JPH04257203A - Plastic magnet composite - Google Patents
Plastic magnet compositeInfo
- Publication number
- JPH04257203A JPH04257203A JP3039536A JP3953691A JPH04257203A JP H04257203 A JPH04257203 A JP H04257203A JP 3039536 A JP3039536 A JP 3039536A JP 3953691 A JP3953691 A JP 3953691A JP H04257203 A JPH04257203 A JP H04257203A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic powder
- coupling agent
- plastic magnet
- thermal stability
- titanate
- 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
- 239000004033 plastic Substances 0.000 title claims abstract description 23
- 229920003023 plastic Polymers 0.000 title claims abstract description 23
- 239000002131 composite material Substances 0.000 title abstract 3
- 239000006247 magnetic powder Substances 0.000 claims abstract description 34
- 239000007822 coupling agent Substances 0.000 claims abstract description 27
- 239000000203 mixture Substances 0.000 claims abstract description 24
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910001172 neodymium magnet Inorganic materials 0.000 claims abstract description 18
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 13
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000004677 Nylon Substances 0.000 claims abstract description 7
- 229920001778 nylon Polymers 0.000 claims abstract description 7
- 239000000314 lubricant Substances 0.000 claims abstract description 6
- 230000005291 magnetic effect Effects 0.000 abstract description 8
- 239000012778 molding material Substances 0.000 description 8
- 239000011248 coating agent Substances 0.000 description 7
- 238000000576 coating method Methods 0.000 description 7
- 238000001746 injection moulding Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- JHWNWJKBPDFINM-UHFFFAOYSA-N Laurolactam Chemical compound O=C1CCCCCCCCCCCN1 JHWNWJKBPDFINM-UHFFFAOYSA-N 0.000 description 4
- 239000000155 melt Substances 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- IEKHISJGRIEHRE-UHFFFAOYSA-N 16-methylheptadecanoic acid;propan-2-ol;titanium Chemical compound [Ti].CC(C)O.CC(C)CCCCCCCCCCCCCCC(O)=O.CC(C)CCCCCCCCCCCCCCC(O)=O.CC(C)CCCCCCCCCCCCCCC(O)=O IEKHISJGRIEHRE-UHFFFAOYSA-N 0.000 description 3
- 208000015943 Coeliac disease Diseases 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 229920000299 Nylon 12 Polymers 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 235000014113 dietary fatty acids Nutrition 0.000 description 3
- 239000000194 fatty acid Substances 0.000 description 3
- 229930195729 fatty acid Natural products 0.000 description 3
- 150000004665 fatty acids Chemical class 0.000 description 3
- 238000011049 filling Methods 0.000 description 3
- -1 isopropyl tridecylbenzenesulfonyl titanate Chemical compound 0.000 description 3
- 238000004898 kneading Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000011282 treatment Methods 0.000 description 3
- PBLZLIFKVPJDCO-UHFFFAOYSA-N 12-aminododecanoic acid Chemical compound NCCCCCCCCCCCC(O)=O PBLZLIFKVPJDCO-UHFFFAOYSA-N 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 2
- HQKMJHAJHXVSDF-UHFFFAOYSA-L magnesium stearate Chemical compound [Mg+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O HQKMJHAJHXVSDF-UHFFFAOYSA-L 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- HIQAWCBKWSQMRQ-UHFFFAOYSA-N 16-methylheptadecanoic acid;2-methylprop-2-enoic acid;propan-2-ol;titanium Chemical compound [Ti].CC(C)O.CC(=C)C(O)=O.CC(=C)C(O)=O.CC(C)CCCCCCCCCCCCCCC(O)=O HIQAWCBKWSQMRQ-UHFFFAOYSA-N 0.000 description 1
- 229910000521 B alloy Inorganic materials 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910000583 Nd alloy Inorganic materials 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- UMHKOAYRTRADAT-UHFFFAOYSA-N [hydroxy(octoxy)phosphoryl] octyl hydrogen phosphate Chemical compound CCCCCCCCOP(O)(=O)OP(O)(=O)OCCCCCCCC UMHKOAYRTRADAT-UHFFFAOYSA-N 0.000 description 1
- MQPPCKJJFDNPHJ-UHFFFAOYSA-K aluminum;3-oxohexanoate Chemical compound [Al+3].CCCC(=O)CC([O-])=O.CCCC(=O)CC([O-])=O.CCCC(=O)CC([O-])=O MQPPCKJJFDNPHJ-UHFFFAOYSA-K 0.000 description 1
- YNCDEEFMDXHURQ-UHFFFAOYSA-N aluminum;ethyl 3-oxobutanoate Chemical compound [Al].CCOC(=O)CC(C)=O YNCDEEFMDXHURQ-UHFFFAOYSA-N 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- XMQYIPNJVLNWOE-UHFFFAOYSA-N dioctyl hydrogen phosphite Chemical compound CCCCCCCCOP(O)OCCCCCCCC XMQYIPNJVLNWOE-UHFFFAOYSA-N 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 235000019359 magnesium stearate Nutrition 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000007151 ring opening polymerisation reaction Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000003756 stirring Methods 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
- H01F1/047—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
- H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
- H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
- H01F1/0575—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together
- H01F1/0578—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together bonded together
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、モーター及び磁場発生
装置の部品などに好適に用いることができる高性能を示
す射出用プラスチック磁石組成物に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic magnet composition for injection that exhibits high performance and can be suitably used for parts of motors and magnetic field generators.
