JP2003059771A - Driving electrolyte for electrolytic capacitor - Google Patents
Driving electrolyte for electrolytic capacitorInfo
- Publication number
- JP2003059771A JP2003059771A JP2001243172A JP2001243172A JP2003059771A JP 2003059771 A JP2003059771 A JP 2003059771A JP 2001243172 A JP2001243172 A JP 2001243172A JP 2001243172 A JP2001243172 A JP 2001243172A JP 2003059771 A JP2003059771 A JP 2003059771A
- Authority
- JP
- Japan
- Prior art keywords
- acid
- electrolytic capacitor
- vinyl alcohol
- electrolytic solution
- propylene glycol
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電解コンデンサの
駆動用電解液（以下、電解液と称す）の改良に関するも
のであり、特に耐電圧を改善した電解液に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved electrolytic solution for driving an electrolytic capacitor (hereinafter referred to as an electrolytic solution), and more particularly to an electrolytic solution having improved withstand voltage.
【０００２】[0002]
【従来の技術】従来、エチレングリコールを主成分とす
る溶媒に、カルボキシル基を有する酸またはその塩と、
ホウ酸またはそのアンモニウム塩とを溶解した電解液
に、ポリエチレングリコール、ポリビニルアルコール等
の合成高分子を添加し耐電圧を向上させた電解液が使用
されてきた。2. Description of the Related Art Conventionally, a solvent containing ethylene glycol as a main component, an acid having a carboxyl group or a salt thereof,
An electrolytic solution in which a synthetic polymer such as polyethylene glycol or polyvinyl alcohol is added to an electrolytic solution in which boric acid or an ammonium salt thereof is dissolved to improve withstand voltage has been used.
【０００３】[0003]
【発明が解決しようとする課題】しかし、平均分子量が
１０００未満の比較的重合度の低いポリエチレングリコ
ールは、エチレングリコールを主成分とする溶媒への溶
解性は高いが、耐電圧向上効果が低く、多量に溶解させ
る必要がある上、溶解量と共に電解液の比抵抗が上昇す
るという問題がある。そして、平均分子量が１０００以
上のポリエチレングリコールは、耐電圧向上効果は高い
が、溶解性は低いという問題がある。また、ポリビニル
アルコールも耐電圧向上効果が得られるが、エチレング
リコールを主成分とする溶媒に対しての溶解性が非常に
低いためごく少量しか添加できないという問題があっ
た。本発明は上記の問題を改善するもので、電解液の比
抵抗の上昇を抑制しつつ、耐電圧の向上を図ることがで
き、溶媒への溶解性の向上も可能な電解液を提供するも
のである。However, polyethylene glycol having an average molecular weight of less than 1000 and a relatively low degree of polymerization has high solubility in a solvent containing ethylene glycol as a main component, but has a low withstand voltage improving effect. It is necessary to dissolve a large amount, and there is a problem that the specific resistance of the electrolytic solution increases with the amount of dissolution. Polyethylene glycol having an average molecular weight of 1,000 or more has a high withstand voltage improving effect, but has a problem of low solubility. Further, polyvinyl alcohol also has an effect of improving withstand voltage, but it has a problem that it can be added only in a very small amount because its solubility in a solvent containing ethylene glycol as a main component is very low. The present invention improves the above problems and provides an electrolytic solution capable of improving the withstand voltage while suppressing an increase in the specific resistance of the electrolytic solution and also improving the solubility in a solvent. Is.
【０００４】[0004]
【課題を解決するための手段】本発明は、上記の課題を
解決するために各種検討した結果、見出されたものであ
り、ポリエチレングリコールにメチル基が結合したポリ
プロピレングリコールがエチレングリコールを主成分と
する溶媒に対して高い溶解性を示すことに着目し、エチ
レングリコールを主成分とする溶媒に対して溶解性は低
いが耐電圧向上効果の高いポリビニルアルコールの特徴
を併せ持つプロピレングリコール−ビニルアルコール共
重合体を溶解することで、電解液の比抵抗の上昇を抑制
しつつ、耐電圧の向上を図ろうとするものである。すな
わち、エチレングリコールを主成分とする溶媒に、カル
ボキシル基を有する酸またはその塩と、ホウ酸またはそ
のアンモニウム塩と、プロピレングリコール−ビニルア
ルコール共重合体とを溶解することを特徴とする電解コ
ンデンサの駆動用電解液である。Means for Solving the Problems The present invention has been found as a result of various studies for solving the above-mentioned problems, and polypropylene glycol in which a methyl group is bonded to polyethylene glycol contains ethylene glycol as a main component. Paying attention to exhibiting high solubility in a solvent containing ethylene glycol as a main component, a propylene glycol-vinyl alcohol copolymer having the characteristics of polyvinyl alcohol, which has a low solubility in a solvent containing ethylene glycol as a main component, but has a high withstand voltage improving effect. By dissolving the polymer, it is intended to improve the withstand voltage while suppressing an increase in the specific resistance of the electrolytic solution. That is, in a solvent containing ethylene glycol as a main component, an acid having a carboxyl group or a salt thereof, boric acid or an ammonium salt thereof, and a propylene glycol-vinyl alcohol copolymer are dissolved. It is a driving electrolyte.
