JPS5986638A - Resin composition having excellent electromagnetic wave shielding property and rigidity - Google Patents

Abstract

PURPOSE:To provide the titled resin compsn. suitable for use as a housing material for apparatuses with a built-in computor, consisting of a scaly inorg. compd. having a metallic coating and a resin. CONSTITUTION:The surface of a scaly inorg. compd. such as mica having a diameter of 5-3,000mu and an aspect ratio of 10-150 is coated with a metal such as silver, aluminum or copper in a quantity of 1/5-1 time by weight that of the compd. 30-80pts.wt. resin such as polyvinyl chloride, polyethylene or epoxy resin and 70-20pts.wt. said metal-coated inorg. compd. are mixed together.

Description

【発明の詳細な説明】 本発明は電磁じゃへい性および剛性に優れた樹脂組成物
に関する。さらに詳しくは、３０〜８０市量部の樹脂と
７０〜２０重量部の鱗片状無機化合物とからなり、かつ
該鱗片状無機化合物の表面部分が該鱗片状無機化合物の
１１５〜１重量倍量の金属で被覆されていることを特徴
とする電磁じゃへい性および剛性に優れた樹脂組成物に
関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a resin composition having excellent electromagnetic resistance and rigidity. More specifically, it is composed of 30 to 80 parts by weight of resin and 70 to 20 parts by weight of a scaly inorganic compound, and the surface portion of the scaly inorganic compound is 115 to 1 times the weight of the scaly inorganic compound. The present invention relates to a resin composition that is coated with metal and has excellent electromagnetic resistance and rigidity.

近年、電子機器の発達と共に電磁障害という新しい社会
問題が生じてきた。これは諸環境下での各種ノイズによ
ってコンピューターが誤動作する等のトラブルであり、
最近では各種装置がコンピューターによって制御されて
いるので大きな事故になりかねないっ特に機器の軽量化
、コンパクト化の要求によって、そのハウジングが殆ん
どプラスチックでできでいることも問題点の一つであり
、米国ではｔ；’ｃｃ等の規制値も制定さ、′ｆでいる
。その対策としで、現在では１）金１萬溶射、２）導Ｈ
ｔ、性塗料。In recent years, with the development of electronic devices, a new social problem called electromagnetic interference has arisen. This is a problem where the computer malfunctions due to various noises in various environments.
Nowadays, various devices are controlled by computers, which can lead to serious accidents.One of the problems is that most of the housings are made of plastic, especially due to the demand for lighter and more compact devices. In the United States, regulatory values such as t;'cc and 'f' have been established. As a countermeasure, the current methods are: 1) 10,000 gold thermal spraying, 2) conductive H
T, sex paint.

３）導電性フィラー混入プラスチックスの６つの方法も
しくは素材が使われているが、１入２の方法は副側でか
つ寿命が短かく、最近では３）の技術分野が優勢である
。しかし金属繊維や導電性フィラーを樹脂に混入して成
形物を得ることは答易ではなく、かつ添加量が少ないと
その電磁じゃへい効果は見出せない。また電子機器のハ
ウジングを導電性にすることは漏電がある場合には非常
に危険であり、結縛性も必要である。このように一方で
は導電性他方では絶縁性という一見矛盾した性能が要求
されている。さらに、電子機器や通信機器のハウジング
には剛性や耐熱性も要求されでおり、このような条件を
すべで満足しうる素材はいまｒご開発されておらず、電
磁じゃへい作用についても本格的に究明されていないの
が現状であるう以上のような現状に鑑み、本発明者らは
上記条件を満足しうる素材を開発すべく鋭意研究を重ね
た結１１．ｆ［性素材による電磁じゃへい効用の本質は
、素材内部に発生したうず狐＾によるエネルギ損失であ
ることをつきとめ、かかる原理を応用すれば導電性と絶
縁性を兼ね備えた、−見矛盾するような要求性能を満足
しうる素材の開発が可能であることを見い出し本発明に
到ったものである。3) Six methods or materials for plastics containing conductive fillers have been used, but the 1-in-2 method is a side-effect and has a short lifespan, so recently the technology field in 3) is predominant. However, it is not easy to obtain a molded product by mixing metal fibers or conductive fillers into a resin, and if the amount added is small, the electromagnetic blocking effect cannot be observed. Furthermore, making the housing of an electronic device electrically conductive is extremely dangerous in the event of electrical leakage, and binding properties are also required. In this way, seemingly contradictory properties are required: conductivity on the one hand and insulation on the other. Furthermore, rigidity and heat resistance are also required for the housings of electronic and communication equipment, and no material has yet been developed that satisfies all of these conditions, and there is no material that can fully meet the requirements for electromagnetic interference. In view of the above-mentioned current situation, the present inventors have conducted extensive research to develop a material that can satisfy the above conditions.11. It was discovered that the essence of the electromagnetic interference effect of f [materials is the energy loss due to the whirlpool generated inside the material, and by applying this principle, it is possible to create a material that has both conductivity and insulation properties. We have discovered that it is possible to develop a material that can satisfy the required performance, and have arrived at the present invention.

