JPH0629157A - Electrolyte for electrolytic capacitor - Google Patents
Electrolyte for electrolytic capacitorInfo
- Publication number
- JPH0629157A JPH0629157A JP18217792A JP18217792A JPH0629157A JP H0629157 A JPH0629157 A JP H0629157A JP 18217792 A JP18217792 A JP 18217792A JP 18217792 A JP18217792 A JP 18217792A JP H0629157 A JPH0629157 A JP H0629157A
- Authority
- JP
- Japan
- Prior art keywords
- electrolytic capacitor
- boric acid
- electrolytic solution
- ethylene glycol
- 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.)
- Pending
Links
- 239000003990 capacitor Substances 0.000 title claims abstract description 33
- 239000003792 electrolyte Substances 0.000 title abstract description 9
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 57
- 239000004327 boric acid Substances 0.000 claims abstract description 20
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims abstract description 16
- -1 Boric acid ester Chemical class 0.000 claims abstract description 14
- 239000002904 solvent Substances 0.000 claims abstract description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims abstract description 5
- 239000008151 electrolyte solution Substances 0.000 claims description 41
- 150000005846 sugar alcohols Polymers 0.000 claims description 9
- FBPFZTCFMRRESA-KVTDHHQDSA-N D-Mannitol Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-KVTDHHQDSA-N 0.000 claims description 6
- 229930195725 Mannitol Natural products 0.000 claims description 6
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims description 6
- 239000000594 mannitol Substances 0.000 claims description 6
- 235000010355 mannitol Nutrition 0.000 claims description 6
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 4
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 claims description 4
- 150000001450 anions Chemical class 0.000 claims description 3
- 150000001768 cations Chemical class 0.000 claims description 3
- BMRWNKZVCUKKSR-UHFFFAOYSA-N butane-1,2-diol Chemical compound CCC(O)CO BMRWNKZVCUKKSR-UHFFFAOYSA-N 0.000 claims description 2
- 235000011187 glycerol Nutrition 0.000 claims description 2
- 235000013772 propylene glycol Nutrition 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 15
- 238000010438 heat treatment Methods 0.000 abstract description 5
- 238000006386 neutralization reaction Methods 0.000 abstract description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 9
- VBICKXHEKHSIBG-UHFFFAOYSA-N 1-monostearoylglycerol Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(O)CO VBICKXHEKHSIBG-UHFFFAOYSA-N 0.000 description 6
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 5
- 238000007796 conventional method Methods 0.000 description 5
- 230000007774 longterm Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 229940075507 glyceryl monostearate Drugs 0.000 description 3
- 239000001788 mono and diglycerides of fatty acids Substances 0.000 description 3
- CXMXRPHRNRROMY-UHFFFAOYSA-N sebacic acid Chemical compound OC(=O)CCCCCCCCC(O)=O CXMXRPHRNRROMY-UHFFFAOYSA-N 0.000 description 3
- PUPZLCDOIYMWBV-UHFFFAOYSA-N (+/-)-1,3-Butanediol Chemical compound CC(O)CCO PUPZLCDOIYMWBV-UHFFFAOYSA-N 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- BDJRBEYXGGNYIS-UHFFFAOYSA-N nonanedioic acid Chemical compound OC(=O)CCCCCCCC(O)=O BDJRBEYXGGNYIS-UHFFFAOYSA-N 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- VZSRBBMJRBPUNF-UHFFFAOYSA-N 2-(2,3-dihydro-1H-inden-2-ylamino)-N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]pyrimidine-5-carboxamide Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C(=O)NCCC(N1CC2=C(CC1)NN=N2)=O VZSRBBMJRBPUNF-UHFFFAOYSA-N 0.000 description 1
- OTRAYOBSWCVTIN-UHFFFAOYSA-N OB(O)O.OB(O)O.OB(O)O.OB(O)O.OB(O)O.N.N.N.N.N.N.N.N.N.N.N.N.N.N.N Chemical compound OB(O)O.OB(O)O.OB(O)O.OB(O)O.OB(O)O.N.N.N.N.N.N.N.N.N.N.N.N.N.N.N OTRAYOBSWCVTIN-UHFFFAOYSA-N 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- SATJMZAWJRWBRX-UHFFFAOYSA-N azane;decanedioic acid Chemical compound [NH4+].[NH4+].[O-]C(=O)CCCCCCCCC([O-])=O SATJMZAWJRWBRX-UHFFFAOYSA-N 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002828 nitro derivatives Chemical class 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 150000003014 phosphoric acid esters Chemical class 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電解コンデンサ用電解
液の改良に関し、更に詳しくは高温での寿命特性の長期
安定化を実現した高圧用電解コンデンサ用電解液に関す
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 electrolytic capacitors, and more particularly to an electrolytic solution for high-voltage electrolytic capacitors which realizes long-term stability of life characteristics at high temperatures.