【０００２】0002
【従来の技術】近年、モーターや磁場発生装置の部品と
して、焼結磁石に代わって、１２ナイロンを始めとする
ポリアミド系樹脂と強磁性粉末とを混合混練して得られ
た成形用材料を、射出成形法により成形したプラスチッ
ク磁石が用いられることが多くなった。この射出成形法
により得られたプラスチック磁石は、焼結磁石に比べ、
成形加工性，寸法安定性，機械的物性に優れており、ま
た、押出や圧縮成形法により得られるプラスチック磁石
に比べ、成形加工性が優れている。[Prior Art] In recent years, molding materials obtained by mixing and kneading polyamide resins such as 12 nylon and ferromagnetic powder have been used as parts of motors and magnetic field generators in place of sintered magnets. Plastic magnets molded by injection molding are increasingly being used. Compared to sintered magnets, the plastic magnets obtained by this injection molding method are
It has excellent moldability, dimensional stability, and mechanical properties, and is also superior to plastic magnets obtained by extrusion or compression molding.
【０００３】従来、磁性粉末としては、フェライト系の
磁性粉末が用いられてきたが、最近の磁石体の強力化，
小型・軽量化の要請から、当初のフェライト系に代わっ
てＳｍ−Ｃｏ系のような極めて優れた磁石性能を発揮す
る磁性粉末が使用されている。しかし、Ｓｍは、埋蔵量
が特に少ないことと、精製分離に多大の費用を要するこ
とにより、安定供給に問題がある。この様な背景下、Ｓ
ｍ−Ｃｏ系に比べ、より高磁気性能を有し、かつ資源的
にも豊富なＮｄ−Ｆｅ−Ｂ系の磁性粉末が開発され、現
在、これを混合したプラスチック磁石が市場を拡大して
いる。Conventionally, ferrite-based magnetic powder has been used as the magnetic powder, but recently the magnets have become stronger,
Due to the demand for smaller size and lighter weight, magnetic powders such as Sm-Co based which exhibit extremely excellent magnetic performance are being used in place of the original ferrite based powders. However, Sm has problems in stable supply because its reserves are particularly small and purification and separation requires a large amount of cost. Against this background, S.
Nd-Fe-B-based magnetic powder, which has higher magnetic performance than m-Co-based powder and is rich in resources, has been developed, and the market for plastic magnets made with this mixture is currently expanding. .
【０００４】プラスチック磁石において、磁性粉末の充
填率は、磁気性能に大きく影響を与え、充填率が高けれ
ば磁気性能も高くなる。しかしながら、充填率を上げれ
ば、成形用材料の溶融流動性が不良となるため、射出成
形加工が困難となる。[0004] In plastic magnets, the filling rate of magnetic powder has a large effect on magnetic performance, and the higher the filling rate, the higher the magnetic performance. However, if the filling rate is increased, the melt flowability of the molding material becomes poor, making injection molding difficult.
