JPS6025891B2 - Electrolyte for driving electrolytic capacitors - Google Patents
Electrolyte for driving electrolytic capacitorsInfo
- Publication number
- JPS6025891B2 JPS6025891B2 JP10212880A JP10212880A JPS6025891B2 JP S6025891 B2 JPS6025891 B2 JP S6025891B2 JP 10212880 A JP10212880 A JP 10212880A JP 10212880 A JP10212880 A JP 10212880A JP S6025891 B2 JPS6025891 B2 JP S6025891B2
- Authority
- JP
- Japan
- Prior art keywords
- acid
- ethylene glycol
- electrolytic
- electrolytic solution
- electrolyte
- 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
Links
- 239000003990 capacitor Substances 0.000 title claims description 34
- 239000003792 electrolyte Substances 0.000 title description 17
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 66
- 239000008151 electrolyte solution Substances 0.000 claims description 26
- 239000002904 solvent Substances 0.000 claims description 6
- 150000003839 salts Chemical class 0.000 claims description 5
- WPDNUCQHNPMNEO-UHFFFAOYSA-N 7-ethyloctadecanedioic acid Chemical compound OC(=O)CCCCCC(CC)CCCCCCCCCCC(O)=O WPDNUCQHNPMNEO-UHFFFAOYSA-N 0.000 claims description 3
- UWJRHVPYRNDMRO-UHFFFAOYSA-N 7-ethyltetradecanedioic acid Chemical compound OC(=O)CCCCCC(CC)CCCCCCC(O)=O UWJRHVPYRNDMRO-UHFFFAOYSA-N 0.000 claims description 3
- GVBULULMCIVBSE-UHFFFAOYSA-N 8-methylhexadec-8-enedioic acid Chemical compound OC(=O)CCCCCCC(C)=CCCCCCCC(O)=O GVBULULMCIVBSE-UHFFFAOYSA-N 0.000 claims description 3
- BTBJCTWMARHHQD-UHFFFAOYSA-N 2-heptadecylpropanedioic acid Chemical compound CCCCCCCCCCCCCCCCCC(C(O)=O)C(O)=O BTBJCTWMARHHQD-UHFFFAOYSA-N 0.000 claims description 2
- VNXKEQYMBSFLJJ-UHFFFAOYSA-N 8,13-dimethylicosa-8,12-dienedioic acid Chemical compound OC(=O)CCCCCCC(C)=CCCC=C(C)CCCCCCC(O)=O VNXKEQYMBSFLJJ-UHFFFAOYSA-N 0.000 claims description 2
- AUZCEKNHWOIGQH-UHFFFAOYSA-N 8-methylhexadecanedioic acid Chemical compound OC(=O)CCCCCCC(C)CCCCCCCC(O)=O AUZCEKNHWOIGQH-UHFFFAOYSA-N 0.000 claims description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 22
- 239000002253 acid Substances 0.000 description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- 229910021529 ammonia Inorganic materials 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 8
- 238000005886 esterification reaction Methods 0.000 description 5
- 239000011888 foil Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 3
- 239000005977 Ethylene Substances 0.000 description 3
- 150000007513 acids Chemical class 0.000 description 3
- 125000000217 alkyl group Chemical group 0.000 description 3
- 150000003863 ammonium salts Chemical class 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- FZWBABZIGXEXES-UHFFFAOYSA-N ethane-1,2-diol;hexanedioic acid Chemical compound OCCO.OC(=O)CCCCC(O)=O FZWBABZIGXEXES-UHFFFAOYSA-N 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 150000007524 organic acids Chemical class 0.000 description 3
- IQWKYRKBHFUUKH-UHFFFAOYSA-N 8,13-dimethylicosanedioic acid Chemical compound OC(=O)CCCCCCC(C)CCCCC(C)CCCCCCC(O)=O IQWKYRKBHFUUKH-UHFFFAOYSA-N 0.000 description 2
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000007112 amidation reaction Methods 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- RZJRJXONCZWCBN-UHFFFAOYSA-N octadecane Chemical compound CCCCCCCCCCCCCCCCCC RZJRJXONCZWCBN-UHFFFAOYSA-N 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- XNWFRZJHXBZDAG-UHFFFAOYSA-N 2-METHOXYETHANOL Chemical compound COCCO XNWFRZJHXBZDAG-UHFFFAOYSA-N 0.000 description 1
- FLDCSPABIQBYKP-UHFFFAOYSA-N 5-chloro-1,2-dimethylbenzimidazole Chemical compound ClC1=CC=C2N(C)C(C)=NC2=C1 FLDCSPABIQBYKP-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 239000001741 Ammonium adipate Substances 0.000 description 1
- 241001062872 Cleyera japonica Species 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000001361 adipic acid Substances 0.000 description 1
- 235000011037 adipic acid Nutrition 0.000 description 1
- 235000019293 ammonium adipate Nutrition 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000032050 esterification Effects 0.000 description 1
- 150000002334 glycols Chemical class 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 229940038384 octadecane Drugs 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、電解コンデンサの駆動用電解液（以下単に電
解液という）に係り、特に中高圧用電解コンデンサに好
適な電解液に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electrolytic solution for driving an electrolytic capacitor (hereinafter simply referred to as an electrolytic solution), and particularly to an electrolytic solution suitable for medium-high voltage electrolytic capacitors.
