JPH01158715A - Electrolyte for driving electrolytic capacitor - Google Patents
Electrolyte for driving electrolytic capacitorInfo
- Publication number
- JPH01158715A JPH01158715A JP31824087A JP31824087A JPH01158715A JP H01158715 A JPH01158715 A JP H01158715A JP 31824087 A JP31824087 A JP 31824087A JP 31824087 A JP31824087 A JP 31824087A JP H01158715 A JPH01158715 A JP H01158715A
- Authority
- JP
- Japan
- Prior art keywords
- leakage current
- electrolyte
- methyl
- nitrobenzoic acid
- 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.)
- Pending
Links
- 239000003990 capacitor Substances 0.000 title claims abstract description 28
- 239000003792 electrolyte Substances 0.000 title claims abstract description 10
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000002904 solvent Substances 0.000 claims abstract description 8
- DGDAVTPQCQXLGU-UHFFFAOYSA-N 5437-38-7 Chemical compound CC1=CC=CC(C(O)=O)=C1[N+]([O-])=O DGDAVTPQCQXLGU-UHFFFAOYSA-N 0.000 claims abstract description 7
- BNUHAJGCKIQFGE-UHFFFAOYSA-N Nitroanisol Chemical compound COC1=CC=C([N+]([O-])=O)C=C1 BNUHAJGCKIQFGE-UHFFFAOYSA-N 0.000 claims abstract description 7
- 150000007524 organic acids Chemical class 0.000 claims abstract description 6
- 150000003839 salts Chemical class 0.000 claims abstract description 6
- 239000008151 electrolyte solution Substances 0.000 claims description 12
- CCXSGQZMYLXTOI-UHFFFAOYSA-N 13506-76-8 Chemical compound CC1=CC=CC([N+]([O-])=O)=C1C(O)=O CCXSGQZMYLXTOI-UHFFFAOYSA-N 0.000 claims 1
- YPQAFWHSMWWPLX-UHFFFAOYSA-N 1975-50-4 Chemical compound CC1=C(C(O)=O)C=CC=C1[N+]([O-])=O YPQAFWHSMWWPLX-UHFFFAOYSA-N 0.000 claims 1
- CFBYEGUGFPZCNF-UHFFFAOYSA-N 2-nitroanisole Chemical compound COC1=CC=CC=C1[N+]([O-])=O CFBYEGUGFPZCNF-UHFFFAOYSA-N 0.000 claims 1
- XDTTUTIFWDAMIX-UHFFFAOYSA-N 3-methyl-4-nitrobenzoic acid Chemical compound CC1=CC(C(O)=O)=CC=C1[N+]([O-])=O XDTTUTIFWDAMIX-UHFFFAOYSA-N 0.000 claims 1
- WGYFINWERLNPHR-UHFFFAOYSA-N 3-nitroanisole Chemical compound COC1=CC=CC([N+]([O-])=O)=C1 WGYFINWERLNPHR-UHFFFAOYSA-N 0.000 claims 1
- BBEWSMNRCUXQRF-UHFFFAOYSA-N 4-methyl-3-nitrobenzoic acid Chemical compound CC1=CC=C(C(O)=O)C=C1[N+]([O-])=O BBEWSMNRCUXQRF-UHFFFAOYSA-N 0.000 claims 1
- QRRSIFNWHCKMSW-UHFFFAOYSA-N 5-methyl-2-nitrobenzoic acid Chemical compound CC1=CC=C([N+]([O-])=O)C(C(O)=O)=C1 QRRSIFNWHCKMSW-UHFFFAOYSA-N 0.000 claims 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 15
- 229910052782 aluminium Inorganic materials 0.000 abstract description 15
- 150000008282 halocarbons Chemical class 0.000 abstract description 9
- 229910052801 chlorine Inorganic materials 0.000 abstract description 5
- 239000000460 chlorine Substances 0.000 abstract description 5
- -1 chlorine ions Chemical class 0.000 abstract description 5
- 238000000354 decomposition reaction Methods 0.000 abstract 1
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 238000005260 corrosion Methods 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 239000012459 cleaning agent Substances 0.000 description 3
- SLAMLWHELXOEJZ-UHFFFAOYSA-N 2-nitrobenzoic acid Chemical compound OC(=O)C1=CC=CC=C1[N+]([O-])=O SLAMLWHELXOEJZ-UHFFFAOYSA-N 0.000 description 2
- IQUPABOKLQSFBK-UHFFFAOYSA-N 2-nitrophenol Chemical compound OC1=CC=CC=C1[N+]([O-])=O IQUPABOKLQSFBK-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
- 230000000694 effects Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000004506 ultrasonic cleaning Methods 0.000 description 2
- UOCLXMDMGBRAIB-UHFFFAOYSA-N 1,1,1-trichloroethane Chemical compound CC(Cl)(Cl)Cl UOCLXMDMGBRAIB-UHFFFAOYSA-N 0.000 description 1
- 241000208202 Linaceae Species 0.000 description 1
- 235000004431 Linum usitatissimum Nutrition 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 235000011037 adipic acid Nutrition 0.000 description 1
- 239000001361 adipic acid Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明はアルミニウム電解コンデンサをハロゲン化炭化
水素で洗浄した場合にコンデンサ内部にハロゲン化炭化
水素が透過して生ずるコンデンサ素子の腐食を防止し、
かつ低漏れ電流特性を有する電解コンデンサの駆動用電
解液（以下電解液という）に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention prevents corrosion of capacitor elements caused by penetration of halogenated hydrocarbons into the interior of the capacitors when aluminum electrolytic capacitors are cleaned with halogenated hydrocarbons.
