JPH07126493A - Epoxy resin cast product and its production - Google Patents
Epoxy resin cast product and its productionInfo
- Publication number
- JPH07126493A JPH07126493A JP29739593A JP29739593A JPH07126493A JP H07126493 A JPH07126493 A JP H07126493A JP 29739593 A JP29739593 A JP 29739593A JP 29739593 A JP29739593 A JP 29739593A JP H07126493 A JPH07126493 A JP H07126493A
- Authority
- JP
- Japan
- Prior art keywords
- epoxy resin
- casting
- cast product
- alumina powder
- particle size
- 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.)
- Granted
Links
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Organic Insulating Materials (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電気・電子部品の注形
に用いる含浸性に優れたエポキシ樹脂注形品およびその
製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an epoxy resin cast product having excellent impregnation property used for casting electric / electronic parts and a method for producing the same.
【０００２】[0002]
【従来の技術】従来から電気・電子部品の注形にはエポ
キシ樹脂組成物が広く使用されている。これらの樹脂組
成物には、エポキシ樹脂、その他の添加剤と共に充填材
が配合されている。この充填材は、一般には樹脂に比較
して比重が大きいため組成物の貯蔵中に沈降し樹脂と分
離する欠点があった。これを改良するために種々の沈降
防止剤が用いられているが満足すべき状態ではない。例
えば、エポキシ樹脂 100重量部に対して充填材が 200重
量部を超える系では、沈降防止剤の影響でコイル等への
樹脂の含浸性が劣るという欠点がある。2. Description of the Related Art Epoxy resin compositions have been widely used for casting electric and electronic parts. These resin compositions contain a filler together with an epoxy resin and other additives. Since this filler generally has a larger specific gravity than the resin, it has a drawback that it sediments during storage of the composition and separates from the resin. Various antisettling agents have been used to improve this, but are not in satisfactory condition. For example, in a system in which the filler exceeds 200 parts by weight with respect to 100 parts by weight of the epoxy resin, there is a drawback that impregnation of the resin into the coil or the like is poor due to the influence of the anti-settling agent.
【０００３】[0003]
【発明が解決しようとする課題】本発明は、上記の欠点
を解消するためになされたもので、充填材が均一に高充
填され、かつコイル等への含浸性に優れたエポキシ樹脂
注形品およびその製造方法を提供しようとするものであ
る。DISCLOSURE OF THE INVENTION The present invention has been made in order to solve the above-mentioned drawbacks, and is an epoxy resin cast product in which a filler is uniformly highly filled and which is excellent in the impregnation property into a coil or the like. And a method for manufacturing the same.
【０００４】[0004]
【課題を解決するための手段】本発明者らは、上記の目
的を達成しようと鋭意研究を重ねた結果、エポキシ樹脂
組成物における所定粒径のアルミナ粉末を予め注形型に
充填することによって、上記の目的が達成できることを
見いだし、本発明を完成したものである。Means for Solving the Problems As a result of intensive studies aimed at achieving the above object, the present inventors have found that an alumina powder having a predetermined particle diameter in an epoxy resin composition is filled in a casting mold in advance. The inventors have found that the above objects can be achieved and completed the present invention.
【０００５】即ち、本発明は、（Ａ）エポキシ樹脂、
（Ｂ）硬化剤および（Ｃ）不定形であって粒径が 0.5〜
3mm のアルミナ粉末を必須成分とするエポキシ樹脂組成
物で注形硬化されてなるエポキシ樹脂注形品である。ま
た、エポキシ樹脂組成物の注形に際して、所定粒径のア
ルミナ粉末を予め注形型に充填した後、前記樹脂成分
［（Ａ）＋（Ｂ）］を注形することを特徴とするエポキ
シ樹脂注形品の製造方法である。That is, the present invention relates to (A) epoxy resin,
(B) curing agent and (C) amorphous, particle size 0.5-
This is an epoxy resin cast product that is cast and cured with an epoxy resin composition containing 3 mm of alumina powder as an essential component. Further, in casting an epoxy resin composition, an alumina powder having a predetermined particle size is previously filled in the casting mold, and then the resin component [(A) + (B)] is cast. It is a method of manufacturing cast products.
