the die B is used according to the “flow test method (reference test)”, the composition flow value Q at the time of melting at a load of 30 kgf and a measurement temperature of 250 ° C. is 50 × 10 −3 ml / sec or more.
It is preferably at most 000 × 10 −3 ml / sec. If the composition flow value Q at the time of melting is 50 × 10 −3 ml / sec or less, not only the molding stability at the time of molding cannot be obtained but also the effect of the present invention cannot be obtained. Also, 10,000 × 10 -3
In the case of more than ml / sec, burrs are generated during molding, additives and the like in the molded body are separated, and the final molded body is remarkably reduced in strength and cannot be put to practical use.
【００３４】本発明において、これら各成分の混合方法
は特に限定されず、例えばリボンブレンダー、タンブラ
ー、ナウターミキサー、ヘンシェルミキサー、スーパー
ミキサー等の混合機あるいは、バンバリーミキサー、ニ
ーダー、ロール、ニーダールーダー、単軸押出機、二軸
押出機等の混練機を使用して実施することができる。In the present invention, the method of mixing these components is not particularly limited. For example, a mixer such as a ribbon blender, a tumbler, a Nauter mixer, a Henschel mixer, a super mixer, or a Banbury mixer, a kneader, a roll, a kneader ruder, It can be carried out using a kneader such as a single screw extruder or a twin screw extruder.
【００３５】本発明の組成物は、各成分を混合し、パウ
ダー、ビーズ、ペレットあるいはこれらの混合物の形で
得られるが、取扱い易い点で、ペレットが望ましい。得
られた組成物は、各種の熱可塑性樹脂成形機、好ましく
は射出成形機、押出成形機により成形される。The composition of the present invention can be obtained in the form of powder, beads, pellets or a mixture thereof by mixing the respective components, but pellets are preferred in terms of easy handling. The obtained composition is molded by various thermoplastic resin molding machines, preferably an injection molding machine and an extrusion molding machine.
【００３６】[0036]
【実施例】以下実施例及び比較例を挙げて本発明をより
具体的に説明する。尚、実施例、比較例に用いた各成分
の詳細及び試験方法、評価を例示するが、本発明の趣旨
を逸脱しない限り、これらに限定されるものでは無い。The present invention will be described more specifically with reference to the following examples and comparative examples. The details, test methods, and evaluations of each component used in the examples and comparative examples are illustrated, but are not limited thereto without departing from the gist of the present invention.
【００３７】以下の材料及び方法で樹脂結合型磁石用組
成物及び磁石を製造し、評価した。用いた材料を下記に
示す。A composition and a magnet for a resin-bonded magnet were manufactured and evaluated by the following materials and methods. The materials used are shown below.
【００３８】Ａ 金属粉末 ・金属粉１：Ｎｄ−Ｆｅ−Ｂ 系磁性粉末（平均粒径１
００μｍ） （商品名：ＭＱＰ−Ｂ、マグネクエンチインターナショ
ナル社製） ・金属粉２：Ｓｍ−Ｆｅ−Ｎ 系磁性粉末 （商品名：Ｓｍ−Ｆｅ−Ｎ合金、住友金属鉱山（株）
製） ・金属粉３：純鉄 （商品名：アトミロン、昭和電工（株）製）A Metal powder Metal powder 1: Nd-Fe-B based magnetic powder (average particle size 1
(Product name: MQP-B, manufactured by Magnequench International Co.) Metal powder 2: Sm-Fe-N based magnetic powder (Product name: Sm-Fe-N alloy, Sumitomo Metal Mining Co., Ltd.)
・ Metal powder 3: Pure iron (trade name: Atomilon, manufactured by Showa Denko KK)
【００３９】Ｂ 末端基変成ポリアミド樹脂 表１中に記載した。B-terminal group-modified polyamide resin The results are shown in Table 1.
【００４０】次に各成形品の製造方法、評価方法を示す
と次のようになる。Next, the production method and evaluation method of each molded product are as follows.
【００４１】１．末端基変成ナイロンの作製 宇部興産（株）製ナイロン１２（ＵＢＥ３０１４Ｕ）１
００重量部に所定の脂肪酸を添加し、万能混合機に投入
後２５０℃、窒素雰囲気１．３気圧中で３時間反応さ
せ、冷却後所望のナイロンを得た。残存末端アミノ基の
同定は、滴定法による末端基定量法で行った。数平均分
子量はＧＰＣ法によって算出した。1. Preparation of Nylon with Modified End Group Nylon 12 (UBE3014U) 1 manufactured by Ube Industries, Ltd.