すなわち本発明は、３０〜８０重量部の樹脂と７０〜２
０重量部の鱗片状無機化合物とからなり、かつ該鱗片状
無機化合物の表面部分が該鱗片状無機化合物の１１５〜
１重量倍量の金属で被覆されでいることを特徴とする電
磁じゃへい性および剛性に優れた樹脂組成物である。That is, the present invention uses 30 to 80 parts by weight of resin and 70 to 2 parts by weight.
0 parts by weight of a scale-like inorganic compound, and the surface portion of the scale-like inorganic compound is 115 to 0 parts by weight of the scale-like inorganic compound.
This resin composition has excellent electromagnetic resistance and rigidity, and is characterized by being coated with 1 times the amount of metal by weight.

素材中の導電性材料が相互に接触し、閉回路を形成する
ように配列された場合、変化する磁場中ではファラデー
の誘電法則に従って導電性材料中にうす電流を生ずるが
、そのうず電流によってジュール熱が発生し、エネルギ
ーが失われて電磁じゃへい効果が発現する。かかる効果
を有する導電性材料としては、金属繊維や導電性フィラ
ーのように全体が導電性になっている必要はなく、例え
ば表面部分子ごけ導電性であって内部は逆に絶縁性のも
のであってもかまわない。ハウジング素材としでの剛性
や耐熱性等の特性や成形性を考慮すると、このような要
求を満足する素材を提供しうるフィラーとしては、表面
が金属で被覆された鱗片状化合物が最も適しでいる。本
発明の樹脂組成物はコンピューター等の電子機器や通信
機器のハウジング材料等に適した素材であり、１０キロ
ヘルツ〜−ギカヘルッの周波数領域の電磁波に対して２
０〜６０デシベルの優れた電磁しやへい効果を有し、か
つ樹脂単独の場合にくらべて曲げ弾性率が６〜８倍、熱
変形温度が３０〜１５０℃上昇するという優れた剛性お
よび耐熱性を有している。When conductive materials in a material are arranged in such a way that they are in contact with each other and form a closed circuit, in a changing magnetic field, a dilute current is produced in the conductive material according to Faraday's law of dielectricity; Heat is generated, energy is lost, and an electromagnetic interference effect occurs. A conductive material that has such an effect does not need to be entirely conductive like metal fibers or conductive fillers; for example, it may be a material whose surface is molecularly conductive but whose interior is insulating. It doesn't matter if it is. Considering the characteristics such as rigidity and heat resistance as well as formability as a housing material, a scaly compound whose surface is coated with metal is the most suitable filler that can provide a material that satisfies these requirements. . The resin composition of the present invention is a material suitable for housing materials for electronic equipment such as computers and communication equipment, and is resistant to electromagnetic waves in the frequency range of 10 kilohertz to -Ghikahertz.
It has an excellent electromagnetic shielding effect of 0 to 60 decibels, and has excellent rigidity and heat resistance, with a flexural modulus of elasticity 6 to 8 times higher than that of resin alone, and a heat distortion temperature of 30 to 150 degrees Celsius. have.

本発明で用いられる樹脂は成形可能ないかなる高分子材
料でも良く、例えばポリ塩化ビニル、ポリエチレン、ポ
リプロピレン、ポリスチレン、ポリメチルメタアクリレ
ート、ＡＳ樹脂、　ＡＢ８　ｍ脂。The resin used in the present invention may be any moldable polymeric material, such as polyvinyl chloride, polyethylene, polypropylene, polystyrene, polymethyl methacrylate, AS resin, AB8 m resin.

ポリエチレンテレフタレート、ポリブチレンテレフタレ
ート、ポリカーボネート、ポリウレタン樹す酢酸ビニル
、酢酸ビニル−エチレン共重合体。Polyethylene terephthalate, polybutylene terephthalate, polycarbonate, polyurethane resin vinyl acetate, vinyl acetate-ethylene copolymer.