【０００５】Ｎｄ−Ｆｅ−Ｂ系磁性粉末を９０重量％以
上含む１２ナイロンをベースとする成形用材料の場合、
少量の成形用材料でもシリンダーに残っている状態で成
形作業を中断すれば、シリンダー中に残っていた成形用
材料の溶融流動性は、時間と共に著しく低下し、数分後
には成形作業の再開が不可能となり、非常に熱安定性が
悪い。[0005] In the case of a molding material based on nylon 12 containing 90% by weight or more of Nd-Fe-B magnetic powder,
If the molding operation is interrupted while even a small amount of molding material remains in the cylinder, the melt fluidity of the molding material remaining in the cylinder will decrease significantly over time, and the molding operation will be restarted after a few minutes. impossible, and the thermal stability is very poor.
【０００６】また、Ｓｍ−Ｃｏ系やＮｄ−Ｆｅ−Ｂ系の
希土類元素を含む磁性粉末は高価なため、射出成形時に
廃棄物として生じるスプルー及びランナーを再び使用す
る、いわゆるリサイクルする必要がある。一般には、ス
プルー及びランナーを粉砕して、新しく混合された成形
用材料と適当な割合で混合して成形に供し、廃棄物とし
て生じたスプルー及びランナーを再び粉砕して成形に供
す方法が行われる。[0006] Furthermore, since magnetic powders containing rare earth elements such as Sm--Co and Nd--Fe-- B are expensive, it is necessary to reuse sprues and runners produced as waste during injection molding, ie, recycling. Generally, sprue and runners are crushed, mixed with newly mixed molding material in an appropriate ratio and used for molding, and the sprue and runners generated as waste are crushed again and used for molding. .
【０００７】しかしながら、上記Ｎｄ−Ｆｅ−Ｂ系磁性
粉末を９０重量％以上含む１２ナイロンをベースとする
成形用材料の場合、熱履歴を受けたリサイクル品の溶融
流動性は、熱安定性が不良のため、混合されたばかりの
成形用材料に比べ著しく劣り、成形不可能であった。However, in the case of a molding material based on nylon 12 containing 90% by weight or more of Nd-Fe-B magnetic powder, the melt fluidity of the recycled product that has undergone thermal history is poor in thermal stability. Therefore, it was significantly inferior to the freshly mixed molding material and could not be molded.
【０００８】[0008]
【発明が解決しようとする課題】本発明は、このような
事情に鑑みなされたものであって、その目的とするとこ
ろは、熱安定性が良好で、経時の溶融流動性に優れたプ
ラスチック磁石組成物を提供するにある。[Problems to be Solved by the Invention] The present invention was made in view of the above circumstances, and its object is to provide a plastic magnet that has good thermal stability and excellent melt flowability over time. To provide a composition.
【０００９】[0009]
【課題を解決するための手段】上記の目的は、Ｎｄ−Ｆ
ｅ−Ｂ系磁性粉末９０〜９５重量％、滑剤及び１２ナイ
ロンを含有するプラスチック磁石組成物であって、該Ｎ
ｄ−Ｆｅ−Ｂ系磁性粉末がアルミニウム系カップリング
剤及びチタネート系カップリング剤で被覆されているこ
とを特徴とするプラスチック磁石組成物によって達成さ
れる。[Means for solving the problem] The above purpose is to
A plastic magnet composition containing 90 to 95% by weight of e-B magnetic powder, a lubricant, and 12 nylon, the N
This is achieved by a plastic magnet composition characterized in that d-Fe-B magnetic powder is coated with an aluminum coupling agent and a titanate coupling agent.
【００１０】すなわち、本発明者らは、Ｎｄ−Ｆｅ−Ｂ
系磁性粉末を、予めアルミニウム系カップリング剤とチ
タネート系カップリング剤とで被覆処理したものを使用
することにより、磁性粉末が９０重量％以上の高充填組
成の場合でも、良好な熱安定性を有するプラスチック磁
石組成物が得られることを確認し、本発明を完成した。[0010] That is, the present inventors discovered that Nd-Fe-B
By using a magnetic powder that has been coated with an aluminum coupling agent and a titanate coupling agent, good thermal stability can be achieved even when the magnetic powder has a highly filled composition of 90% by weight or more. The present invention was completed by confirming that a plastic magnet composition having the following properties could be obtained.