【０００６】以下、本発明を詳細に説明する。The present invention will be described in detail below.
【０００７】本発明に用いる（Ａ）エポキシ樹脂として
は例えば、ビスフェノールＡジグリシジルエーテル、ビ
スフェノールＦジグリシジルエーテル、ビスフェノール
ＡＤジグリシジルエーテル、ポリカルボン酸のグリシジ
ルエーテル、シクロヘキサン誘導体のエポキシ化によっ
て得られるエポキシ樹脂等、通常使用されるエポキシ樹
脂が広く使用でき、特に限定されるものではない。これ
らのエポキシ樹脂は単独又は 2種以上混合して使用する
ことができる。また、必要に応じて液状のモノエポキシ
樹脂を併用することもできる。Examples of the (A) epoxy resin used in the present invention include bisphenol A diglycidyl ether, bisphenol F diglycidyl ether, bisphenol AD diglycidyl ether, glycidyl ether of polycarboxylic acid, and epoxy obtained by epoxidation of cyclohexane derivative. Epoxy resins that are commonly used, such as resins, can be widely used and are not particularly limited. These epoxy resins can be used alone or in combination of two or more. If necessary, a liquid monoepoxy resin can be used together.
【０００８】本発明に用いる（Ｂ）硬化剤としては、液
状酸無水物を使用することが望ましい。液状酸無水物と
しては例えば、メチルテトラヒドロフタル酸無水物、メ
チルヘキサヒドロフタル酸無水物等が使用される。硬化
剤としては、液状酸無水物を使用することが望ましいが
特に限定されるものではなく、注形品に要求される特性
や目的に応じてアミン化合物、イミダゾール化合物等、
通常エポキシ樹脂の硬化剤として使用されるものを広く
使用することができ、また必要に応じて各種の硬化促進
剤を併用することができる。As the curing agent (B) used in the present invention, it is desirable to use a liquid acid anhydride. As the liquid acid anhydride, for example, methyltetrahydrophthalic acid anhydride, methylhexahydrophthalic acid anhydride or the like is used. As the curing agent, it is desirable to use a liquid acid anhydride, but it is not particularly limited, depending on the properties and purposes required for the cast product, amine compounds, imidazole compounds, etc.,
A wide variety of epoxy resin curing agents can be used, and if necessary, various curing accelerators can be used in combination.
【０００９】本発明に用いる（Ｃ）アルミナ粉末として
は、粒径が 0.5〜3mm のものが望ましい。また、アルミ
ナ粉末の形状は不定形であって上記範囲より粒径の大き
いものや粒径の小さいものを含まず、粒径のそろったも
のが好ましい。粒径が 0.5mm未満や3mm を超えるものを
含むと最密充填と成りやすく、充填材の流動性が損なわ
れ好ましくない。The (C) alumina powder used in the present invention preferably has a particle size of 0.5 to 3 mm. Further, the shape of the alumina powder is preferably amorphous and does not include particles having a particle size larger or smaller than the above range, and those having a uniform particle size are preferable. If the particle size is less than 0.5 mm or more than 3 mm, close packing is likely to occur and the fluidity of the filler is impaired, which is not preferable.
【００１０】本発明に用いるエポキシ樹脂組成物は上述
のエポキシ樹脂、硬化剤、アルミナ粉末を必須成分とす
るが、本発明の目的に反しない範囲において顔料、カッ
プリング剤、消泡剤その他の充填材等を添加配合するこ
とができる。これらの各成分を配合してエポキシ樹脂組
成物を容易に製造することができる。実際の注形品の製
造に際しては、これらの各成分を含むエポキシ樹脂組成
物をつくらずに、各成分の内充填材を除いたエポキシ樹
脂成分をつくっておき、予め注形型に充填材を充填し、
次いでこのエポキシ樹脂成分を注形加熱硬化させて、結
果としてエポキシ樹脂、硬化剤、アルミナ粉末を必須成
分とするエポキシ樹脂組成物からなる注形品を製造する
ものである。The epoxy resin composition used in the present invention contains the above-mentioned epoxy resin, curing agent, and alumina powder as essential components, but pigments, coupling agents, defoaming agents and other fillers are used within the range not deviating from the object of the present invention. Materials and the like can be added and compounded. An epoxy resin composition can be easily manufactured by blending each of these components. When manufacturing an actual cast product, do not make an epoxy resin composition containing each of these components, but make an epoxy resin component excluding the internal filler of each component, and fill the casting mold with the filler in advance. Filling,
Then, this epoxy resin component is cast and heat-cured, and as a result, a cast product made of an epoxy resin composition containing an epoxy resin, a curing agent and alumina powder as essential components is produced.
