JPH05109516A - Composition for formation of bonded magnet, and bonded magnet - Google Patents
Composition for formation of bonded magnet, and bonded magnetInfo
- Publication number
- JPH05109516A JPH05109516A JP3270884A JP27088491A JPH05109516A JP H05109516 A JPH05109516 A JP H05109516A JP 3270884 A JP3270884 A JP 3270884A JP 27088491 A JP27088491 A JP 27088491A JP H05109516 A JPH05109516 A JP H05109516A
- Authority
- JP
- Japan
- Prior art keywords
- composition
- molding
- bonded magnet
- hydrazine compound
- magnetic properties
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/10—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 non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure
- H01F1/11—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 non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles
- H01F1/113—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 non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles in a bonding agent
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/06—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder
- H01F1/08—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together
- H01F1/083—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together in a bonding agent
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Hard Magnetic Materials (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、磁石を作るための組成
物並びに該組成物を原料として成形して得た磁石に関す
るものである。更に詳しくは、磁気特性に優れ、成形加
工性が良く更に成形加工時の熱安定性に優れたボンド磁
石成形用組成物並びに該組成物を原料として成形して得
たボンド磁石に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composition for producing a magnet and a magnet obtained by molding the composition as a raw material. More specifically, it relates to a bond magnet molding composition having excellent magnetic properties, good moldability, and excellent thermal stability during molding, and a bond magnet obtained by molding the composition as a raw material.
【０００２】[0002]
【従来の技術】熱可塑性樹脂からなる有機ポリマー材料
と磁性材料とからなる組成物から作られたポンド磁石は
良く知られている。この種のポンド磁石成形用組成物
は、形状の複雑な製品を後加工なしにプラスチック成形
機（例えば射出成形機、押出成形機、または圧縮成形
機）で成形されるため、近年種々の用途のボンド磁石成
形用に用いられてきている。また電子製品用、プリンタ
ー、その他の電化製品、自動車部品等の小型化、軽量化
の要求から、ボンド磁石の高性能化が強く望まれてお
り、そのためには、成形加工性を保持したまま、磁性材
料の添加量を増加させることが必要となる。2. Description of the Related Art Pond magnets made of a composition of an organic polymer material made of a thermoplastic resin and a magnetic material are well known. This type of pond magnet molding composition is molded in a plastic molding machine (for example, an injection molding machine, an extrusion molding machine, or a compression molding machine) without post-processing for a product having a complicated shape, and thus has been used in various applications in recent years. It has been used for forming bonded magnets. Further, due to the demand for miniaturization and weight reduction of electronic products, printers, other electric appliances, automobile parts, etc., there is a strong demand for higher performance of bonded magnets. For that purpose, while maintaining moldability, It is necessary to increase the amount of magnetic material added.
【０００３】例えば、特開昭６２−１２３７０２号公報
には、カップリング剤で表面処理した磁性粉末と合成樹
脂からなる組成物が記載されている。また特開昭６３−
１８１４０３号公報には、共重合体の使用、特開平２−
６５１０３号公報には、添加剤の使用などが開示され、
該組成物の磁気特性の向上、加工性能、例えば流動性の
改善などが試みられているが、磁気特性を保持したまま
で、熱安定性、流動性の保持及び成形品に強い機械強度
を付与する性質を合わせ持った磁性材料の添加量が体積
分率で６５％以上（組成物を構成する物質によるが、重
量％で表すとおおよそ９３％程度以上）の組成物はなか
った。For example, Japanese Patent Laid-Open No. 62-123702 describes a composition comprising magnetic powder surface-treated with a coupling agent and a synthetic resin. In addition, JP-A-63-
No. 181403, the use of a copolymer, JP-A-2-
Japanese Patent No. 65103 discloses the use of additives and the like,
Attempts have been made to improve the magnetic properties of the composition and processability, for example, to improve the fluidity. However, while maintaining the magnetic properties, thermal stability, retention of fluidity, and imparting strong mechanical strength to molded products are provided. There was no composition having a volume fraction of 65% or more (depending on the substance constituting the composition, approximately 93% or more in terms of weight%) of the magnetic material having the above properties.
【０００４】[0004]
【発明が解決しようとする問題点】本発明は、磁性材料
を高密度充填して磁気特性を高める一方、流動性の低
下、熱安定性の低下、成形後の機械特性の低下等の問題
点のない、射出及び／または押出成形によつて、特に高
磁気特性の薄肉成形ボンド磁石に成形可能なボンド磁石
成形用組成物を提供することにある。DISCLOSURE OF INVENTION Problems to be Solved by the Invention The present invention has a problem in that, while high density packing of a magnetic material is performed to enhance magnetic properties, fluidity is lowered, thermal stability is lowered, and mechanical properties after molding are lowered. It is an object of the present invention to provide a bonded magnet molding composition which can be molded into a thin-walled molded magnet having particularly high magnetic properties by injection molding and / or extrusion molding.
