JPH0429302A - Nd-fe-b plastic magnetic composition - Google Patents
Nd-fe-b plastic magnetic compositionInfo
- Publication number
- JPH0429302A JPH0429302A JP2132638A JP13263890A JPH0429302A JP H0429302 A JPH0429302 A JP H0429302A JP 2132638 A JP2132638 A JP 2132638A JP 13263890 A JP13263890 A JP 13263890A JP H0429302 A JPH0429302 A JP H0429302A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic powder
- magnetic
- plastic
- silane
- plastic 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
- 239000004033 plastic Substances 0.000 title claims abstract description 32
- 229920003023 plastic Polymers 0.000 title claims abstract description 32
- 239000000203 mixture Substances 0.000 title claims abstract description 20
- 239000006247 magnetic powder Substances 0.000 claims abstract description 45
- 229910001172 neodymium magnet Inorganic materials 0.000 claims abstract description 24
- 229910052751 metal Inorganic materials 0.000 claims abstract description 13
- 239000002184 metal Substances 0.000 claims abstract description 13
- 229920000642 polymer Polymers 0.000 claims abstract description 12
- 150000004703 alkoxides Chemical class 0.000 claims abstract description 10
- 239000011230 binding agent Substances 0.000 claims abstract description 9
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical group [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 11
- 229910000077 silane Inorganic materials 0.000 claims description 11
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 10
- 150000001875 compounds Chemical class 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 abstract description 9
- 238000007254 oxidation reaction Methods 0.000 abstract description 9
- 239000011247 coating layer Substances 0.000 abstract description 8
- 239000011248 coating agent Substances 0.000 abstract description 7
- 238000000576 coating method Methods 0.000 abstract description 6
- 229910044991 metal oxide Inorganic materials 0.000 abstract description 5
- 238000011282 treatment Methods 0.000 abstract description 3
- 239000010410 layer Substances 0.000 abstract description 2
- 229910020442 SiO2—TiO2 Inorganic materials 0.000 abstract 1
- 238000000034 method Methods 0.000 description 11
- -1 phosphorus compound Chemical class 0.000 description 8
- 239000000243 solution Substances 0.000 description 8
- 239000002245 particle Substances 0.000 description 7
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 6
- 229910052698 phosphorus Inorganic materials 0.000 description 6
- 239000011574 phosphorus Substances 0.000 description 6
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 5
- 238000004381 surface treatment Methods 0.000 description 5
- 238000004898 kneading Methods 0.000 description 4
- 150000004706 metal oxides Chemical class 0.000 description 4
- 239000005300 metallic glass Substances 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 229910052761 rare earth metal Inorganic materials 0.000 description 4
- 150000002910 rare earth metals Chemical class 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000003078 antioxidant effect Effects 0.000 description 2
- RCJVRSBWZCNNQT-UHFFFAOYSA-N dichloridooxygen Chemical compound ClOCl RCJVRSBWZCNNQT-UHFFFAOYSA-N 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 239000006249 magnetic particle Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 229920005992 thermoplastic resin Polymers 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
- 239000008096 xylene Substances 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- RYSXWUYLAWPLES-MTOQALJVSA-N (Z)-4-hydroxypent-3-en-2-one titanium Chemical compound [Ti].C\C(O)=C\C(C)=O.C\C(O)=C\C(C)=O.C\C(O)=C\C(C)=O.C\C(O)=C\C(C)=O RYSXWUYLAWPLES-MTOQALJVSA-N 0.000 description 1
- RWLALWYNXFYRGW-UHFFFAOYSA-N 2-Ethyl-1,3-hexanediol Chemical compound CCCC(O)C(CC)CO RWLALWYNXFYRGW-UHFFFAOYSA-N 0.000 description 1
