JPH0722088B2 - Electrolytic solution for electrolytic capacitors - Google Patents
Electrolytic solution for electrolytic capacitorsInfo
- Publication number
- JPH0722088B2 JPH0722088B2 JP23630088A JP23630088A JPH0722088B2 JP H0722088 B2 JPH0722088 B2 JP H0722088B2 JP 23630088 A JP23630088 A JP 23630088A JP 23630088 A JP23630088 A JP 23630088A JP H0722088 B2 JPH0722088 B2 JP H0722088B2
- Authority
- JP
- Japan
- Prior art keywords
- electrolytic solution
- electrolytic
- ether type
- type polyol
- polyvinyl alcohol
- 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 - Lifetime
Links
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 この発明は耐電圧特性に優れた電解コンデンサ用電解液
に関する。TECHNICAL FIELD The present invention relates to an electrolytic solution for an electrolytic capacitor having excellent withstand voltage characteristics.
従来の技術 アルミ電解コンデンサは、陽極酸化皮膜の厚さと電解液
の耐圧とが使用電圧に耐えられるように決めている。そ
のため、高圧用のアルミ電解コンデンサを製作する上で
電解液の耐圧を向上させることは重要なテーマである。
従って高耐圧の電解液を得るための溶媒や添加物の検討
が行われている。この中で電解液の耐圧を高める手段と
してポリビニアルコールとホウ酸を添加した電解液が特
開昭60−91618号として公知である。2. Description of the Related Art In an aluminum electrolytic capacitor, the thickness of the anodized film and the withstand voltage of the electrolytic solution are determined so that they can withstand the working voltage. Therefore, it is an important theme to improve the withstand voltage of the electrolytic solution in manufacturing an aluminum electrolytic capacitor for high voltage.
Therefore, studies have been conducted on solvents and additives for obtaining a high-voltage electrolyte. Among them, an electrolytic solution to which polyvinyl alcohol and boric acid are added is known as JP-A-60-91618 as means for increasing the pressure resistance of the electrolytic solution.
発明が解決しようとする課題 電解液として用いられるポリビニルアルコールは、水に
対しては優れた溶解性を示すが、多価アルコール等の有
機溶媒には溶解能が低い欠点を有している。ポリビニル
アルコールを溶解させる手段として溶媒の温度を極度に
高め、激しい撹拌を行わねばならず作業性が悪かった。Problems to be Solved by the Invention Polyvinyl alcohol used as an electrolytic solution has excellent solubility in water, but has a drawback that it has a low solubility in organic solvents such as polyhydric alcohols. As a means for dissolving polyvinyl alcohol, the temperature of the solvent has to be extremely raised and vigorous stirring has to be performed, resulting in poor workability.
課題を解決するための手段 この発明の電解コンデンサの電解液は、エチレングリコ
ール、ジエチレングリコール、グリセリン等の多価アル
コールとエーテル型のポリオールとの混合溶媒からなる
電解液に対し、部分ケン化ポリビニアルコールとホウ酸
アンモニウムとを添加したものを提供する。Means for Solving the Problems The electrolytic solution of the electrolytic capacitor of the present invention is a partially saponified polyvinyl alcohol for an electrolytic solution composed of a mixed solvent of a polyhydric alcohol such as ethylene glycol, diethylene glycol and glycerin and an ether type polyol. And ammonium borate are added.
エーテル型のポリオールはプロピレングリコールとプロ
ピレンオキシドの付加重合体（以下物質Ａという）やグ
リセリンとプロピレンオキシドの付加重合体（以下物質
Ｂという）を含む。The ether type polyol includes an addition polymer of propylene glycol and propylene oxide (hereinafter referred to as substance A) and an addition polymer of glycerin and propylene oxide (hereinafter referred to as substance B).
物質Ａの構造式は 物質Ｂの構造式は である。The structural formula of substance A is The structural formula of substance B is Is.
作用 本発明は、多価アルコールとエーテル型ポリオールとの
混合溶媒を用いることにより耐圧向上が可能になり、さ
らに溶解性が良好な部分ケン化ポリビニアルコールとホ
ウ酸アンモニウムを添加することにより耐圧特性に優れ
た電解液を得ることができる。Action The present invention makes it possible to improve the pressure resistance by using a mixed solvent of a polyhydric alcohol and an ether type polyol, and by further adding a partially-saponified polyvinyl alcohol having good solubility and ammonium borate, pressure resistance characteristics can be improved. An excellent electrolytic solution can be obtained.
実施例 表１に従来例1,2と本発明の実施例１〜４の組成、濃度
（重量％）及び火花電圧を記載する。Examples Table 1 shows the compositions, concentrations (% by weight) and spark voltage of Conventional Examples 1 and 2 and Examples 1 to 4 of the present invention.
表１によると、多価アルコールとエーテル型のポリオー
ルとの混合溶媒に部分ケン対化ポリビニルアルコールと
ホウ酸アンモニウムを添加した本発明の実施例は従来例
と比して、耐圧特性が大きく改善され参考例との比較に
おいても耐圧向上が認められる。このことからエーテル
型のポリオールのみによっても耐圧特性が向上すること
がわかる。 According to Table 1, the examples of the present invention in which partially saponified polyvinyl alcohol and ammonium borate are added to a mixed solvent of a polyhydric alcohol and an ether type polyol are significantly improved in pressure resistance characteristics as compared with the conventional example. The breakdown voltage is also improved in comparison with the reference example. From this, it is understood that the pressure resistance characteristics are improved only by the ether type polyol.
発明の効果 本発明は以上に説明した如き構成の電解液であって、従
来の電解液に対し、本発明は耐圧特性が向上する電解液
が提供できた。EFFECTS OF THE INVENTION The present invention provides an electrolytic solution having the above-described structure, and the present invention can provide an electrolytic solution having improved pressure resistance characteristics as compared with a conventional electrolytic solution.
Claims (2)
との混合溶媒からなる電解液に対して、部分ケン化ポリ
ビニルアルコールとホウ酸アンモニウムとを添加するこ
とを特徴とする電解コンデンサ用電解液。1. An electrolytic solution for an electrolytic capacitor, wherein a partially saponified polyvinyl alcohol and ammonium borate are added to an electrolytic solution composed of a mixed solvent of a polyhydric alcohol and an ether type polyol.
オールがプロピレングリコールとプロピレンオキシドの
付加重合体である電解コンデンサ用電解液。2. The electrolytic solution for an electrolytic capacitor according to claim 1, wherein the ether type polyol is an addition polymer of propylene glycol and propylene oxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23630088A JPH0722088B2 (en) | 1988-09-22 | 1988-09-22 | Electrolytic solution for electrolytic capacitors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23630088A JPH0722088B2 (en) | 1988-09-22 | 1988-09-22 | Electrolytic solution for electrolytic capacitors |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0286113A JPH0286113A (en) | 1990-03-27 |
| JPH0722088B2 true JPH0722088B2 (en) | 1995-03-08 |
Family
ID=16998752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23630088A Expired - Lifetime JPH0722088B2 (en) | 1988-09-22 | 1988-09-22 | Electrolytic solution for electrolytic capacitors |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0722088B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3705864B2 (en) * | 1996-05-09 | 2005-10-12 | ニチコン株式会社 | Electrolytic solution for electrolytic capacitor drive |
-
1988
- 1988-09-22 JP JP23630088A patent/JPH0722088B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0286113A (en) | 1990-03-27 |
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