ポリ塩化ビニル、ポリアクリル酸エステル等のエマルジ
ョン状の樹脂、　　８８Ｒや各種天然および合成ゴムの
ラテックス状樹脂もしくは塊状ゴム、不飽和ポリエステ
ル樹脂、エポキシ樹脂、フェノール樹脂、尿素樹脂、メ
ラミン樹脂等の熱硬化性樹脂を挙げることができる。Heat curing of emulsion resins such as polyvinyl chloride and polyacrylic acid esters, latex resins or block rubbers such as 88R and various natural and synthetic rubbers, unsaturated polyester resins, epoxy resins, phenol resins, urea resins, melamine resins, etc. For example, polyester resins can be mentioned.

本発明で用いられる鱗片状無機化合物としては、雲母、
タルク、セリサイト、ガラスフレーク、層状グラファイ
ト、バーミキュライト、ベントナイト、アタパルジャイ
ト等が挙げられる。該鱗片状無機化合物は、成形性や成
形物の諸物性の点から直径５〜３，０００μ、アスペク
ト比は１０〜１５０であることが好ましい、とくに、雲
母族、脆雲母族および緑泥石族に属する天然および人工
の鉱物は最も好ましく用いられる鱗片状無機化合物であ
り、具体的には天然の白雲母（マスコバイト）、金雲母
（クロゴバイト）、黒雲母（バイオタイト）、該鱗片状
無機化合物の表面を被覆する金属としでは、導電性、付
着性１価格等の点から銀、銅。The scaly inorganic compounds used in the present invention include mica,
Examples include talc, sericite, glass flakes, layered graphite, vermiculite, bentonite, and attapulgite. The scale-like inorganic compound preferably has a diameter of 5 to 3,000 μm and an aspect ratio of 10 to 150 from the viewpoint of moldability and various physical properties of the molded product, and is particularly suitable for mica group, brittle mica group, and chlorite group. The most preferred natural and artificial minerals are scaly inorganic compounds, specifically natural muscovite, phlogopite, biotite, and scaly inorganic compounds. When it comes to metals for coating the surface, silver and copper are used because of their conductivity, adhesion, and cost.

鉄、ニッケル、アルミニウム、スズ、クロム、チタン、
亜鉛、金、白金のいずれがおよびその合金が適しでおり
、電磁しやへい性の点からは、樹脂との混合比にもよる
が、該鱗片状無機化合物の１１５〜１重量倍量の前述の
金属でその表面が被覆されていることが好ましい。金属
の被覆量が該鱗片状無機化合物の１１５重量倍量より少
ない場合は電磁じゃへい効果が少なく、また１重量倍量
より多い場合は高温で混合される樹脂を分解劣化させる
作用を有するものもあるので好ましくない。金属による
表面の被覆方法はいずれの方法によってもよいが、例え
ば適当な濃度の金鋼塩化合物溶液中に該鱗片状無機化合
物を分散させ、つぎに溶液、を還元して鱗片状無機化合
物表向に金属粒子を析出させる方法等の無電解メッキ法
や真空蒸着法、スパッタリソグ法、イオンブレーティン
グ法等が使用できる。。iron, nickel, aluminum, tin, chromium, titanium,
Any of zinc, gold, platinum and their alloys are suitable, and from the viewpoint of electromagnetic resistance and resistance, depending on the mixing ratio with the resin, the above-mentioned amount of 115 to 1 times the weight of the scale-like inorganic compound is suitable. Preferably, the surface is coated with a metal. If the amount of metal coating is less than 115 times the weight of the scale-like inorganic compound, the electromagnetic blocking effect will be small, and if it is more than 1 times the amount by weight, it may have the effect of decomposing and deteriorating the resin mixed at high temperatures. I don't like it because it is. Any method may be used to coat the surface with metal, but for example, the scale-like inorganic compound is dispersed in a gold steel salt compound solution with an appropriate concentration, and then the solution is reduced to coat the surface of the scale-like inorganic compound. An electroless plating method, a vacuum evaporation method, a sputtering method, an ion blating method, etc. can be used, such as a method of depositing metal particles. .

その他、本発明で用いられる金属で表面を被覆された鱗
片状無機化合物の他憂こ、目的に応じでカラス繊維、炭
素繊維、アラミド繊維等の強化材、炭酸カルンウム、硫
酸バリウム、クレイ等のフィラー、カーボンブラック、
酸化チタン等の顔料や老化防止剤、＃：外外線吸収剤ジ
シランカップリング剤内部離型剤等を添加する必要があ
ることは貰うまでもない、。In addition to the scale-like inorganic compound whose surface is coated with metal used in the present invention, reinforcing materials such as glass fiber, carbon fiber, and aramid fiber, and fillers such as carunium carbonate, barium sulfate, and clay, depending on the purpose. ,Carbon black,
It goes without saying that it is necessary to add pigments such as titanium oxide, anti-aging agents, external radiation absorbers, disilane coupling agents, internal mold release agents, etc.

本発明の効果を充分に発揮させるには、樹脂と金属で表
面を被覆された鱗片状無機化合物とは重量比で５０／７
０〜８０／２０の組成割合で実施されるのが好ましい２
．鱗片状無機化合物が上記組成割合すり少ないと電磁じ
ゃへい効果が乏しく、また上記組成割合より多いと成形
が困難となって美麗な外観を有する成形物を得ることが
難しい。In order to fully exhibit the effects of the present invention, the weight ratio of the scale-like inorganic compound whose surface is coated with resin and metal is 50/7.
Preferably carried out at a composition ratio of 0 to 80/202
．． If the proportion of the scale-like inorganic compound is less than the above-mentioned composition ratio, the electromagnetic shielding effect will be poor, and if it is more than the above-mentioned composition ratio, molding becomes difficult and it is difficult to obtain a molded product with a beautiful appearance.

次に該鱗片状無機化合物を樹脂に混合して目的とする成
形物を得るための成形方法としではいかなる方法でも採
用することができるが、例えば樹脂が前述の熱可塑性樹
脂の場合には、予め該鱗片状無機化合物と樹脂とを所定
比で混合して押出機にて混練しペレット状に成形した後
、射出成形機１こで所望の形状の成形物を得ることが好
ましく、もしくは混線押出機にてシート状に押出し、し
かる後に真空成形もしくは圧空成形にて所望の形状に成
形することも可能である、プラスチックスがＩｉ７　述
のエマルジョンやラテックスの形状を有するものの場合
には同様に混線後シート状にし、さらに乾燥して熱プレ
ス等で所望の形状にする方法等の他に、大型のフレーム
等の表面に直接スラリー状物を吹付は成形し乾燥させる
という方法も採用できる。樹脂が熱硬化性樹脂の場合も
極く一般に採用されている方法が用いられるが、ＢＭＯ
やＢＭＯのようなコンパウンドとしで該鱗片状化合物と
ガラス繊維のハイブリッド補強にすることによってより
効果を高めることも可能である。Next, any molding method can be used to mix the scale-like inorganic compound with a resin to obtain the desired molded product, but for example, if the resin is the above-mentioned thermoplastic resin, It is preferable to mix the scale-like inorganic compound and the resin in a predetermined ratio, knead the mixture in an extruder, mold it into pellets, and then obtain a molded product in the desired shape with an injection molding machine, or use a mixed wire extruder. It is also possible to extrude it into a sheet shape using a machine and then form it into a desired shape using vacuum forming or pressure forming.If the plastic has the shape of an emulsion or latex as described in Ii7, it can also be formed into a sheet after cross-wiring. In addition to methods such as forming the material into a shape, drying it, and shaping it into a desired shape using a hot press or the like, it is also possible to use a method in which a slurry-like material is directly sprayed onto the surface of a large frame, etc., then molded and dried. Even when the resin is a thermosetting resin, a very commonly adopted method is used, but BMO
It is also possible to further enhance the effect by using a compound such as BMO or BMO for hybrid reinforcement of the scale-like compound and glass fiber.

このようにして得られた本発明による成形物は電磁じゃ
へい性、および剛性等で優れた特性を有するものである
が、その性能は次のようにしてＩｉ）ト価される。電磁
じゃへい効果の測定法は米国ｐｅＣ（Ｆｅｄｅｒａｌ　
　Ｃｏｍｍｕｎｉｃａｔｉｏｎ　（ｊｏｍｍｉｓｓｉｏ
ｎ　）の定めた方法に準することが望ましいが、簡便的
ｆこは、例えば「工業材料」第２９巻１２月号の５１ペ
ージもしくは３８ページに記載されている方法でも評価
口ｆ能である。この方法はノイズ発生源としてはモータ
ーまたはスパークを使用し、信号をダイポールアンテナ
で受けてスペクトラムアナライザーもしくは電界強度針
で検出する方法であるが、検出には準尖頭横波方式を採
用すべきである。一方、成形物の曲げ弾性率、引張強度
、熱変形温度等の機械特性は個々のプラスチックスに対
応するＪＩＢ規格もしくはＡＳＴＭ規格によって測定・
評価方法は定められでいる。The thus obtained molded product according to the present invention has excellent properties such as electromagnetic resistance and rigidity, and its performance is evaluated as follows. The electromagnetic interference effect measurement method is based on the US PEC (Federal
Communication
Although it is preferable to follow the method specified in ``Industrial Materials'', for example, the method described on page 51 or page 38 of the December issue of Volume 29 of ``Industrial Materials'' is also effective. . This method uses a motor or spark as the noise source, receives the signal with a dipole antenna, and detects it with a spectrum analyzer or field strength needle, but a quasi-peak transverse wave method should be used for detection. . On the other hand, mechanical properties such as flexural modulus, tensile strength, and heat distortion temperature of molded products are measured and determined according to JIB standards or ASTM standards corresponding to individual plastics.
Evaluation methods are established.