- IHEDBVUTTQXGSJ-UHFFFAOYSA-M 2-[bis(2-oxidoethyl)amino]ethanolate;titanium(4+);hydroxide Chemical compound [OH-].[Ti+4].[O-]CCN(CC[O-])CC[O-] IHEDBVUTTQXGSJ-UHFFFAOYSA-M 0.000 description 1
- 229910020451 K2SiO3 Inorganic materials 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 230000001476 alcoholic effect Effects 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- FPCJKVGGYOAWIZ-UHFFFAOYSA-N butan-1-ol;titanium Chemical compound [Ti].CCCCO.CCCCO.CCCCO.CCCCO FPCJKVGGYOAWIZ-UHFFFAOYSA-N 0.000 description 1
- 238000005524 ceramic coating Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229960005082 etohexadiol Drugs 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- KQJBQMSCFSJABN-UHFFFAOYSA-N octadecan-1-olate;titanium(4+) Chemical compound [Ti+4].CCCCCCCCCCCCCCCCCC[O-].CCCCCCCCCCCCCCCCCC[O-].CCCCCCCCCCCCCCCCCC[O-].CCCCCCCCCCCCCCCCCC[O-] KQJBQMSCFSJABN-UHFFFAOYSA-N 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000003381 stabilizer Substances 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
- H01F1/0572—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 with a protective layer
Landscapes
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Powder Metallurgy (AREA)
- Hard Magnetic Materials (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は新規なＮｄ−Ｆｅ−Ｂ系プラスチック磁石組成
物、さらに詳しくは、高湿の厳しい環境下でも極めて酸
化されにくく、安定した磁気特性を有するプラスチック
磁石を与えうるＮｄ−Ｆｅ−Ｂ系プラスチック磁石組成
物に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a novel Nd-Fe-B plastic magnet composition, more specifically, it is extremely resistant to oxidation and has stable magnetic properties even in a harsh high-humidity environment. The present invention relates to a Nd-Fe-B plastic magnet composition that can provide a plastic magnet.
従来の技術
近年、プラスチック磁石は、従来の等方性焼結フェライ
ト磁石の磁力特性を十分に保持している上、成形加工性
か良い、衝撃強度が高い、軽量である、なとの利点を有
することから、高機能性材料として注目され、例えはモ
ータ、タイマー、スイッチ、リレーなとの用途をはしめ
、通信機器、音響機器、電子・電気機器、自動車、医療
治療分野などにおける用途が期待されている。Conventional technology In recent years, plastic magnets have been developed to retain the magnetic properties of conventional isotropic sintered ferrite magnets, while also offering advantages such as good moldability, high impact strength, and light weight. Because of this, it has attracted attention as a highly functional material, and is used in motors, timers, switches, and relays, and is expected to be used in communications equipment, audio equipment, electronic/electrical equipment, automobiles, and medical treatment fields. ing.
このようなプラスチック磁石は、通常熱可塑性樹脂や熱
硬化性樹脂中に粒子径が１〜５００μｍ程度の磁性粉末
を高充填し、均質に混練して成る組成物を、圧縮成形、
射出成形、押出成形なとの方法によって、所望形状に成
形加工することにより製造される。そして、前記磁性粉
末は、主としてフェライト系と希土類系とに大別される
が、希土類系磁性粉末を用いたプラスチック磁石は、優
れた磁気特性を有することから、現在注目を浴びている
。Such plastic magnets are usually made by compressing, molding, or compressing a composition made by filling a thermoplastic resin or thermosetting resin with a high amount of magnetic powder with a particle size of about 1 to 500 μm and kneading it homogeneously.
It is manufactured by molding into a desired shape using methods such as injection molding and extrusion molding. The magnetic powders are mainly classified into ferrite-based and rare-earth-based magnetic powders, and plastic magnets using rare-earth magnetic powders are currently attracting attention because they have excellent magnetic properties.
しかしながら、該希土類磁性粉末、特に優れた磁気特性
を有することで注目されているＮｄ−Ｆｅ−Ｂ系磁性粉
末は、極めて酸化されやすく、粒径が小さくなるにつれ
てその傾向か著しくなり、特に粒径が５０μｍ以下のも
のは、樹脂との混練時における加熱や空気中の水分など
によって容易に酸化されるため、磁気特性の劣化を免れ
ない上、プラスチック磁石作成後においても表面か錆び
やすいという欠点を有している。However, rare earth magnetic powders, especially Nd-Fe-B magnetic powders, which are attracting attention for their excellent magnetic properties, are extremely susceptible to oxidation, and this tendency becomes more pronounced as the particle size becomes smaller. Plastic magnets with a diameter of less than 50 μm are easily oxidized by heat during kneading with resin or by moisture in the air, resulting in deterioration of magnetic properties and the disadvantage that the surface is susceptible to rust even after plastic magnets are made. have.