【０００５】[0005]
【問題点を解決するための手段】本発明者等は、従来技
術の問題点を解決すべく鋭意研究した結果、ポリアミド
系樹脂及び磁性材料粒子からなるボンド磁石成形用組成
物に更に、ヒンダードフェノール構造を有するヒドラジ
ン化合物を上記組成物中に占める割合が０．３〜２．０
重量％、好ましくは０．７〜１．５重量％になるように
添加することにより、成形加工時の流動性、熱安定性並
びに成形後の機械特性を著しく向上させることができる
ことを見出し、更に磁性材料を体積分率で６５％以上の
高密度に配合可能となるため高磁気特性を有するボンド
磁石成形用組成物が得られることが判明した。また本発
明において使用するポリアミド系樹脂にポリアミド共重
合体を１〜７０重量％、好ましくは２０〜５０重量％添
加することにより、押出成形性のいっそう優れた高い磁
気特性を有するボンド磁石成形用組成物が得られること
を見い出し、本発明を完成した。As a result of intensive studies to solve the problems of the prior art, the inventors of the present invention have found that a bonded magnet molding composition comprising a polyamide resin and magnetic material particles is further hindered. The ratio of the hydrazine compound having a phenol structure in the composition is 0.3 to 2.0.
It has been found that the fluidity at the time of molding, thermal stability, and mechanical properties after molding can be remarkably improved by adding it in an amount of 0.7% by weight, preferably 0.7 to 1.5% by weight. It has been found that a composition for forming a bonded magnet having high magnetic properties can be obtained because a magnetic material can be compounded at a high density of 65% or more in volume fraction. Further, by adding a polyamide copolymer in an amount of 1 to 70% by weight, preferably 20 to 50% by weight, to the polyamide-based resin used in the present invention, a composition for forming a bonded magnet having higher magnetic properties with more excellent extrusion moldability. It was found that the product was obtained, and the present invention was completed.
【０００６】ボンド磁石成形用組成物に添加するヒンダ
ードフェノール構造を有する二価フェノールのヒドラジ
ン化合物による流動性の向上の機序は明らかではない
が、ヒンダードフェノール構造を有する二価フェノール
のヒドラジン化合物自身の抗酸化作用の他に、高温、高
剪断力下でメカノケミカル反応、即ちアミド置換反応を
引き起こし、マトリックス樹脂の分子量を低下させ、該
組成物の流動性を向上させ、成形加工性が改善され、更
に磁性材料の高密度充填化が可能となり、磁気特性を高
めることができることによるものと考えられる。また、
ポリアミド系樹脂としてポリアミド共重合体を含むもの
を用いると、ポリアミド共重合体は、ポリアミドホモポ
リマーに比べて結晶化度が低くかつ結晶化時間が長いの
で、このボンド磁石成形用組成物は、射出成形で加工す
る場合には、金型内での固化時間が長時間となるため、
加工時の流動性が向上し、押出成形で加工する場合は、
ダイ出口での固化時間が長く、ダイ先端での圧力上昇を
抑えることができ、スクリューに対する負荷も軽減でき
る。更に磁性材料を高密度充填したボンド磁石成形用組
成物を用いても十分成形が可能となることによるものと
考えられる。従って、本発明のボンド磁石成形用組成物
によれば、磁気特性の優れたボンド磁石が得られる。The mechanism for improving the fluidity of the dihydric phenol hydrazine compound having a hindered phenol structure added to the composition for forming a bonded magnet is not clear, but the hydrazine compound of a dihydric phenol having a hindered phenol structure is not clear. In addition to its own antioxidant effect, it causes a mechanochemical reaction under high temperature and high shearing force, that is, an amide substitution reaction, lowers the molecular weight of the matrix resin, improves the fluidity of the composition, and improves the molding processability. It is considered that the high density packing of the magnetic material becomes possible and the magnetic characteristics can be improved. Also,
When a polyamide-based resin containing a polyamide copolymer is used, the polyamide copolymer has a lower crystallinity and a longer crystallization time than the polyamide homopolymer. When processing by molding, the solidification time in the mold is long, so
The fluidity during processing improves, and when processing by extrusion molding,
The solidification time at the die outlet is long, the pressure rise at the die tip can be suppressed, and the load on the screw can be reduced. Further, it is considered that the composition can be sufficiently molded even by using the composition for molding the bonded magnet in which the magnetic material is densely packed. Therefore, according to the composition for molding a bonded magnet of the present invention, a bonded magnet having excellent magnetic properties can be obtained.
【０００７】本発明で用いられるポリアミド系樹脂とし
ては、例えば６−ナイロン、６，６−ナイロン、１２ナ
イロン等を挙げることができるが、これらに限定される
ものではない。Examples of the polyamide resin used in the present invention include, but are not limited to, 6-nylon, 6,6-nylon, 12 nylon and the like.
【０００８】本発明で用いられるポリアミド共重合体と
は、６−ナイロンと１２−ナイロン、６−ナイロンと
６，６−ナイロン等の異なるポリアミド系樹脂の共重合
体である。The polyamide copolymer used in the present invention is a copolymer of different polyamide resins such as 6-nylon and 12-nylon, 6-nylon and 6,6-nylon.