以上のように本発明による樹脂組成物は電磁しやへい性
および剛性、耐熱性等に優れるので、テレヒケーム、電
子製版機、電子タイプライタ−９ｍ子式タイムレコータ
ー、電子卓上計算機、電子ミシン、電子レジスター、電
子レンジ、パーソナルコンピューター、ファクシミリ、
　複写機、　７’リンター、　　ＶＴＲ，７’ロッター
、ワードプロセッサー。As described above, the resin composition according to the present invention has excellent electromagnetic resistance, rigidity, heat resistance, etc., so it can be used in telehychemes, electronic plate making machines, electronic typewriters, electronic time recorders, electronic desktop calculators, electronic sewing machines, etc. Electronic registers, microwave ovens, personal computers, facsimiles,
Copy machine, 7' linter, VTR, 7' rotter, word processor.

ディスプレイ、超音波診断装置等の電子機器１通信機器
、医療機器、計測機器等のハウジング材料として広く応
用できるものであり、特にコンビュ−ターを内蔵した装
置１機器に対しては有効である、。It can be widely applied as a housing material for electronic equipment such as displays and ultrasonic diagnostic equipment, communication equipment, medical equipment, measuring equipment, etc., and is particularly effective for equipment that has a built-in computer.

以下、実施例により本発明を具体的に説明するが、これ
らの実施例により本発明は侮辱限定されるものではない
９実施例中、特に断わらない限り「部」は全て重量部を
意味する。EXAMPLES The present invention will be specifically described below with reference to Examples, but the present invention is not limited to these Examples. In the 9 Examples, all "parts" mean parts by weight unless otherwise specified.