電解コンデンサの性能を支配する要因には様々なものが
あるが、その中でも電解液は、電解コンデンサの電気特
性、寿命特性を決定する重要な要因であることが知られ
ている。There are various factors that govern the performance of electrolytic capacitors, and among them, the electrolyte is known to be an important factor that determines the electrical characteristics and life characteristics of electrolytic capacitors.
従来の中高圧用（主に定格使用電圧が１６０Ｖを越える
ものを示す）電解コンデンサには、エチレングリコール
を主体とした溶媒に棚酸もし〈はそのアンモニウム塩を
溶解させた、いわゆるエチレングリコール−棚酸系の電
解液が用いられている。Conventional electrolytic capacitors for medium and high voltage (mainly those with a rated working voltage exceeding 160V) are manufactured using so-called ethylene glycol-shelf acid, which is made by dissolving shelf acid or its ammonium salt in a solvent mainly composed of ethylene glycol. An acid-based electrolyte is used.
しかし、かかる電解液は低圧用のたとえばエチレングリ
コールーアジピン酸系電解液などと比較して、その比抵
抗が著しく高いことから、電解コンデンサとして損失や
等価直列抵抗値の高い製品しか得ることができなかった
。However, since the specific resistance of such electrolytes is significantly higher than that of low-pressure electrolytes such as ethylene glycol-adipic acid electrolytes, it is only possible to obtain electrolytic capacitors with high losses and high equivalent series resistance values. There wasn't.
また、この系の電解液は、組成となる各薬品中に含まれ
る水分を他に、エチレングリコールと棚酸とをェステル
化して用いるために、ェステル化反応で生じる多量の水
を含有する。Furthermore, in addition to the water contained in each of the constituent chemicals, this type of electrolytic solution contains a large amount of water produced by the esterification reaction because ethylene glycol and shelf acid are esterified and used.
この水分は、電解コンデンサの陽極側電極箔表面に形成
された誘電体酸化皮膜を劣化させ、電解コンデンサの寿
命を著しく縮めることになる。これに加えて、多重の水
は、１０ぴ０を越える高温度下では多量の水蒸気が発生
し、電解コンデンサの外装ケース内部の圧力を上昇させ
、防嬢弁部の膨らみなどの外観変形や、これらに付随し
た特性劣化を起こす原因となり、優れた電気特性、寿命
特性、高い使用温度限定が要求される目的には使用する
ことができなかつた。また、エチレングリコールを主体
とした溶媒に、アジピン酸もしくはそのアンモニウム塩
を溶解させた、いわゆるエチレングリコールーアジピン
酸系の電解液は、エチレングリコールー棚酸系の電解液
に比較して、極めて低い比低抗値を示し、電解コンデン
サの損失、あるいは等価直列抵抗値を著しく低減させる
ことができるが、電解液の耐電圧が低く、中高圧用電解
液には用いることができない。This moisture deteriorates the dielectric oxide film formed on the surface of the electrode foil on the anode side of the electrolytic capacitor, significantly shortening the life of the electrolytic capacitor. In addition, a large amount of water vapor is generated under high temperatures of over 10 psi, which increases the pressure inside the exterior case of the electrolytic capacitor, causing external deformation such as bulging of the stop valve, etc. This causes deterioration of the characteristics associated with these, and it cannot be used for purposes that require excellent electrical characteristics, life characteristics, and high operating temperature limits. In addition, the so-called ethylene glycol-adipic acid electrolyte solution, which is made by dissolving adipic acid or its ammonium salt in a solvent mainly composed of ethylene glycol, has an extremely low Although it shows a low specific resistance value and can significantly reduce the loss or equivalent series resistance value of an electrolytic capacitor, the withstand voltage of the electrolytic solution is low and it cannot be used as an electrolytic solution for medium and high voltages.