【０００２】[0002]
【従来の技術】電解コンデンサ用電解液は、アルミニウ
ムまたはタンタルなどの表面に絶縁性の酸化被膜が形成
された弁金属を陽極電極に使用し、前記酸化被膜層を誘
電体とし、この酸化被膜層の表面に電解質層となる電解
液を接触させ、さらに通常陰極と称する集電用の電極を
配置して構成されている。2. Description of the Related Art An electrolytic solution for electrolytic capacitors uses a valve metal, such as aluminum or tantalum, having an insulating oxide film formed on its surface as an anode electrode, and uses the oxide film layer as a dielectric material. The surface of the electrode is brought into contact with an electrolytic solution to form an electrolyte layer, and a current collecting electrode usually called a cathode is arranged.
【０００３】電解コンデンサ用電解液は、上述のように
誘電体層に直接に接触し、真の陰極として作用する。即
ち、電解液は電解コンデンサの誘電体層と集電陰極との
間に介在して、電解液の抵抗分が電解コンデンサに直列
に挿入されていることになる。故に、その電解液の特性
が電解コンデンサ特性を左右する大きな要因となる。The electrolytic solution for electrolytic capacitors is in direct contact with the dielectric layer as described above and acts as a true cathode. That is, the electrolytic solution is interposed between the dielectric layer of the electrolytic capacitor and the collecting cathode, and the resistance of the electrolytic solution is inserted in series with the electrolytic capacitor. Therefore, the characteristics of the electrolytic solution are a major factor influencing the characteristics of the electrolytic capacitor.
【０００４】従来、高圧用電解コンデンサの電解液は、
エチレングリコールを主体とする溶媒中に、セバシン
酸、アゼライン酸、デカンジカルボン酸などの有機酸を
アニオン源とし、アンモニウムをカチオン源とする電解
液が使用されているが、充分な長寿命特性が得られてい
ない。また、エチレングリコールを主体とする溶媒中
に、ホウ酸のアンモニウム塩を主溶質とする系も使用さ
れているが、高温度条件下（１００℃以上）で使用する
とホウ酸とエチレングリコールとからホウ酸エステルが
形成されるときに生成する水の影響により高温度条件下
での使用が不可能であつた。Conventionally, the electrolytic solution of a high voltage electrolytic capacitor is
Electrolytes with organic acids such as sebacic acid, azelaic acid, and decanedicarboxylic acid as anion sources and ammonium as a cation source are used in a solvent consisting mainly of ethylene glycol, but sufficient long-life characteristics are obtained. Has not been done. In addition, a system having an ammonium salt of boric acid as a main solute in a solvent mainly composed of ethylene glycol is also used. However, when used under high temperature conditions (100 ° C. or higher), boric acid and ethylene glycol react Due to the effect of water generated when the acid ester was formed, it could not be used under high temperature conditions.
【０００５】[0005]
【発明が解決しようとする課題】本発明の目的は、高温
で長寿命化を実現する高圧用電解コンデンサ用電解液を
提供することにある。SUMMARY OF THE INVENTION It is an object of the present invention to provide an electrolytic solution for a high voltage electrolytic capacitor which has a long life at high temperatures.
【０００６】[0006]
【課題を解決するための手段】本発明者等は、高圧用電
解コンデンサの電解液につき鋭意検討した結果、エチレ
ングリコールを主体とする溶媒中に、ホウ酸とアンモニ
ウムを主溶質とする電解液において、ホウ酸と多価アル
コールとのホウ酸エステルを形成せしめ、また生成した
水分を３％以下に減少させることによつて、高圧用電解
コンデンサの高温での長寿命化を実現することができる
ことを突き止め、本発明を完成した。Means for Solving the Problems As a result of intensive studies made by the present inventors on an electrolytic solution for a high-voltage electrolytic capacitor, in an electrolytic solution containing boric acid and ammonium as a main solute in a solvent containing ethylene glycol as a main component, By forming a borate ester of boric acid and a polyhydric alcohol and reducing the generated water to 3% or less, it is possible to realize a long life at high temperature of a high voltage electrolytic capacitor. As a result, they have completed the present invention.