実施例１および比較例１．２ 平均直径９０μ、平均アスペクト比５０の金雲母粉体（
カナダ産、■クラレ製スゾライトマイカ）の表面に、無
電解メッキ法によって銅を析出させた。この金属被覆雲
母を塩酸で洗った母液を原子吸光法にて定量分析した結
果、銅の含有量は約６２重量％であった。つぎにマトリ
ックス樹脂としで用いる市販のポリプロピレン樹脂のペ
レットをヘンシェルミキサー中で攪拌しながら、該雲母
の重量の０．５重量％に相当するα−アミノプロピルト
リエトキシシランと所定量の該雲母粉体を添加混合した
。該雲母粉体と該樹脂との混合比は４０／６０重量比で
ある。続いて該混合物を１軸押出機に供給して２５０℃
で溶融混線を行ない、ペレットを得た。さら番こ得られ
たペレットから射出成形によって試験片を、また押出成
形によって厚さ６ｊ　１７メートルのシート状物を得た
。該樹脂組成物のＡ８ＴＭ　ｌ）　６４Ｂに準拠した方
法（荷車１８．６ｋｇ１讐）にて測にした熱変形温度は
１６２℃、またＡ８ＴＭ　Ｄ７９０に準拠した方法にで
測定した曲げ弾性率は７．３　Ｘ　１０　ｋｌｊ／−で
あった。さら（こ得られたシート状物を「工業材料」第
２９巻１２月号３８ページに記載の方法と同様の電磁じ
ゃへい効果測定装置を作製し、モーターをノイズ発生源
とし、スペクトラムアナライザーにて解析した結果、１
０メガヘルツの周波数に対して２６デシベル、１００メ
ガヘルツで６５デシベル、１ギガヘルツで４５デシベル
のしゃへい効果があった・ 実施例１と同様の金属被覆雲母およびポリプロピレン樹
脂を用い、該雲母無添加（比較例１）および該雲母が１
０重量％添加された樹脂組成物（比較例２）の成形物を
同様に得て物性を測定した。その結果、樹脂単独および
該雲母１０重量％添加組成物の熱変形温度は夫々５８℃
、６７℃であり、曲げ弾性率は１．２　Ｘ　１０　ｋｇ
／ｃｒｌ、　１．８　Ｘ　１０’ｋｑ／ｃｔＡであった
。また、電磁じゃへい効果は」―耐用波数でいずれも２
〜５デシベルでほとんど効用は認められなかった。以上
の結果から、本発明による樹脂組成物は金属被覆雲母無
添加および少惜添加物にくらべると優れた剛性、ｆｉＪ
熱性および電磁じゃへい性を有しでいることは明らかで
ある。Example 1 and Comparative Example 1.2 Phlogopite powder with an average diameter of 90μ and an average aspect ratio of 50 (
Copper was deposited on the surface of Canadian-produced (Kuraray Suzolite Mica) by electroless plating. As a result of quantitative analysis of the mother liquor obtained by washing this metal-coated mica with hydrochloric acid by atomic absorption spectrometry, the content of copper was approximately 62% by weight. Next, while stirring pellets of a commercially available polypropylene resin to be used as a matrix resin in a Henschel mixer, α-aminopropyltriethoxysilane corresponding to 0.5% by weight of the mica and a predetermined amount of the mica powder are added. were added and mixed. The mixing ratio of the mica powder and the resin is 40/60 by weight. Subsequently, the mixture was fed to a single screw extruder and heated at 250°C.
The mixture was melted and mixed to obtain pellets. A test piece was obtained by injection molding from the pellets thus obtained, and a sheet having a thickness of 6 mm and 17 meters was obtained by extrusion molding. The heat deformation temperature of the resin composition was 162°C as measured by the method in accordance with A8TM 1) 64B (cart weighing 18.6 kg), and the flexural modulus was 7.3 as measured by the method in accordance with A8TM D790. It was X 10 klj/-. Furthermore, an electromagnetic interference effect measuring device similar to the method described in "Industrial Materials" Vol. 29, December issue, page 38 was prepared using the obtained sheet-like material, and the motor was used as a noise source, and a spectrum analyzer was used to measure the electromagnetic interference effect. As a result of analysis, 1
There was a shielding effect of 26 dB at a frequency of 0 MHz, 65 dB at 100 MHz, and 45 dB at 1 GHz. The same metal-coated mica and polypropylene resin as in Example 1 were used, and no mica was added (comparative example). 1) and the mica is 1
A molded article of a resin composition containing 0% by weight (Comparative Example 2) was similarly obtained and its physical properties were measured. As a result, the heat distortion temperature of the resin alone and the composition containing 10% by weight of mica was 58°C.
, 67°C, and the bending modulus is 1.2 × 10 kg
/crl, 1.8 x 10'kq/ctA. In addition, the electromagnetic interference effect is 2
Almost no effect was observed at ~5 decibels. From the above results, the resin composition according to the present invention has excellent rigidity, fiJ
It is clear that it has thermal and electromagnetic properties.

実施例２および比較例５．４ 実施例１で用いたと同じ金雲母粉体の表面に、同様の無
電解メッキ法にてニッケル金属を析出させた３、この場
合は無電解金属イオン液の濃度および析出時間を変える
ことによって金属含有量が４０重量％および１１重量％
のニッケル被覆雲母粉体を得た。つぎに、マトリックス
樹脂として市販のポリブチレンテレフタレート樹脂を用
い、実施例１と同様の方法にて２４０℃の成形温度でＡ
ｉｌ記ニッケル含有量４０重量％および１１重量％の雲
母粉体をいずれも４０重量％含有する樹脂組成物（実施
例２および比較例３）および樹脂単独（比較例４）から
なる試験片とシート状物を得た。これらの成形物の物性
を実施例１と同様の方法で測定した。その結果、実施例
２、比較例５および４の熱変形温度は夫々１７５℃、１
８０℃、６０℃であった。また曲げ弾性率は夫々１１　
Ｘ　１０’　ｋｇ／ｌｙｌ　。Example 2 and Comparative Example 5.4 Nickel metal was deposited on the surface of the same phlogopite powder as used in Example 1 by the same electroless plating method. In this case, the concentration of the electroless metal ion liquid was and metal content of 40% and 11% by weight by varying the precipitation time.
A nickel-coated mica powder was obtained. Next, using a commercially available polybutylene terephthalate resin as a matrix resin, A
Test pieces and sheets made of resin compositions (Example 2 and Comparative Example 3) and resin alone (Comparative Example 4) containing mica powder with a nickel content of 40% by weight and 11% by weight. I got something like that. The physical properties of these molded products were measured in the same manner as in Example 1. As a result, the heat distortion temperatures of Example 2, Comparative Examples 5 and 4 were 175°C and 1°C, respectively.
The temperatures were 80°C and 60°C. In addition, the bending modulus of elasticity is 11
X 10' kg/lyl.

