JPH0266919A - Electrolyte for electrolytic capacitor - Google Patents
Electrolyte for electrolytic capacitorInfo
- Publication number
- JPH0266919A JPH0266919A JP21629088A JP21629088A JPH0266919A JP H0266919 A JPH0266919 A JP H0266919A JP 21629088 A JP21629088 A JP 21629088A JP 21629088 A JP21629088 A JP 21629088A JP H0266919 A JPH0266919 A JP H0266919A
- Authority
- JP
- Japan
- Prior art keywords
- electrolyte
- alcohol
- vinyl acetate
- vinyl
- polymer
- 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
- 239000003990 capacitor Substances 0.000 title claims description 8
- 239000003792 electrolyte Substances 0.000 title abstract description 13
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims abstract description 15
- IMROMDMJAWUWLK-UHFFFAOYSA-N Ethenol Chemical compound OC=C IMROMDMJAWUWLK-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229920001577 copolymer Polymers 0.000 claims abstract description 8
- 239000002904 solvent Substances 0.000 claims abstract description 6
- 150000007524 organic acids Chemical class 0.000 claims abstract description 4
- 239000008151 electrolyte solution Substances 0.000 claims description 13
- 150000005846 sugar alcohols Polymers 0.000 claims description 9
- 229920000642 polymer Polymers 0.000 abstract description 8
- 239000004372 Polyvinyl alcohol Substances 0.000 abstract description 6
- 229920002451 polyvinyl alcohol Polymers 0.000 abstract description 6
- 125000002777 acetyl group Chemical group [H]C([H])([H])C(*)=O 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical group O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 230000002209 hydrophobic effect Effects 0.000 abstract description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 abstract 3
- 230000015556 catabolic process Effects 0.000 abstract 1
- 239000013078 crystal Substances 0.000 abstract 1
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 6
- 238000004090 dissolution Methods 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000010407 anodic oxide Substances 0.000 description 1
- GEWYFWXMYWWLHW-UHFFFAOYSA-N azanium;octanoate Chemical compound [NH4+].CCCCCCCC([O-])=O GEWYFWXMYWWLHW-UHFFFAOYSA-N 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000007127 saponification reaction Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、耐圧特性に優れ、かつ電解液の調整を容易に
する電解コンデンサ用電解液に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an electrolytic solution for electrolytic capacitors that has excellent withstand voltage characteristics and facilitates adjustment of the electrolytic solution.
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
の耐圧が使用電圧に耐えられるよう決定される。このた
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必要不可欠である。高耐圧
の電解液を得るために溶媒や添加物の検討が行われてき
た。電解液の耐圧を向上するもの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６０−９１６
１８号として公知である。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. For this reason, it is essential to improve the withstand voltage of the electrolyte when manufacturing high-voltage aluminum electrolytic capacitors. Solvents and additives have been investigated in order to obtain electrolytes with high voltage resistance. In order to improve the voltage resistance of the electrolyte, an electrolyte containing polyvinyl alcohol and boric acid was published in JP-A-60-916.
It is known as No. 18.
発明が解決しようとする課題
電解液に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
媒には溶解能力が低い欠点がある。Problems to be Solved by the Invention Polyvinyl alcohol used in the electrolyte exhibits excellent solubility in water, but has the drawback of low dissolution ability in organic solvents such as polyhydric alcohols.
これはポリビニルアルコールの構造に起因している。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。This is due to the structure of polyvinyl alcohol. 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
本発明の電解コンデンサの電解液は、多価アルコールを
溶媒とする有機酸系電解液を用い、この有機酸系電解液
に酢酸ビニルとビニルアルコールの共重合体を添加する
ことを特徴とするものである。Means for Solving the Problems The electrolytic solution of the electrolytic capacitor of the present invention uses an organic acid-based electrolytic solution using polyhydric alcohol as a solvent, and a copolymer of vinyl acetate and vinyl alcohol is added to this organic acid-based electrolytic solution. It is characterized by:
この酢酸ビニルとビニルアルコールの共重合体において
、酢酸ビニルのＪ’Ｊ合は１０〜４０％にするとよい。In this copolymer of vinyl acetate and vinyl alcohol, the J'J combination of vinyl acetate is preferably 10 to 40%.
作用
本発明の電解コンデンサの電解液に、酢酸ビニルとビニ
ルアルコールの共重合体を添加することによりポリマー
中にアセデル基が適当に導入され、水酸基同志の静電的
な結合が阻止される。このため、ポリビニルアルコール
の結晶が著しく低下し、多価アルコールへの溶解速度が
増し電解液の調整を迅速に行うことが可能になる。Function: By adding a copolymer of vinyl acetate and vinyl alcohol to the electrolytic solution of the electrolytic capacitor of the present invention, acedel groups are appropriately introduced into the polymer, and electrostatic bonding between hydroxyl groups is prevented. For this reason, the crystallization of polyvinyl alcohol is significantly reduced, and the rate of dissolution into polyhydric alcohol is increased, making it possible to quickly adjust the electrolyte solution.