The present invention also relates to an electrolytic solution for driving an electrolytic capacitor (hereinafter referred to as electrolytic solution) having low leakage current characteristics.
従来の技術
従来より低漏れ電流用アルミニウム電解コンデンサの電
解液としてエチレングリコールを主溶媒とし、アジピン
酸、セパシン酸などの有機酸あるいはその塩を溶解して
なる電解液が使用されている。またアルミニウム電解コ
ンデンサの電解液ではハロゲン化炭化水素による腐食防
止を目的としてニトロフェノールあるいはニトロ安息香
酸を添加したものが用いられていた。BACKGROUND OF THE INVENTION Conventionally, an electrolytic solution has been used for aluminum electrolytic capacitors for low leakage current, which is made by using ethylene glycol as a main solvent and dissolving an organic acid such as adipic acid or sepacic acid or a salt thereof. In addition, electrolytes for aluminum electrolytic capacitors contain nitrophenol or nitrobenzoic acid to prevent corrosion caused by halogenated hydrocarbons.
発明が解決しようとする問題点
アルミニウム電解コンデンサに対しては、洗浄工程や、
印刷基板へ取り付けする時に用いるハンダフラソクスの
除去工程で、洗浄剤として使用されるハロゲン化炭化水
素への浸漬あるいは蒸気浴などによって、このハロゲン
化炭化水素がゴム栓を透過してコンデンサ内に侵入し、
分解して塩素イオンを生成し、この塩素イオンによって
コンデンサ素子を腐食させることがあった。そこでハロ
ゲン化炭化水素による腐食防止を目的としてニトロフェ
ノールあるいはニトロ安息香酸を添加したものが用いら
れていたが、無負荷で放置した場合に漏れ電流が増加す
る欠点があり、特に低漏れ電流用電解コンデンサには不
向きであった。Problems to be Solved by the Invention Aluminum electrolytic capacitors require a cleaning process,
During the removal process of solder flax used when attaching to printed circuit boards, halogenated hydrocarbons can penetrate through the rubber plug and enter the capacitor by immersion in halogenated hydrocarbons used as a cleaning agent or in a steam bath. death,
It decomposes to produce chlorine ions, which can corrode capacitor elements. For the purpose of preventing corrosion caused by halogenated hydrocarbons, nitrophenol or nitrobenzoic acid was used, but this had the disadvantage of increasing leakage current when left unloaded. It was not suitable for capacitors.
そこで、低漏れ電流用アルミニウム電解コンデンサを洗
浄する場合には封口部に樹脂を塗布する対策が行われて
いたが、コスト高となる等の問題を有していた。Therefore, when cleaning aluminum electrolytic capacitors for low leakage current, a measure has been taken to coat the sealing portion with resin, but this method has had problems such as high cost.
問題点を解決するための手段
本発明は、上述の問題点を解決するもので、従来の電解
液から得られる優れた特性を損なうことなく、低漏れ電
流用アルミニウム電解コンデンサにも樹脂を塗布するこ
となく、洗浄工程を取り入れることが可能な電解液を提
供するものである。Means for Solving the Problems The present invention solves the above-mentioned problems by applying a resin to low leakage current aluminum electrolytic capacitors without sacrificing the excellent properties obtained from conventional electrolytes. The present invention provides an electrolytic solution that can be subjected to a cleaning process without having to do so.
すなわち、エチレングリコールを主溶媒とし、これに有
機酸あるいはその塩を溶解してなる電解液にメチル−ニ
トロ安息香酸または／およびニトロアニソールを０．５
重量％以上添加して溶解したことを特徴とする電解コン
デンサの電解液である。That is, 0.50% of methyl-nitrobenzoic acid or/and nitroanisole is added to an electrolytic solution prepared by dissolving an organic acid or its salt in ethylene glycol as a main solvent.
This is an electrolytic solution for an electrolytic capacitor, characterized in that it is added and dissolved in an amount of % by weight or more.