１２　Ｘ　１０　ｋＶｃａ、　２，５　Ｘ　１０’ｋｇ
７讐であった。さらに実施例２の電磁しやへい効果は１
０メガヘルツで６０デシベル、１００メガヘルツで４０
デシベル、１ギガヘルツで４７デシベルであった。一方
、比較例３の電磁しやへい効果は全周波数域で２〜５デ
シベルであり、比較例４は２〜３デシベルであった。以
上の結果により、鱗片状無機化合物の表面を被覆する金
属量が少ない場合は導電性が得られず、また多量に添加
しても電磁じゃへい効果は得られないが、本発明による
実施例２の樹脂組成物は優れた剛性、耐熱性、電磁じゃ
へい効果を有しでいることが明らかである。12 x 10 kVca, 2,5 x 10'kg
7 He was an enemy. Furthermore, the electromagnetic shielding effect of Example 2 is 1
60 decibels at 0 MHz, 40 at 100 MHz
The decibel was 47 decibels at 1 gigahertz. On the other hand, the electromagnetic shielding effect of Comparative Example 3 was 2 to 5 decibels over the entire frequency range, and that of Comparative Example 4 was 2 to 3 decibels. According to the above results, if the amount of metal coating the surface of the scale-like inorganic compound is small, conductivity cannot be obtained, and even if a large amount is added, no electromagnetic blocking effect can be obtained, but Example 2 according to the present invention It is clear that the resin composition has excellent rigidity, heat resistance, and electromagnetic shielding effect.

実施例３，４および比較例５ 平均直径４０μ、平均アスペクト比５０の金雲母粉体お
よび平均粒径１３μ、アスペクト比１２のタルク粉体の
表面に真空蒸着法にてアルミニウムを被覆した。アルミ
ニウムの含有量は夫々５８重量％および３４重量％であ
った１、つぎにマトリックス樹脂として市販ナイロン６
樹脂を用い実施例１と同様の方法にて前記金属被覆金雲
母もしくは金属被覆タルクを４０重量％含有する樹脂組
成物（実施例６および実施例４）および樹脂単独（比較
例５）からなる試験片とシート状物を得た。Examples 3 and 4 and Comparative Example 5 The surfaces of phlogopite powder with an average diameter of 40 μm and an average aspect ratio of 50 and talc powder with an average particle size of 13 μm and an aspect ratio of 12 were coated with aluminum by vacuum evaporation. The aluminum content was 58% by weight and 34% by weight, respectively1, and commercially available nylon 6 was used as the matrix resin.
A test consisting of a resin composition containing 40% by weight of the metal-coated phlogopite or metal-coated talc (Example 6 and Example 4) and a resin alone (Comparative Example 5) using a resin in the same manner as in Example 1. Pieces and sheets were obtained.

これらの成形物の物性を実施例１と同様の方法にで測定
した。その結果、実施例５．４および比較例５の熱変形
温度は夫々１８０℃、８２℃、６０℃であり、曲げ弾性
率は１０Ｘ１０’にす、５ｊ×１０’ｋｑ／ｃｔＩ％２
．５　Ｘ　１０　ｋｑ／ｌｔＡであった。また実施例５
の電磁しやへい効果は１０メガヘルツで２６デシベル、
１００メカヘルツで３３デシベル、１ギカヘルツで３８
デシベルであり、実施例４の場合は１０メガヘルツで１
５デシベル、１００メガヘルツで１８デシベル、１ギガ
ヘルツで２２デシベルであった。−万比較例５の場合は
全周波数域で２〜３デシベルであった。この結果により
、本発明による樹脂組成物は優れた剛性、耐熱性、電磁
しゃへい効果を有しでいることは明らかである。The physical properties of these molded products were measured in the same manner as in Example 1. As a result, the heat distortion temperatures of Example 5.4 and Comparative Example 5 were 180°C, 82°C, and 60°C, respectively, and the bending modulus was 10×10', 5j×10'kq/ctI%2
．． It was 5×10 kq/ltA. Also, Example 5
The electromagnetic shielding effect is 26 decibels at 10 MHz,
33 decibels at 100 mechahertz, 38 at 1 gigahertz
decibel, and in the case of Example 4, 1 at 10 MHz.
It was 5 decibels, 18 decibels at 100 megahertz, and 22 decibels at 1 gigahertz. -10,000 In the case of Comparative Example 5, it was 2 to 3 decibels in the entire frequency range. From these results, it is clear that the resin composition according to the present invention has excellent rigidity, heat resistance, and electromagnetic shielding effect.