【０００９】本発明で用いられるヒンダードフェノール
構造を有する二価フェノールのヒドラジン化合物の添加
量は、０．３〜２．０重量％である。添加量がこの範囲
より少ないと、好ましい熱安定性、成形加工性が得られ
ない。一方大きいと、好ましい磁気特性が得られない。The amount of the dihydric phenol hydrazine compound having a hindered phenol structure used in the present invention is 0.3 to 2.0% by weight. If the amount added is less than this range, preferable thermal stability and moldability cannot be obtained. On the other hand, if it is large, preferable magnetic properties cannot be obtained.
【００１０】ヒンダードフェノール構造を有する二価フ
ェノールのヒドラジン化合物としては、例えば、下記の
化学式１で示されるイルガノックスＭＤ１０２４（チバ
ガイギー製）あるいは化学式２、化学式３等で示される
Ｎ，Ｎ′−ビス〔３−（３，５−ジ−ｔ−ブチル−４−
ヒドロキシフェニル）アルカノイル〕ヒドラジン類を挙
げることができる。Examples of the hydrazine compound of a dihydric phenol having a hindered phenol structure include Irganox MD1024 (manufactured by Ciba Geigy) represented by the following chemical formula 1 or N, N'-bis represented by the chemical formulas 2 and 3 [3- (3,5-di-t-butyl-4-
Hydroxyphenyl) alkanoyl] hydrazines can be mentioned.
【００１１】[0011]
【化１】 [Chemical 1]
【００１２】[0012]
【化２】 [Chemical 2]
【００１３】[0013]
【化３】 [Chemical 3]
【００１４】また、本発明で用いる磁性材料とは、磁性
あるいは磁化可能な材料を意味する。従って、磁性材料
はそれ自身磁化されていなくても、磁石を製造するに際
し、または製造後に磁場を印加して磁化できるものであ
れば良い。The magnetic material used in the present invention means a magnetic or magnetizable material. Therefore, even if the magnetic material is not magnetized by itself, it may be any material that can be magnetized by applying a magnetic field during or after manufacturing the magnet.
【００１５】磁性材料の例としては、例えば、特開平１
−１６２３０１号公報に記載されているバリウムフェラ
イト（ＢａＯ・６Ｆｅ2 Ｏ3）やストロンチウムフェラ
イト（ＳｒＯ・６Ｆｅ2 Ｏ3）といったフェライト材
料、高磁気特性を有するボンド磁石用の希土類金属（Ｓ
ｍ、Ｃｅ、Ｌａ、Ｙ、Ｎｄ、Ｐｒ、Ｇｄ）と遷移金属
（Ｆｅ、Ｃｏ、Ｎｉ、Ｚｒ、Ｈｆ、Ｃｕ、Ｔｉ）との金
属間化合物、あるいはネオジウム・鉄・ボロン（Ｎｄ−
Ｆｅ−Ｂ）をベ−スとした少なくとも一つの希土類金属
と少なくとも一つの遷移金属とからなる金属間化合物等
を挙げることができる。これらの中でもネオジウム・鉄
・ボロンからなる磁性材料は、特に本発明に好適に使用
することができる。An example of the magnetic material is, for example, JP-A-1
Barium ferrite which is described in -162,301 JP (BaO · 6Fe 2 O 3) or strontium ferrite (SrO · 6Fe 2 O 3) such as ferrite material, a rare earth metal (S for bonded magnets having high magnetic properties
m, Ce, La, Y, Nd, Pr, Gd) and an intermetallic compound of a transition metal (Fe, Co, Ni, Zr, Hf, Cu, Ti), or neodymium / iron / boron (Nd-
An intermetallic compound including at least one rare earth metal based on Fe-B) and at least one transition metal can be used. Among these, a magnetic material composed of neodymium, iron, and boron can be particularly preferably used in the present invention.
【００１６】本発明においては、通常良く使われる成形
加工助剤である滑剤、潤滑油等を添加しても良い。滑剤
としてはステアリン酸、ステアリン酸塩、脂肪酸アミ
ド、ワックス等を挙げられ、潤滑油としては、シリコー
ンオイル等が挙げられる。これらの成形加工助剤は磁性
材料とマトリックス樹脂の混合物に対して０．０５〜
０．５重量％程度が望ましい。In the present invention, lubricants, lubricating oils and the like, which are commonly used molding aids, may be added. Examples of lubricants include stearic acid, stearates, fatty acid amides and waxes, and examples of lubricating oils include silicone oils. These molding processing aids are added to the mixture of magnetic material and matrix resin in an amount of 0.05 to
About 0.5% by weight is desirable.
【００１７】本発明のボンド磁石成形用の原料は、例え
ばマトリックス樹脂の基材として市販の６，６−ナイロ
ンペレットも使用可能であるが、混合、混練の均一性を
考えると、ペレット化前の粉末状のものが好ましい。As the raw material for forming the bonded magnet of the present invention, for example, commercially available 6,6-nylon pellets can be used as the base material of the matrix resin. However, considering the uniformity of mixing and kneading, the pellets before pelletization can be used. A powder form is preferable.