本発明の目的は、従来のこのような欠点を改良し、中高
圧用電解液として従釆に比べ、はるかに低い比抵抗値と
、含水量の少ない電解液を得ることにある。An object of the present invention is to improve such conventional drawbacks and to obtain an electrolytic solution for medium and high pressures that has a much lower resistivity value and a lower water content than conventional electrolytes.
本発明者は、炭素数が１６から２２の範囲にあり、側鎖
にァルキル基を有する構造のものから得られた二塩基性
酸、もしくはその塩をエチレングリコールを主体とした
溶媒に溶解した電解液が本発明の目的に合致することを
見出した。The present inventor has developed an electrolysis method in which a dibasic acid obtained from a structure having a carbon number in the range of 16 to 22 and an alkyl group in the side chain, or a salt thereof, is dissolved in a solvent mainly composed of ethylene glycol. It has been found that the solution meets the objectives of the present invention.
本発明の電解液は、炭素数が１６ないし２２で側鎖にア
ルキル基を有する二塩基性酸である、６−エチル−１，
１２ードデカンジカルボン酸、７ーメチルー７ーテトラ
デセン−１，１４ージカルボン酸、７ーメチル−１，１
４ーテトラデカンジカルポン酸、６ーェチルー１，１６
ーヘキサデカンジカルボン酸、７，１２ージメチル−７
，１１−オクタデカジェンー１，１８ージカルボン酸、
７，１２ージメチルー１，１８ーオクタデカンジカルボ
ン酸または、その塩の中から選ばれた１種もしくは２種
以上を溶質として、エチレングリコールを主体とした溶
媒に溶解したことを特徴としている。The electrolytic solution of the present invention is a dibasic acid having 16 to 22 carbon atoms and an alkyl group in the side chain, 6-ethyl-1,
12-dodecanedicarboxylic acid, 7-methyl-7-tetradecene-1,14-dicarboxylic acid, 7-methyl-1,1
4-tetradecanedicarponic acid, 6-ethyl-1,16
-hexadecanedicarboxylic acid, 7,12-dimethyl-7
, 11-octadecadiene-1,18-dicarboxylic acid,
It is characterized in that one or more selected from 7,12-dimethyl-1,18-octadecanedicarboxylic acid or its salts are dissolved in a solvent mainly composed of ethylene glycol as a solute.
一般に直鎖の二塩基性酸またはその塩は、グリコール類
に対する溶解度が低く、殆ど電解液として用いることが
できないが、本発明の如く側鎖にアルキル基を有する二
塩基性酸またはその塩は、前者に比べて溶解度がはるか
に高く、電解液として用いることが可能である。In general, linear dibasic acids or salts thereof have low solubility in glycols and can hardly be used as electrolytes, but dibasic acids or salts thereof having an alkyl group in the side chain as in the present invention, It has much higher solubility than the former and can be used as an electrolyte.
また、二塩基性酸の一般的特徴として、炭素数が多くな
るほどその溶液の比抵抗値は高くなる煩向があるが、本
発明の電解液は炭素数が多いにもかかわらず極めて低い
比抵抗値を示すことが特徴の一つである。In addition, as a general characteristic of dibasic acids, the more carbon numbers there are, the higher the specific resistance value of the solution becomes. However, the electrolytic solution of the present invention has an extremely low specific resistance value despite having a large number of carbon atoms. One of its characteristics is that it indicates a value.