【０００７】したがつて、エチレングリコールを主体と
する溶媒中で、ホウ酸と多価アルコールとのホウ酸エス
テルをアニオン源とし、アンモニウムをカチオン源とす
る電解液であつて、電解液中の水分率を３％以下にする
ことを特徴とする電解コンデンサ用電解液を提供する。Therefore, in a solvent containing ethylene glycol as a main component, a boric acid ester of boric acid and a polyhydric alcohol is used as an anion source, and ammonium is used as a cation source. Provided is an electrolytic solution for an electrolytic capacitor, which has a ratio of 3% or less.
【０００８】本発明によれば、エチレングリコール中
に、多価アルコールとホウ酸を添加し、攪拌しながら開
放状態で１００−１３０℃で加熱し、ホウ酸エステルの
形成によつて生成する水分が３％以下になるまで加熱を
継続し、次いで冷却後アンモニアガスを攪拌しながら注
入して中和反応を行う。さらに必要に応じて電解コンデ
ンサの特性が安定する添加剤（ニトロ化合物、酸性リン
酸エステルなど）を適量添加することによつて、所望の
電解液を得ることが出来る。According to the present invention, a polyhydric alcohol and boric acid are added to ethylene glycol, and the mixture is heated at 100 to 130 ° C. in an open state with stirring to remove water generated by the formation of borate ester. The heating is continued until it becomes 3% or less, and after cooling, ammonia gas is injected with stirring to carry out a neutralization reaction. Further, a desired electrolytic solution can be obtained by adding an appropriate amount of additive (nitro compound, acidic phosphoric acid ester, etc.) that stabilizes the characteristics of the electrolytic capacitor, if necessary.
【０００９】多価アルコールは好適には、エチレングリ
コール、グリセリン、プロピレングリコール、マンニト
ール、１，２−ブタンジオール、およびペンタエリスリ
トールである。多価アルコールの添加量は、エチレング
リコール１００重量部に対して０．１乃至５０重量部が
好適である。The polyhydric alcohols are preferably ethylene glycol, glycerin, propylene glycol, mannitol, 1,2-butanediol, and pentaerythritol. The amount of polyhydric alcohol added is preferably 0.1 to 50 parts by weight with respect to 100 parts by weight of ethylene glycol.
【００１０】ホウ酸の添加量は好適には、エチレングリ
コール１００重量部に対して１乃至５０重量部である。The addition amount of boric acid is preferably 1 to 50 parts by weight based on 100 parts by weight of ethylene glycol.
【００１１】本発明による電解液の使用により、従来の
電解液と比較して、高圧用電解コンデンサの高温での寿
命特性の長期安定性が約３０％以上向上する。By using the electrolytic solution according to the present invention, the long-term stability of the life characteristics at high temperature of the high-voltage electrolytic capacitor is improved by about 30% or more as compared with the conventional electrolytic solution.
【００１２】[0012]
【作用】高圧用電解コンデンサの電解液において、溶質
として使用されるホウ酸を多価アルコールと加熱して予
めホウ酸エステルとし、そのとき生成する水分を加熱蒸
発により予め除去した電解液を使用すると、電解コンデ
ンサ製品は高温に於いても電解液中の水分による損傷お
よび寿命特性の低下を回避することができて、電解コン
デンサ製品の長寿命化が達成される。[Function] In an electrolytic solution for a high-voltage electrolytic capacitor, when boric acid used as a solute is heated with a polyhydric alcohol to form a borate ester in advance, and water produced at that time is removed by heating and evaporation in advance, The electrolytic capacitor product can avoid damages due to water in the electrolytic solution and deterioration of life characteristics even at high temperatures, and thus the electrolytic capacitor product can have a long life.
【００１３】[0013]
【実施例】以下、実施例により本発明を詳細に説明す
る。The present invention will be described in detail below with reference to examples.
【００１４】実施例１および比較例１ １）電解液の調製 比較例１として、従来から用いられている次の組成の電
解液を常法により調製して使用した。 Example 1 and Comparative Example 1 1) Preparation of Electrolyte Solution As Comparative Example 1, an electrolyte solution having the following composition conventionally used was prepared by a conventional method and used.
