JPH09298132A - Electrolytic solution for electrolytic capacitor drive - Google Patents
Electrolytic solution for electrolytic capacitor driveInfo
- Publication number
- JPH09298132A JPH09298132A JP8114719A JP11471996A JPH09298132A JP H09298132 A JPH09298132 A JP H09298132A JP 8114719 A JP8114719 A JP 8114719A JP 11471996 A JP11471996 A JP 11471996A JP H09298132 A JPH09298132 A JP H09298132A
- Authority
- JP
- Japan
- Prior art keywords
- polyvinyl alcohol
- electrolytic
- polyvinyl
- polyvinyl acetate
- electrolytic capacitor
- 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
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
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、単に電解液と称す）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, simply 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
る溶媒に高級二塩基酸またはそのアンモニウム塩、及び
ホウ酸またはホウ酸アンモニウムを溶解した電解コンデ
ンサ用電解液に、ポリビニルアルコールを添加すると、
ホウ酸や、添加剤として用いたリン酸等とエステル化合
物を形成しその構造的な特性により電解液の耐電圧が向
上するとされている。2. Description of the Related Art Conventionally, when polyvinyl alcohol is added to an electrolytic solution for an electrolytic capacitor in which a higher dibasic acid or an ammonium salt thereof and boric acid or ammonium borate are dissolved in a solvent containing ethylene glycol as a main component,
It is said that an ester compound is formed with boric acid or phosphoric acid used as an additive to improve the withstand voltage of the electrolytic solution due to its structural characteristics.
【０００３】[0003]
【発明が解決しようとする課題】ポリビニルアルコール
はエチレングリコールを主成分とする溶媒に対して溶解
性が非常に乏しく、同重合度のポリビニルアルコールの
場合、その溶解性はケン化度、及びポリ酢酸ビニルとポ
リビニルアルコールの分布状態にわずかに依存してい
る。しかし一直鎖上にポリ酢酸ビニルとポリビニルアル
コールが分布している部分ケン化ポリビニルアルコール
は、溶媒や溶解状態によって、溶解度が低下することが
あり、また溶解しても高分子の利点である高耐電圧性を
十分に生かしきれないという欠点をもっている。本発明
は上記の欠点を改善し、電解液に対するポリビニルアル
コールの溶解性を向上させ、ポリビニルアルコールの高
分子であるが故の利点、すなわち高耐電圧性を充分活用
することができる電解コンデンサ用電解液を提供するも
のである。Polyvinyl alcohol has very poor solubility in a solvent containing ethylene glycol as a main component. In the case of polyvinyl alcohol having the same degree of polymerization, the solubility is saponification degree and polyacetic acid. It is slightly dependent on the distribution of vinyl and polyvinyl alcohol. However, partially saponified polyvinyl alcohol, in which polyvinyl acetate and polyvinyl alcohol are distributed in one straight chain, may have reduced solubility depending on the solvent and the state of dissolution, and even if dissolved, high resistance, which is an advantage of the polymer, is high. It has the drawback that it cannot fully utilize the voltage characteristics. The present invention improves the above-mentioned drawbacks, improves the solubility of polyvinyl alcohol in an electrolytic solution, and has the advantage of being a polymer of polyvinyl alcohol, that is, electrolytic for electrolytic capacitors capable of fully utilizing high voltage resistance. It provides a liquid.
【０００４】[0004]
【課題を解決する手段】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、見い出されたものである。本
発明者はグラフト化ポリ酢酸ビニル−ポリビニルアルコ
ール共重合体がその構造上の特性より電解液に対する溶
解性が高いことに着目し、その特性を電解液に適用する
ことにより課題の解決を図った。すなわち、本発明は、
エチレングリコールを主成分とする溶媒に高級二塩基酸
またはそのアンモニウム塩、及びホウ酸またはホウ酸ア
ンモニウムを溶解し、グラフト化ポリ酢酸ビニル−ポリ
ビニルアルコール共重合体を０．１〜１．０重量％溶解
し、耐電圧性を向上させた電解コンデンサ用電解液であ
る。The present invention has been found as a result of various studies for solving the above problems. The present inventor has noticed that the grafted polyvinyl acetate-polyvinyl alcohol copolymer has higher solubility in an electrolytic solution than its structural characteristics, and has attempted to solve the problem by applying the characteristics to the electrolytic solution. . That is, the present invention
Higher dibasic acid or its ammonium salt, and boric acid or ammonium borate are dissolved in a solvent containing ethylene glycol as a main component, and 0.1 to 1.0% by weight of a grafted polyvinyl acetate-polyvinyl alcohol copolymer is dissolved. It is an electrolytic solution for electrolytic capacitors that is dissolved and has improved withstand voltage.
【０００５】[0005]
【発明の実施の形態】部分ケン化ポリビニルアルコール
の場合、一直鎖上にポリ酢酸ビニルとポリビニルアルコ
ールが分布した構造を示すが、エチレングリコールを主
成分とする溶媒中では、部分ケン化ポリビニルアルコー
ル上に分布する水酸基同士がミセル状に集合し、静電的
な結合により溶解性が低下する。また、溶解しても糸屑
状に絡み合った状態で電解液に存在するため、高分子の
利点が十分生かされない場合がある。ポリビニルアルコ
ールを保護コロイドに用いた酢酸ビニルのグラフト重合
によって得られるグラフト化ポリ酢酸ビニル−ポリビニ
ルアルコール共重合体はポリビニルアルコールの直鎖か
らポリ酢酸ビニルが枝分かれした、魚の骨のような構造
を示す。その枝分かれしたポリ酢酸ビニルがポリビニル
アルコールの水酸基の静電的結合を抑制し、そのため直
鎖が絡み合わずに電解液中に存在するため高分子である
特性が生かされ、火花電圧を上昇させることが可能とな
った。BEST MODE FOR CARRYING OUT THE INVENTION In the case of partially saponified polyvinyl alcohol, a structure in which polyvinyl acetate and polyvinyl alcohol are distributed in a straight chain is shown, but in a solvent containing ethylene glycol as a main component, Hydroxyl groups that are distributed in aggregate like micelles, and the solubility decreases due to electrostatic bonding. Further, even if dissolved, it exists in the electrolytic solution in a state of being entangled in the form of lint, so that the advantage of the polymer may not be fully utilized. The grafted polyvinyl acetate-polyvinyl alcohol copolymer obtained by the graft polymerization of vinyl acetate using polyvinyl alcohol as a protective colloid shows a fish bone-like structure in which polyvinyl acetate is branched from a straight chain of polyvinyl alcohol. The branched polyvinyl acetate suppresses the electrostatic coupling of the hydroxyl groups of polyvinyl alcohol, so that the straight chain is present in the electrolyte solution without being entangled with each other, and the characteristic that it is a polymer is used to increase the spark voltage. Became possible.
【０００６】[0006]
【実施例】以下、実施例の具体的内容について説明す
る。溶媒にはエチレングリコールを、溶質には７−ビニ
ル−９−ヘキサデセン−１，１６ジカルボン酸またはそ
のアンモニウム塩を用い、添加剤としてはマンニトー
ル、オルトリン酸、グラフト化ポリ酢酸ビニル−ポリビ
ニルアルコール共重合体を、ｐＨ調整剤としてアンモニ
ア水を用いた。表１に実施例、比較例、従来例の組成お
よび測定結果を示す。但し、比抵抗は３０℃、火花発生
電圧は８５℃において測定した。また比較例に用いた部
分ケン化ポリビニルアルコールと、グラフト化ポリ酢酸
ビニル−ポリビニルアルコール共重合体の重合度、及び
アセチル基と水酸基の比率はほぼ等しいものを使用し
た。従来例に比べ比較例２の部分ケン化ポリビニルアル
コールを０．５％添加したものは比抵抗は１０Ω・ｃｍ
程の上昇がみられたが、火花発生電圧は３０Ｖ上昇し
た。実施例２のグラフト化ポリ酢酸ビニル−ポリビニル
アルコール共重合体を添加したものでは部分ケン化ポリ
ビニルアルコールを用いたときとほぼ同じ位の比抵抗で
あったが、火花電圧はさらに１５Ｖ高く、４３５Ｖにま
で達した。ここで、グラフト化ポリ酢酸ビニル−ポリビ
ニルアルコール共重合体の添加量は０．１重量％未満で
は上記の効果は得られず、１．０重量％を超えると、溶
解性の低下伴うため不適である。EXAMPLES The concrete contents of the examples will be described below. Ethylene glycol is used as a solvent, 7-vinyl-9-hexadecene-1,16 dicarboxylic acid or its ammonium salt is used as a solute, and mannitol, orthophosphoric acid, a grafted polyvinyl acetate-polyvinyl alcohol copolymer is used as an additive. Was used as a pH adjusting agent. Table 1 shows the compositions and measurement results of Examples, Comparative Examples and Conventional Examples. However, the specific resistance was measured at 30 ° C. and the spark generation voltage was measured at 85 ° C. Further, the partially saponified polyvinyl alcohol used in the comparative example and the grafted polyvinyl acetate-polyvinyl alcohol copolymer having the same degree of polymerization and the ratio of acetyl groups to hydroxyl groups were used. Compared with the conventional example, the partially saponified polyvinyl alcohol of Comparative Example 2 added with 0.5% has a specific resistance of 10 Ω · cm.
Although a slight increase was seen, the spark generation voltage increased by 30V. The graft resistance of the grafted polyvinyl acetate-polyvinyl alcohol copolymer of Example 2 was about the same as that of the partially saponified polyvinyl alcohol, but the spark voltage was 15V higher and 435V. Reached Here, if the added amount of the grafted polyvinyl acetate-polyvinyl alcohol copolymer is less than 0.1% by weight, the above effect cannot be obtained, and if it exceeds 1.0% by weight, the solubility is lowered, which is unsuitable. is there.
【０００７】[0007]
【表１】 [Table 1]
【０００８】[0008]
【発明の効果】上述した通り、グラフト化ポリ酢酸ビニ
ル−ポリビニルアルコールを用いることで、溶媒に対す
る溶解性を高めることができ、かつ火花発生電圧を向上
させ得る電解コンデンサ用電解液を提供することができ
る。As described above, by using the grafted polyvinyl acetate-polyvinyl alcohol, it is possible to provide an electrolytic solution for an electrolytic capacitor, which can improve the solubility in a solvent and can improve the spark generation voltage. it can.
Claims (1)
に高級二塩基酸またはそのアンモニウム塩、及びホウ酸
またはホウ酸アンモニウムを溶解し、グラフト化ポリ酢
酸ビニル−ポリビニルアルコール共重合体を０．１〜
１．０重量％溶解することを特徴とする電解コンデンサ
駆動用電解液。1. A higher dibasic acid or an ammonium salt thereof, and boric acid or ammonium borate are dissolved in a solvent containing ethylene glycol as a main component to prepare a grafted polyvinyl acetate-polyvinyl alcohol copolymer in an amount of 0.1 to 0.1%.
An electrolytic solution for driving an electrolytic capacitor, which is dissolved by 1.0% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11471996A JP3705864B2 (en) | 1996-05-09 | 1996-05-09 | Electrolytic solution for electrolytic capacitor drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11471996A JP3705864B2 (en) | 1996-05-09 | 1996-05-09 | Electrolytic solution for electrolytic capacitor drive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09298132A true JPH09298132A (en) | 1997-11-18 |
| JP3705864B2 JP3705864B2 (en) | 2005-10-12 |
Family
ID=14644915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11471996A Expired - Fee Related JP3705864B2 (en) | 1996-05-09 | 1996-05-09 | Electrolytic solution for electrolytic capacitor drive |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3705864B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002280267A (en) * | 2001-03-16 | 2002-09-27 | Nichicon Corp | Electrolyte for drive for electrolytic capacitor |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0251209A (en) * | 1988-08-12 | 1990-02-21 | Hitachi Condenser Co Ltd | Electrolyte for electrolytic capacitor |
| JPH0266919A (en) * | 1988-09-01 | 1990-03-07 | Hitachi Condenser Co Ltd | Electrolyte for electrolytic capacitor |
| JPH0286113A (en) * | 1988-09-22 | 1990-03-27 | Hitachi Condenser Co Ltd | Electrolyte for electrolytic capacitor |
| JPH0513275A (en) * | 1991-07-04 | 1993-01-22 | Matsushita Electric Ind Co Ltd | Electrolyte for driving electrolytic capacitor |
| JPH05182870A (en) * | 1991-12-27 | 1993-07-23 | Matsushita Electric Ind Co Ltd | Aluminum electrolytic capacitor |
| JPH0745482A (en) * | 1993-07-29 | 1995-02-14 | Sanyo Chem Ind Ltd | Electrolyte for driving electrolytic capacitor |
| JPH07249546A (en) * | 1994-03-14 | 1995-09-26 | Nichicon Corp | Driving electrolyte of electrolytic capacitor |
-
1996
- 1996-05-09 JP JP11471996A patent/JP3705864B2/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0251209A (en) * | 1988-08-12 | 1990-02-21 | Hitachi Condenser Co Ltd | Electrolyte for electrolytic capacitor |
| JPH0266919A (en) * | 1988-09-01 | 1990-03-07 | Hitachi Condenser Co Ltd | Electrolyte for electrolytic capacitor |
| JPH0286113A (en) * | 1988-09-22 | 1990-03-27 | Hitachi Condenser Co Ltd | Electrolyte for electrolytic capacitor |
| JPH0513275A (en) * | 1991-07-04 | 1993-01-22 | Matsushita Electric Ind Co Ltd | Electrolyte for driving electrolytic capacitor |
| JPH05182870A (en) * | 1991-12-27 | 1993-07-23 | Matsushita Electric Ind Co Ltd | Aluminum electrolytic capacitor |
| JPH0745482A (en) * | 1993-07-29 | 1995-02-14 | Sanyo Chem Ind Ltd | Electrolyte for driving electrolytic capacitor |
| JPH07249546A (en) * | 1994-03-14 | 1995-09-26 | Nichicon Corp | Driving electrolyte of electrolytic capacitor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002280267A (en) * | 2001-03-16 | 2002-09-27 | Nichicon Corp | Electrolyte for drive for electrolytic capacitor |
| JP4481516B2 (en) * | 2001-03-16 | 2010-06-16 | ニチコン株式会社 | Electrolytic solution for driving electrolytic capacitors |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3705864B2 (en) | 2005-10-12 |
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