次に、電解液の含水量についてみると、例えば本発明の
二塩基性酸のアンモニウム塩をエチレングリコールに溶
解した場合、エチレングリコールと有機酸によるェステ
ル化反応、有機酸とアンモニアとのアミド化反応で１モ
ルの有機酸から２モルの水が生成し得る。Next, regarding the water content of the electrolytic solution, for example, when the ammonium salt of the dibasic acid of the present invention is dissolved in ethylene glycol, an esterification reaction between ethylene glycol and an organic acid, an amidation reaction between an organic acid and ammonia, etc. 2 moles of water can be produced from 1 mole of organic acid.
しかしこの反応速度は、従釆のエチレングリコール−棚
酸系のェステル化反応ほど速くはなく、ェステル化およ
びアミド化反応による生成水の量は極めて少ない。これ
に対し、従来のエチレングリコールー棚酸系電解液はェ
ステル化反応が容易に進行し、棚酸１モルから３モルの
水が生成し、電解液中の水分量は極めて多くなる。However, the reaction rate is not as fast as the secondary esterification reaction of ethylene glycol-shelf acid system, and the amount of water produced by the esterification and amidation reactions is extremely small. On the other hand, in the conventional ethylene glycol-shelf acid-based electrolyte, the esterification reaction easily proceeds, and 1 to 3 moles of water are produced, resulting in an extremely large amount of water in the electrolyte.
また、本発明の電解液は溶質量が従釆の棚酸に比べて少
なくてすむこと、溶質の分子量が従来の棚酸に比べて大
きいことからも電解液中の水分量は少なくなるといえる
。〔実施例〕
次に、本発明を具体的な実施例に基いて説明する。Furthermore, since the electrolytic solution of the present invention has a smaller amount of solute than the secondary acid, and the molecular weight of the solute is larger than that of the conventional acid, it can be said that the amount of water in the electrolyte is reduced. [Examples] Next, the present invention will be explained based on specific examples.
実施例は従来の電解液である比較例１なし、し３と本発
明の実施例である本発明例１なし、し９を、以下に述べ
る組成で調製した、そしてこれら実施例のいずれについ
ても比抵抗値（０・肌／３０ｑｏ）（以下Ｒｓと略す）
、電解コンデンサとして使用できる耐電圧（Ｖ）（以下
Ｖｓと略す）、および電解液中の水分含有量（％）（以
下日２０と略す）を測定した。In the examples, conventional electrolytes, Comparative Examples 1 and 3, and examples of the present invention, Invention Examples 1 and 9, were prepared with the compositions described below. Specific resistance value (0・skin/30qo) (hereinafter abbreviated as Rs)
, the withstand voltage (V) (hereinafter abbreviated as Vs) that can be used as an electrolytic capacitor, and the water content (%) in the electrolytic solution (hereinafter abbreviated as Day 20).