【０００５】そして、上記プロピレングリコール−ビニ
ルアルコール共重合体の溶解量が、０．１０〜１０．０
重量％であることを特徴とする電解コンデンサの駆動用
電解液である。The amount of the propylene glycol-vinyl alcohol copolymer dissolved is 0.10 to 10.0.
It is an electrolytic solution for driving an electrolytic capacitor, which is characterized in that the content is wt%.
【０００６】さらに、上記プロピレングリコール−ビニ
ルアルコール共重合体の平均分子量が、１０００〜２０
００であることを特徴とする電解コンデンサの駆動用電
解液である。Further, the propylene glycol-vinyl alcohol copolymer has an average molecular weight of 1,000 to 20.
It is an electrolytic solution for driving an electrolytic capacitor, characterized in that it is 00.
【０００７】エチレングリコールに混合する副溶媒とし
ては、水の他、プロピレングリコール等のグリコール
類、γ−ブチロラクトン、Ｎ−メチル−２−ピロリドン
等のラクトン類、Ｎ−メチルホルムアミド、Ｎ，Ｎ−ジ
メチルホルムアミド、Ｎ−エチルホルムアミド、Ｎ，Ｎ
−ジエチルホルムアミド、Ｎ−メチルアセトアミド、
Ｎ，Ｎ−ジメチルアセトアミド、Ｎ−エチルアセトアミ
ド、Ｎ，Ｎ−ジエチルアセトアミド、ヘキサメチルホス
ホリックアミド等のアミド類、エチレンカーボネート、
プロピレンカーボネート、イソブチレンカーボネート等
の炭酸類、アセトニトリル等のニトリル類、ジメチルス
ルホキシド等のオキシド類、エーテル類、ケトン類、エ
ステル類等を例示することができる。As the subsolvent to be mixed with ethylene glycol, in addition to water, glycols such as propylene glycol, lactones such as γ-butyrolactone and N-methyl-2-pyrrolidone, N-methylformamide and N, N-dimethyl. Formamide, N-ethylformamide, N, N
-Diethylformamide, N-methylacetamide,
Amides such as N, N-dimethylacetamide, N-ethylacetamide, N, N-diethylacetamide, hexamethylphosphoric amide, ethylene carbonate,
Examples thereof include carbonates such as propylene carbonate and isobutylene carbonate, nitriles such as acetonitrile, oxides such as dimethyl sulfoxide, ethers, ketones, esters and the like.
【０００８】そして、上記カルボキシル基を有する酸と
して、アゼライン酸の他、蟻酸、酢酸、アクリル酸、プ
ロピオン酸、乳酸、酪酸、吉草酸、グルコン酸、安息香
酸、ｐ−ニトロ安息香酸、アントラニル酸、サリチル
酸、ゲンチシン酸、没食子酸、マロン酸、こはく酸、グ
ルタル酸、アジピン酸、ピメリン酸、スベリン酸、セバ
シン酸、デカンジカルボン酸、蓚酸、トルトロン酸、フ
マル酸、マレイン酸、シトラコン酸、リンゴ酸、酒石
酸、フタル酸、ボロジサリチル酸、クエン酸、ピロメリ
ト酸、ナフトエ酸等が挙げられる。As the acid having a carboxyl group, azelaic acid, formic acid, acetic acid, acrylic acid, propionic acid, lactic acid, butyric acid, valeric acid, gluconic acid, benzoic acid, p-nitrobenzoic acid, anthranilic acid, Salicylic acid, gentisic acid, gallic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, sebacic acid, decanedicarboxylic acid, oxalic acid, toltronic acid, fumaric acid, maleic acid, citraconic acid, malic acid, Examples thereof include tartaric acid, phthalic acid, borodisalicylic acid, citric acid, pyromellitic acid, and naphthoic acid.