【００１５】 比較例１の電解液組成 成 分 重量（ｇ） エチレングリコール １００ セバシン酸ジアンモニウム ４ ホウ酸 ５ マンニトール ３ ポリビニルアルコール ３Composition of Electrolyte Solution of Comparative Example 1 Component Weight (g) Ethylene glycol 100 Diammonium sebacate 4 Boric acid 5 Mannitol 3 Polyvinyl alcohol 3
【００１６】この電解液試料の伝導度（３０℃）は１．
００ｍｓ／ｃｍであり、水分率は３．７０％であつた。The conductivity (30 ° C.) of this electrolyte sample was 1.
The water content was 00 ms / cm, and the water content was 3.70%.
【００１７】実施例１として、次の電解液原料組成に従
い、エチレングリコール１００ｇ中に、マンニトール１
０ｇとホウ酸１５ｇを添加し、攪拌しながら開放状態で
１２０−１３０℃で加熱した。ホウ酸エステルの形成に
よつて生成する水分が３％以下になるまで加熱を継続し
た。次いで冷却後、攪拌しながらアンモニアガス１．４
リットルを注入して、ｐＨ６に調節した。さらにポリオ
キシエチレングリセリルモノステアレート２ｇを添加し
て、電解液を調製して使用した。As Example 1, mannitol 1 was added to 100 g of ethylene glycol according to the following composition of the electrolyte solution raw material.
0 g and 15 g of boric acid were added, and the mixture was heated with stirring at 120 to 130 ° C. in an open state. The heating was continued until the water content generated by the borate ester formation was 3% or less. Then, after cooling, stirring with ammonia gas 1.4
The pH was adjusted to 6 by injecting 1 liter. Further, 2 g of polyoxyethylene glyceryl monostearate was added to prepare an electrolytic solution for use.
【００１８】 実施例１の電解液原料組成 成 分 重量（ｇ） エチレングリコール １００ ホウ酸 １５ マンニトール １０ アンモニアガス １．３８リットル ポリオキシエチレン ２ グリセリルモノステアレート （ＰＯＥ＝４０）Electrolyte solution raw material composition of Example 1 Component weight (g) Ethylene glycol 100 Boric acid 15 Mannitol 10 Ammonia gas 1.38 liter Polyoxyethylene 2 glyceryl monostearate (POE = 40)
【００１９】この電解液試料の伝導度（３０℃）は０．
９０９ｍｓ／ｃｍであり、水分率は１．５６％であつ
た。The conductivity (30 ° C.) of this electrolyte sample was 0.
It was 909 ms / cm and the water content was 1.56%.
【００２０】２）製品寿命特性の測定 上記の電解液試料を、製品定格電圧４００Ｖ、製品定格
容量２２μＦの素子に含浸させて、常法により電解コン
デンサ製品を作成した。2) Measurement of product life characteristics An element having a product rated voltage of 400 V and a product rated capacity of 22 μF was impregnated with the above electrolytic solution sample to prepare an electrolytic capacitor product by a conventional method.
【００２１】この電解コンデンサ製品試料２０サンプル
を、定格電圧４００Ｖに印加した条件下で１３０℃で２
０００時間処理した後、製品寿命特性を検討した。Twenty samples of this electrolytic capacitor product sample were applied at a rated voltage of 400 V at 130 ° C. for 2 hours.
After treating for 000 hours, the product life characteristics were examined.
【００２２】この処理電解コンデンサ製品試料につい
て、製品寿命特性として静電容量、損失角の正接、およ
び漏れ電流を測定した。測定方法は常法で行つた。処理
試料２０サンプルの測定値の平均値を算出した結果を表
１に示す。With respect to the product sample of this treated electrolytic capacitor, capacitance, loss tangent, and leakage current were measured as product life characteristics. The measuring method was a conventional method. Table 1 shows the result of calculating the average value of the measured values of the 20 treated samples.
【００２３】[0023]
【表１】 [Table 1]
【００２４】実施例１は比較例１と比べて、静電容量変
化率が５３．５％の減少を示し、また損失角の正接にお
いて２９．２％、漏れ電流において２２．４％の改善が
見られたことから、本発明に係る電解液を使用した電解
コンデンサが、高電圧条件下で高温において長期に安定
性を有することを確認した。Example 1 shows a decrease in capacitance change rate of 53.5% as compared with Comparative Example 1, and an improvement of 29.2% in tangent of loss angle and 22.4% in leakage current. From the observation, it was confirmed that the electrolytic capacitor using the electrolytic solution according to the present invention has long-term stability at high temperature under high voltage conditions.
【００２５】実施例２および比較例２ １）電解液の調製 比較例２として、従来から用いられている次の組成の電
解液を常法により調製して使用した。 Example 2 and Comparative Example 2 1) Preparation of Electrolyte Solution As Comparative Example 2, an electrolyte solution having the following composition conventionally used was prepared by a conventional method and used.