以下にその組成と測定結果を示す。なお、組成割合は重
量％（Ｍ％）である。比較例 １
エチレングリコール ６７ｗｔ
％棚酸 １６．５ｗ
ｔ％棚酸アンモニウム １６．５ｗ
ｔ％ＲＳ：１０皿Ｑ，肌、ＶＳ：４０００Ｖ、日２０：
２６，０％比較例 ２エチレングリコール
９０Ｗｔ％アジピン酸アンモニウム
１びｗｔ％ＲＳ：３００Ｑ．仇、ＶＳ
：１００Ｖ、日２０： 〇，５％比較例 ３エチ
レングリコール ９３ｗｔ％オク
タデカンジカルボニノ酸（直鏡） ６ｗｔ％アンモ
ニア ２Ｗｔ％Ｒｓ
：不溶で測定できずＶｓ：− ＱＯ：−
本発明例 １
エチレングリコール ９０Ｗｔ
％６ーェチル−１，１２ードデカンジカルボン酸９Ｗｔ
％アンモニア ＩＷｔ％Ｒ
Ｓ：６５０Ｑ．狐、ＶＳ：５００ＶＨ２０：
０，８％本発明例 ２エチレングリコール
８０Ｗｔ％６−エチル−１，１２ードデカ
ンジカルボン酸１８Ｗｔ％アンモニア
２Ｗｔ％ＲＳ：４５０Ｑ．肌、ＶＳ
：４００ＶＨ２０： ０，５％本発明例 ３エ
チレングリコール ７８ｗｔ％６
−エチル−１，１２ードデカンジカルボン酸１８Ｗｔ％
棚酸 ２Ｗｔ％
アンモニア ２Ｗｔ
％ＲＳ：４４０Ｑ，弧、ＶＳ：４５０Ｖ、日２０：
２，１％本発明例 ４エチレングリコール
８０Ｗｔ％７−メチル−７ーテトラデ
センー１，１４ージカルボン酸
ｌａｍ％アンモニア
２Ｗｔ％ＲＳ：４００Ｑ，肌、ＶＳ：４００Ｖ
Ｈ２０： ０，５％本発明例 ５エチレングリ
コール ８０Ｗｔ％７−メチル一
１，１４ーテトラデカンジカルボン酸
１柵ｔ％アンモニア
２ｗｔ％ＲＳ：４８０Ｑ．肌、ＶＳ：４０
０ＶＨ２０： 〇．６％本発明例 ６エチレン
グリコール ８０Ｗｔ％６ーエチ
ル−１，１６ーヘキサデカンジカルボン酸
１榊ｔ％アンモニア
２ｗｔ％ＲＳ：４６０Ｑ．弧、ＶＳ：４００ＶＨ２０：
０，４％本発明例 ７エチレングリコール
８０ｗｔ％７，１２ージメチル
ー７，１１ーオクタデカジェン−１，１＆ージカルボン
酸１８Ｗｔ％
アンモニア ２Ｗｔ
％ＲＳ：４７０Ｑ，仇、ＶＳ：４００ＶＨ２０：
０，４％本発明例 ８エチレングリコール
８０Ｗｔ％７，１２ージメチルー１，
１８−オクタデカンジカルボン酸
１鋤ｔ％アンモニア
２Ｗｔ％ＲＳ：４４０Ｑ，奴、ＶＳ：４００Ｖ、日２０
： ０，５％本発明例 ９エチレングリコール
７０Ｗｔ％メチルセロソルブ
１仇Ｗｔ％７，１２ージメチ
ルー１，１８−オクタデカンジカルボン酸
１８ｗｔ％アンモニア
２Ｗｔ％ＲＳ：４３０Ｑ．仇、ＶＳ：
４００ＶＨ２０： ０，６％これら実施例から
あきらかなように、本発明の電解液は従来のエチレング
リコール、棚酸系電解液（比較例１）に比べ、極めて低
い比抵抗値を示し、含水量も非常に少ないことがわかる
。The composition and measurement results are shown below. In addition, the composition ratio is weight % (M%). Comparative example 1 Ethylene glycol 67wt
% shelf acid 16.5w
t% Ammonium Shelfate 16.5w
t%RS: 10 dishes Q, skin, VS: 4000V, day 20:
26.0% comparative example 2 ethylene glycol
90wt% ammonium adipate
1 and wt%RS: 300Q. Enemy, VS
:100V, Day 20: ○,5% Comparative example 3 Ethylene glycol 93wt% octadecane dicarbonino acid (direct mirror) 6wt% ammonia 2Wt%Rs
: Cannot be measured due to insolubility Vs: - QO: - Invention example 1 Ethylene glycol 90Wt
%6-ethyl-1,12 dodecanedicarboxylic acid 9Wt
%Ammonia IWt%R
S:650Q. Fox, VS:500VH20:
0.8% Invention Example 2 Ethylene Glycol
80Wt% 6-ethyl-1,12 dodecanedicarboxylic acid 18Wt% Ammonia
2Wt%RS: 450Q. skin, VS
:400VH20: 0.5% Invention example 3 Ethylene glycol 78wt%6
-ethyl-1,12 dodecanedicarboxylic acid 18wt%
Shelf acid 2wt%
Ammonia 2Wt
%RS: 440Q, arc, VS: 450V, day 20:
2.1% Invention example 4 ethylene glycol
80Wt% 7-methyl-7-tetradecene-1,14-dicarboxylic acid
lam% ammonia
2Wt%RS: 400Q, skin, VS: 400V
H20: 0.5% Invention example 5 ethylene glycol 80 Wt% 7-methyl-1,14-tetradecanedicarboxylic acid
1 fence t% ammonia
2wt%RS: 480Q. Skin, VS: 40
0VH20: 〇. 6% Inventive example 6 ethylene glycol 80 Wt% 6-ethyl-1,16-hexadecanedicarboxylic acid
1 Sakaki t% ammonia
2wt%RS: 460Q. Arc, VS:400VH20:
0.4% Invention Example 7 Ethylene Glycol
80wt%7,12-dimethyl-7,11-octadecadiene-1,1&-dicarboxylic acid 18wt% Ammonia 2Wt
%RS:470Q, enemy, VS:400VH20:
0.4% Invention example 8 ethylene glycol
80Wt%7,12-dimethyl-1,
18-octadecanedicarboxylic acid
1 plow t% ammonia
