JPH0480274A - Electric radiation absorber composition - Google Patents
Electric radiation absorber compositionInfo
- Publication number
- JPH0480274A JPH0480274A JP2193140A JP19314090A JPH0480274A JP H0480274 A JPH0480274 A JP H0480274A JP 2193140 A JP2193140 A JP 2193140A JP 19314090 A JP19314090 A JP 19314090A JP H0480274 A JPH0480274 A JP H0480274A
- Authority
- JP
- Japan
- Prior art keywords
- ferrite powder
- radio wave
- absorber composition
- polyester resin
- coupling agent
- 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
- 239000000203 mixture Substances 0.000 title claims abstract description 11
- 239000006100 radiation absorber Substances 0.000 title abstract 3
- 239000000843 powder Substances 0.000 claims abstract description 19
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 17
- 239000007822 coupling agent Substances 0.000 claims abstract description 12
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229920006230 thermoplastic polyester resin Polymers 0.000 claims abstract description 6
- 229910052742 iron Inorganic materials 0.000 claims abstract description 4
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 4
- 229910052751 metal Inorganic materials 0.000 claims abstract description 3
- 239000002184 metal Substances 0.000 claims abstract description 3
- 239000006096 absorbing agent Substances 0.000 claims description 10
- 150000002739 metals Chemical class 0.000 claims description 2
- 239000002250 absorbent Substances 0.000 claims 1
- 230000002745 absorbent Effects 0.000 claims 1
- 229910052719 titanium Inorganic materials 0.000 abstract description 5
- 239000010936 titanium Substances 0.000 abstract description 5
- 239000002245 particle Substances 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 4
- 229910000708 MFe2O4 Inorganic materials 0.000 abstract description 3
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052748 manganese Inorganic materials 0.000 abstract description 3
- 238000002156 mixing Methods 0.000 abstract description 3
- 229920005989 resin Polymers 0.000 abstract description 3
- 239000011347 resin Substances 0.000 abstract description 3
- 229910000077 silane Inorganic materials 0.000 abstract description 3
- 229910052725 zinc Inorganic materials 0.000 abstract description 3
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 abstract 1
- 229910052726 zirconium Inorganic materials 0.000 abstract 1
- 238000000034 method Methods 0.000 description 6
- 229920001225 polyester resin Polymers 0.000 description 6
- 239000004645 polyester resin Substances 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 5
- -1 polyethylene Polymers 0.000 description 5
- 239000011230 binding agent Substances 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- VXUYXOFXAQZZMF-UHFFFAOYSA-N titanium(IV) isopropoxide Chemical compound CC(C)O[Ti](OC(C)C)(OC(C)C)OC(C)C VXUYXOFXAQZZMF-UHFFFAOYSA-N 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000007983 Tris buffer Substances 0.000 description 1
- SNAMIIGIIUQQSP-UHFFFAOYSA-N bis(6-methylheptyl) hydrogen phosphate Chemical compound CC(C)CCCCCOP(O)(=O)OCCCCCC(C)C SNAMIIGIIUQQSP-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- YACLQRRMGMJLJV-UHFFFAOYSA-N chloroprene Chemical compound ClC(=C)C=C YACLQRRMGMJLJV-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- KNXNFEMPRRJNKP-UHFFFAOYSA-N dioctyl phosphono phosphate propan-2-ol titanium Chemical compound [Ti].CC(C)O.CCCCCCCCOP(=O)(OP(O)(O)=O)OCCCCCCCC.CCCCCCCCOP(=O)(OP(O)(O)=O)OCCCCCCCC.CCCCCCCCOP(=O)(OP(O)(O)=O)OCCCCCCCC KNXNFEMPRRJNKP-UHFFFAOYSA-N 0.000 description 1
- 125000001301 ethoxy group Chemical group [H]C([H])([H])C([H])([H])O* 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 239000012254 powdered material Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229910052845 zircon Inorganic materials 0.000 description 1
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Paints Or Removers (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は電波の反射防止、高周波遮断などのために用い
られる電波吸収体に関するものであり。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a radio wave absorber used for preventing reflection of radio waves, blocking high frequencies, etc.
特に熱可塑性ポリエステル樹脂をバインダーとして用い
る事による耐薬品性、耐熱性、耐候性、耐久性、成形加
工性に優れた電波吸収体組成物に関するものである。In particular, it relates to a radio wave absorber composition that uses a thermoplastic polyester resin as a binder and has excellent chemical resistance, heat resistance, weather resistance, durability, and moldability.
［従来の技術］
電波吸収体はレーダーの橋梁やビルなどの構造物による
幻像による障害防止及び高周波を用いる電子機器の高周
波、しゃ断などの目的で、近年特に、使用量が増加して
いる。[Prior Art] Radio wave absorbers have been increasingly used in recent years, especially for the purpose of preventing interference with radars caused by phantom images from structures such as bridges and buildings, and blocking high frequencies in electronic devices that use high frequencies.