実施例５ 平均直径２８０μ、アスペクト比７０の金雲母粉体表面
に実施例３と同様の方法にでアルミニウムを４０重量％
含有するように被覆した、該雲母粉体６０重量部と平均
直径４μの炭酸カルシウム１０重量部および市販不飽和
ポリエステル樹脂５０重量部とを混合攪拌し、さらにメ
チルエチルケトンパーオキサイドとナフテン酸コバルト
系の組合せによる硬化剤を添加してペーストを調製した
。次に該ペーストをガラスマットに含浸させ、逐次積層
した後室温硬化させ、さらに１００℃にで後硬化させて
厚さ５ミリメートルの積層ＦＲＰ板を作製した。該Ｆ　
ｌｔＰ板の電磁じゃへい効果は１００メガヘルツで５５
デシベルであった。本実施例により、本発明の樹脂組成
物は優れた電磁じゃへい効果を有することが明らかであ
る。Example 5 40% by weight of aluminum was applied to the surface of phlogopite powder with an average diameter of 280μ and an aspect ratio of 70 in the same manner as in Example 3.
60 parts by weight of the mica powder, 10 parts by weight of calcium carbonate having an average diameter of 4μ, and 50 parts by weight of a commercially available unsaturated polyester resin were mixed and stirred, and then a combination of methyl ethyl ketone peroxide and cobalt naphthenate was added. A paste was prepared by adding a curing agent according to. Next, glass mats were impregnated with the paste, successively laminated, cured at room temperature, and then post-cured at 100° C. to produce a laminated FRP board with a thickness of 5 mm. The F
The electromagnetic interference effect of the ltP board is 55 at 100 MHz.
It was a decibel. It is clear from this example that the resin composition of the present invention has an excellent electromagnetic barrier effect.

特許出願人　株式会社　り　ラ　し 代　理　人　弁理士　本多　堅 ３０５Patent applicant RiRashi Co., Ltd. Representative Patent Attorney Ken Honda 305

Claims (4)

【特許請求の範囲】[Claims] （１）３０〜８０重量部の樹脂と７０〜２０重量部の鱗
片状無機化合物とからなり、かつ該鱗片状無機化合物の
表面部分が該鱗片状無機化合物の１１５〜１重量倍量の
金属で被覆されでいることを特徴とする電磁じゃへい性
および剛性に優れた樹脂組成物。(1) Consists of 30 to 80 parts by weight of resin and 70 to 20 parts by weight of a scale-like inorganic compound, and the surface portion of the scale-like inorganic compound is made of metal in an amount of 115 to 1 times the weight of the scale-like inorganic compound. A resin composition having excellent electromagnetic resistance and rigidity, characterized by being coated. （２）該鱗片状無機化合物の平均直径が５〜３，０００
μであり、かつアスペクト比（直径の厚さに対する比）
が１０〜１５０である特許請求の範囲第（１）項に記載
の樹脂組成物。(2) The average diameter of the scale-like inorganic compound is 5 to 3,000.
μ, and the aspect ratio (ratio of diameter to thickness)
10-150, the resin composition according to claim 1. （３）該鱗片状無機化合物が雲母族、脆雲母族および緑
泥石族に属する天然および人工の鉱物である特許請求の
範囲第（１）項または第（２）項に記載の樹脂組成物。(3) The resin composition according to claim (1) or (2), wherein the scaly inorganic compound is a natural or artificial mineral belonging to the mica group, brittle mica group, and chlorite group. （４）該金属が、銀、銅、鉄、ニッケル、アルミニウム
、スズ、クロム、チタン、アンチモン、亜鉛、金、白金
のいずれかの金属単体もしくはこれらの合金である特許
請求の範囲第（１）項、第（２）項または第（３）項に
記載の樹脂組成物。(4) Claim No. 1, wherein the metal is any one of silver, copper, iron, nickel, aluminum, tin, chromium, titanium, antimony, zinc, gold, and platinum, or an alloy thereof. The resin composition according to item (2) or item (3).