2Wt%RS: 440Q, guy, VS: 400V, day 20
: 0.5% Invention Example 9 Ethylene Glycol
70wt% methyl cellosolve
1. Wt% 7,12-dimethyl-1,18-octadecanedicarboxylic acid
18wt% ammonia
2Wt%RS: 430Q. Enemy, VS:
400VH20: 0.6% As is clear from these examples, the electrolytic solution of the present invention exhibits an extremely low resistivity value and a low water content compared to the conventional ethylene glycol and acid-based electrolytic solution (Comparative Example 1). It turns out that there are very few.
また、比較例２のエチレングリコールーアジピン酸系電
解液は、本発明の電解液よりさらに低い比抵抗値を示す
が、電解コンデンサとしての耐圧は１００Ｖ以下であり
、本発明の目的とする中高圧用電解コンデンサに使用す
ることはできない。Furthermore, although the ethylene glycol-adipic acid electrolyte of Comparative Example 2 exhibits a resistivity value that is even lower than that of the electrolyte of the present invention, its withstand voltage as an electrolytic capacitor is 100 V or less, which is the medium-high voltage target of the present invention. It cannot be used for electrolytic capacitors.
また、本発明例６と総炭素数の等しい直鎖の二塩基性酸
であるオクタデカンジカルボン酸を用いた電解液（比較
例３）は、溶媒のエチレングリコールに不溶で電解液と
しての態をなさない。次に、本発明の電解液と従来の電
解液とを用いて電解コンデンサを製作し、その特性比較
をおこなった結果を示す。製作した電解コンデンサは、
陽極側電極として高純度のアルミニウムの表面に、エッ
チングによる拡面処理を施した後、その表面に６９０Ｖ
の電圧で陽極酸化をおこない譲電体酸化皮膜を形成した
。Furthermore, an electrolytic solution (Comparative Example 3) using octadecanedicarboxylic acid, which is a linear dibasic acid having the same total carbon number as Invention Example 6, is insoluble in the solvent ethylene glycol and does not act as an electrolytic solution. do not have. Next, the results of fabricating an electrolytic capacitor using the electrolytic solution of the present invention and a conventional electrolytic solution and comparing their characteristics will be shown. The manufactured electrolytic capacitor is
After enlarging the surface of high-purity aluminum as the anode side electrode by etching, the surface is heated to 690V.
Anodic oxidation was performed at a voltage of 100 to form a conductor oxide film.
また、陰極側は陽極酸化をおこなわないエッチング処理
までのアルミニウム箔を用い、これら陽極側電極箔と、
陰極側電極箔とを帯状にして対面させ、これら電極箔間
にセパレータ紙を介在させて巻回してコンデンサ素子を
形成した。そして、このコンデンサ素子に本発明例ある
いは比較例の電解液を含浸した上で、外装ケースにコン
デンサ素子を収納し、・外装ケースの開□部を弾性封口
部材で密封したものである。In addition, the cathode side uses aluminum foil that has not been anodized but has been subjected to etching treatment, and these anode side electrode foils and
A capacitor element was formed by forming the electrode foils on the cathode side into strips and facing each other, and winding the electrode foils with separator paper interposed between them to form a capacitor element. After impregnating this capacitor element with the electrolytic solution of the present invention or comparative example, the capacitor element was housed in an outer case, and the opening of the outer case was sealed with an elastic sealing member.