したがって、このような欠点を改良するために、例えば
Ｎｄ−Ｆｅ−Ｅ系磁性粉末をリン化合物で表面処理する
方法（特開昭６０−２４０１０５号公報）、シラン系有
機金属化合物とチタネート系有機金属化合物とを、表面
に複合的にコーティングする方法（特開平１−１６１８
０３号公報）などが提案されている。Therefore, in order to improve such defects, for example, a method of surface treating Nd-Fe-E magnetic powder with a phosphorus compound (Japanese Unexamined Patent Publication No. 60-240105), a method of surface treating Nd-Fe-E magnetic powder with a phosphorus compound, a method of treating the surface of Nd-Fe-E magnetic powder with a phosphorus compound, a method of treating the surface of Nd-Fe-E magnetic powder with a phosphorus compound, a method of treating the surface of Nd-Fe-E magnetic powder with a phosphorus compound, a method of treating the surface of Nd-Fe-E magnetic powder with a phosphorus compound, etc. A method of compositely coating a surface with a compound (Japanese Patent Application Laid-Open No. 1-1618
03 Publication) etc. have been proposed.
しかしなから、これらの方法は、ある程度酸化を抑制し
うるものの、高湿の厳しい環境下では酸化防止効果は不
十分であるなと、必ずしも満足しうる方法とはいえない
。However, although these methods can suppress oxidation to some extent, they are not necessarily satisfactory methods, as the oxidation prevention effect is insufficient in a harsh environment of high humidity.
発明か解決しようとする課題
本発明は、このような事情のもとで、高湿の厳しい環境
下でも酸化されにくく、安定した磁気特性を有するプラ
スチック磁石を与えうるＮｄ −Ｆｅ −Ｂ系プラスチ
ック磁石組成物を提供することを目的としてなされたも
のである。SUMMARY OF THE INVENTION Under these circumstances, the present invention provides a Nd-Fe-B plastic magnet that is resistant to oxidation and has stable magnetic properties even in a harsh high-humidity environment. It was made for the purpose of providing a composition.
課題を解決するだめの手段
本発明者らは、前記の好ましい性質を有するＮｄ−Ｆｅ
−Ｂ系プラスチック磁石組成物を開発すべく鋭意研究を
重ねた結果、磁性粉末として、シラン・チタネート系ポ
リマーから形成されるＳｉＯ２−ＴｉＯ□系酸化物及び
金属アルコキシドから形成される金属酸化物により複合
的に表面被覆されたＮｄ−Ｆｅ−Ｂ系磁性粉末を用いる
ことにより、その目的を達成しうろことを見い出し、こ
の知見に基づいて本発明を完成するに至った。Means for Solving the Problems The present inventors have developed Nd-Fe having the above-mentioned preferable properties.
- As a result of intensive research to develop a B-based plastic magnet composition, we have found that magnetic powder is made of a composite of SiO2-TiO□-based oxide formed from silane titanate-based polymer and metal oxide formed from metal alkoxide. The inventors have discovered that the objective can be achieved by using Nd-Fe-B magnetic powder whose surface is coated, and based on this knowledge, the present invention has been completed.
すなわち、本発明は、（Ａ）有機バインダーと、（Ｂ
）Ｎｄ −Ｆｅ−Ｂ系磁性粉末とを含有して成るプラス
チック磁石組成物において、該Ｎｄ−Ｆｅ−Ｂ系磁性粉
末としてシラン・チタネート系ポリマー及び金属アルコ
キシドで複合的に被覆したのち、熱処理したものを用い
たことを特徴とするプラスチック磁石組成物を提供する
ものである。That is, the present invention comprises (A) an organic binder and (B
) Nd-Fe-B magnetic powder, which is compositely coated with a silane titanate polymer and a metal alkoxide and then heat treated. The present invention provides a plastic magnet composition characterized by using the following.
以下、本発明の詳細な説明する。The present invention will be explained in detail below.