このような電波吸収体を形成するバインダー成分として
は、成形加工の容易さ、施工のやり易さなどから、クロ
ロプレンゴム、ニトリルゴムなどの合成ゴム、ポリエチ
レン、ポリプロピレン、ポリ塩化ビニルなどのポリオレ
フィン系樹脂が用いられて来た。As binder components for forming such radio wave absorbers, synthetic rubbers such as chloroprene rubber and nitrile rubber, and polyolefin resins such as polyethylene, polypropylene, and polyvinyl chloride are used for ease of molding and construction. has been used.
［発明が解決しようとする−謙題］ しかし、従来のバインダー成分では、耐熱性。[The invention attempts to solve the problem - a simple question] However, traditional binder ingredients are heat resistant.
熱変形温度が低く、常用温度は１００”Ｃ以下である。The heat distortion temperature is low, and the normal operating temperature is 100''C or less.
又耐薬品性、耐久性なども充分とは言えず。Also, chemical resistance and durability are not sufficient.
近年信頼性向上の観点からこれらの改善が望まれている
。In recent years, these improvements have been desired from the viewpoint of improving reliability.
そこで２本発明者らは、これらの点に鑑み、鋭意検討の
結果、バインダー成分として従来用いられていなかった
ポリエステル樹脂に着目すると共に、この樹脂の欠点で
あったフィラー成分の分散性、充填性の問題をも解決す
る方法を見出し１本発明を完成するに至った。2 In view of these points, the inventors of the present invention, as a result of intensive studies, focused on a polyester resin that had not been conventionally used as a binder component, and also improved the dispersibility and filling properties of the filler component, which had the drawbacks of this resin. We found a method to solve this problem and completed the present invention.
［課題を解決するための手段］
本発明によれば、一般式がＭＦｅ２Ｏ４（但しＭはＭｎ
、Ｚｎ、Ｎｉ、Ｆｅ、Ｃｏなる群から選ばれた一種又は
二種以上の金属）で表わされるフェライト粉末２０〜９
５重量％と熱可塑性ポリエステル樹脂８０〜５重量％と
を有することを特徴とする電波吸収体組成物が得られる
。[Means for Solving the Problems] According to the present invention, the general formula is MFe2O4 (where M is Mn
, Zn, Ni, Fe, and Co) ferrite powder 20-9
5% by weight of the thermoplastic polyester resin and 80 to 5% by weight of the thermoplastic polyester resin.
また１本発明によれば、前記フェライト粉末が予めカッ
プリング剤にて表面処理されて成ることを特徴とする前
記電波吸収体組成物が得られる。According to one aspect of the present invention, there is obtained the radio wave absorber composition characterized in that the ferrite powder is surface-treated with a coupling agent in advance.
更に本発明によれば、前記カップリング剤か有機チタネ
ート系であることを特徴とする前記記載の電波吸収体組
成物が得られる。Furthermore, according to the present invention, there is obtained the radio wave absorber composition described above, characterized in that the coupling agent is an organic titanate type.
即ち本発明の特徴はフェライト粉末を予めシラン系又は
チタン系のカップリング剤で表面改質し表面状態を親油
性とする事及びポリエステル樹脂は２０メツシユパスの
粉末状のものを用いる事にある。That is, the characteristics of the present invention are that the surface of the ferrite powder is modified in advance with a silane-based or titanium-based coupling agent to make the surface state lipophilic, and that the polyester resin is used in the form of a 20 mesh pass powder.
本発明に用いるフェライト粉末は、一般式ＭＦｅ２Ｏ４
（但し１ＭはＭｎ、Ｚｎ、Ｎｉ、Ｆｅ。The ferrite powder used in the present invention has the general formula MFe2O4
(However, 1M is Mn, Zn, Ni, Fe.
Ｃｏなる群から選ばれた一種又は二種以上の金属）で表
わされるもので平均粒径が０．５〜１０μに制御された
ものが成形性からも望ましい。One or more metals selected from the group consisting of Co) with an average particle size controlled to 0.5 to 10 μm is desirable from the viewpoint of formability.
本フェライト粉末は、予めカップリング剤にて表面処理
を行う。カップリング剤の種類は、シラン系、チタン系
、ジルコン系、いずれも効果があるが、チタン系のカッ
プリング剤が樹脂との密着性、相溶性の点から望ましい
。具体的には、トリステアロイルイソプロピルチタネー
ト、ジステアロイルジイソプロピルチタネートイソプロ
ピルトリ（ジイソオクチルホスフェート）チタネート。This ferrite powder is surface-treated with a coupling agent in advance. Silane-based, titanium-based, and zircon-based coupling agents are all effective, but titanium-based coupling agents are preferred from the viewpoint of adhesion and compatibility with the resin. Specifically, tristearoyl isopropyl titanate, distearoyl diisopropyl titanate isopropyl tri(diisooctyl phosphate) titanate.