なお、この試作した電解コンデンサの定格は、４００Ｖ
、１０山Ｆ、ケースサイズは１６０×３０そである。The rating of this prototype electrolytic capacitor is 400V.
, 10 mounts F, case size is 160 x 30 sleeves.
第１表は上記試作電解コソデンサの初期特性（ねｎ６、
漏れ電流、等価直列抵抗値）についての測定結果を示し
たものである。Table 1 shows the initial characteristics (n6,
This figure shows the measurement results for leakage current and equivalent series resistance.
第１表
この結果からわかるように、本発明の電解液を用いた電
解コンデンサは、初期特性において、従釆の電解液（エ
チレングリコール−棚酸系）を用いたものに比べ、１２
０ＨＺでの損失（Ｇｎ６）で約２／３、１皿日２での等
価直列抵抗値で約１／３の低い値が得られた。Table 1 As can be seen from the results, the initial characteristics of the electrolytic capacitor using the electrolyte of the present invention are 12
A low value of about 2/3 of the loss at 0 HZ (Gn6) and about 1/3 of the equivalent series resistance value after one plate day 2 was obtained.
第２表は、前記の試作電解コンデンサを１１０℃の高温
下で４００Ｖの定格電圧を印加して１００畑時間の負荷
寿命試験をおこなった結果（ｔａｎ６、漏れ電流、外観
不良）を示したものである。Table 2 shows the results of a load life test (tan6, leakage current, appearance defect) of the prototype electrolytic capacitor described above for 100 field hours by applying a rated voltage of 400V at a high temperature of 110°C. be.
第２表
この寿命試験結果からわかるように、本発明の電解液を
用いた電解コンデンサは、１００加時間の高温負荷試験
後も電気特性は初期値に比べ殆ど変化が認められない。Table 2 As can be seen from the life test results, in the electrolytic capacitor using the electrolytic solution of the present invention, almost no change in electrical characteristics was observed compared to the initial value even after a high temperature load test of 100 hours.
また外観不良も皆無であった。これに対し、従来の電解
液を用いた電解コンデンサは、電気特性の劣化が著しく
、しかも内圧上昇により封口部材の飛び出し、防嬢弁の
作動等による外観不良がＩＭ固中８個に達した。〔発明
の効果〕
以上述べたように、本発明の電解液は電解コンデンサの
中高圧用電解液としてきわめて低い比抵抗値を示し、電
解コンデンサの損失、等価直列抵抗値の低減に寄与する
。There was also no appearance defect. On the other hand, electrolytic capacitors using conventional electrolytic solutions had significant deterioration in electrical characteristics, and moreover, eight IM capacitors suffered from poor appearance due to the sealing member popping out due to increased internal pressure, the activation of the stop valve, etc. [Effects of the Invention] As described above, the electrolytic solution of the present invention exhibits an extremely low specific resistance value as an electrolytic solution for medium and high voltages of electrolytic capacitors, and contributes to reducing the loss and equivalent series resistance value of electrolytic capacitors.
特に電解コンデンサのインピーダンス一周波数特性にお
いて、インピーダンスの共振周波数近傍の１雌ＨＺない
し３皿日２程度の高周波領域でのインピーダンスは、前
記等価直列抵抗値によってその大半が決定されるので、
等価直列抵抗値の低減は高周波でのインピーダンス値を
下げ、高周波での特性の優れた電解コンデンサを得るこ
とできる。In particular, in the impedance-frequency characteristic of an electrolytic capacitor, the impedance in the high frequency region of 1 HZ to 3 HZ near the resonance frequency of the impedance is largely determined by the equivalent series resistance value.
Reducing the equivalent series resistance value lowers the impedance value at high frequencies, making it possible to obtain an electrolytic capacitor with excellent characteristics at high frequencies.
