JP2612021B2 - Electrolyte for driving electrolytic capacitors - Google Patents
Electrolyte for driving electrolytic capacitorsInfo
- Publication number
- JP2612021B2 JP2612021B2 JP4563688A JP4563688A JP2612021B2 JP 2612021 B2 JP2612021 B2 JP 2612021B2 JP 4563688 A JP4563688 A JP 4563688A JP 4563688 A JP4563688 A JP 4563688A JP 2612021 B2 JP2612021 B2 JP 2612021B2
- Authority
- JP
- Japan
- Prior art keywords
- electrolyte
- nitroanisole
- amino
- electrolytic solution
- electrolytic capacitors
- 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.)
- Expired - Fee Related
Links
Landscapes
- Detergent Compositions (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、電解コンデンサをハロゲン化炭化水素で洗
浄した場合にコンデンサ内部にハロゲン化炭化水素が透
過して生ずるコンデンサ素子の腐食を防止し、寿命特性
を向上できる中高圧用電解コンデンサの駆動用電解液
（以下電解液という）に関するものである。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention prevents corrosion of a capacitor element caused by permeation of a halogenated hydrocarbon into the interior of an electrolytic capacitor when the electrolytic capacitor is washed with the halogenated hydrocarbon, and has a life characteristic. The present invention relates to an electrolytic solution for driving a medium-to-high pressure electrolytic capacitor (hereinafter, referred to as an electrolytic solution) which can improve the performance.
従来の技術 従来よりアルミニウム電解コンデンサの電解液として
エチレングリコールを主溶媒とし、ほう酸および有機酸
あるいはその塩を溶解してなる電解液が使用されてい
る。またハロゲン化炭化水素による腐食防止を目的とし
て、ニトロフェノールあるいはニトロ安息香酸を添加し
たものが用いられていた。2. Description of the Related Art Conventionally, an electrolytic solution obtained by dissolving boric acid and an organic acid or a salt thereof using ethylene glycol as a main solvent has been used as an electrolytic solution for an aluminum electrolytic capacitor. Further, for the purpose of preventing corrosion by halogenated hydrocarbons, those added with nitrophenol or nitrobenzoic acid have been used.
発明が解決しようとする問題点 アルミニウム電解コンデンサに対しては、洗浄工程
や、印刷基板へ取り付けする時に用いるハンダフラック
スの除去工程で、洗浄剤として使用されるハロゲン化炭
化水素への浸漬あるいは蒸気浴などによって、このハロ
ゲン化炭化水素がゴム栓を透過してコンデンサ内に侵入
し、分解して塩素イオンを生成し、この塩素イオンによ
ってコンデンサ素子を腐食させることがあった。Problems to be Solved by the Invention For aluminum electrolytic capacitors, immersion in a halogenated hydrocarbon used as a cleaning agent or a steam bath in a cleaning step or a step of removing solder flux used when attaching to a printed circuit board. In some cases, the halogenated hydrocarbons penetrate the rubber stopper and enter the capacitor, decompose to generate chlorine ions, and the chlorine ions corrode the capacitor element.
そこで、ハロゲン化炭化水素による腐食防止を目的と
してニトロフェノールあるいはニトロ安息香酸を添加し
ていたが、それらの添加は火花発生電圧の低下をもたら
すため、低圧（100WV以下）用に限定されていた。Therefore, nitrophenol or nitrobenzoic acid has been added for the purpose of preventing corrosion by halogenated hydrocarbons. However, since addition of these compounds causes a reduction in spark generation voltage, they have been limited to low pressure (100 WV or less).
問題点を解決するための手段 本発明は、上述の問題点を解決するもので、従来の電
解液から得られる優れた特性を損なうことなく、電解コ
ンデンサにも洗浄工程を取り入れることが可能な中高圧
用電解液を提供するものである。すなわち、エチレング
リコールを主溶媒とし、ほう酸および有機酸あるいはそ
の塩を溶解してなる電解液に0.5重量％以上のアミノ−
ニトロアニソールを添加して溶解したことを特徴とする
電解液である。Means for Solving the Problems The present invention solves the above-described problems, and it is possible to incorporate a washing step into an electrolytic capacitor without impairing the excellent characteristics obtained from the conventional electrolytic solution. It is intended to provide a high-pressure electrolyte. That is, 0.5% by weight or more of an amino-
An electrolytic solution characterized by adding and dissolving nitroanisole.
尚、上記アミノ−ニトロアニソールとして、４−アミ
ノ−３−ニトロアニソール、２−アミノ−４−ニトロア
ニソール、２−アミノ−５−ニトロアニソールを用いる
ことができる。In addition, as said amino-nitroanisole, 4-amino-3-nitroanisole, 2-amino-4-nitroanisole, and 2-amino-5-nitroanisole can be used.