イソプロピルトリ（ジオクチルピロホスフェート〕チタ
ネート、イソプロピルトリス［２（２−アミノエチルア
ミノ）エトキシ］チタネートなどが挙げられる。Examples include isopropyl tri(dioctylpyrophosphate) titanate and isopropyl tris[2(2-aminoethylamino)ethoxy]titanate.
フェライト粉末に対するカップリング剤の量は。What is the amount of coupling agent to ferrite powder?
０．１〜５重量％の範囲で行われるが、特に、０．５〜
３重量％が経済的効果と表面改質効果の双方がら見て好
ましい。カップリング方法はトライブレンド法、溶剤浸
漬法、スプレー法のいずれの方法でもかまわない。It is carried out in a range of 0.1 to 5% by weight, especially 0.5 to 5% by weight.
3% by weight is preferable from the viewpoint of both economical effect and surface modification effect. The coupling method may be any of the triblend method, solvent immersion method, and spray method.
本発明に用いるポリエステル樹脂として、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などが挙
げられる。いずれも２ｏメツシユバス以下の粉末状のも
のが、フェライトとの均一混合混練のために好ましい。Examples of the polyester resin used in the present invention include polyethylene terephthalate and polybutylene terephthalate. Powdered materials with a mesh size of 2 o mesh or less are preferred for uniform mixing and kneading with ferrite.
フェライト粉末とポリエステル樹脂の混合比は。What is the mixing ratio of ferrite powder and polyester resin?
フェライト粉末２０〜９５重量％、ポリエステル樹脂８
０〜５重量％の範囲で調整されるが電波吸収特性と成形
品の機械強度、成形性とのバランスで目的に応じて選択
出来る。Ferrite powder 20-95% by weight, polyester resin 8
It is adjusted in the range of 0 to 5% by weight, and can be selected depending on the purpose depending on the balance between radio wave absorption characteristics and mechanical strength and moldability of the molded product.
本発明における成形方法は押出成形、射出成形。The molding method used in the present invention is extrusion molding or injection molding.
ホットプレスいずれの方法も採用出来る。Hot press Either method can be used.
［実施例］ 以下本発明の詳細な説明する。[Example] The present invention will be explained in detail below.
実施例−１
平均粒径１μのＭ ｎ −Ｚ ｎフェライト粉末７０部
を高速ミキサー内に仕込み、１５００ｒｐｍで回転させ
ながらトリステアロイルイソプロピルチタネート０．７
部を添加した。添加後１００℃で３０分間撹拌を続けた
後、５０℃以下に冷却した。その後、ポリエチレンテレ
フタレート粉末２９，３部を加え、５００ｒｐｍで撹拌
混合を行った。得られた混合物を二軸押出機に投入し、
成形温度２９０℃にて押出し、シート状の製品を得た。Example-1 70 parts of Mn-Zn ferrite powder with an average particle size of 1μ was charged into a high-speed mixer, and while rotating at 1500 rpm, 0.7 parts of tristearoyl isopropyl titanate was added.
part was added. After the addition, stirring was continued for 30 minutes at 100°C, and then cooled to 50°C or lower. Thereafter, 29.3 parts of polyethylene terephthalate powder was added and mixed by stirring at 500 rpm. The resulting mixture was put into a twin screw extruder,
It was extruded at a molding temperature of 290°C to obtain a sheet-like product.
このものの電波吸収特性、物性をクロロブレンベースの
電波吸収体と比較して表−１に示すが。The radio wave absorption characteristics and physical properties of this product are compared with those of chloroprene-based radio wave absorbers and are shown in Table 1.
電波吸収特性が同等であると同時に他の物性はいずれも
優れていた。The radio wave absorption properties were comparable, and at the same time all other physical properties were excellent.
実施例−２
平均粒径１．５μのＭ ｎ −Ｚ ｎフェライト粉末７
０部を高速ミキサー内に仕込み、１５００ｒｐｍの回転
下でトリステアロイルイソプロピルチタネート０，７部
を添加し、１００℃で３０分間撹拌を続けた後、槽内を
５０℃以下まで冷却し、ポリブチレンテレフタレート粉
末２９．３部を加え、５００ｒｐ厘で撹拌混合を行った
。得られた混合物を二軸押出機にて混練しペレットとし
た。このものを射出成形機により成形しく成形温度２７
０℃、射出圧力５０ｋｇ／ｃｄ）測定評価用のテストピ
ースを得た。Example-2 Mn-Zn ferrite powder 7 with an average particle size of 1.5μ
0 part was placed in a high-speed mixer, 0.7 parts of tristearoyl isopropyl titanate was added while rotating at 1500 rpm, and stirring was continued at 100°C for 30 minutes. 29.3 parts of powder was added and mixed by stirring at 500 rpm. The resulting mixture was kneaded using a twin-screw extruder to form pellets. This product is molded using an injection molding machine at a molding temperature of 27
A test piece for measurement and evaluation (0°C, injection pressure 50 kg/cd) was obtained.
