JPH06305258A - Epoxy resin composition suitable for laser printing - Google Patents
Epoxy resin composition suitable for laser printingInfo
- Publication number
- JPH06305258A JPH06305258A JP5094570A JP9457093A JPH06305258A JP H06305258 A JPH06305258 A JP H06305258A JP 5094570 A JP5094570 A JP 5094570A JP 9457093 A JP9457093 A JP 9457093A JP H06305258 A JPH06305258 A JP H06305258A
- Authority
- JP
- Japan
- Prior art keywords
- epoxy resin
- resin composition
- nickel
- lactate
- nickel lactate
- 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
Landscapes
- Thermal Transfer Or Thermal Recording In General (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、電気・電子部品の絶縁
被覆に用いられ、レーザーの照射によりその絶縁被覆表
面に鮮明な印字を施すことのできるレーザー印字に適し
たエポキシ樹脂組成物に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an epoxy resin composition suitable for laser printing, which is used for insulating coating of electric / electronic parts and is capable of sharply marking the surface of the insulating coating by laser irradiation. Is.
【0002】[0002]
【従来の技術】従来から、エポキシ樹脂組成物により絶
縁被覆された電気・電子部品に特性や型番を明示するた
めの印字を施す際、熱硬化性や紫外線硬化性のインクが
用いられてきたが、工程の合理化を目的としてより短時
間で印字できる方法が要求され始めた。この対応方法の
1つとして、レーザーの照射による印字システムが注目
されている。このレーザー印字システムは、文字やパタ
ーン状にレーザーを照射された部分が熱エネルギーによ
り変色する、あるいは照射された部分が昇華し表面粗化
され、光の散乱によって文字やパターンが識別できると
いうものである。この方法の印字時間は0.01秒以下
であり、従来の熱あるいは紫外線硬化性のインクが硬化
に数分〜数10分を必要とするのに比べ、大幅に短縮さ
れる。しかし、従来のエポキシ樹脂組成物の絶縁被覆に
レーザーを照射した場合、単に被覆表面を粗化するのみ
で変色がおこらず、鮮明な文字やパターンを印字するこ
とができなかった。2. Description of the Related Art Conventionally, a thermosetting ink or an ultraviolet curable ink has been used for printing on an electric / electronic component insulating-coated with an epoxy resin composition to clearly indicate a characteristic or a model number. However, there has been a demand for a method that can print in a shorter time for the purpose of streamlining the process. As one of the countermeasures against this, a printing system using laser irradiation is drawing attention. In this laser printing system, the part irradiated with laser in the form of letters or patterns is discolored by thermal energy, or the part exposed is sublimed and surface roughened, and letters or patterns can be identified by scattering of light. is there. The printing time of this method is 0.01 second or less, which is significantly shorter than the conventional heat-curable or ultraviolet-curable ink which requires several minutes to several tens of minutes for curing. However, when the insulating coating of the conventional epoxy resin composition is irradiated with a laser, discoloration does not occur simply by roughening the coating surface, and clear characters or patterns cannot be printed.
【0003】最近、従来のエポキシ樹脂組成物に黄色の
水酸化第二鉄を含有させるとレーザー照射によって黄色
から褐色に変色することが見い出された(特開昭62−
50360号公報)。しかし、水酸化第二鉄は黄色であ
るため黄や橙色のような色相にしか用いることができ
ず、青や緑色の下地、特に淡色系の下地に黒色のレーザ
ー印字を施すことがこれからの課題とされてきた。Recently, it has been found that when a conventional epoxy resin composition contains yellow ferric hydroxide, it is discolored from yellow to brown by laser irradiation (JP-A-62-62).
50360). However, since ferric hydroxide is yellow, it can be used only for hues such as yellow and orange, and it is a future task to apply black laser printing to blue or green substrates, especially light-colored substrates. Has been said.