【００１８】[0018]
【実施例】以下に、本発明の実施例を示すが、本発明は
これらに限定されるものではない。EXAMPLES Examples of the present invention will be shown below, but the present invention is not limited thereto.
【００１９】実施例１ ネオジウム・鉄・ボロン粉末（ＧＭ製、ＭＱ−Ｐパウダ
ー）９３．４重量％、１２−ナイロン粉末（宇部興産
製、Ｐ−３０１４Ｕ）５．５重量％、ヒドラジン化合物
（チバガイギー製、イルガノックスＭＤ−１０２４）
１．０重量％をヘンシェルミキサー（三井三池化工機
製、ＦＭ１０Ｂ）に入れ１分間混合した。次いでこの混
合物にシリコーンオイル（バイエル製、ＰＮ−２００）
０．１重量％を加え更に１分間混合した。次ぎに、該混
合物を取り出し、同方向二軸押出機（東芝製、ＴＥＭ−
３５Ｂ）のホッパーに入れ２３０〜２５０℃の温度で混
練し、ペレット状のボンド磁石成形用組成物を作製し
た。本実施例で使用した組成は、表１にまとめてある。Example 1 93.4% by weight of neodymium / iron / boron powder (made by GM, MQ-P powder), 5.5% by weight of 12-nylon powder (made by Ube Industries, P-3014U), hydrazine compound (Ciba Geigy) (Made by Irganox MD-1024)
1.0% by weight was placed in a Henschel mixer (FM10B, manufactured by Mitsui Miike Kakoki) and mixed for 1 minute. Then add silicone oil (PN-200 from Bayer) to this mixture.
0.1 wt% was added and mixed for another 1 minute. Next, the mixture was taken out and the same direction twin-screw extruder (manufactured by Toshiba, TEM-
35B) was put into the hopper and kneaded at a temperature of 230 to 250 ° C. to prepare a pellet-shaped composition for molding a bonded magnet. The compositions used in this example are summarized in Table 1.
【００２０】得られたボンド磁石成形用組成物につき、
熱安定性評価としてラボプラストミルミキサー（東洋精
機製作所製、３０Ｃ−１５０）を用いて２５０℃で混練
し、１０分後のトルク値を１分後のトルク値で除算した
トルク値上昇比で測定した。また、ペレットの粘度をキ
ャピラリーフローメーター（東洋精機製作所製、キャピ
ログラフＰＭ−Ｃ）を用い、２５０℃、１２１６ｓｅｃ
-1の剪断速度で測定し、またバーフローも、射出成形機
（東芝製、ＥＰＮ−８０）を用い、バー溝の形状が幅１
０ｍｍ、深さ１ｍｍのバーフロー金型により、２７０
℃、１４００ｋｇ／ｃｍ2の射出圧力でその流動長を測
定することにより評価した。With respect to the obtained bonded magnet molding composition,
For thermal stability evaluation, kneading was performed at 250 ° C using a Labo Plastmill mixer (30C-150, manufactured by Toyo Seiki Seisakusho), and the torque value after 10 minutes was divided by the torque value after 1 minute. did. Moreover, the viscosity of the pellet was measured at 250 ° C. for 1216 seconds using a capillary flow meter (Capillograph PM-C manufactured by Toyo Seiki Seisaku-sho, Ltd.).
-1 was measured at a shear rate, and the bar flow was also measured using an injection molding machine (TOSHIBA, EPN-80) and the bar groove had a width of 1
270 by bar flow mold with 0mm and 1mm depth
It was evaluated by measuring its flow length at an injection pressure of 1400 kg / cm 2 ° C.
【００２１】また、その射出成形性を射出成形機（東芝
製、ＥＰＮ−８０）を使用して、内径２４ｍｍ、外径２
６ｍｍ、長さ４ｍｍの円筒形状のボンド磁石で○、△、
×で評価した。○は通常の成形条件で成形できたもの、
△は高温高射出圧力でどうにか成形できたもの、×は高
温高射出圧力でも満足に成形できなかったものである。The injection moldability was measured by using an injection molding machine (Toshiba, EPN-80) with an inner diameter of 24 mm and an outer diameter of 2 mm.
6 mm long, 4 mm long cylindrical bonded magnet
It evaluated by x. ○ indicates that molding was possible under normal molding conditions,
Δ indicates that the molding could be managed by the high temperature and high injection pressure, and × indicates that the molding could not be satisfactorily performed by the high temperature and high injection pressure.
【００２２】得られた円筒形状のボンド磁石の磁気特性
（ＢＨ）ｍａｘは、ＢＨトレサーにて測定した。The magnetic characteristic (BH) max of the obtained cylindrical bonded magnet was measured with a BH tracer.
【００２３】結果を、下記の表１に示した。熱安定性、
射出成形性及び磁気特性について実用価値のある高品質
のものであった。The results are shown in Table 1 below. Thermal stability,
It was of high quality with practical value in terms of injection moldability and magnetic properties.
【００２４】実施例２ 表１の実施例２で示す組成を用いて、実施例１と同様の
方法でボンド磁石成形用組成物を作製した。Example 2 Using the composition shown in Example 2 in Table 1, a bond magnet molding composition was prepared in the same manner as in Example 1.
【００２５】得られたボンド磁石成形用組成物につき、
実施例１と同様に評価した。With respect to the obtained bonded magnet molding composition,
Evaluation was performed in the same manner as in Example 1.
【００２６】結果を、表１に示したが、熱安定性、射出
成形性及び磁気特性について実用価値のある高品質のも
のであった。The results are shown in Table 1 and were of high quality with practical value in terms of thermal stability, injection moldability and magnetic properties.
【００２７】比較例１ 表１の比較例１で示す組成を用いて、実施例１と同様の
方法でボンド磁石成形用組成物を作製した。Comparative Example 1 A bond magnet molding composition was prepared in the same manner as in Example 1, using the composition shown in Comparative Example 1 in Table 1.
【００２８】得られたボンド磁石成形用組成物につき、
実施例１と同様に評価した。With respect to the obtained bonded magnet molding composition,
Evaluation was performed in the same manner as in Example 1.
【００２９】結果を、表１に示したが、熱安定性は実施
例に比べて劣り、シリコーンオイルを実施例の１０倍量
使用したが、粘度、バー・フローとも不都合な値を示
し、射出成形することができなかった。従って磁気特性
を測定することができなかった。The results are shown in Table 1. The thermal stability was inferior to that of the examples. Silicone oil was used in an amount 10 times that of the examples. Could not be molded. Therefore, the magnetic characteristics could not be measured.
【００３０】比較例２ 表１の比較例２で示す組成を用いて、実施例１と同様の
方法でボンド磁石成形用組成物を作製した。Comparative Example 2 Using the composition shown in Comparative Example 2 in Table 1, a bonded magnet molding composition was prepared in the same manner as in Example 1.
【００３１】得られたボンド磁石成形用組成物につき、
実施例１と同様に評価した。With respect to the obtained bonded magnet molding composition,
Evaluation was performed in the same manner as in Example 1.
【００３２】結果を、表１に示したが、可塑剤を添加し
たのにも拘らず、熱安定性、粘度、バー・フローとも実
施例に比べて劣り、射出成形は非常に困難であった。The results are shown in Table 1. In spite of the addition of the plasticizer, the thermal stability, the viscosity and the bar flow were inferior to those of the examples, and injection molding was very difficult. ..
【００３３】実施例３ 表２の実施例３で示す組成を用いて、実施例１と同様の
方法でボンド磁石成形用組成物を作製した。Example 3 Using the composition shown in Example 3 of Table 2, a bond magnet molding composition was prepared in the same manner as in Example 1.
【００３４】得られたボンド磁石成形用組成物につき、
実施例１と同様に熱安定性評価としてラボプラストミル
ミキサー（東洋精機製作所製、３０Ｃ−１５０）を用い
て２５０℃で混練し、１０分後のトルク値を１分後のト
ルク値で除算したトルク値上昇比で測定した。また、ペ
レットの粘度をキャピラリーフローメーター（東洋精機
製作所製、キャピログラフＰＭ−Ｃ）を用いて、２５０
℃、１２１６ｓｅｃ-1の剪断速度で測定した。With respect to the obtained bonded magnet molding composition,
As in Example 1, for thermal stability evaluation, a Labo Plastomill mixer (manufactured by Toyo Seiki Seisakusho, 30C-150) was used for kneading, and the torque value after 10 minutes was divided by the torque value after 1 minute. It was measured by the torque value increase ratio. In addition, the viscosity of the pellet was measured with a capillary flow meter (Toyo Seiki Seisakusho, Capillograph PM-C) using 250.
The measurement was carried out at a shear rate of 1216 sec −1 at 12 ° C.
【００３５】その押出成形性は、単軸押出機（池貝製、
ＦＳ−４０）を使用して、外径２０ｍｍ、内径１８ｍｍ
の円筒形状のボンド磁石で評価した。○印は通常の成形
条件で円筒形状に成形できたもの、及び×印はダイに詰
って成形できなかったものである。The extrudability of the single-screw extruder (made by Ikegai,
FS-40), outer diameter 20mm, inner diameter 18mm
The evaluation was made with the cylindrical bonded magnet. The ∘ mark shows that it could be formed into a cylindrical shape under normal forming conditions, and the X mark shows that it could not be formed because the die was clogged.
【００３６】結果を、表１に示したが、熱安定性、押出
成形性及び磁気特性について実用価値のある高品質のも
のであった。The results are shown in Table 1, which was of high quality with practical value in terms of thermal stability, extrusion moldability and magnetic properties.
【００３７】比較例３ 表２の比較例３で示す組成を用いて、実施例１と同様の
方法でボンド磁石成形用組成物を作製した。Comparative Example 3 Using the composition shown in Comparative Example 3 in Table 2, a bonded magnet molding composition was prepared in the same manner as in Example 1.
【００３８】得られたボンド磁石成形用組成物につき、
実施例３と同様に評価した。With respect to the obtained bonded magnet molding composition,
Evaluation was performed in the same manner as in Example 3.
