JP4074382B2 - Electrolytic solution for driving aluminum electrolytic capacitors - Google Patents
Electrolytic solution for driving aluminum electrolytic capacitors Download PDFInfo
- Publication number
- JP4074382B2 JP4074382B2 JP22593298A JP22593298A JP4074382B2 JP 4074382 B2 JP4074382 B2 JP 4074382B2 JP 22593298 A JP22593298 A JP 22593298A JP 22593298 A JP22593298 A JP 22593298A JP 4074382 B2 JP4074382 B2 JP 4074382B2
- Authority
- JP
- Japan
- Prior art keywords
- electrolytic solution
- electrolytic
- driving
- durene
- capacitors
- 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 - Fee Related
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- 239000008151 electrolyte solution Substances 0.000 title claims description 14
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims description 7
- 229910052782 aluminium Inorganic materials 0.000 title claims description 7
- 239000003990 capacitor Substances 0.000 title claims description 7
- SQNZJJAZBFDUTD-UHFFFAOYSA-N durene Chemical compound CC1=CC(C)=C(C)C=C1C SQNZJJAZBFDUTD-UHFFFAOYSA-N 0.000 claims description 22
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 9
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 6
- 239000002904 solvent Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- CYIDZMCFTVVTJO-UHFFFAOYSA-N pyromellitic acid Chemical compound OC(=O)C1=CC(C(O)=O)=C(C(O)=O)C=C1C(O)=O CYIDZMCFTVVTJO-UHFFFAOYSA-N 0.000 description 4
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 2
- WGSMMQXDEYYZTB-UHFFFAOYSA-N 1,2,4,5-tetramethylbenzene Chemical compound CC1=CC(C)=C(C)C=C1C.CC1=CC(C)=C(C)C=C1C WGSMMQXDEYYZTB-UHFFFAOYSA-N 0.000 description 1
- VIERJJBNLVXJIP-UHFFFAOYSA-N C(C=1C(C(=O)O)=CC=CC1)(=O)O.N12CCCN=C2CCC1 Chemical compound C(C=1C(C(=O)O)=CC=CC1)(=O)O.N12CCCN=C2CCC1 VIERJJBNLVXJIP-UHFFFAOYSA-N 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- KPADFPAILITQBG-UHFFFAOYSA-N non-4-ene Chemical compound CCCCC=CCCC KPADFPAILITQBG-UHFFFAOYSA-N 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Electric Double-Layer Capacitors Or The Like (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Description
【０００１】
【発明の属する技術分野】
本発明は、アルミニウム電解コンデンサの駆動用電解液(以下、電解液と称す)の改良において、特に耐水性を改善した電解液に関するものである。
【０００２】
【従来の技術】
従来、低圧用のアルミニウム電解コンデンサの駆動用電解液としては、γ−ブチロラクトンを主成分とする溶媒に、フタル酸やマレイン酸などのカルボン酸類と、トリエチルアミンや１，５−ジアザビシクロ（４，３，０）ノン−５−エンなどのアミンとの塩を主溶質として溶解した電解液が用いられていた。
【０００３】
【発明が解決しようとする課題】
近年、市場の要求により、耐湿性に優れたアルミニウム電解コンデンサが求められるようになり、それに供する耐湿性の向上を図った電解液が望まれていた。
【０００４】
【課題を解決するための手段】
本発明は、１，２，４，５−テトラメチルベンゼン（以下デュレンと称す）が水を吸収して１，２，４，５−ベンゼンテトラカルボン酸に変化することに注目し、上記課題の解決を図ろうとするものである。
すなわち、γ−ブチロラクトンおよび／またはエチレングリコールを主体とする溶媒に、１，２，４，５−テトラメチルベンゼン（化２）を溶質として０．１〜１０．０ｗｔ％用いることを特徴とするアルミニウム電解コンデンサの駆動用電解液である。
【０００５】
【化２】
【発明の実施の形態】
デュレンは、化２に示される構造を呈し、化３に示される化学反応によって水を吸収し、電解液の信頼性には無害成分の、１，２，４，５−ベンゼンテトラカルボン酸に変化する。よって、電解液にデュレンを添加すると、製品内部に侵入した水分とデュレンが反応することにより、製品の耐湿性を向上させることができる。
【０００７】
【化３】
【実施例】
以下、実施例の具体的内容について説明する。
主溶媒にはγ−ブチロラクトン、副溶媒にはエチレングリコール、主溶質にはフタル酸水素１，５−ジアザビシクロ（４，３，０）ノン−５−エンを用いて電解液を調合した。
上記の電解液と、耐湿性試験用として上記電解液に水５ｗｔ％添加したもの、水５ｗｔ％添加したものに、デュレンを０．０５〜２０ｗｔ％添加したもので比較した。
表１に、上記の実施例１〜５および比較例１〜４の電解液を１０５℃中に放置した後の比抵抗を示す。
水を添加した比較例２に比較して、デュレン添加０．１〜１０ｗｔ％の実施例１〜５では、初期比抵抗に対する２０００時間後の比抵抗の倍率が低くなっている。
尚、デュレン添加量が１０ｗｔ％を超えると溶解しなくなり、また０．１ｗｔ％未満では先の比抵抗倍率に効果がない。よってデュレン添加量は０．１〜１０ｗｔ％の範囲が好ましい。
【０００９】
【表１】
【発明の効果】
上記の如く、デュレン（１，２，４，５−テトラメチルベンゼン）を添加剤として０．１〜１０ｗｔ％用いることを特徴とするアルミニウム電解コンデンサの駆動用電解液は、耐湿性に優れ、市場の要求に充分対応できることが明らかである。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electrolytic solution having improved water resistance especially in improving an electrolytic solution for driving an aluminum electrolytic capacitor (hereinafter referred to as an electrolytic solution).