本発明組成物における（Ａ）成分の有機バインダーにつ
いては特Ｉこ制限はなく、従来プラスチック磁石に慣用
されているものを用いることかできる。There are no particular limitations on the organic binder as component (A) in the composition of the present invention, and those conventionally used in plastic magnets can be used.
このようなものとしては、例えばエポキシ樹脂やポリウ
レタンなとの熱硬化性樹脂、ポリエチレン、ポリ塩化ビ
ニル、ポリアミドなとの熱可塑性樹脂が挙げられる。こ
れらの有機バインダーは１種用いてもよいし、２種以上
を組み合わせて用いてもよい。Examples of such materials include thermosetting resins such as epoxy resins and polyurethane, and thermoplastic resins such as polyethylene, polyvinyl chloride, and polyamide. These organic binders may be used alone or in combination of two or more.
本発明組成物においては、（Ｂ）成分の磁性粉末として
、シラン・チタネート系ポリマーを熱処理して得られる
５Ｉ０２− ＴｌＯ２系酸化物と金属アルコキシドの加
水分解物を熱処理して得られる非晶質金属酸化物によっ
て複合的に被覆処理されたＮｄ−Ｆｅ−Ｂ系磁性粉末を
用いることが必要である。In the composition of the present invention, as the magnetic powder of component (B), an amorphous metal obtained by heat-treating a hydrolyzate of a 5I02-TlO2-based oxide and a metal alkoxide obtained by heat-treating a silane titanate-based polymer is used. It is necessary to use Nd-Fe-B magnetic powder that has been compositely coated with an oxide.
このように、複合的に被覆処理することにより、Ｎｄ−
Ｆｅ−Ｂ系磁性粉末表面には、５１０２− ＴｉＯ２系
酸化物と非晶質金属酸化物が二層状態で形成されること
になり、ピンホールのない被覆層を形成することかでき
る。該Ｎｄ−Ｆｅ−Ｂ系磁性粉末については特に制限は
なく、プラスチック磁石に磁性粉末として使用される公
知のものを用いることができる。また、該Ｎｄ−Ｆｅ−
Ｂ系磁性粉末としては、通常粒子径が１〜５００μｍの
範囲にあるものが用いられる。In this way, by performing multiple coating treatments, Nd-
The 5102-TiO2-based oxide and the amorphous metal oxide are formed in a two-layer state on the surface of the Fe-B-based magnetic powder, making it possible to form a pinhole-free coating layer. There are no particular limitations on the Nd-Fe-B magnetic powder, and any publicly known magnetic powder used in plastic magnets can be used. Moreover, the Nd-Fe-
As the B-based magnetic powder, one having a particle size in the range of 1 to 500 μm is usually used.
このＮｄ−Ｆｅ−Ｂ系磁性粉末の表面処理に用いられる
５ｉ０２− ＴｉＯ□系酸化物形成に使用されるシラン
・チタネート系ポリマーは、ヒニルトリス（２−メトキ
ノエトキン）７ラン、γ−グリ／ドキ／プロピルトリメ
トキ／シラン、γ−（２−アミノエチル）アミノフロピ
ルトリメトキン７ラン、γ−クロロプロピルトリメトキ
ン／ラン、γ−メルカプトブロピルトリメトキソンラン
、γ−アミツブ０ピルトリエトキ／ノランなとのＶラン
化合物とテトライソフロビルチタネート、テトラ−ｎ−
ブチルチタネート、テトラ−２−エチルへキ／ルチタ不
ト、テトラステアリルチタネート、チタンアシレート化
合物、チタンアセチルアセトネート、オクチレングリコ
ールチタ不一ト、トリエタノールアミンチタネートなど
の有機チタネートから得られるポリマーであり、セラミ
ックコーティング剤ＴＳ−１００又はｒｓ−５００［い
ずれも（株）日板研究新製〕として市販されている。ま
た、非晶質金属酸化物は、金属アルコキシドから次式に
従って生成するものである。The silane/titanate polymer used to form the 5i02-TiO□ oxide used in the surface treatment of this Nd-Fe-B magnetic powder is hinyltris (2-methochinoethquine) 7rane, γ-gly/doki/propyl Trimethoxy/silane, γ-(2-aminoethyl)aminofuropyl trimethoxy 7ran, γ-chloropropyltrimethoxy/silane, γ-mercaptopropyltrimethoxone silane, γ-aminopropyltrimethoxy/silane, V Ran compound and tetraisoflovir titanate, tetra-n-
Polymers obtained from organic titanates such as butyl titanate, tetra-2-ethyl hexyl/rutitanate, tetrastearyl titanate, titanium acylate compounds, titanium acetylacetonate, octylene glycol titanate, triethanolamine titanate, etc. It is commercially available as a ceramic coating agent TS-100 or RS-500 [both manufactured by Nichiban Kenkyushin Co., Ltd.]. Further, an amorphous metal oxide is produced from a metal alkoxide according to the following formula.