作用 本発明の電解液は、中高圧用アルミニウム電解コンデ
ンサにおいて、洗浄剤として使用されるハロゲン化炭化
水素がコンデンサケース内に侵入しても、添加したニト
ロ化合物の分解抑制作用により塩素イオンの遊離を防止
し、電解液の塩素イオン濃度の増加を防止し、アルミニ
ウム電極の腐食を防止する。The electrolytic solution of the present invention is capable of preventing chloride ions from being liberated by suppressing the decomposition of added nitro compounds even when halogenated hydrocarbons used as a cleaning agent enter a capacitor case in a medium-to-high pressure aluminum electrolytic capacitor. To prevent an increase in the chloride ion concentration of the electrolyte and prevent corrosion of the aluminum electrode.
実施例 以下、本発明の実施例について説明する。Examples Hereinafter, examples of the present invention will be described.
第１表は、本発明と従来の電解コンデンサに用いた電
解液の組成、比抵抗についての比較例を示す。第１表中
電解液試料記号Ａ、Ｂ、Ｃは従来例、Ｄ、Ｅ、Ｆ、Ｇ、
Ｈは本発明例である。Table 1 shows a comparative example of the composition and specific resistance of the electrolytic solution used in the present invention and the conventional electrolytic capacitor. The electrolyte sample symbols A, B, and C in Table 1 are conventional examples, and D, E, F, G,
H is an example of the present invention.
第２表は、第１表の電解液を用いて定格250WV 220μ
Ｆのアルミニウム電解コンデンサを試作し１、１、１−
トリクロロエタンに浸漬した後、105℃2000時間の高温
負荷試験を行った結果を示す。 Table 2 is rated 250WV 220μ using the electrolyte of Table 1.
Prototype aluminum electrolytic capacitor of F
The result of performing a high-temperature load test at 105 ° C. for 2,000 hours after immersion in trichloroethane is shown.
本発明に係る電解液試料記号Ｄ、Ｅ、Ｆ、Ｇ、Ｈの電
解液を用いたものは、上述の洗浄液がコンデンサ素子内
に侵入しても、高温負荷試験において腐食発生がなく、
全ての特性に問題なく改良効果が得られている。 The electrolyte using the electrolyte samples D, E, F, G, and H according to the present invention does not cause corrosion in the high-temperature load test even if the above-mentioned cleaning solution enters the capacitor element.
The improvement effect was obtained without any problem in all characteristics.
またアミノ−ニトロアニソールの添加量は0.5重量％
以上が好ましく、添加量が飽和濃度を超えることは好ま
しくない。なお、0.5重量％未満では、腐食防止効果が
不十分である。The amount of amino-nitroanisole added is 0.5% by weight.
The above is preferable, and it is not preferable that the amount added exceeds the saturation concentration. If the amount is less than 0.5% by weight, the effect of preventing corrosion is insufficient.
発明の効果 以上のように、本発明のエチレングリコールを主溶媒
とし、ほう酸および有機酸あるいはその塩を溶解してな
る電解液に0.5重量％以上の４−アミノ−３−ニトロア
ニソール、２−アミノ−４−ニトロアニソール、２−ア
ミノ−５−ニトロアニソールなどのアミノ−ニトロアニ
ソールを添加して溶解したことを特徴とする電解液を使
用したアルミニウム電解コンデンサは洗浄剤に耐え、信
頼性が極めて高く、コスト面でも有利となり、工業的な
らびに実用的価値の大なるものである。Effects of the Invention As described above, 0.5% by weight or more of 4-amino-3-nitroanisole and 2-amino Aluminum electrolytic capacitors using an electrolytic solution characterized by adding and dissolving amino-nitroanisole such as -4-nitroanisole and 2-amino-5-nitroanisole withstand cleaning agents and have extremely high reliability. It is also advantageous in terms of cost and has great industrial and practical value.
Claims (1)
および有機酸あるいはその塩を溶解してなる電解液に0.
5重量％以上のアミノ−ニトロアニソールを添加して溶
解したことを特徴とする電解コンデンサの駆動用電解
液。1. An electrolytic solution comprising ethylene glycol as a main solvent and boric acid and an organic acid or a salt thereof dissolved therein.
An electrolytic solution for driving an electrolytic capacitor, wherein at least 5% by weight of amino-nitroanisole is added and dissolved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4563688A JP2612021B2 (en) | 1988-02-26 | 1988-02-26 | Electrolyte for driving electrolytic capacitors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4563688A JP2612021B2 (en) | 1988-02-26 | 1988-02-26 | Electrolyte for driving electrolytic capacitors |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01220425A JPH01220425A (en) | 1989-09-04 |
| JP2612021B2 true JP2612021B2 (en) | 1997-05-21 |
Family
ID=12724850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4563688A Expired - Fee Related JP2612021B2 (en) | 1988-02-26 | 1988-02-26 | Electrolyte for driving electrolytic capacitors |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2612021B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0658869B2 (en) * | 1989-08-09 | 1994-08-03 | 信英通信工業株式会社 | Electrolytic solution for driving electrolytic capacitors |
-
1988
- 1988-02-26 JP JP4563688A patent/JP2612021B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01220425A (en) | 1989-09-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |