JPH0286113A - Electrolyte for electrolytic capacitor - Google Patents

Electrolyte for electrolytic capacitor

Info

Publication number
JPH0286113A
JPH0286113A JP23630088A JP23630088A JPH0286113A JP H0286113 A JPH0286113 A JP H0286113A JP 23630088 A JP23630088 A JP 23630088A JP 23630088 A JP23630088 A JP 23630088A JP H0286113 A JPH0286113 A JP H0286113A
Authority
JP
Japan
Prior art keywords
electrolyte
polyvinyl alcohol
ammonium borate
partially saponified
saponified polyvinyl
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
Application number
JP23630088A
Other languages
Japanese (ja)
Other versions
JPH0722088B2 (en
Inventor
Takahito Sugiura
杉浦 尊仁
Kenichi Iida
飯田 謙一
Ryutaro Nagai
永井 竜太郎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lincstech Circuit Co Ltd
Original Assignee
Hitachi Condenser Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Condenser Co Ltd filed Critical Hitachi Condenser Co Ltd
Priority to JP23630088A priority Critical patent/JPH0722088B2/en
Publication of JPH0286113A publication Critical patent/JPH0286113A/en
Publication of JPH0722088B2 publication Critical patent/JPH0722088B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Compositions Of Macromolecular Compounds (AREA)

Abstract

PURPOSE:To improve a workability of dissolution and to contrive the improvement of the withstand voltage characteristics of an electrolyte by a method wherein partially saponified polyvinyl alcohol and ammonium borate are added to the electrolyte consisting of a mixed solution of polyhydric alcohol and ether polyol. CONSTITUTION:Partially saponified polyvinyl alcohol and ammonium borate are added to an electrolyte consisting a mixed solution of polyhydric alcohol, such as ethylene glycol, diethylene glycol, glycerin and the like, and ether polyol. Thereby, the improvement of the breakdown strength of the electrolyte becomes possible and moreover, by adding partially saponified polyvinyl alcohol and ammonium borate, which have a good solubility, to the electrolyte, an electrolyte having excellent breakdown strength characteristics can be obtained.

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。
DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to an electrolytic solution for electrolytic capacitors 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。
In conventional aluminum electrolytic capacitors, the thickness of the anodic oxide film and the withstand voltage of the electrolyte are determined to withstand the operating voltage. Therefore, improving the withstand voltage of the electrolyte is an important theme when manufacturing high-voltage aluminum electrolytic capacitors. Therefore, studies are being conducted on solvents and additives to obtain electrolytes with high voltage resistance.

この中で電解液の耐圧を高める手段としてポリビニルア
ルコールとホウ酸を添加した電解液が特開昭60−91
618号として公知である。
Among these, an electrolyte solution containing polyvinyl alcohol and boric acid was developed in JP-A-60-91 as a means of increasing the withstand voltage of the electrolyte solution.
It is known as No. 618.

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、激しい攪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 electrolyte exhibits excellent solubility in water, but has a drawback of low solubility in organic solvents such as polyhydric alcohols. As a means of dissolving polyvinyl alcohol, the temperature of the solvent must be extremely raised and vigorous stirring must 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ルアルコールとホウ
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 composed of partially saponified polyvinyl alcohol and a mixed solvent of polyhydric alcohol such as ethylene glycol, diethylene glycol, glycerin, and ether type polyol. ammonium borate.

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く以下物質
Bという)を含む。
Ether type polyols include addition polymers of propylene glycol and propylene oxide (hereinafter referred to as substance A) and addition polymers of glycerin and propylene oxide (hereinafter referred to as substance B).

物質Aの構造式は 可能になり、さらに溶解性が良好な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。
The structural formula of substance A can be obtained, and by adding partially saponified polyvinyl alcohol and ammonium borate, which have good solubility, it is possible to obtain an electrolytic solution with excellent pressure resistance characteristics.

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 lists the compositions, concentrations (% by weight), and spark voltages of Conventional Examples 1 and 2 and Examples 1 to 4 of the present invention.

以下余白。Margin below.

物質Bの構造式は H3 である。The structural formula of substance B is H3 It 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表−1 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
対比して、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。
Effect The present invention improves pressure resistance by using a mixed solvent of a polyhydric alcohol and an ether type polyol. In the examples of the present invention in which ammonium borate was added, the breakdown voltage characteristics were greatly improved compared to the conventional examples, and the improvement in breakdown voltage was also observed in comparison with the reference examples. From this, it can be seen that the pressure resistance characteristics are improved even by using only 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 structure as described above, and the present invention has been able to provide an electrolytic solution with improved voltage resistance characteristics compared to conventional electrolytic solutions.

特許出願人 日立コンデンサ株式会社Patent applicant: Hitachi Capacitor Co., Ltd.

Claims (2)

【特許請求の範囲】[Claims] (1)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, characterized in that partially saponified polyvinyl alcohol and ammonium borate are added to an electrolytic solution consisting of a mixed solvent of a polyhydric alcohol and an ether type polyol.
(2)請求項1記載において、エーテル型のポリオール
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.
JP23630088A 1988-09-22 1988-09-22 Electrolytic solution for electrolytic capacitors Expired - Lifetime JPH0722088B2 (en)

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 true JPH0286113A (en) 1990-03-27
JPH0722088B2 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)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09298132A (en) * 1996-05-09 1997-11-18 Nichicon Corp Electrolytic solution for electrolytic capacitor drive

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09298132A (en) * 1996-05-09 1997-11-18 Nichicon Corp Electrolytic solution for electrolytic capacitor drive

Also Published As

Publication number Publication date
JPH0722088B2 (en) 1995-03-08

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