【0004】[0004]
【発明が解決しようとする課題】本発明は、従来不可能
であった青や緑の明色からレーザーにより黒色に変色す
る樹脂組成物を得んとして鋭意検討した結果、乳酸ニッ
ケル(II)を含有させるとレーザーを照射した際淡緑色
から黒色に変色することを見出し、更にこの知見に基づ
き種々研究を進めて完成するに至ったものである。本発
明の目的とするところは電気的特性および他の諸特性を
低下させることなく、レーザーの照射により樹脂表面に
鮮明な印字を施すことのできる硬化物を与えるエポキシ
樹脂組成物を提供することにある。DISCLOSURE OF THE INVENTION In the present invention, as a result of earnestly studying to obtain a resin composition in which a blue or green bright color, which has been impossible in the past, is discolored into a black color by a laser is studied, nickel (II) lactate It has been found that when it is contained, it changes color from light green to black when irradiated with a laser, and based on this finding, various studies have been advanced to complete the present invention. An object of the present invention is to provide an epoxy resin composition which gives a cured product capable of sharply marking a resin surface by laser irradiation without deteriorating electrical properties and other properties. is there.
【0005】[0005]
【課題を解決するための手段】本発明は乳酸ニッケル
(II)を含有することを特徴とするレーザー印字に適し
たエポキシ樹脂組成物に関するものである。本発明のエ
ポキシ樹脂組成物に乳酸ニッケル(II)を用いる理由を以
下述べる。乳酸ニッケル(II)は淡緑色の粉末であり、
加熱すると200〜300℃で分解して酸化ニッケル
(II)に変化することによって黒色となる。従って、乳
酸ニッケル(II)を含有したエポキシ樹脂組成物に対し文
字やパターン状にレーザーを照射すると、樹脂表面がレ
ーザーの熱エネルギーにより加熱され、樹脂中に含有さ
れた乳酸ニッケル(II)が上記化学反応を生じ黒色とな
る。すなわち、レーザーに照射された部分のみ黒色とな
り、照射されない部分は淡緑色のままのため淡緑色の下
地に黒色の文字やパターンを鮮明に印字することができ
る。SUMMARY OF THE INVENTION The present invention relates to an epoxy resin composition suitable for laser printing, which contains nickel (II) lactate. The reason why nickel (II) lactate is used in the epoxy resin composition of the present invention will be described below. Nickel (II) lactate is a light green powder,
When heated, it decomposes at 200 to 300 ° C. and changes into nickel (II) oxide, resulting in a black color. Therefore, when the epoxy resin composition containing nickel (II) lactate is irradiated with a laser in a letter or pattern, the resin surface is heated by the thermal energy of the laser, and the nickel (II) lactate contained in the resin is A chemical reaction occurs that turns black. That is, only the portion irradiated by the laser becomes black, and the non-irradiated portion remains light green, so that black characters and patterns can be clearly printed on the light green substrate.