【００３９】結果を、表１に示したが、熱安定性は実施
例に比べて劣り、シリコーンオイルを実施例の５倍も使
用したのに拘わらず、粘度とも好しくない値を示し、ダ
イに詰まり成押出形することができず、従って磁気特性
を測定することができなかった。The results are shown in Table 1. The thermal stability was inferior to that of the examples, and although the silicone oil was used 5 times as much as the examples, the viscosity showed an unfavorable value. It was not possible to measure the magnetic properties because it could not be extrusion molded.
【００４０】実施例４ 表３の実施例４で示すポリアミド共重合体を含む組成を
用いて、実施例１と同様の方法でボンド磁石成形用組成
物を作製した。Example 4 Using the composition containing the polyamide copolymer shown in Example 4 of Table 3, a bonded magnet molding composition was prepared in the same manner as in Example 1.
【００４１】得られたボンド磁石成形用組成物につき、
実施例１と同様に熱安定性評価としてラボプラストミル
ミキサー（東洋精機製作所製、３０Ｃ−１５０）を用い
て２５０℃で混練し、１０分後のトルク値を１分後のト
ルク値で除算したトルク値上昇比で測定した。また、ペ
レットの粘度をキャピラリーフローメーター（東洋精機
製作所製、キャピログラフＰＭ−Ｃ）を用いて、２１０
℃、２４．３ｓｅｃ-1の剪断速度で測定した。その押出
成形性は、単軸押出機（池貝製、ＦＳ−４０）を使用し
て、外径４．６ｍｍ、内径３．６ｍｍ、横幅７．１ｍｍ
の瓦形状のボンド磁石で評価した。印はダイより所定の
形状のものが高速度で出てきたもの、○印はダイより所
定の形状のものが低速度で出てきたもの、△印はダイよ
り組成物は出てくるが、エッジ部にでこぼこがあり所定
の形状でなかったもの、及び×印はダイに詰まり成形で
きなかったものである。With respect to the obtained bonded magnet molding composition,
As in Example 1, for thermal stability evaluation, a Labo Plastomill mixer (manufactured by Toyo Seiki Seisakusho, 30C-150) was used for kneading, and the torque value after 10 minutes was divided by the torque value after 1 minute. It was measured by the torque value increase ratio. In addition, the viscosity of the pellets was measured with a capillary flow meter (Toyo Seiki Seisakusho, Capillograph PM-C) using 210
The measurement was carried out at a shear rate of 24.3 sec -1 at 0 ° C. The extrusion moldability was determined by using a single-screw extruder (FS-40, manufactured by Ikegai) and having an outer diameter of 4.6 mm, an inner diameter of 3.6 mm, and a width of 7.1 mm.
It was evaluated with a roof-shaped bond magnet. The mark shows that the predetermined shape comes out from the die at high speed, the ○ mark shows the predetermined shape comes out from the die at low speed, and the △ mark shows the composition comes out from the die, The edge part had unevenness and had a non-predetermined shape, and the mark x indicates that the die was clogged and molding could not be performed.
【００４２】結果を、表３に示したが、熱安定性、押出
成形性及び磁気特性について実用価値のある高品質のも
のであつた。The results are shown in Table 3, which was of high quality with practical value in terms of thermal stability, extrusion moldability and magnetic properties.
【００４３】実施例５〜７ 表３の実施例５〜７で示すポリアミド共重合体を含む組
成を用いて、実施例１と同様の方法でボンド磁石成形用
組成物を作製した。Examples 5 to 7 By using the compositions containing the polyamide copolymers shown in Examples 5 to 7 of Table 3, a bonded magnet molding composition was prepared in the same manner as in Example 1.
【００４４】得られたボンド磁石成形用組成物につき、
実施例４と同様に評価した。With respect to the obtained bonded magnet molding composition,
Evaluation was performed in the same manner as in Example 4.
【００４５】結果を、表３に示した。得られたボンド磁
石成形用組成物は熱安定性、押出成形性及び磁気特性に
ついて実用価値のある高品質のものであった。The results are shown in Table 3. The obtained bonded magnet molding composition was of high quality with practical value in terms of thermal stability, extrusion moldability and magnetic properties.
【００４６】比較例４〜５ 表３の比較例４〜５で示す組成を用いて、実施例１と同
様の方法でボンド磁石成形用組成物を作製した。Comparative Examples 4 to 5 Using the compositions shown in Comparative Examples 4 to 5 in Table 3, a bonded magnet molding composition was prepared in the same manner as in Example 1.
【００４７】得られたボンド磁石成形用組成物につき、
実施例４と同様に評価した。With respect to the obtained bonded magnet molding composition,
Evaluation was performed in the same manner as in Example 4.
【００４８】結果を、表３に示した。押出成形は実施不
可能であったり、エッジ部がでこぼこしたものしか成形
できず、実用価値のないものであった。The results are shown in Table 3. Extrusion molding cannot be carried out, or only those with a rugged edge can be molded, which is of no practical value.