このものの電波吸収特性及び物性を表−１に示したがい
ずれも目的は充分達している。The radio wave absorption characteristics and physical properties of this product are shown in Table 1, and both have fully achieved their objectives.
［発明の効果］
以上の説明のとおり本発明によれば、ポリエステル樹脂
をバイレダー成分とすると共に、カーボン・フェライト
のフィラー成分の分散性充填性を向上させることを可能
としたことから優れた電波吸収特性を維持しつつ、帯薬
品性、耐熱性、耐候性にも優れた電波吸収体を提供する
ことができる。[Effects of the Invention] As explained above, according to the present invention, it is possible to use polyester resin as a Byredder component and improve the dispersibility and filling properties of the filler component of carbon ferrite, thereby achieving excellent radio wave absorption. It is possible to provide a radio wave absorber that maintains its characteristics and has excellent chemical resistance, heat resistance, and weather resistance.
Claims (3)
ｎ、Ｎｉ、Ｆｅ、Ｃｏなる群から選ばれた一種又は二種
以上の金属）で表わされるフェライト粉末２０〜９５重
量％と熱可塑性ポリエステル樹脂８０〜５重量％とを有
することを特徴とする電波吸収体組成物。(1) The general formula is MFe_2O_4 (where M is Mn, Z
A radio wave characterized by comprising 20 to 95% by weight of ferrite powder represented by one or more metals selected from the group consisting of n, Ni, Fe, and Co) and 80 to 5% by weight of thermoplastic polyester resin. Absorbent composition.
面処理されて成ることを特徴とする第１項記載の電波吸
収体組成物。(2) The radio wave absorber composition according to item 1, wherein the ferrite powder is surface-treated with a coupling agent in advance.
とを特徴とする第１又は第２請求項記載の電波吸収体組
成物。(3) The radio wave absorber composition according to claim 1 or 2, wherein the coupling agent is an organic titanate type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2193140A JPH0480274A (en) | 1990-07-23 | 1990-07-23 | Electric radiation absorber composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2193140A JPH0480274A (en) | 1990-07-23 | 1990-07-23 | Electric radiation absorber composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0480274A true JPH0480274A (en) | 1992-03-13 |
Family
ID=16302951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2193140A Pending JPH0480274A (en) | 1990-07-23 | 1990-07-23 | Electric radiation absorber composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0480274A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0831074A3 (en) * | 1996-09-19 | 1998-10-07 | Sung-Yong Hong | A ceramic composition for absorbing electromagnetic wave and a method for manufacturing the same |
| CN100351322C (en) * | 2004-05-11 | 2007-11-28 | 南京工业大学 | Iron powder absorbent and preparation method thereof |
| CN100371396C (en) * | 2004-05-11 | 2008-02-27 | 南京工业大学 | Iron powder absorbent and preparation method and application thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5613704A (en) * | 1979-07-13 | 1981-02-10 | Teijin Ltd | Ferrite-containing composite substance |
| JPS60173052A (en) * | 1984-02-20 | 1985-09-06 | Mitsui Toatsu Chem Inc | Resin composition |
| JPS62227956A (en) * | 1986-03-22 | 1987-10-06 | バスフ アクチェン ゲゼルシャフト | Electromagnetic wave absorbing synthetic resin composition containing ferroelectric substance and/or piezoelectric substance |
-
1990
- 1990-07-23 JP JP2193140A patent/JPH0480274A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5613704A (en) * | 1979-07-13 | 1981-02-10 | Teijin Ltd | Ferrite-containing composite substance |
| JPS60173052A (en) * | 1984-02-20 | 1985-09-06 | Mitsui Toatsu Chem Inc | Resin composition |
| JPS62227956A (en) * | 1986-03-22 | 1987-10-06 | バスフ アクチェン ゲゼルシャフト | Electromagnetic wave absorbing synthetic resin composition containing ferroelectric substance and/or piezoelectric substance |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0831074A3 (en) * | 1996-09-19 | 1998-10-07 | Sung-Yong Hong | A ceramic composition for absorbing electromagnetic wave and a method for manufacturing the same |
| CN100351322C (en) * | 2004-05-11 | 2007-11-28 | 南京工业大学 | Iron powder absorbent and preparation method thereof |
| CN100371396C (en) * | 2004-05-11 | 2008-02-27 | 南京工业大学 | Iron powder absorbent and preparation method and application thereof |
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