【０００９】また、上記カルボキシル基を有する酸の塩
として、アンモニウム塩の他、モノメチルアミン、モノ
エチルアミン、モノエタノールアミン、イソプロピルア
ミン、ｎ−プロピルアミン、ジメチルアミン、ジエチル
アミン、ジエタノールアミン、ジ−ｎ−プロピルアミ
ン、ジイソプロピルアミン、トリ−ｎ−プロピルアミ
ン、トリメチルアミン、トリエチルアミン、トリエタノ
ールアミン、トリ−ｎ−ブチルアミン、ジメチルエチル
アミン、ナフタレンジアミン、ベンジルアミン等の塩が
挙げられる。Further, as the salt of the acid having a carboxyl group, in addition to ammonium salt, monomethylamine, monoethylamine, monoethanolamine, isopropylamine, n-propylamine, dimethylamine, diethylamine, diethanolamine, di-n-propyl. Examples thereof include salts of amine, diisopropylamine, tri-n-propylamine, trimethylamine, triethylamine, triethanolamine, tri-n-butylamine, dimethylethylamine, naphthalenediamine, benzylamine and the like.
【００１０】[0010]
【発明の実施の形態】プロピレングリコール−ビニルア
ルコール共重合体は、ポリプロピレングリコールのエチ
レングリコールを主成分とする溶媒への溶解性が高いと
いう特徴と、ポリビニルアルコールの耐電圧向上効果が
高いという特徴を併せ持つので、エチレングリコールを
主成分とする溶媒に溶解することで、電解液の比抵抗の
上昇を抑制しながら、耐電圧の向上を図ることができ
る。BEST MODE FOR CARRYING OUT THE INVENTION The propylene glycol-vinyl alcohol copolymer is characterized by high solubility of polypropylene glycol in a solvent containing ethylene glycol as a main component and by polyvinyl alcohol having a high withstand voltage improving effect. Since it also has both, by dissolving in a solvent containing ethylene glycol as a main component, it is possible to improve the withstand voltage while suppressing an increase in the specific resistance of the electrolytic solution.
【００１１】[0011]
【実施例】以下、本発明を実施例に基づき具体的に説明
する。表１の組成で電解液を調合し、３０℃における比
抵抗と、８５℃における火花発生電圧（耐電圧）を測定
した。EXAMPLES The present invention will be specifically described below based on examples. An electrolytic solution was prepared with the composition shown in Table 1, and the specific resistance at 30 ° C. and the spark generation voltage (withstand voltage) at 85 ° C. were measured.
【００１２】[0012]
【表１】 [Table 1]
【００１３】表１よりプロピレングリコール−ビニルア
ルコール共重合体を溶解した実施例は、ポリエチレング
リコールまたはポリビニルアルコールを溶解した従来例
より低比抵抗で耐電圧を向上できることがわかる。さら
にポリエチレングリコールやポリビニルアルコールより
多量に溶解することができ、かつ比抵抗の上昇を抑えな
がら耐電圧を向上できることが分かる。It can be seen from Table 1 that the examples in which the propylene glycol-vinyl alcohol copolymer is dissolved can improve the withstand voltage with a lower specific resistance than the conventional examples in which polyethylene glycol or polyvinyl alcohol is dissolved. Further, it can be understood that it can be dissolved in a larger amount than polyethylene glycol or polyvinyl alcohol, and that the withstand voltage can be improved while suppressing an increase in the specific resistance.
【００１４】なお、プロピレングリコール−ビニルアル
コール共重合体の溶解量は、０．０５重量％では耐電圧
向上効果が少なく、１２．０重量％では比抵抗が高くな
りすぎ低比抵抗用途に不適となるので、プロピレングリ
コール−ビニルアルコール共重合体の溶解量は、０．１
０〜１０．０重量％の範囲が好ましい。When the amount of the propylene glycol-vinyl alcohol copolymer dissolved is 0.05% by weight, the effect of improving the withstand voltage is small, and when it is 12.0% by weight, the specific resistance becomes too high and it is unsuitable for low specific resistance applications. Therefore, the dissolution amount of the propylene glycol-vinyl alcohol copolymer is 0.1
The range of 0 to 10.0% by weight is preferable.
【００１５】また、実施例９のようにプロピレングリコ
ール−ビニルアルコール共重合体の平均分子量が７００
では、耐電圧の向上効果が少なく、実施例１４のように
平均分子量が３０００では、耐電圧向上効果が緩慢にな
るとともに電解液の調合に時間がかかるので、プロピレ
ングリコール−ビニルアルコール共重合体の平均分子量
は、１０００〜２０００の範囲が好ましい。Further, as in Example 9, the propylene glycol-vinyl alcohol copolymer had an average molecular weight of 700.
Then, the effect of improving the withstand voltage is small, and when the average molecular weight is 3000 as in Example 14, the effect of improving the withstand voltage is slow and it takes time to prepare the electrolytic solution, so that the propylene glycol-vinyl alcohol copolymer The average molecular weight is preferably in the range of 1000 to 2000.