A predetermined fatty acid was added to 00 parts by weight, charged into a universal mixer, and reacted at 250 ° C. under a nitrogen atmosphere of 1.3 atm for 3 hours. After cooling, a desired nylon was obtained. The remaining terminal amino group was identified by a terminal group quantification method by a titration method. The number average molecular weight was calculated by the GPC method.
【００４２】２．組成物の混合及び作製 それぞれの金属粉全量に、所定の樹脂を所定の比率にな
るよう添加し（各重量部）、更に滑剤として、金属粉１
００重量部に対し規定量を加え、プラネタリーミキサー
中で十分混合撹拌させた。2. Mixing and Preparation of Composition To a total amount of each metal powder, a predetermined resin is added in a predetermined ratio (each part by weight).
The specified amount was added to 00 parts by weight, and the mixture was thoroughly mixed and stirred in a planetary mixer.
【００４３】これらにより得られた混合物をφ２０ｍｍ
シングル押出機（Ｌ／Ｄ＝２５、ＣＲ＝２．０、回転数
＝２０ｒｐｍ、５ｍｍφストランドダイ、シリンダー温
度２００〜２５０℃、ダイス温度２３０℃にて押し出
し、ホットカットペレタイザーにて約φ５ｍｍ×５ｍｍ
のペレットコンパウンドを作製した。The mixture obtained in this way is ２０20 mm
Single extruder (L / D = 25, CR = 2.0, rotation speed = 20 rpm, 5 mmφ strand die, extruded at a cylinder temperature of 200 to 250 ° C., die temperature of 230 ° C., and about φ5 mm × 5 mm with a hot cut pelletizer
Was prepared.
【００４４】３．射出成形方法 これらのペレットコンパウンドを（株）日本製鋼所製磁
場中射出成形機（Ｊ−２０ＭＩＩ）にてφ１０ｍｍ×１
５ｍｍの円柱及び１５ｍｍ×８ｍｍ×２ｍｍ矩形強度試
験用樹脂結合型磁石を同一条件（成形温度２２０〜３１
０℃、金型温度１００〜１２０℃）にて成形し、得られ
たこれらの成形品を後述の方法にてそれぞれ評価した。
尚、Ｓｍ−Ｆｅ−Ｎを使用した時のみ１５〜２０ｋＯｅ
の磁場中金型内にて成形を行った。3. Injection molding method: These pellet compounds are φ10 mm × 1 with a magnetic injection molding machine (J-20MII) manufactured by Japan Steel Works, Ltd.
A 5 mm cylinder and a 15 mm × 8 mm × 2 mm resin-bonded magnet for a rectangular strength test were used under the same conditions (forming temperatures 220 to 31).
(0 ° C., mold temperature 100 to 120 ° C.), and the obtained molded products were evaluated by the methods described below.
In addition, only when using Sm-Fe-N is 15 to 20 kOe.
Molding in a mold in a magnetic field.
【００４５】４．各評価方法 ・混練トルク それぞれ計量した各材料を東洋精機製作所製ラボプラス
トミルに投入し混練開始後５分目以降１時間目までの経
時的トルク変化を見た。その時の最大トルクを表１〜表
６に示す。4. Each evaluation method-Kneading torque Each weighed material was put into a Labo Plastomill manufactured by Toyo Seiki Seisaku-sho, and changes over time from 5 minutes to 1 hour after the start of kneading were observed. Tables 1 to 6 show the maximum torque at that time.
【００４６】・溶融流動性評価 ＪＩＳ Ｋ７２１０ 「流れ試験方法（参考試験）」に
準じ、ダイＢを使用、荷重３０ｋｇｆ、測定温度２５０
℃にて溶融組成物流れ値Ｑを求めた。その結果を表１〜
表６に示す。Evaluation of melt fluidity According to JIS K7210 “Flow test method (reference test)”, using die B, load 30 kgf, measuring temperature 250
The melt composition flow value Q was determined at ° C. Table 1 shows the results.
It is shown in Table 6.
【００４７】・高温時機械強度評価 ＪＩＳ Ｋ７２１４ 「プラスチックの打抜きによるせ
ん断試験方法」に準じ、ポンチ径は２．９７ｍｍ、ヘッ
ドスピードは１ｍｍ／分、サンプル形状はφ１０ｍｍ×
３ｍｍ厚の成形体として、１１０℃における剪断強さを
求めた。その結果を表１〜表６に示す。Evaluation of mechanical strength at high temperature According to JIS K7214 “Shear test method by punching plastic”, punch diameter is 2.97 mm, head speed is 1 mm / min, and sample shape is φ10 mm ×
The shear strength at 110 ° C. was determined for a molded article having a thickness of 3 mm. The results are shown in Tables 1 to 6.
【００４８】・成形可能最高温度評価 成形温度を通常の温度から徐々に上昇させ、著しい溶融
粘度低下に伴う成形限界最高温度を求めた。その結果を
表１〜表６に示す。各種経験から、この成形可能最高温
度が２６０℃以上は必要と言われている。Evaluation of Maximum Moldable Temperature The molding temperature was gradually increased from the ordinary temperature, and the maximum molding temperature associated with a significant decrease in melt viscosity was determined. The results are shown in Tables 1 to 6. From various experiences, it is said that the maximum moldable temperature is 260 ° C. or higher.
【００４９】[0049]
【表１】 [Table 1]
【００５０】[0050]
【表２】 [Table 2]
【００５１】[0051]
【表３】 [Table 3]
【００５２】[0052]
【表４】 [Table 4]
【００５３】[0053]
【表５】 [Table 5]
【００５４】[0054]
【表６】 [Table 6]
【００５５】[0055]
【発明の効果】以上のごとく、本発明の樹脂結合型磁石
用樹脂組成物は、末端基を変性し、かつ分子量、分子量
分布を限定することで、従来混練が難しかった鉄系材料
との優れた混合物特性、成形性を提供することができ、
例えば、一般家電製品、通信・音響機器、医療機器、一
般産業機器にいたる幅広い分野等で特に有用である。As described above, the resin composition for a resin-bonded magnet of the present invention is superior to an iron-based material which has conventionally been difficult to knead by modifying the terminal group and limiting the molecular weight and molecular weight distribution. Mixture properties and moldability can be provided,
For example, it is particularly useful in a wide range of fields such as general home appliances, communication / audio equipment, medical equipment, and general industrial equipment.
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Claims (7)
脂結合型金属組成物であって、該ポリアミド樹脂は、末
端アミノ基濃度が０〜２０ｍｍｏｌ／ｋｇ、分子量分布
が２．８〜１０、数平均分子量が５０００〜１５０００
である樹脂に、末端アミノ基濃度が０〜２０ｍｍｏｌ／
ｋｇ、数平均分子量１５０００〜３００００である樹脂
を５〜５０ｗｔ％混合することを特徴とする樹脂結合型
金属組成物。1. A resin-bonded metal composition comprising a metal powder and a polyamide resin, wherein the polyamide resin has a terminal amino group concentration of 0 to 20 mmol / kg, a molecular weight distribution of 2.8 to 10, and a number average Molecular weight of 5000-15000
The resin having a terminal amino group concentration of 0 to 20 mmol /
kg, a resin having a number average molecular weight of 15,000 to 30,000, and 5 to 50% by weight of a resin-bonded metal composition.
に非酸化状態の鉄元素を含む、請求項１に記載の樹脂結
合型金属組成物。2. The resin-bonded metal composition according to claim 1, wherein the metal powder contains at least a non-oxidized iron element in its constituent elements.
ル基濃度が０〜５００ｍｍｏｌ／ｋｇである請求項１ま
たは請求項２いずれかに記載の樹脂結合型金属組成物。3. The resin-bonded metal composition according to claim 1, wherein the polyamide resin has a terminal carboxyl group concentration of 0 to 500 mmol / kg.
ナイロン１２の構成単位を含む、ナイロンホモポリマー
またはナイロンコポリマーである請求項１〜請求項３い
ずれかに記載の樹脂結合型金属組成物。4. The resin-bonded metal composition according to claim 1, wherein the polyamide resin is a nylon homopolymer or a nylon copolymer containing a constituent unit of nylon 11 or nylon 12.
まれ、２５０℃における流れ値Ｑが５０×１０-3ｍｌ／
秒以上である請求項１〜請求項４いずれかに記載の樹脂
結合型金属組成物。5. The composition contains 50% by volume or more of metal powder, and has a flow value Q at 250 ° C. of 50 × 10 −3 ml / ml.