【００４９】[0049]
【表１】 [Table 1]
【００５０】[0050]
【表２】 [Table 2]
【００５１】[0051]
【表３】 [Table 3]
【００５２】[0052]
【発明の効果】本発明により、磁性材料を高密度に充填
して磁気特性を高めた、射出成形及び押出成形によって
成形加工することができる成形加工性の良いボンド磁石
成形用組成物を提供することができた。また、得られた
ボンド磁石は、成形後に機械特性が低下せず、射出成形
並びに押出成形の何れの場合も、圧縮成形によつて得ら
れるものと同程度の高性能の磁気特性を有する磁石であ
った。According to the present invention, there is provided a bond magnet molding composition which is filled with a magnetic material at a high density to enhance magnetic properties and which can be molded by injection molding and extrusion molding and has good moldability. I was able to do it. Further, the obtained bonded magnet is a magnet having a high-performance magnetic property similar to that obtained by compression molding in both injection molding and extrusion molding, without deterioration of mechanical properties after molding. there were.
─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成４年１２月２４日[Submission date] December 24, 1992
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００７[Correction target item name] 0007
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【０００７】本発明で用いられるポリアミド系樹脂とし
ては、例えば６−ナイロン、６，６−ナイロン、１２−
ナイロン等を挙げることができるが、これらに限定され
るものではない。[0007] The polyamide resin used in the present invention, such as 6-nylon, 6,6-nylon, 12 -
Examples thereof include nylon, but are not limited thereto.
【手続補正２】[Procedure Amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００３６[Correction target item name] 0036
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００３６】結果を、表２に示したが、熱安定性、押出
成形性及び磁気特性について実用価値のある高品質のも
のであった。The results are shown in Table 2 , and were of high quality with practical value in terms of thermal stability, extrusion moldability and magnetic properties.
【手続補正３】[Procedure 3]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００３９[Correction target item name] 0039
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００３９】結果を、表２に示したが、熱安定性は実施
例に比べて劣り、シリコーンオイルを実施例の５倍も使
用したのに拘わらず、粘度とも好ましくない値を示し、
ダイに詰まり押出成形することができず、従って磁気特
性を測定することができなかった。[0039] The result, shown in Table 2, thermal stability is inferior as compared with Example, regardless of the silicone oil was used five times in Example illustrates the good or properly value not both viscosity,
The die was clogged and could not be extruded and therefore the magnetic properties could not be measured.
【手続補正４】[Procedure amendment 4]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００４１[Correction target item name] 0041
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００４１】得られたボンド磁石成形用組成物につき、
実施例１と同様に熱安定性評価としてラボプラストミル
ミキサー（東洋精機製作所製、３０Ｃ−１５０）を用い
て２５０℃で混練し、１０分後のトルク値を１分後のト
ルク値で除算したトルク値上昇比で測定した。また、ペ
レットの粘度をキャピラリーフローメーター（東洋精機
製作所製、キャピログラフＰＭ−Ｃ）を用いて、２１０
℃、２４．３ｓｅｃ-1の剪断速度で測定した。その押出
成形性は、単軸押出機（池貝製、ＦＳ−４０）を使用し
て、外径４．６ｍｍ、内径３．６ｍｍ、横幅７．１ｍｍ
の瓦形状のボンド磁石で評価した。◎印はダイより所定
の形状のものが高速度で出てきたもの、○印はダイより
所定の形状のものが低速度で出てきたもの、△印はダイ
より組成物は出てくるが、エッジ部にでこぼこがあり所
定の形状でなかったもの、及び×印はダイに詰まり成形
できなかったものである。With respect to the obtained bonded magnet molding composition,
As in Example 1, for thermal stability evaluation, a Labo Plastomill mixer (manufactured by Toyo Seiki Seisakusho, 30C-150) was used for kneading, and the torque value after 10 minutes was divided by the torque value after 1 minute. It was measured by the torque value increase ratio. In addition, the viscosity of the pellets was measured with a capillary flow meter (Toyo Seiki Seisakusho, Capillograph PM-C) using 210
The measurement was carried out at a shear rate of 24.3 sec -1 at 0 ° C. The extrusion moldability was determined by using a single-screw extruder (FS-40, manufactured by Ikegai) and having an outer diameter of 4.6 mm, an inner diameter of 3.6 mm, and a width of 7.1 mm.
It was evaluated with a roof-shaped bond magnet. ⊚ mark shows that a predetermined shape comes out from the die at high speed, ○ mark shows a predetermined shape from the die comes out at low speed, and △ mark shows the composition comes out from the die. , Those having irregular shapes at the edges and not having a predetermined shape, and those marked with x were those which could not be molded because they were clogged in the die.