Ｍ（ＯＲ）ｎ ＋ｎＨ２０−Ｍ（ＯＨ）ｎ ＋ｎＲＯＨ
Ｍ（ＯＨ）ｎ−ＭＯ，７ｚ ＋ −／２Ｈ２０（ただし
、ＭはＳｌ、Ｚｒ、 Ｔｉ、Ａｏなどの金属原子、Ｒは
アルキル基、ｎはＭの原子価に相当する数である）
該ＭＯ，，□においては、金属成分は１程合まれていて
もよいし、２種以上含まれていてもよく、例えば、５ｉ
ｏ２． ＴｉＯ２，ＡＱ２０３． Ｆｅ、Ｏ，、Ｃｒ２
Ｏ，、５ｉＺｒＯ，。M(OR)n +nH20-M(OH)n +nROH
M(OH)n-MO,7z + -/2H20 (M is a metal atom such as Sl, Zr, Ti, Ao, etc., R is an alkyl group, n is a number corresponding to the valence of M) the MO ,, □, one or more metal components may be combined, or two or more metal components may be included.
o2. TiO2, AQ203. Fe, O, Cr2
O,,5iZrO,.
Ｚｎ２５ｉＯａ、 Ａｌ２２ＳｉＯｓ、 Ｋ２ＳｉＯ３
，Ｃａ２５ｉＯ，、Ｆｅ２５ｉＯ，などが挙げられる。Zn25iOa, Al22SiOs, K2SiO3
, Ca25iO, , Fe25iO, and the like.
これらの使用量は、いずれも該Ｎｄ−Ｆｅ−Ｂ系磁性粉
末１００重量部当り、通常０．１〜２０重量部の範囲で
選ばれる。この量が０．１重量部未満では酸化防止効果
が十分に発揮されないし、２０重量部を超えると該磁性
粒子の表面にコーティングされる被覆層が厚くなりすぎ
て、磁気特性が低下する傾向がみられる。The amount of each of these to be used is usually selected within the range of 0.1 to 20 parts by weight per 100 parts by weight of the Nd-Fe-B magnetic powder. If this amount is less than 0.1 parts by weight, the antioxidant effect will not be sufficiently exhibited, and if it exceeds 20 parts by weight, the coating layer coated on the surface of the magnetic particles will become too thick, and the magnetic properties will tend to deteriorate. Be looked at.
Ｎｄ−Ｆｅ−Ｂ系磁性粉末の被覆処理を行うには、まず
、適当な溶媒、例えばキシレン、トルエン、ミネラルス
ピリットなとに、シラン・チタネート系ポリマーを加え
て適当な濃度の表面処理液を調製し、この溶液と該Ｎ、
ｄ−Ｆｅ−Ｂ系磁性粉末とを接触させたのち、乾燥し、
さらに、この上に適当な溶媒、例えばメタノール、エタ
ノール、イソプロパツールなどのアルコール系溶媒など
に金属アルコキシドを加えて適当な濃度に調整した表面
処理溶液を被覆し、次いで、１５０〜３００°Ｃの温度
で熱処理する。To coat Nd-Fe-B magnetic powder, first, add a silane/titanate polymer to an appropriate solvent such as xylene, toluene, or mineral spirit to prepare a surface treatment solution with an appropriate concentration. This solution and the N,
After contacting with d-Fe-B magnetic powder, drying,
Furthermore, a surface treatment solution prepared by adding a metal alkoxide to an appropriate solvent such as an alcoholic solvent such as methanol, ethanol, or isopropanol, and adjusting the concentration to an appropriate level is coated on top of the surface treatment solution, and then heated at 150 to 300°C. Heat treated at temperature.