The resin-bonded metal composition according to any one of claims 1 to 4, which is not less than seconds.
の希土類元素を含む請求項１〜請求項５いずれかに記載
の樹脂結合型金属組成物。6. The resin-bonded metal composition according to claim 1, wherein at least one rare earth element is included in the constituent elements of the metal powder.
脂結合型金属組成物を射出成形または押出成形して得た
金属成形体。7. A metal molded product obtained by injection molding or extrusion molding the resin-bonded metal composition according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16870798A JP3478126B2 (en) | 1998-06-16 | 1998-06-16 | Resin-bonded metal composition and metal molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16870798A JP3478126B2 (en) | 1998-06-16 | 1998-06-16 | Resin-bonded metal composition and metal molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000003809A true JP2000003809A (en) | 2000-01-07 |
| JP3478126B2 JP3478126B2 (en) | 2003-12-15 |
Family
ID=15872970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16870798A Expired - Lifetime JP3478126B2 (en) | 1998-06-16 | 1998-06-16 | Resin-bonded metal composition and metal molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3478126B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1347471A2 (en) * | 2002-03-19 | 2003-09-24 | Toda Kogyo Corporation | Resin composition for bond magnet and bond magnet using the same |
| WO2003085684A1 (en) * | 2002-04-09 | 2003-10-16 | Aichi Steel Corporation | Composite rare earth anisotropic bonded magnet, compound for composite rare earth anisotropic bonded magnet, and method for production thereof |
| JP2005033843A (en) * | 2003-05-15 | 2005-02-03 | Aichi Steel Works Ltd | Dc brush motor and its permanent magnet |
| JP2005236225A (en) * | 2004-02-23 | 2005-09-02 | Daido Electronics Co Ltd | Compound for bonded magnet and rare-earth bonded magnet |
| US7357880B2 (en) * | 2003-10-10 | 2008-04-15 | Aichi Steel Corporation | Composite rare-earth anisotropic bonded magnet, composite rare-earth anisotropic bonded magnet compound, and methods for their production |
| US20180030236A1 (en) * | 2015-02-20 | 2018-02-01 | Asahi Kasei Kabushiki Kaisha | Polyamide resin composition, method for producing polyamide resin composition, and molded article |
-
1998
- 1998-06-16 JP JP16870798A patent/JP3478126B2/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1347471A2 (en) * | 2002-03-19 | 2003-09-24 | Toda Kogyo Corporation | Resin composition for bond magnet and bond magnet using the same |
| EP1347471A3 (en) * | 2002-03-19 | 2004-01-02 | Toda Kogyo Corporation | Resin composition for bond magnet and bond magnet using the same |
| US6787059B2 (en) | 2002-03-19 | 2004-09-07 | Toda Kogyo Corporation | Resin composition for bonded magnet and bonded magnet using the same |
| WO2003085684A1 (en) * | 2002-04-09 | 2003-10-16 | Aichi Steel Corporation | Composite rare earth anisotropic bonded magnet, compound for composite rare earth anisotropic bonded magnet, and method for production thereof |
| WO2003085683A1 (en) * | 2002-04-09 | 2003-10-16 | Aichi Steel Corporation | Composite rare earth anisotropic bonded magnet, compound for composite rare earth anisotropic bonded magnet and method for preparation thereof |
| JP2005033843A (en) * | 2003-05-15 | 2005-02-03 | Aichi Steel Works Ltd | Dc brush motor and its permanent magnet |
| US7357880B2 (en) * | 2003-10-10 | 2008-04-15 | Aichi Steel Corporation | Composite rare-earth anisotropic bonded magnet, composite rare-earth anisotropic bonded magnet compound, and methods for their production |
| JP2005236225A (en) * | 2004-02-23 | 2005-09-02 | Daido Electronics Co Ltd | Compound for bonded magnet and rare-earth bonded magnet |
| US20180030236A1 (en) * | 2015-02-20 | 2018-02-01 | Asahi Kasei Kabushiki Kaisha | Polyamide resin composition, method for producing polyamide resin composition, and molded article |
| US10927232B2 (en) * | 2015-02-20 | 2021-02-23 | Asahi Kasei Kabushiki Kaisha | Polyamide resin composition, method for producing polyamide resin composition, and molded article |
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|---|---|
| JP3478126B2 (en) | 2003-12-15 |
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