【００１１】本発明のエポキシ樹脂注形品およびその製
造方法は、電気・電子部品の注形、絶縁、含浸等に好適
なものである。INDUSTRIAL APPLICABILITY The epoxy resin cast product and the method for producing the same according to the present invention are suitable for casting, insulating, impregnating and the like of electric / electronic parts.
【００１２】[0012]
【作用】本発明に用いるエポキシ樹脂組成物は不定形の
所定粒径のアルミナ粉末を用いたことによって、含浸性
の優れたものとすることができた。即ち、不定形で粒径
のそろったアルミナ粉末を用いたことによって、充填材
が最密充填とならずに隙間ができ樹脂の流動性を常に維
持することができる。また、充填材が不定形のため充填
材の粒子間に常に樹脂が通過できる隙間をたもつことが
でき、粒径のそろったものとの相乗効果でさらに含浸性
が向上するものである。最終注形品がこのエポキシ樹脂
組成物と成るようにし、予め注形型に充填材を充填する
ことによって、充填材の高充填が可能となるものであ
る。The epoxy resin composition used in the present invention has excellent impregnating ability by using an amorphous alumina powder having a predetermined particle size. That is, by using the alumina powder having an irregular shape and a uniform particle size, it is possible to always maintain the fluidity of the resin by forming a gap without the packing material being the closest packing. In addition, since the filler has an indeterminate shape, it is possible to form a gap between the particles of the filler that allows the resin to always pass therethrough, and the impregnating property is further improved by the synergistic effect of the filler having a uniform particle size. By making the epoxy resin composition the final casting product and filling the casting mold with the filler in advance, the filler can be highly filled.
【００１３】[0013]
【実施例】次に、本発明を実施例によって説明するが、
本発明はこれらの実施例よって限定されるものではな
い。以下の実施例および比較例において「部」とは「重
量部」を意味する。The present invention will be described below with reference to examples.
The invention is not limited by these examples. In the following examples and comparative examples, "part" means "part by weight".
【００１４】実施例 ビスフェノールＡジグリシジルエーテル 100部、メチル
ヘキサヒドロフタル酸無水物90部、2-エチル-4−メチル
イミダゾール 0.7部、シリコーン消泡剤 0.1部、シラン
カップリング剤 0.5部を加えて均一に混合してエポキシ
樹脂を得た。Example 1 100 parts of bisphenol A diglycidyl ether, 90 parts of methylhexahydrophthalic anhydride, 0.7 part of 2-ethyl-4-methylimidazole, 0.1 part of silicone antifoaming agent and 0.5 part of silane coupling agent were added. The mixture was uniformly mixed to obtain an epoxy resin.
【００１５】ＰＢＴ（ポリブチレンテレフタレート）の
ケースに所定のコイルを設置固定する。次いで、ケース
の中に予め 120℃×1 h 乾燥した、粒径0.5 〜3 mmのア
ルミナ粉末（ＪＩＳＲ６１１１規格＃１６ＷＡ）を充填
した後、前記のエポキシ樹脂を真空注入した。次にこれ
を90℃× 4Ｈ＋ 150℃× 2Ｈの条件で加熱硬化させて、
エポキシ樹脂組成物注形品を製造した。A predetermined coil is installed and fixed in a case of PBT (polybutylene terephthalate). Next, the case was filled with alumina powder (JISR6111 standard # 16WA) having a particle size of 0.5 to 3 mm, which was dried in advance at 120 ° C. for 1 h, and then the epoxy resin was vacuum-injected. Next, heat cure this under the condition of 90 ℃ × 4H + 150 ℃ × 2H,
An epoxy resin composition cast product was produced.
【００１６】比較例１〜７ 実施例において、表１のようにアルミナ粉末の粒径を替
えた以外は実施例と同様にして、エポキシ樹脂およびエ
ポキシ樹脂組成物注形品を製造した。Comparative Examples 1 to 7 Epoxy resins and epoxy resin composition cast products were produced in the same manner as in Examples except that the particle size of the alumina powder was changed as shown in Table 1.
【００１７】[0017]
【表１】 [Table 1]
【００１８】実施例および比較例で製造した注形品を切
断し、断面を研磨しコイル部分への含浸性、および注形
品製造時の充填材の注入のし易さについて評価したので
その結果を表２に示した。本発明の特性が優れており、
本発明の効果を確認することができた。The cast products produced in the examples and comparative examples were cut, and the cross-section was polished to evaluate the impregnating ability of the coil portion and the ease of pouring the filler during the production of the cast products. Is shown in Table 2. The characteristics of the present invention are excellent,
The effect of the present invention could be confirmed.
【００１９】 ＊1 ：○印…流動性良く発塵が少ない、△印…流動性は
良好だが発塵多い、×印…流動性が著しく悪いか又は発
塵が著しく多いかのいずれかである。 ＊2 ：○印…良好、△印…やや良好、×印…含浸せずボ
イド有り。[0019] * 1: ○: Good fluidity with little dust generation, △: Good fluidity but large amount of dust generation, × mark: Remarkably poor fluidity or remarkably large amount of dust generation. * 2: ○: Good, Δ: Somewhat good, ×: Void without impregnation.
【００２０】[0020]
【発明の効果】以上の説明及び表２から明らかなよう
に、本発明の注形品およびその製造方法によれば、充填
材が均一に高充填され、例えばコイル等で含浸性に優れ
た注形品が得られ、電気・電子部品の注形等に好適なも
のである。As is apparent from the above description and Table 2, according to the cast product and the method for producing the same of the present invention, the filling material is uniformly highly filled, and for example, a casting having excellent impregnation property in a coil or the like. A shaped product is obtained, which is suitable for casting electric and electronic parts.
Claims (2)
び（Ｃ）不定形であって粒径が 0.5〜3mm のアルミナ粉
末を必須成分とするエポキシ樹脂組成物で注形硬化され
てなることを特徴とするエポキシ樹脂注形品。1. An epoxy resin composition comprising (A) an epoxy resin, (B) a curing agent, and (C) an amorphous alumina powder having a particle size of 0.5 to 3 mm as an essential component, which is cast and cured. Epoxy resin cast product characterized by
び（Ｃ）不定形であって粒径が 0.5〜3mm のアルミナ粉
末を必須成分とするエポキシ樹脂組成物の注形に際し
て、前記（Ｃ）のアルミナ粉末を予め注形型に充填した
後、前記樹脂成分［（Ａ）＋（Ｂ）］を注形することを
特徴とするエポキシ樹脂注形品の製造方法。2. When casting an epoxy resin composition containing (A) an epoxy resin, (B) a curing agent, and (C) an alumina powder having an amorphous particle size of 0.5 to 3 mm as an essential component, A method for producing an epoxy resin cast product, which comprises casting the alumina powder of C) in a casting mold in advance and then casting the resin component [(A) + (B)].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29739593A JP3470912B2 (en) | 1993-11-02 | 1993-11-02 | Epoxy resin casting and manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29739593A JP3470912B2 (en) | 1993-11-02 | 1993-11-02 | Epoxy resin casting and manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07126493A true JPH07126493A (en) | 1995-05-16 |
| JP3470912B2 JP3470912B2 (en) | 2003-11-25 |
Family
ID=17845941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29739593A Expired - Fee Related JP3470912B2 (en) | 1993-11-02 | 1993-11-02 | Epoxy resin casting and manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3470912B2 (en) |
-
1993
- 1993-11-02 JP JP29739593A patent/JP3470912B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP3470912B2 (en) | 2003-11-25 |
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