【0006】本発明に用いられる乳酸ニッケル(II)の
粒度は平均粒径が100μm以下であることが好まし
い。その理由は、エポキシ樹脂組成物に乳酸ニッケル
(II)を混合分散させると100μm以上の平均粒径で
は電子・電気部品に被覆させた際表面が斑点状となり、
部品の商品価値を低下鎖せるばかりでなく分散が不十分
となりやすく、レーザーが照射されたとき乳酸ニッケル
(II)が存在しない部分では変色がおこらずに文字やパ
ターンがとぎれて鮮明な印字ができなくなる場合があ
る。なお、この平均粒径はコールターカウンター(日科
機製)により得られる粒度分布を重量平均することによ
り求めるのが適当であるが、コールターカウンター以外
の測定方法により求めてもよい。乳酸ニッケル(II)の
含有量は0.5〜20重量%が好ましい。この理由は含
有量が0.5重量%以下ではレーザーが照射されても変
色する度合が小さいため鮮明な印字とならず、逆に20
重量%を超えると樹脂組成物の電気絶縁性が低下し、電
子部品用絶縁材料としての本来の性能を満足しにくくな
るためである。The nickel (II) lactate used in the present invention preferably has an average particle size of 100 μm or less. The reason for this is that when nickel (II) lactate is mixed and dispersed in an epoxy resin composition, the surface becomes speckled when coated on electronic / electrical parts with an average particle size of 100 μm or more,
Not only the commercial value of the parts is reduced, but also the dispersion is likely to be insufficient, and when the laser is irradiated, discoloration does not occur in the part where nickel lactate (II) does not exist, and characters and patterns are interrupted, making clear printing possible. It may disappear. The average particle size is appropriately determined by weight-averaging the particle size distribution obtained by a Coulter counter (manufactured by Nikkaki Co., Ltd.), but may be determined by a measuring method other than the Coulter counter. The content of nickel (II) lactate is preferably 0.5 to 20% by weight. The reason for this is that if the content is 0.5% by weight or less, the degree of discoloration is small even when irradiated with laser, so that clear printing cannot be performed, and conversely 20
This is because if the content exceeds 5% by weight, the electrical insulation of the resin composition deteriorates, and it becomes difficult to satisfy the original performance as an insulating material for electronic parts.
【0007】本発明に用いられるエポキシ樹脂として
は、例えばビスフェノールA型エポキシ樹脂、ビスフェ
ノールF型エポキシ樹脂等のジグリシジルエーテル型エ
ポキシ樹脂、フェノールノボラック型エポキシ樹脂、ク
レゾールノボラック型エポキシ樹脂等のノボラック型エ
ポキシ樹脂、グリシジルエステル型エポキシ樹脂、グリ
シジルアミン型エポキシ樹脂、鎖状脂肪族型エポキシ樹
脂、複素環型エポキシ樹脂、ハロゲン化エポキシ樹脂等
が挙げられるが、これらに限定されるものではない。本
発明に用いられる硬化剤および硬化促進剤としては酸無
水物、ポリアミン、ノボラック型フェノール樹脂、第3
級アミン、イミダゾール化合物等があるが、いずれを用
いてもよい。また、必要により公知の無機充填剤たとえ
ばジルコン粉末、タルク粉末、結晶シリカ粉末、溶融シ
リカ粉末、炭酸カルシウム粉末、マグネシア粉末、ケイ
酸カルシウム粉末、水和アルミナ粉末、アルミナ粉末等
を配合してもよい。Examples of the epoxy resin used in the present invention include diglycidyl ether type epoxy resins such as bisphenol A type epoxy resins and bisphenol F type epoxy resins, phenol novolac type epoxy resins, and novolac type epoxy resins such as cresol novolac type epoxy resins. Examples of the resin include, but are not limited to, resins, glycidyl ester type epoxy resins, glycidyl amine type epoxy resins, chain aliphatic type epoxy resins, heterocyclic type epoxy resins and halogenated epoxy resins. Examples of the curing agent and curing accelerator used in the present invention include acid anhydrides, polyamines, novolac type phenolic resins, and
Although there are primary amines, imidazole compounds, etc., any of them may be used. If necessary, known inorganic fillers such as zircon powder, talc powder, crystalline silica powder, fused silica powder, calcium carbonate powder, magnesia powder, calcium silicate powder, hydrated alumina powder, and alumina powder may be added. .
【0008】本発明により得られる樹脂組成物は乳酸ニ
ッケル(II)の色調により通常淡黄色を呈するが、赤、
青、緑、黒、白色等の顔料を併用してもよい。本発明の
樹脂組成物は注型材料等の液状、粉体塗料等の粉状、成
型材料等の顆粒状、塊状等いずれの状態でもよい。本発
明の樹脂組成物を製造する方法としては例えば粉体塗料
の場合を上げると、所定の割合で秤量した原料成分をミ
キサーによって十分混合した後、エキストルーダー、コ
ニーダーあるいはロール等で溶融混練し、次いで粉砕機
にて粉砕する方法等がある。上記方法により得られた粉
体塗料により電子・電気部品の絶縁被覆を行う方法とし
ては流動浸漬法、静電流動浸漬法、ころがし法、ふりか
け法、ホットスプレー法、静電スプレー法等一般の粉体
塗装方法がある。また、注型材料、成型材料の場合につ
いても公知の技術で製造でき、絶縁材料として使用でき
る。The resin composition obtained according to the present invention usually has a pale yellow color due to the color tone of nickel (II) lactate, but has a red color.