このようにして、被覆処理されたＮｄ−Ｆｅ−Ｂ基磁性
粒子の被覆層の厚さは、５ｉｎ２− Ｔｉｅ２系酸化物
から成る被覆層及び非晶質金属酸化物から成る被覆層と
もに１〜２０μｍの範囲にあるのか望ましい。In this way, the thickness of the coating layer of the coated Nd-Fe-B-based magnetic particles is 1 to 20 μm for both the coating layer made of 5in2-Tie2 system oxide and the coating layer made of amorphous metal oxide. It is desirable that it be within the range of .
この厚さが１μｍ未満では酸化防止効果が十分に発揮さ
れないし、２０μｍを超えると磁気特性か低下する傾向
かみられる。If the thickness is less than 1 μm, the antioxidant effect will not be sufficiently exhibited, and if it exceeds 20 μm, the magnetic properties tend to deteriorate.
本発明組成物においては、（Ａ）成分の有機バインダー
と（Ｂ）成分の磁性粉末との使用割合は、成形方法によ
っても異なるが、通常重量比ｌ：９９ないし１０ ：
９０の範囲で選ばれる。該（Ｂ）成分の磁性粉末との使
用量が、有機バインダーと磁性粉末との合計重量に基づ
き９０重量％未満では磁気特性が十分に発揮されず、材
料として高価な希土類系磁性粉末を使用する利点が得ら
れないし、９９重量％を超えるとプラスチック磁石の特
徴である耐衝撃性や引張り強度などの機械的特性が低下
するので、好ましくない。In the composition of the present invention, the ratio of the organic binder as component (A) and the magnetic powder as component (B) varies depending on the molding method, but is usually in a weight ratio of 1:99 to 10:1.
Selected from a range of 90. If the amount of component (B) used in the magnetic powder is less than 90% by weight based on the total weight of the organic binder and magnetic powder, the magnetic properties will not be sufficiently exhibited, and expensive rare earth magnetic powder will be used as the material. No advantage can be obtained, and if it exceeds 99% by weight, mechanical properties such as impact resistance and tensile strength, which are characteristics of plastic magnets, will deteriorate, which is not preferable.
本発明のプラスチック磁石組成物には、所望に応し各種
添加剤、例えば滑剤、着色剤、安定剤、酸化防止剤、可
塑剤などを添加することができる。Various additives such as lubricants, colorants, stabilizers, antioxidants, plasticizers, etc. can be added to the plastic magnet composition of the present invention as desired.
本発明のプラスチック磁石組成物は、例えば（Ａ）成分
の有機バインダーと（Ｂ）成分の磁性粉末と所望に応じ
て用いられる各種添加剤とをそれぞれ所定の割合で溶融
混練することにより、調製することかできる。混練装置
については特に制限はなく、例えばヘン／エルミキサー
、単軸又は二軸押出機、バンバリーミキサ−、ロールな
どが用いられる。The plastic magnet composition of the present invention is prepared, for example, by melt-kneading the organic binder as component (A), the magnetic powder as component (B), and various additives used as desired in predetermined ratios. I can do it. There are no particular restrictions on the kneading device, and for example, a Hen/El mixer, a single screw or twin screw extruder, a Banbury mixer, a roll, etc. can be used.
このようにして調製された本発明のＮｄ−Ｆｅ−Ｂ系プ
ラスチック磁石組成物は、例えは圧縮成形、射出成形、
押出成形なとにより、所望形状に成形加工することによ
り、極めて酸化されにくく、安定した磁気特性を有する
Ｎｄ−Ｆｅ−Ｂ系プラスチック磁石を与えることかでき
る。The Nd-Fe-B plastic magnet composition of the present invention prepared in this way can be processed by, for example, compression molding, injection molding,
By molding into a desired shape by extrusion molding, it is possible to provide a Nd-Fe-B plastic magnet that is extremely resistant to oxidation and has stable magnetic properties.