実施例
第１図は、エチレングリコール等の多価アルコールに対
し、５重囲％のポリマーを溶かしたときの、酢酸ビニル
とビニルアルコール添加の割合における溶解時間（温度
１５０℃）との関係を示すグラフである。ポリマーの多
価アルコールへの溶解速度が、酢酸ビニルの添加割合に
依存していることがわかる。ポリマーが多価アルコール
に対し良好なる溶解性を示す酢酸ビニルの添加割合の範
囲は１０〜４０Φ吊％である。１０重量％以下の領域で
は、ポリマー中に存在する水酸基同志の静電的な結合が
強まり、４０重量％以上の領域では疎水性のアセチル基
が多く存在するために、ビニルアルコールの溶解速度は
極めて遅くなる。このように、ビニルアルコールのケン
化度を調節することにより各種の多価アルコールへの溶
解性を改善することができ、電解液調整時間の短縮化が
可能となる。Example Figure 1 shows the relationship between the dissolution time (temperature 150°C) and the ratio of vinyl acetate and vinyl alcohol added when 5% polymer is dissolved in polyhydric alcohol such as ethylene glycol. It is a graph. It can be seen that the dissolution rate of the polymer in the polyhydric alcohol depends on the addition ratio of vinyl acetate. The range of the addition ratio of vinyl acetate in which the polymer exhibits good solubility in polyhydric alcohol is 10 to 40%. In the region of 10% by weight or less, the electrostatic bond between the hydroxyl groups present in the polymer becomes strong, and in the region of 40% by weight or more, there are many hydrophobic acetyl groups, so the dissolution rate of vinyl alcohol is extremely low. Become slow. In this way, by adjusting the degree of saponification of vinyl alcohol, the solubility in various polyhydric alcohols can be improved, and the electrolyte preparation time can be shortened.
表１は、エチレングリコールを溶媒とし、ブチルオクタ
ンニ酸アンモン及びカプリル酸アンモンを電解質とした
電解液とこれに酢酸ビニルとビニルアルコールの共重合
体を添加した電解液の比抵抗値と火花電圧を比較したも
のである。比抵抗の増加はなく火花電圧を大幅に上昇さ
せることができた。Table 1 shows the specific resistance values and spark voltages of an electrolytic solution using ethylene glycol as a solvent and ammonium butyloctanioate and ammonium caprylate as an electrolyte, and an electrolytic solution containing a copolymer of vinyl acetate and vinyl alcohol. This is a comparison. It was possible to significantly increase the spark voltage without increasing specific resistance.
以下余白。Margin below.
調整が容易で、かつ耐圧特性の優れた高圧用の電解液が
得られた。A high-pressure electrolyte solution that was easy to adjust and had excellent pressure resistance characteristics was obtained.
第１図は、酢酸ビニルを添加した割合における多価アル
コールの溶解時間を示す曲線図である。
特許出願人 日立コンデンサ株式会社
発明の効果FIG. 1 is a curve diagram showing the dissolution time of polyhydric alcohol at different proportions of vinyl acetate added. Patent applicant: Hitachi Capacitor Co., Ltd. Effects of the invention
Claims (2)
酸ビニルとビニルアルコールの共重合体を添加すること
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 a copolymer of vinyl acetate and vinyl alcohol is added to an organic acid-based electrolytic solution using a polyhydric alcohol as a solvent.
コールの共重合体における酢酸ビニルの添加割合が１０
〜４０％である電解コンデンサ用電解液。(2) In claim 1, the addition ratio of vinyl acetate in the copolymer of vinyl acetate and vinyl alcohol is 10
~40% electrolytic solution for electrolytic capacitors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21629088A JPH0690992B2 (en) | 1988-09-01 | 1988-09-01 | Electrolytic solution for electrolytic capacitors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21629088A JPH0690992B2 (en) | 1988-09-01 | 1988-09-01 | Electrolytic solution for electrolytic capacitors |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0266919A true JPH0266919A (en) | 1990-03-07 |
| JPH0690992B2 JPH0690992B2 (en) | 1994-11-14 |
Family
ID=16686218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21629088A Expired - Lifetime JPH0690992B2 (en) | 1988-09-01 | 1988-09-01 | Electrolytic solution for electrolytic capacitors |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0690992B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09298132A (en) * | 1996-05-09 | 1997-11-18 | Nichicon Corp | Electrolytic solution for electrolytic capacitor drive |
| JP2003068582A (en) * | 2001-08-23 | 2003-03-07 | Nichicon Corp | Electrolyte for driving electrolytic capacitor |
-
1988
- 1988-09-01 JP JP21629088A patent/JPH0690992B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09298132A (en) * | 1996-05-09 | 1997-11-18 | Nichicon Corp | Electrolytic solution for electrolytic capacitor drive |
| JP2003068582A (en) * | 2001-08-23 | 2003-03-07 | Nichicon Corp | Electrolyte for driving electrolytic capacitor |
| JP4699649B2 (en) * | 2001-08-23 | 2011-06-15 | ニチコン株式会社 | Electrolytic solution for electrolytic capacitor drive |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0690992B2 (en) | 1994-11-14 |
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