また、本発明の電解液は電解液中の含水量が極めて少な
いために、陽極側電極表面に形成された誘電体酸化皮膜
の劣化を抑制することができる。そして、高温での使用
においても、含水量が少ないので蒸気圧の上昇が殆どな
く、内圧上昇による外形変化もないことから、高温下で
の寿命特性の優れた電解コンデンサを得ることができる
。このことは、例えば高周波における低インピーダンス
特性と、高い使用温度上限が要求されるスイッチングレ
ギュレータの平滑回路用電解コンデンサなどに好適であ
る。また、この例に限らず各種通信機器、計測機器など
、優れた電気特性と高度の信頼性が要求される分野にお
いても、本発明の電解液を用いた電解コンデンサが優れ
た特性を発揮することができる。Further, since the electrolytic solution of the present invention has an extremely low water content, it is possible to suppress deterioration of the dielectric oxide film formed on the surface of the anode side electrode. Even when used at high temperatures, there is almost no increase in vapor pressure due to the low water content, and there is no change in external shape due to increase in internal pressure, making it possible to obtain an electrolytic capacitor with excellent life characteristics at high temperatures. This is suitable, for example, for electrolytic capacitors for smoothing circuits of switching regulators that require low impedance characteristics at high frequencies and a high upper limit of operating temperature. Furthermore, the electrolytic capacitor using the electrolyte of the present invention exhibits excellent characteristics not only in this example but also in fields where excellent electrical characteristics and high reliability are required, such as various communication devices and measuring instruments. I can do it.
Claims (1)
−メチル−７−テトラデセン−１，１４−ジカルボン酸
、７−メチル−１，１４−テトラデカンジカルボン酸、
６−エチル−１，１６−ヘキサデカンジカルボン酸、７
，１２−ジメチル−７，１１−オクタデカジエン−１，
１８−ジカルボン酸、７，１２−ジメチル−１，１８−
オクタデカンジカルボン酸または、その塩の中から選ば
れた１種もしくは２種以上を溶質として、エチレングリ
コールを主体とした溶媒に溶解してなる電解コンデンサ
駆動用電解液。1 6-ethyl-1,12-dodecanedicarboxylic acid, 7
-Methyl-7-tetradecene-1,14-dicarboxylic acid, 7-methyl-1,14-tetradecanedicarboxylic acid,
6-ethyl-1,16-hexadecanedicarboxylic acid, 7
, 12-dimethyl-7,11-octadecadiene-1,
18-dicarboxylic acid, 7,12-dimethyl-1,18-
An electrolytic solution for driving an electrolytic capacitor, which is obtained by dissolving one or more selected from octadecane dicarboxylic acid or its salts as a solute in a solvent mainly composed of ethylene glycol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10212880A JPS6025891B2 (en) | 1980-07-25 | 1980-07-25 | Electrolyte for driving electrolytic capacitors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10212880A JPS6025891B2 (en) | 1980-07-25 | 1980-07-25 | Electrolyte for driving electrolytic capacitors |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5727013A JPS5727013A (en) | 1982-02-13 |
| JPS6025891B2 true JPS6025891B2 (en) | 1985-06-20 |
Family
ID=14319136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10212880A Expired JPS6025891B2 (en) | 1980-07-25 | 1980-07-25 | Electrolyte for driving electrolytic capacitors |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6025891B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60132313A (en) * | 1983-12-20 | 1985-07-15 | 日本ケミコン株式会社 | Electrolyte for electrolytic condenser |
| JPS6430209A (en) * | 1987-07-27 | 1989-02-01 | Elna Co Ltd | Electrolyte for driving electrolytic capacitor |
| JPS6431408A (en) * | 1987-07-28 | 1989-02-01 | Elna Co Ltd | Electrolyte for driving electrolytic capacitor |
| JP2815390B2 (en) * | 1989-04-18 | 1998-10-27 | 松下電器産業株式会社 | Electrolyte for driving electrolytic capacitors |
| US7214328B2 (en) | 2001-12-11 | 2007-05-08 | Okamura Oil Mill, Ltd. | Composition for electrolytic solution and process for producing the same |
-
1980
- 1980-07-25 JP JP10212880A patent/JPS6025891B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5727013A (en) | 1982-02-13 |
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