本発明においては、このようにして得られた成形品をさ
らに前記と同様にして７ラン・チタ不ト系ポリマーと金
属アルコキシドで処理し、表面被覆することにより、よ
り一層効果を高めることができる。In the present invention, the effect can be further enhanced by further treating the thus obtained molded article with a 7-run titanium-based polymer and metal alkoxide in the same manner as described above and coating the surface. .
発明の効果
本発明によると、磁性粉末として、ピンホールのない被
覆層を有するものか用いられているため、高湿の厳しい
環境下でも極めて酸化されにくく、安定しｔ：磁気特性
を有するとともに、有機バインダーと磁性粉末との密着
性に優れたプラスチック磁石を与えうるＮｄ−Ｆｅ−Ｂ
系プラスチック磁石組成物が提供される。Effects of the Invention According to the present invention, since a magnetic powder having a pinhole-free coating layer is used, it is extremely resistant to oxidation even in a harsh environment of high humidity and has stable magnetic properties. Nd-Fe-B can provide a plastic magnet with excellent adhesion between organic binder and magnetic powder
A plastic magnet composition is provided.
実施例
次に、実施例により本発明をさらに詳細に説明するが、
本発明はこれらの例によってなんら限定されるものでは
ない。Examples Next, the present invention will be explained in more detail with reference to examples.
The present invention is not limited in any way by these examples.
実施例１
シラン・チタネート系ポリマー〔（株）日板研究新製Ｔ
Ｓ−１００１５ｇをキシレン９５ｇで希釈した溶液に、
Ｎｄ−Ｆｅ−Ｂ系磁性粉末（ＧＭ社製ＮＯＰ −Ｂ、
４０メソシュ以上の粒度のものの含有置引１重量％以下
、３２５メツシユ以下の粒度のものの含有量１５重量％
以下）１００９を浸せきし、５分間かきまぜたのち、磁
性粉末をろ別し、４０°Ｃ雰囲気中で絶えず振動させな
がら乾燥を行い、表面処理されたＮｄ −Ｆｅ −Ｂ系
磁性粉末を得た。Example 1 Silane/titanate polymer [T manufactured by Nichiban Research Co., Ltd.
In a solution of 15g of S-100 diluted with 95g of xylene,
Nd-Fe-B magnetic powder (GM NOP-B,
The content of particles with a particle size of 40 mesh or more is 1% by weight or less, and the content of particles with a particle size of 325 mesh or less is 15% by weight.
1009 (below) was soaked and stirred for 5 minutes, the magnetic powder was filtered and dried in an atmosphere of 40° C. with constant vibration to obtain a surface-treated Nd-Fe-B magnetic powder.
次に、金属アルコキシド〔（株）日板研究新製Ｇ−３０
１）２０ｇをイソプロピルアルコール８ｈで希釈調製し
た溶液に上記表面処理されたＮｄ−Ｆｅ−Ｂ系磁性粉末
１０ｈを浸せきし、５分間かきまぜたのち磁性粉末をろ
別し、真空雰囲気中２００°Ｃｌ２Ｏ分間乾燥させて被
覆処理されたＮｄ−Ｆｅ−Ｂ系磁性粉末を得に 。Next, metal alkoxide [G-30 manufactured by Nichiban Research Co., Ltd.]
1) 10 hours of the surface-treated Nd-Fe-B magnetic powder was immersed in a solution prepared by diluting 20 g with 8 hours of isopropyl alcohol, stirred for 5 minutes, filtered off the magnetic powder, and diluted with 200° Cl2O in a vacuum atmosphere for 200 minutes. To obtain the dried and coated Nd-Fe-B magnetic powder.
次に、このようにして被覆処理された磁性粉末に対し、
−波型エポキシ樹脂［長瀬チバ（株）製ＸＮＲ−４２０
３］ ３重量％を配合して組成物を調製したのち、この
組成物を約５．６ｔ／ｃｍ２の圧力で径１５ｍｍ、高さ
１０＋ｎｍの円柱状に成形し、次いでこの成形品を常圧
下、１２０°Ｃで２時間硬化させて、プラスチック磁石
を作成した。Next, for the magnetic powder coated in this way,
- Wave-shaped epoxy resin [XNR-420 manufactured by Nagase Ciba Co., Ltd.