【００２６】 比較例２の電解液組成 成 分 重量（ｇ） エチレングリコール １００ 五ホウ酸アンモニウム １０ マンニトール １０ ポリオキシエチレン ２ グリセリルモノステアレート （ＰＯＥ＝４０）Composition of Electrolyte Solution of Comparative Example 2 Component Weight (g) Ethylene glycol 100 Ammonium pentaborate 10 Mannitol 10 Polyoxyethylene 2 Glyceryl monostearate (POE = 40)
【００２７】この電解液試料の伝導度（３０℃）は０．
８１８ｍｓ／ｃｍであり、水分率は６．５９％であつ
た。The conductivity (30 ° C.) of this electrolyte sample was 0.
The water content was 818 ms / cm and the water content was 6.59%.
【００２８】実施例２として、次の電解液原料組成に従
い、エチレングリコール８５ｇと１，３−ブタンジオー
ル１５ｇの混合物中に、ペンタエリスリトール１０ｇと
ホウ酸１０ｇを添加し、攪拌しながら開放状態で１２０
−１３０℃で加熱した。ホウ酸エステルの形成によつて
生成する水分が３％以下になるまで加熱を継続した。次
いで冷却後、攪拌しながらアンモニアガス０．９リット
ルを注入して、ｐＨ６に調節した。さらにポリオキシエ
チレングリセリルモノステアレート２ｇを添加して、電
解液を調製して使用した。As Example 2, 10 g of pentaerythritol and 10 g of boric acid were added to a mixture of 85 g of ethylene glycol and 15 g of 1,3-butanediol according to the following composition of the electrolyte solution, and the mixture was left open while stirring.
Heated at -130 ° C. The heating was continued until the water content generated by the borate ester formation was 3% or less. Then, after cooling, 0.9 liter of ammonia gas was injected with stirring to adjust the pH to 6. Further, 2 g of polyoxyethylene glyceryl monostearate was added to prepare an electrolytic solution for use.
【００２９】 実施例２の電解液原料組成 成 分 重量（ｇ） エチレングリコール １００５ ホウ酸 １０ ペンタエリスリトール １０ アンモニアガス ０．９２リットル ポリオキシエチレン ２ グリセリルモノステアレート （ＰＯＥ＝４０）Component Composition of Electrolyte Solution of Example 2 Weight (g) Ethylene glycol 1005 Boric acid 10 Pentaerythritol 10 Ammonia gas 0.92 liter Polyoxyethylene 2 glyceryl monostearate (POE = 40)
【００３０】この電解液試料の伝導度（３０℃）は１．
０５ｍｓ／ｃｍであり、水分率は２．０８％であつた。The conductivity (30 ° C.) of this electrolyte sample was 1.
It was 05 ms / cm and the water content was 2.08%.
【００３１】２）製品寿命特性の測定 上記の電解液試料を、製品定格電圧４００Ｖ、製品定格
容量２２μＦの素子に含浸させて、電解コンデンサ製品
を作成した。2) Measurement of product life characteristics An electrolytic capacitor product was prepared by impregnating an element having a product rated voltage of 400 V and a product rated capacity of 22 μF with the above electrolyte solution sample.
【００３２】この電解コンデンサ製品試料２０サンプル
を、定格電圧４００Ｖに印加した条件下で１３０℃で２
０００時間処理した後、製品寿命特性を検討した。Twenty samples of this electrolytic capacitor product sample were heated at 130 ° C. for 2 hours under the condition that a rated voltage of 400 V was applied.
After treating for 000 hours, the product life characteristics were examined.
【００３３】この処理電解コンデンサ製品試料につい
て、製品寿命特性として静電容量、損失角の正接、およ
び漏れ電流を測定した。測定方法は常法で行つた。処理
試料２０サンプルの測定値の平均値を算出した結果を表
２に示す。尚、比較例２の１３０℃、２０００時間処理
後の製品試料は、２０サンプルの内２０サンプルが開弁
したので、製品寿命特性が測定できなかつた。With respect to the product sample of this treated electrolytic capacitor, capacitance, loss tangent, and leakage current were measured as product life characteristics. The measuring method was a conventional method. Table 2 shows the result of calculating the average value of the measured values of the 20 treated samples. In addition, in the product sample after the treatment at 130 ° C. for 2000 hours in Comparative Example 2, 20 of the 20 samples were opened, so the product life characteristics could not be measured.