[0002]
[Prior art]
Conventionally, as an electrolyte for driving a low-pressure aluminum electrolytic capacitor, a solvent mainly composed of γ-butyrolactone, a carboxylic acid such as phthalic acid or maleic acid, triethylamine, or 1,5-diazabicyclo (4,3,4). 0) An electrolytic solution in which a salt with an amine such as non-5-ene was dissolved as a main solute was used.
[0003]
[Problems to be solved by the invention]
In recent years, due to market demand, aluminum electrolytic capacitors having excellent moisture resistance have been demanded, and there has been a demand for an electrolytic solution with improved moisture resistance.
[0004]
[Means for Solving the Problems]
The present invention focuses on the fact that 1,2,4,5-tetramethylbenzene (hereinafter referred to as durene) absorbs water and changes to 1,2,4,5-benzenetetracarboxylic acid. We are going to try to solve it.
That is, aluminum characterized by using 0.1,20.0 wt% of 1,2,4,5-tetramethylbenzene (chemical formula 2) as a solute in a solvent mainly composed of γ-butyrolactone and / or ethylene glycol. An electrolytic solution for driving an electrolytic capacitor.
[0005]
[Chemical 2]
DETAILED DESCRIPTION OF THE INVENTION
Durene has the structure shown in Chemical Formula 2, absorbs water by the chemical reaction shown in Chemical Formula 3, and changes to 1,2,4,5-benzenetetracarboxylic acid, which is harmless to the reliability of the electrolyte. To do. Therefore, when durene is added to the electrolytic solution, moisture entering the inside of the product reacts with durene, so that the moisture resistance of the product can be improved.
[0007]
[Chemical 3]
【Example】
Hereinafter, specific contents of the embodiment will be described.
An electrolyte solution was prepared using γ-butyrolactone as the main solvent, ethylene glycol as the auxiliary solvent, and 1,5-diazabicyclo (4,3,0) non-5-ene hydrogen phthalate as the main solute.
A comparison was made between the above electrolytic solution and the one in which 5 wt% of water was added to the above electrolytic solution for the moisture resistance test, or 0.05 to 20 wt% of durene was added to the one in which 5 wt% of water was added.
Table 1 shows specific resistances after leaving the electrolytic solutions of Examples 1 to 5 and Comparative Examples 1 to 4 at 105 ° C.
Compared with Comparative Example 2 in which water was added, in Examples 1 to 5 in which 0.1 to 10% by weight of durene was added, the ratio of specific resistance after 2000 hours to the initial specific resistance was low.
It should be noted that when the added amount of durene exceeds 10 wt%, it does not dissolve, and when it is less than 0.1 wt%, there is no effect on the previous specific resistance magnification. Therefore, the amount of durene added is preferably in the range of 0.1 to 10 wt%.
[0009]
[Table 1]
【The invention's effect】
As described above, the driving electrolytic solution for aluminum electrolytic capacitors, characterized in that 0.1 to 10 wt% of durene (1,2,4,5-tetramethylbenzene) is used as an additive, has excellent moisture resistance, and is marketed. It is clear that this requirement can be fully met.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22593298A JP4074382B2 (en) | 1998-08-10 | 1998-08-10 | Electrolytic solution for driving aluminum electrolytic capacitors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22593298A JP4074382B2 (en) | 1998-08-10 | 1998-08-10 | Electrolytic solution for driving aluminum electrolytic capacitors |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000058394A JP2000058394A (en) | 2000-02-25 |
| JP4074382B2 true JP4074382B2 (en) | 2008-04-09 |
Family
ID=16837163
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22593298A Expired - Fee Related JP4074382B2 (en) | 1998-08-10 | 1998-08-10 | Electrolytic solution for driving aluminum electrolytic capacitors |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4074382B2 (en) |
-
1998
- 1998-08-10 JP JP22593298A patent/JP4074382B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000058394A (en) | 2000-02-25 |
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