3] After preparing a composition by blending 3% by weight, this composition was molded into a cylindrical shape with a diameter of 15 mm and a height of 10+ nm at a pressure of about 5.6 t/cm2, and then this molded product was molded under normal pressure. A plastic magnet was produced by curing at 120°C for 2 hours.
このプラスチック磁石を６０°Ｃ１９５％ＲＨの雰囲気
中に保存させた場合の錆の発生状況を経時的に調べた。When this plastic magnet was stored in an atmosphere at 60° C. and 195% RH, the occurrence of rust was examined over time.
その結果を表に示す。The results are shown in the table.
実施例２
実施例１と同様にして作製した成形品を前出のＴＳ−１
００の希釈液に浸せきし、取り出して乾燥後、さらに、
前出のＧ−３０１の希釈液に浸せきし、取り出して真空
雰囲気中２００°Ｃｌ２Ｏ分間乾燥させて成形品表面に
コーティング層を設けたプラスチック磁石を作成した。Example 2 A molded product produced in the same manner as in Example 1 was used as the above-mentioned TS-1.
00 diluted solution, taken out and dried, and further
A plastic magnet with a coating layer on the surface of the molded product was prepared by immersing it in the diluted solution of G-301, taking it out, and drying it in a vacuum atmosphere at 200°CCl2O for minutes.
このプラスチック磁石について、実施例Ｉと同様に錆の
発生状況を調べた。その結果を表に示す。Regarding this plastic magnet, the occurrence of rust was investigated in the same manner as in Example I. The results are shown in the table.
比較例
実施例１において、磁性粉末の表面処理を行わなかった
こと以外は、実施例１と同様にしてプラスチック磁石を
作成し、錆の発生状況を調べた。Comparative Example A plastic magnet was prepared in the same manner as in Example 1, except that the surface treatment of the magnetic powder was not performed, and the occurrence of rust was examined.
その結果を表に示す。The results are shown in the table.
〔注〕○：錆が発生していない
△、錆が一部発生している
Ｘ：錆が全面に発生している
（目視判定による）
該表から本発明のプラスチック磁石は極めて錆ヒｔこく
く、産業上有用であることが分る・特許出願人 信越
ポリマー株式会社[Note] ○: No rust △, some rust has occurred・Patent applicant: Shin-Etsu Polymer Co., Ltd.
Claims (1)
磁性粉末とを含有して成るプラスチック磁石組成物にお
いて、該Ｎｄ−Ｆｅ−Ｂ系磁性粉末としてシラン・チタ
ネート系ポリマー及び金属アルコキシドで複合的に被覆
したのち、熱処理したものを用いたことを特徴とするプ
ラスチック磁石組成物。1. In a plastic magnet composition comprising (A) an organic binder and (B) an Nd-Fe-B magnetic powder, the Nd-Fe-B magnetic powder is a silane titanate polymer and a metal alkoxide. A plastic magnet composition characterized by using a compound coated and then heat treated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2132638A JPH0429302A (en) | 1990-05-24 | 1990-05-24 | Nd-fe-b plastic magnetic composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2132638A JPH0429302A (en) | 1990-05-24 | 1990-05-24 | Nd-fe-b plastic magnetic composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0429302A true JPH0429302A (en) | 1992-01-31 |
Family
ID=15086011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2132638A Pending JPH0429302A (en) | 1990-05-24 | 1990-05-24 | Nd-fe-b plastic magnetic composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0429302A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007331080A (en) * | 2006-06-16 | 2007-12-27 | Masato Ishii | Collet chuck |
| CN112692276A (en) * | 2020-12-09 | 2021-04-23 | 武汉科技大学 | Iron-based antioxidant magnetic composite powder and preparation method thereof |
-
1990
- 1990-05-24 JP JP2132638A patent/JPH0429302A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007331080A (en) * | 2006-06-16 | 2007-12-27 | Masato Ishii | Collet chuck |
| CN112692276A (en) * | 2020-12-09 | 2021-04-23 | 武汉科技大学 | Iron-based antioxidant magnetic composite powder and preparation method thereof |
| CN112692276B (en) * | 2020-12-09 | 2024-03-08 | 武汉科技大学 | Iron-based antioxidant magnetic composite powder and preparation method thereof |
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