【００３４】[0034]
【表２】 [Table 2]
【００３５】比較例２の電解液は水分率が６．５９％と
高く、１３０℃、２０００時間の処理中に電解コンデン
サ製品試料２０サンプルのすべてが開弁して、高温度で
長期間の使用に耐えないことを示した。The electrolytic solution of Comparative Example 2 has a high moisture content of 6.59%, and all 20 samples of electrolytic capacitor product samples were opened during the treatment at 130 ° C. for 2000 hours, so that the electrolytic solution was used for a long time at high temperature. I showed that I could not stand it.
【００３６】一方、本発明に係る電解液を使用した実施
例２の電解コンデンサ製品試料２０サンプルには損傷は
全く発生せず、長期間の高温度に耐性を示した。また製
品寿命特性の測定値においても、実施例１の試料と同様
に高電圧条件下で高温において長期に安定性を有するこ
とを確認した。On the other hand, 20 samples of electrolytic capacitor product samples of Example 2 using the electrolytic solution according to the present invention showed no damage at all and showed resistance to high temperature for a long period of time. Also, the measured values of the product life characteristics were confirmed to have long-term stability at high temperature under high voltage conditions as with the sample of Example 1.
【００３７】[0037]
【発明の効果】本発明に係る電解コンデンサ用電解液に
よると、エチレングリコールを主体とする溶媒中で、ホ
ウ酸と多価アルコールとのホウ酸エステルを形成せし
め、かつ電解液中の水分を３％以下にすることによつ
て、高圧用電解コンデンサの高温での寿命特性が長期に
わたつて顕著に安定化するので、その工業的価値が高
い。According to the electrolytic solution for an electrolytic capacitor of the present invention, a boric acid ester of boric acid and a polyhydric alcohol is formed in a solvent mainly composed of ethylene glycol, and the water content in the electrolytic solution is 3%. % Or less, the life characteristics at high temperature of the electrolytic capacitor for high voltage are remarkably stabilized over a long period of time, so that its industrial value is high.
Claims (2)
で、ホウ酸と多価アルコールとのホウ酸エステルをアニ
オン源とし、アンモニウムをカチオン源とする電解液で
あつて、電解液中の水分率を３％以下にすることを特徴
とする電解コンデンサ用電解液。1. An electrolytic solution in which a boric acid ester of boric acid and a polyhydric alcohol is used as an anion source and ammonium is used as a cation source in a solvent containing ethylene glycol as a main component. An electrolytic solution for an electrolytic capacitor, which is 3% or less.
グリセリン、プロピレングリコール、マンニトール、
１，２−ブタンジオール、およびペンタエリスリトール
よりなる群から選択される請求項１記載の電解コンデン
サ用電解液。2. The polyhydric alcohol is ethylene glycol,
Glycerin, propylene glycol, mannitol,
The electrolytic solution for an electrolytic capacitor according to claim 1, which is selected from the group consisting of 1,2-butanediol and pentaerythritol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18217792A JPH0629157A (en) | 1992-07-09 | 1992-07-09 | Electrolyte for electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18217792A JPH0629157A (en) | 1992-07-09 | 1992-07-09 | Electrolyte for electrolytic capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0629157A true JPH0629157A (en) | 1994-02-04 |
Family
ID=16113693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18217792A Pending JPH0629157A (en) | 1992-07-09 | 1992-07-09 | Electrolyte for electrolytic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0629157A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6338806B1 (en) | 1998-08-31 | 2002-01-15 | Matsushita Electric Industrial Co., Ltd. | Electrolytic capacitor and driving electrolyte thereof |
| US20180233292A1 (en) * | 2015-10-30 | 2018-08-16 | Panasonic Intellectual Property Management Co., Ltd. | Electrolytic capacitor and method for manufacturing same |
-
1992
- 1992-07-09 JP JP18217792A patent/JPH0629157A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6338806B1 (en) | 1998-08-31 | 2002-01-15 | Matsushita Electric Industrial Co., Ltd. | Electrolytic capacitor and driving electrolyte thereof |
| US20180233292A1 (en) * | 2015-10-30 | 2018-08-16 | Panasonic Intellectual Property Management Co., Ltd. | Electrolytic capacitor and method for manufacturing same |
| US10692657B2 (en) * | 2015-10-30 | 2020-06-23 | Panasonic Intellectual Property Management Co., Ltd. | Electrolytic capacitor and method for manufacturing same |
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