【手続補正５】[Procedure Amendment 5]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００４９[Correction target item name] 0049
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００４９】[0049]
【表１】 [Table 1]
【手続補正６】[Procedure correction 6]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００５０[Correction target item name] 0050
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００５０】[0050]
【表２】 [Table 2]
【手続補正７】[Procedure Amendment 7]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００５１[Correction target item name] 0051
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００５１】[0051]
【表３】 [Table 3]
───────────────────────────────────────────────────── フロントページの続き (72)発明者 宮寺 弘美 茨城県つくば市和台47番地 アイ・シー・ アイ・ジヤパン株式会社技術研究所内 (72)発明者 中藤 正徳 茨城県つくば市和台47番地 アイ・シー・ アイ・ジヤパン株式会社技術研究所内 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Hiromi Miyadera 47, Wadai, Tsukuba-shi, Ibaraki IC AI Japan Co., Ltd. Technical Research Institute (72) Masanori Nakato 47, Wadai, Tsukuba-shi, Ibaraki ICI Japan Co., Ltd. Technical Research Center
Claims (5)
なるボンド磁石成形用組成物において、ヒンダードフェ
ノール構造を有するヒドラジン化合物を０．３〜２．０
重量％添加させたことを特徴とするボンド磁石成形用組
成物。1. A hydrazine compound having a hindered phenol structure in an amount of 0.3 to 2.0 in a bonded magnet molding composition comprising a polyamide resin and magnetic material particles.
A composition for molding a bonded magnet, wherein the composition is added by weight%.
を１〜７０重量％含むことを特徴とする請求項１に記載
のボンド磁石成形用組成物。2. The bonded magnet molding composition according to claim 1, wherein the polyamide resin contains 1 to 70% by weight of a polyamide copolymer.
からなることを特徴とする請求項１あるいは２に記載の
ボンド磁石成形用組成物。3. The bonded magnet molding composition according to claim 1, wherein the magnetic material particles are made of neodymium / iron / boron.
なるボンド磁石成形用組成物において、ヒンダードフェ
ノール構造を有するヒドラジン化合物を０．３〜２．０
重量％添加させたボンド磁石成形用組成物を原料として
成形して得たボンド磁石。4. A hydrazine compound having a hindered phenol structure in an amount of 0.3 to 2.0 in a bonded magnet molding composition comprising a polyamide resin and magnetic material particles.
A bonded magnet obtained by molding a composition for molding a bonded magnet, which is added by weight%, as a raw material.
を１〜７０重量％含む請求項１に記載のボンド磁石成形
用組成物を原料として成形して得たボンド磁石。5. A bond magnet obtained by molding the composition for molding a bond magnet according to claim 1 as a raw material, wherein the polyamide resin contains 1 to 70% by weight of a polyamide copolymer.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3270884A JPH05109516A (en) | 1991-10-18 | 1991-10-18 | Composition for formation of bonded magnet, and bonded magnet |
| EP93300006A EP0605934B1 (en) | 1991-10-18 | 1993-01-04 | Bonded magnet moulding composition and bonded magnet |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3270884A JPH05109516A (en) | 1991-10-18 | 1991-10-18 | Composition for formation of bonded magnet, and bonded magnet |
| EP93300006A EP0605934B1 (en) | 1991-10-18 | 1993-01-04 | Bonded magnet moulding composition and bonded magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05109516A true JPH05109516A (en) | 1993-04-30 |
Family
ID=26134132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3270884A Pending JPH05109516A (en) | 1991-10-18 | 1991-10-18 | Composition for formation of bonded magnet, and bonded magnet |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0605934B1 (en) |
| JP (1) | JPH05109516A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5888416A (en) * | 1992-05-12 | 1999-03-30 | Seiko Epson Corporation | Rare-earth bonded magnet composition, rare-earth bonded magnet and process for producing said rare-earth bonded magnet |
| JP2006005304A (en) * | 2004-06-21 | 2006-01-05 | Sumitomo Metal Mining Co Ltd | Rare earth bond magnet and composition for the same |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW323374B (en) * | 1995-11-06 | 1997-12-21 | Seiko Epson Corp |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60127366A (en) * | 1983-12-15 | 1985-07-08 | Tounen Sekiyu Kagaku Kk | Thermoplastic resin composition |
| JPS60156752A (en) * | 1984-01-25 | 1985-08-16 | Daiseru Hiyurusu Kk | Magnetic material composition having high fluidity |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3843442A1 (en) * | 1988-12-23 | 1990-06-28 | Basf Ag | MAGNETIC RECORDING CARRIERS |
-
1991
- 1991-10-18 JP JP3270884A patent/JPH05109516A/en active Pending
-
1993
- 1993-01-04 EP EP93300006A patent/EP0605934B1/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60127366A (en) * | 1983-12-15 | 1985-07-08 | Tounen Sekiyu Kagaku Kk | Thermoplastic resin composition |
| JPS60156752A (en) * | 1984-01-25 | 1985-08-16 | Daiseru Hiyurusu Kk | Magnetic material composition having high fluidity |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5888416A (en) * | 1992-05-12 | 1999-03-30 | Seiko Epson Corporation | Rare-earth bonded magnet composition, rare-earth bonded magnet and process for producing said rare-earth bonded magnet |
| JP2006005304A (en) * | 2004-06-21 | 2006-01-05 | Sumitomo Metal Mining Co Ltd | Rare earth bond magnet and composition for the same |
| JP4501546B2 (en) * | 2004-06-21 | 2010-07-14 | 住友金属鉱山株式会社 | Rare earth bonded magnet composition and rare earth bonded magnet obtained using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0605934B1 (en) | 1996-04-03 |
| EP0605934A1 (en) | 1994-07-13 |
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