【００１１】以下、本発明を詳細に説明する。まず、本
発明に使用するＮｄ−Ｆｅ−Ｂ系磁性粉末は、ネオジム
・鉄・ホウ素の溶融合金から超急冷薄帯法で作られたも
のが挙げられ、通常、当業界において、一般に射出成形
用プラスチック磁石に使用されているものでよい。かか
るＮｄ−Ｆｅ−Ｂ系磁性粉末としては、例えば、米国Ｇ
Ｍ社が製造している“ＭＱパウダー”が好ましい。The present invention will be explained in detail below. First, the Nd-Fe-B magnetic powder used in the present invention is made from a molten alloy of neodymium, iron, and boron by the ultra-quenched ribbon method, and is generally used in the industry for injection molding. Anything used in plastic magnets may be used. Such Nd-Fe-B magnetic powders include, for example, US G.
"MQ Powder" manufactured by M Company is preferred.
【００１２】この本発明に使用するＮｄ−Ｆｅ−Ｂ系磁
性粉末の配合量は、プラスチック磁石組成物全体重量中
９０〜９５重量％にすることが肝要である。Ｎｄ−Ｆｅ
−Ｂ系磁性粉末の配合量が９０重量％未満の場合、磁気
性能が不充分である。一方、９５重量％を超える場合、
熱安定性が不良となると共に、初期流動性が不充分とな
る。It is important that the amount of the Nd-Fe-B magnetic powder used in the present invention is 90 to 95% by weight based on the total weight of the plastic magnet composition. Nd-Fe
If the blending amount of the -B magnetic powder is less than 90% by weight, the magnetic performance is insufficient. On the other hand, if it exceeds 95% by weight,
The thermal stability becomes poor and the initial fluidity becomes insufficient.
【００１３】本発明に使用するＮｄ−Ｆｅ−Ｂ系磁性粉
末は、予め、アルミニウム系カップリング剤及びチタネ
ート系カップリング剤で被覆されていることが必要であ
る。このような磁性粉末を使用することにより、熱安定
性が良好で、経時の溶融流動性に優れたプラスチック磁
石組成物が得られる。The Nd-Fe-B magnetic powder used in the present invention must be coated with an aluminum coupling agent and a titanate coupling agent in advance. By using such magnetic powder, a plastic magnet composition with good thermal stability and excellent melt flowability over time can be obtained.
【００１４】本発明に使用するアルミニウム系カップリ
ング剤としては、通常、フィラーの表面処理に用いられ
るものを使用すればよく、アセトアルコキシアルミニウ
ムジイソプロピレート、アルミニウムエチルアセトアセ
テートジイソプロピレート、アルミニウムトリス（エチ
ルアセトアセテート）等が挙げられ、特に、アセトアル
コキシアルミニウムジイソプロピレートが好ましい。本
発明に使用するアルミニウム系カップリング剤の配合量
は、Ｎｄ−Ｆｅ−Ｂ系磁性粉末１００重量部に対して、
０．５重量部以上とすることが好ましい。As the aluminum coupling agent used in the present invention, those normally used for surface treatment of fillers may be used, such as acetalkoxyaluminum diisopropylate, aluminum ethyl acetoacetate diisopropylate, aluminum tris( ethylacetoacetate), and acetalkoxyaluminum diisopropylate is particularly preferred. The amount of the aluminum coupling agent used in the present invention is based on 100 parts by weight of the Nd-Fe-B magnetic powder.
The amount is preferably 0.5 parts by weight or more.
【００１５】また、本発明に使用するチタネート系カッ
プリング剤も、通常、フィラーの表面処理に用いられる
ものを使用すればよく、例えば、イソプロピルトリイソ
ステアロイルチタネート、イソプロピルトリデシルベン
ゼンスルホニルチタネート、テトライソプロピルビス（
ジオクチルホスファイト）チタネート、ビス（ジオクチ
ルパイロホスフェート）オキシアセテートチタネート、
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
ピルトリクミルフェニルチタネート、イソプロピルトリ
（Ｎ−アミノエチル−アミノエチル）チタネート等が挙
げられる。[0015] Furthermore, the titanate coupling agent used in the present invention may be one that is normally used for surface treatment of fillers, such as isopropyl triisostearoyl titanate, isopropyl tridecylbenzenesulfonyl titanate, tetraisopropyl Screw(
dioctyl phosphite) titanate, bis(dioctyl pyrophosphate) oxyacetate titanate,
Isopropyltrioctanoyltitanate, isopropyldimethacrylisostearoyltitanate, isopropyltricumylphenyltitanate, isopropyltri(N-aminoethyl-aminoethyl)titanate, and the like.
【００１６】これらの中でも、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（Ｎ−アミノ
エチル−アミノエチル）チタネートを用いることが好ま
しい。本発明に使用するチタネート系カップリング剤の
配合量は、Ｎｄ−Ｆｅ−Ｂ系磁性粉末１００重量部に対
して、１重量部以上とすることが好ましい。Among these, it is preferable to use isopropyl triisostearoyl titanate and isopropyl tri(N-aminoethyl-aminoethyl) titanate. The amount of the titanate coupling agent used in the present invention is preferably 1 part by weight or more per 100 parts by weight of the Nd-Fe-B magnetic powder.
【００１７】本発明に於いて、Ｎｄ−Ｆｅ−Ｂ系磁性粉
末の被覆処理方法は、アルミニウム系カップリング剤で
磁性粉末を被覆処理した後、チタネート系カップリング
剤で被覆処理してもよいし、チタネート系カップリング
剤で磁性粉末を被覆処理した後、アルミニウム系カップ
リング剤で被覆処理してもよい。また、両者を同時に用
いて被覆処理を行ってもよい。In the present invention, the method for coating the Nd-Fe-B magnetic powder may include coating the magnetic powder with an aluminum coupling agent and then coating it with a titanate coupling agent. After the magnetic powder is coated with a titanate coupling agent, the magnetic powder may be coated with an aluminum coupling agent. Further, the coating treatment may be performed using both at the same time.
【００１８】本発明に使用する滑剤としては、特に制限
は無く、一般にポリアミドの流動性を改良するために使
用されているものであればよい。例えば、脂肪酸，脂肪
酸金属塩，脂肪酸アミド等が挙げられる。この本発明に
使用する滑剤の配合量は、プラスチック磁石組成物全体
重量中０．１〜０．５重量％とすればよい。The lubricant used in the present invention is not particularly limited, and any lubricant that is generally used to improve the fluidity of polyamides may be used. Examples include fatty acids, fatty acid metal salts, fatty acid amides, and the like. The amount of the lubricant used in the present invention may be 0.1 to 0.5% by weight based on the total weight of the plastic magnet composition.
【００１９】また、本発明に使用する１２ナイロンは、
ω−ラウロラクタムの開環重合、又は１２−アミノドデ
カン酸の重縮合で得られるものである。この本発明に使
用する１２ナイロンの配合量は、プラスチック磁石組成
物全体重量中１．７〜９．５重量％とすればよい。[0019] Furthermore, the 12 nylon used in the present invention is
It is obtained by ring-opening polymerization of ω-laurolactam or polycondensation of 12-aminododecanoic acid. The amount of nylon 12 used in the present invention may be 1.7 to 9.5% by weight based on the total weight of the plastic magnet composition.
【００２０】本発明のプラスチック磁石組成物は、最終
成形品となるまで充分に混練，分散されていることが重
要である。このための方法としては、例えば、１２ナイ
ロンとして粉末樹脂を用い、異方向回転２軸混練押出機
を用いてペレット状の樹脂を作ればよい。It is important that the plastic magnet composition of the present invention is sufficiently kneaded and dispersed until it becomes a final molded product. As a method for this purpose, for example, a powdered resin may be used as 12 nylon, and a pellet-shaped resin may be made using a twin-screw kneading extruder rotating in different directions.
【００２１】[0021]
【発明の効果】本発明のプラスチック磁石組成物は、Ｎ
ｄ−Ｆｅ−Ｂ系磁性粉末の表面がアルミニウム系カップ
リング剤及びチタネート系カップリング剤で被覆された
ものを用いることにより、溶融時の熱安定性が良好で、
経時による溶融流動性に優れ、射出成形加工を良好に行
うことができる。Effects of the Invention The plastic magnet composition of the present invention has N
By using a d-Fe-B magnetic powder whose surface is coated with an aluminum coupling agent and a titanate coupling agent, it has good thermal stability during melting.
It has excellent melt flowability over time and can be easily processed by injection molding.
【００２２】以下、実施例を挙げて本発明を具体的に説
明する。尚、熱安定性の評価は下記の方法に従った。す
なわち、２９０℃に於いて滞溜させた時の溶融流動性の
経時変化（５分，１５分，６０分）をフローテスター法
（荷重１６０ｋｇｆ）で測定した。The present invention will be specifically explained below with reference to Examples. The thermal stability was evaluated according to the following method. That is, the change in melt fluidity over time (5 minutes, 15 minutes, 60 minutes) during retention at 290° C. was measured using a flow tester method (load: 160 kgf).
【００２３】〔実施例１〜５、比較例１〕Ｎｄ−Ｆｅ−
Ｂ系磁性粉末をヘンシェルミキサーに仕込み、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（味の素社製，ＡＬ−Ｍ）を表
１に示す組成で配合し、攪拌して被覆処理を行った。次
に、チタネート系カップリング剤としてイソプロピルト
リ（Ｎ−アミノエチル−アミノエチル）チタネート（味
の素社製，ＫＲ−４４）を表１に示す組成で配合し、攪
拌して被覆処理を行った。[Examples 1 to 5, Comparative Example 1] Nd-Fe-
B-based magnetic powder was placed in a Henschel mixer, and acetalkoxyaluminum diisopropylate (AL-M, manufactured by Ajinomoto Co., Ltd.) was blended as an aluminum-based coupling agent in the composition shown in Table 1, and coated by stirring. Next, isopropyl tri(N-aminoethyl-aminoethyl) titanate (manufactured by Ajinomoto Co., Ltd., KR-44) was blended as a titanate-based coupling agent in the composition shown in Table 1, and the mixture was stirred for coating.
【００２４】次に、上述のアルミニウム系カップリング
剤及びチタネート系カップリング剤で被覆されたＮｄ−
Ｆｅ−Ｂ系磁性粉末、ステアリン酸マグネシウム及び粉
体化した１２ナイロン（ダイセル・ビルス社製，Ｌ−１
６４０）を表１，表２に示す組成で配合し、３０ｍｍ径
の２軸異方向回転混練押出機を用いてペレット化し、溶
融流動性の測定に供した。その結果を表１，表２にあわ
せて示す。Next, Nd-coated with the above-mentioned aluminum coupling agent and titanate coupling agent
Fe-B magnetic powder, magnesium stearate, and powdered 12 nylon (manufactured by Daicel Bils, L-1
640) was blended with the compositions shown in Tables 1 and 2, pelletized using a 30 mm diameter twin-shaft, counterrotating kneading extruder, and subjected to measurement of melt fluidity. The results are shown in Tables 1 and 2.
【００２５】〔比較例２〜４〕Ｎｄ−Ｆｅ−Ｂ系磁性粉
末にいずれかの被覆処理のみ、または、いずれの被覆処
理も行わなかったものを使用したことを除いては、実施
例１と同様に表１に示す組成で配合し、ペレット化後、
溶融流動性の測定に供した。その結果を表１，表２にあ
わせて示す。[Comparative Examples 2 to 4] Example 1 except that the Nd-Fe-B magnetic powder was subjected to one of the coating treatments or not to any coating treatment. Similarly, after blending with the composition shown in Table 1 and pelletizing,
It was used to measure melt fluidity. The results are shown in Tables 1 and 2.
【００２６】[0026]
【表１】[Table 1]
【００２７】[0027]
【表２】[Table 2]
【００２８】以上の結果より、実施例に係るプラスチッ
ク磁石組成物は、いずれも熱安定性が良好で、経時によ
る溶融流動性に優れていた。一方、比較例に係るプラス
チック磁石組成物は、経時により溶融流動性は低下し、
溶融流動値が測定不能となった。From the above results, all of the plastic magnet compositions of Examples had good thermal stability and excellent melt flowability over time. On the other hand, in the plastic magnet composition according to the comparative example, the melt fluidity decreases over time,
Melt flow value became unmeasurable.
【００２９】〔実施例６、７〕チタネート系カップリン
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（味の素社製，ＫＲ−ＴＴＳ）を表３に示す組成で配
合し、その他は実施例１と同様にしてペレットを得、溶
融流動性の測定に供した。その結果を表３，表４にあわ
せて示す。[Examples 6 and 7] Isopropyl triisostearoyl titanate (manufactured by Ajinomoto Co., Ltd., KR-TTS) was blended as a titanate coupling agent in the composition shown in Table 3, and pellets were made in the same manner as in Example 1. was obtained and subjected to measurement of melt fluidity. The results are also shown in Tables 3 and 4.