【００１６】なお、プロピレングリコール−ビニルアル
コール共重合体を溶解した効果は、実施例に限定される
ものではなく、先に記載した各種化合物を単独または複
数溶解・混合した電解液に用いても実施例と同等の効果
があるのは言うまでもない。The effect of dissolving the propylene glycol-vinyl alcohol copolymer is not limited to the examples, and the effect can be obtained by using the above-mentioned various compounds alone or in an electrolytic solution in which a plurality of them are dissolved and mixed. It goes without saying that it has the same effect as the example.
【００１７】[0017]
【発明の効果】上記したとおり、本発明によるプロピレ
ングリコール−ビニルアルコール共重合体をエチレング
リコールを主成分とする溶媒に溶解することで、電解液
の比抵抗の上昇を抑制しながら耐電圧の向上を図ること
ができ、さらに上記共重合体は溶解性も高いので作業性
も改善することができ、工業的、実用的価値大なるもの
である。As described above, by dissolving the propylene glycol-vinyl alcohol copolymer according to the present invention in a solvent containing ethylene glycol as a main component, the withstand voltage is improved while suppressing the increase in the specific resistance of the electrolytic solution. In addition, since the above-mentioned copolymer has high solubility, workability can be improved, which is of great industrial and practical value.
Claims (3)
に、カルボキシル基を有する酸またはその塩と、ホウ酸
またはそのアンモニウム塩と、プロピレングリコール−
ビニルアルコール共重合体とを溶解することを特徴とす
る電解コンデンサの駆動用電解液。1. A solvent containing ethylene glycol as a main component, an acid having a carboxyl group or a salt thereof, boric acid or an ammonium salt thereof, and propylene glycol-
An electrolytic solution for driving an electrolytic capacitor, which is characterized by dissolving a vinyl alcohol copolymer.
ビニルアルコール共重合体の溶解量が、０．１０〜１
０．０重量％であることを特徴とする電解コンデンサの
駆動用電解液。2. The propylene glycol according to claim 1.
The dissolution amount of the vinyl alcohol copolymer is 0.10 to 1
An electrolytic solution for driving an electrolytic capacitor, which is 0.0% by weight.
コール共重合体の平均分子量が、１０００〜２０００で
あることを特徴とする請求項１または２記載の電解コン
デンサの駆動用電解液。3. The electrolytic solution for driving an electrolytic capacitor according to claim 1 or 2, wherein the propylene glycol-vinyl alcohol copolymer has an average molecular weight of 1000 to 2000.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001243172A JP4653354B2 (en) | 2001-08-10 | 2001-08-10 | Electrolytic solution for electrolytic capacitor drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001243172A JP4653354B2 (en) | 2001-08-10 | 2001-08-10 | Electrolytic solution for electrolytic capacitor drive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003059771A true JP2003059771A (en) | 2003-02-28 |
| JP4653354B2 JP4653354B2 (en) | 2011-03-16 |
Family
ID=19073311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001243172A Expired - Fee Related JP4653354B2 (en) | 2001-08-10 | 2001-08-10 | Electrolytic solution for electrolytic capacitor drive |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4653354B2 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0513275A (en) * | 1991-07-04 | 1993-01-22 | Matsushita Electric Ind Co Ltd | Electrolyte for driving electrolytic capacitor |
| JPH08264388A (en) * | 1995-03-23 | 1996-10-11 | Nichicon Corp | Electrolyte for driving electrolytic capacitor |
| JP2000058395A (en) * | 1998-08-10 | 2000-02-25 | Nichicon Corp | Electrolytic solution for driving electrolytic capacitor |
| JP2002280267A (en) * | 2001-03-16 | 2002-09-27 | Nichicon Corp | Electrolyte for drive for electrolytic capacitor |
-
2001
- 2001-08-10 JP JP2001243172A patent/JP4653354B2/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0513275A (en) * | 1991-07-04 | 1993-01-22 | Matsushita Electric Ind Co Ltd | Electrolyte for driving electrolytic capacitor |
| JPH08264388A (en) * | 1995-03-23 | 1996-10-11 | Nichicon Corp | Electrolyte for driving electrolytic capacitor |
| JP2000058395A (en) * | 1998-08-10 | 2000-02-25 | Nichicon Corp | Electrolytic solution for driving electrolytic capacitor |
| JP2002280267A (en) * | 2001-03-16 | 2002-09-27 | Nichicon Corp | Electrolyte for drive for electrolytic capacitor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4653354B2 (en) | 2011-03-16 |
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