Pigments such as blue, green, black and white may be used together. The resin composition of the present invention may be in any state such as liquid such as casting material, powder such as powder coating material, granule such as molding material and lump. As a method for producing the resin composition of the present invention, for example, when raising the case of powder coating, after thoroughly mixing the raw material components weighed in a predetermined ratio with a mixer, melt kneading with an extruder, a cokneader or a roll, Then, there is a method of crushing with a crusher. As a method for performing insulation coating of electronic / electrical components with the powder coating obtained by the above method, a fluid immersion method, an electrostatic fluid immersion method, a rolling method, a sprinkling method, a hot spray method, an electrostatic spray method, or another general powder. There is a body painting method. Also, in the case of a casting material or a molding material, it can be manufactured by a known technique and can be used as an insulating material.
【0009】[0009]
【実施例】次に本発明を実施例により更に詳しく説明す
る。 《実施例1》 ビスフェノールA型エポキシ樹脂(エポキシ当量950) 50重量部 乳酸ニッケル(II)(平均粒径20μm) 5重量部 結晶シリカ粉末 50重量部 2−メチルイミダゾール 1重量部 上記組成物を配合し、ヘンシェルミキサーでブレンド
し、コニーダーにて溶融混練した後、粉砕機で粉砕する
ことにより平均粒径60〜70μmのエポキシ樹脂組成
物の粉体塗料を得た。EXAMPLES Next, the present invention will be described in more detail by way of examples. << Example 1 >> Bisphenol A type epoxy resin (epoxy equivalent 950) 50 parts by weight Nickel (II) lactate (average particle size 20 μm) 5 parts by weight Crystalline silica powder 50 parts by weight 2-Methylimidazole 1 part by weight The above composition is blended. Then, they were blended with a Henschel mixer, melt-kneaded with a kneader, and then pulverized with a pulverizer to obtain a powder coating material of an epoxy resin composition having an average particle diameter of 60 to 70 μm.
【0010】《実施例2》実施例1において、乳酸ニッ
ケル(II)の添加量を20重量部に替え、他は同様にし
て平均粒径60〜70μmのエポキシ樹脂組成物の粉体
塗料を得た。 《比較例1》実施例1において、乳酸ニッケル(II)の
添加量を0.1重量部に替え、他は同様にして平均粒径
60〜70μmのエポキシ樹脂組成物の粉体塗料を得
た。 《比較例2》実施例1において、乳酸ニッケル(II)の
添加量を50重量部に替え、他は同様にして平均粒径6
0〜70μmのエポキシ樹脂組成物の粉体塗料を得た。Example 2 A powder coating of an epoxy resin composition having an average particle size of 60 to 70 μm was obtained in the same manner as in Example 1, except that the amount of nickel (II) lactate added was changed to 20 parts by weight. It was << Comparative Example 1 >> A powder coating material of an epoxy resin composition having an average particle diameter of 60 to 70 μm was obtained in the same manner as in Example 1, except that the addition amount of nickel (II) lactate was changed to 0.1 part by weight. . << Comparative Example 2 >> In Example 1, the addition amount of nickel (II) lactate was changed to 50 parts by weight, and the average particle size was 6
A powder coating material of the epoxy resin composition having a thickness of 0 to 70 μm was obtained.
【0011】実施例1、2及び比較例1、2の樹脂組成
物について硬化物を作製した。この試料に炭酸ガスレー
ザー(ウシオ電気製 400型レーザーマーク、エネルギ
ー 6Joule)を用いて、100万分の1秒間所定のマス
クを通してレーザー照射し、硬化物表面にマーキングを
施した。また、上記硬化物の絶縁破壊電圧をJIS K
6911により測定した。結果を表1に示す。Cured products were prepared from the resin compositions of Examples 1 and 2 and Comparative Examples 1 and 2. A carbon dioxide gas laser (400 type laser mark manufactured by Ushio Denki Co., Ltd., energy: 6 Joule) was applied to this sample by laser irradiation through a predetermined mask for 1,000,000th of a second to mark the surface of the cured product. In addition, the dielectric breakdown voltage of the cured product is measured according to JIS K
6911. The results are shown in Table 1.
【0012】[0012]
【表1】 [Table 1]
【0013】[0013]
【発明の効果】本発明のレーザー印字に適したエポキシ
樹脂組成物を絶縁被覆材として用いると、電気的特性お
よび他の特性を低下させることなくレーザーの照射によ
り樹脂表面に鮮明な印字を施すことのできる被覆を与え
ることができる。従って、従来より非常に短時間で印字
できるため電気・電子部品の生産工程の合理化をはかる
ことができる。When the epoxy resin composition suitable for laser marking of the present invention is used as an insulating coating material, a sharp marking can be made on the resin surface by laser irradiation without deteriorating the electrical characteristics and other characteristics. It is possible to provide a coating capable of Therefore, since printing can be performed in a much shorter time than in the past, the production process of electric / electronic parts can be rationalized.
Claims (3)
なるエポキシ樹脂組成物において、乳酸ニッケル(II)
を含有することを特徴とするエポキシ樹脂組成物。1. An epoxy resin composition comprising an epoxy resin, a curing agent, a filler, etc., wherein nickel (II) lactate is used.
An epoxy resin composition comprising:
μm以下であることを特徴とする請求項1記載のエポキ
シ樹脂組成物。2. The average particle size of nickel (II) lactate is 100.
The epoxy resin composition according to claim 1, which has a thickness of not more than μm.
0.5〜20重量部含有することを特徴とする請求項1
又は2記載のエポキシ樹脂組成物。3. The nickel (II) lactate is contained in an amount of 0.5 to 20 parts by weight based on the composition.
Or the epoxy resin composition according to 2.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5094570A JPH06305258A (en) | 1993-04-21 | 1993-04-21 | Epoxy resin composition suitable for laser printing |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5094570A JPH06305258A (en) | 1993-04-21 | 1993-04-21 | Epoxy resin composition suitable for laser printing |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH06305258A true JPH06305258A (en) | 1994-11-01 |
Family
ID=14113973
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5094570A Pending JPH06305258A (en) | 1993-04-21 | 1993-04-21 | Epoxy resin composition suitable for laser printing |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH06305258A (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0452190A (en) * | 1990-06-19 | 1992-02-20 | Dainippon Ink & Chem Inc | Laser marking method and resin composing material for laser marking |
JPH04131273A (en) * | 1990-09-25 | 1992-05-01 | Dainippon Ink & Chem Inc | Laser marking method and resin composition for laser marking |
JPH04183741A (en) * | 1990-11-16 | 1992-06-30 | Sumitomo Bakelite Co Ltd | Epoxy resin composition suitable for laser printing |
-
1993
- 1993-04-21 JP JP5094570A patent/JPH06305258A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0452190A (en) * | 1990-06-19 | 1992-02-20 | Dainippon Ink & Chem Inc | Laser marking method and resin composing material for laser marking |
JPH04131273A (en) * | 1990-09-25 | 1992-05-01 | Dainippon Ink & Chem Inc | Laser marking method and resin composition for laser marking |
JPH04183741A (en) * | 1990-11-16 | 1992-06-30 | Sumitomo Bakelite Co Ltd | Epoxy resin composition suitable for laser printing |
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