【００３０】[0030]
【表３】[Table 3]
【００３１】[0031]
【表４】[Table 4]
Claims (1)
重量％、滑剤及び１２ナイロンを含有するプラスチック
磁石組成物であって、該Ｎｄ−Ｆｅ−Ｂ系磁性粉末が、
アルミニウム系カップリング剤及びチタネート系カップ
リング剤で被覆されていることを特徴とするプラスチッ
ク磁石組成物。[Claim 1] Nd-Fe-B magnetic powder 90-95
% by weight, a lubricant and 12 nylon, the Nd-Fe-B magnetic powder comprising:
A plastic magnet composition coated with an aluminum coupling agent and a titanate coupling agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3039536A JPH04257203A (en) | 1991-02-08 | 1991-02-08 | Plastic magnet composite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3039536A JPH04257203A (en) | 1991-02-08 | 1991-02-08 | Plastic magnet composite |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04257203A true JPH04257203A (en) | 1992-09-11 |
Family
ID=12555775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3039536A Pending JPH04257203A (en) | 1991-02-08 | 1991-02-08 | Plastic magnet composite |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04257203A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0853599A2 (en) * | 1995-09-07 | 1998-07-22 | Thermat Precision Technologies Inc. | Powder and binder systems for use in powder molding |
| US7390579B2 (en) | 2003-11-25 | 2008-06-24 | Magnequench, Inc. | Coating formulation and application of organic passivation layer onto iron-based rare earth powders |
| US20170100862A1 (en) * | 2015-10-09 | 2017-04-13 | Lexmark International, Inc. | Injection-Molded Physical Unclonable Function |
| US10410779B2 (en) | 2015-10-09 | 2019-09-10 | Lexmark International, Inc. | Methods of making physical unclonable functions having magnetic and non-magnetic particles |
| US10566296B2 (en) | 2017-11-09 | 2020-02-18 | Lexmark International, Inc. | Physical unclonable functions in bank cards or identification cards for security |
| CN114479430A (en) * | 2022-01-11 | 2022-05-13 | 滁州杰事杰新材料有限公司 | Polyurethane composition and preparation method thereof |
-
1991
- 1991-02-08 JP JP3039536A patent/JPH04257203A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0853599A2 (en) * | 1995-09-07 | 1998-07-22 | Thermat Precision Technologies Inc. | Powder and binder systems for use in powder molding |
| EP0853599A4 (en) * | 1995-09-07 | 1999-09-22 | Thermat Precision Technology I | Powder and binder systems for use in powder molding |
| US7390579B2 (en) | 2003-11-25 | 2008-06-24 | Magnequench, Inc. | Coating formulation and application of organic passivation layer onto iron-based rare earth powders |
| US8313801B2 (en) | 2003-11-25 | 2012-11-20 | Magnequench, Inc. | Coating formulation and application of organic passivation layer onto iron-based rare earth powders |
| EP2653302A2 (en) | 2003-11-25 | 2013-10-23 | Magnequench, Inc. | Coating formulation and application of organic passivation layer onto iron-based rare earth powders |
| US20170100862A1 (en) * | 2015-10-09 | 2017-04-13 | Lexmark International, Inc. | Injection-Molded Physical Unclonable Function |
| US20190143569A1 (en) * | 2015-10-09 | 2019-05-16 | Lexmark International, Inc. | Injection-Molded Physical Unclonable Function |
| US10410779B2 (en) | 2015-10-09 | 2019-09-10 | Lexmark International, Inc. | Methods of making physical unclonable functions having magnetic and non-magnetic particles |
| US11356287B2 (en) | 2015-10-09 | 2022-06-07 | Lexmark International, Inc. | Injection-molded physical unclonable function |
| US10566296B2 (en) | 2017-11-09 | 2020-02-18 | Lexmark International, Inc. | Physical unclonable functions in bank cards or identification cards for security |
| CN114479430A (en) * | 2022-01-11 | 2022-05-13 | 滁州杰事杰新材料有限公司 | Polyurethane composition and preparation method thereof |
| CN114479430B (en) * | 2022-01-11 | 2023-08-15 | 滁州杰事杰新材料有限公司 | Polyurethane composition and preparation method thereof |
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