作用
本発明の電解液は、低漏れ電流用アルミニウム電解コン
デンサにおいて、漏れ電流特性を損なうことな（、洗浄
剤として使用されるハロゲン化炭化水素がコンデンサケ
ース内に侵入しても塩素イオンの分解を抑制し、また塩
素イオンによるアルミニウム電極の腐食を防止する。Function The electrolytic solution of the present invention can be used in aluminum electrolytic capacitors for low leakage current without impairing the leakage current characteristics (even if a halogenated hydrocarbon used as a cleaning agent enters the capacitor case, it will not decompose chlorine ions. It also prevents corrosion of aluminum electrodes caused by chlorine ions.
実施例 以下、本発明の実施例について説明する。Example Examples of the present invention will be described below.
第１表は本発明と従来の電解コンデンサに用いた電解液
の組成、比抵抗およびこれを低漏れ電流用アルミニウム
電解コンデンサ、定格５０ＷＶ ６．８μＦに使用した
場合の初期漏れ電流特性および８５’ｃ１０００時間の
無負荷放置後の漏れ電流特性についての比較例を示す。Table 1 shows the composition and specific resistance of the electrolyte used in the present invention and conventional electrolytic capacitors, and the initial leakage current characteristics and 85'c1000 when used in an aluminum electrolytic capacitor for low leakage current, rated at 50WV, 6.8μF. A comparative example of leakage current characteristics after being left unloaded for a period of time is shown.
第２表は、本発明と従来の電解液を用いて作成したアル
ミニウム電解コンデンサ、定格１００ＷＶ４．７μＦを
ＬＬＩ−）リクロロエタン中に浸漬し、周波数２８ ｋ
Ｈｚの超音波洗浄を５分間行った後、８５℃の恒温槽
に入れ、定格電圧を１０００時間連続印加した後製品を
分解調査し、腐食発生個数を調査した結果を示す。Table 2 shows aluminum electrolytic capacitors fabricated using the present invention and conventional electrolytes, rated at 100WV, 4.7μF, immersed in LLI-)lichloroethane, and at a frequency of 28K.
After performing ultrasonic cleaning at Hz for 5 minutes, the product was placed in a constant temperature bath at 85°C, and the rated voltage was continuously applied for 1000 hours.The product was then disassembled and investigated to determine the number of corrosion occurrences.The results are shown below.
第２表
第１表および第２表に示す通り本発明による電解液試料
記号り、Ｅ、Ｆ、Ｇ、Ｈ，ｉ Ｊ、Ｋ、Ｌを用いたアル
ミニウム電解コンデンサは、１，１゜１−トリクロロエ
タン中で超音波洗浄を実施したのち、高温度雰囲気中で
印加を行っても腐食の発生はなく、また良好な漏れ電流
特性を示す。Table 2 As shown in Tables 1 and 2, aluminum electrolytic capacitors using the electrolyte sample symbols E, F, G, H, i, J, K, and L according to the present invention are 1,1°1- After performing ultrasonic cleaning in trichloroethane, no corrosion occurs even when electric current is applied in a high temperature atmosphere, and it also exhibits good leakage current characteristics.
なお、メチル−ニトロ安息香酸または／およびニトロア
ニソールの添加量は０．５重量％以上が好ましく、添加
量が飽和濃度を超えることは好ましくない。また、０．
５重量％未満では腐食防止効果が不十分である。The amount of methyl-nitrobenzoic acid and/or nitroanisole added is preferably 0.5% by weight or more, and it is not preferable that the amount added exceeds the saturation concentration. Also, 0.
If it is less than 5% by weight, the corrosion prevention effect is insufficient.
発明の効果
以上のように、本発明のエチレングリコールを主溶媒と
し、これに有機酸あるいはその塩を溶解してなる電解液
に、メチル−ニトロ安息香酸または／およびニトロアニ
ソールを０．５重量％以上添加して溶解したことを特徴
とする電解液によって、洗浄剤に耐え、信頼性の高く、
コスト面でも有利な低漏れ電流用アルミニウム電解コン
デンサが得られ、工業的ならびに実用的価値の大なるも
のである。Effects of the Invention As described above, 0.5% by weight of methyl-nitrobenzoic acid or/and nitroanisole is added to an electrolytic solution prepared by dissolving an organic acid or its salt in the ethylene glycol of the present invention as a main solvent. The electrolyte solution, which is characterized by the addition and dissolution of the above, is resistant to cleaning agents and highly reliable.
An aluminum electrolytic capacitor with low leakage current which is advantageous in terms of cost can be obtained and has great industrial and practical value.
Claims (3)
あるいはその塩を溶解してなる電解液にメチル−ニトロ
安息香酸または／およびニトロアニソールを０．５重量
％以上添加して溶解したことを特徴とする電解コンデン
サの駆動用電解液。(1) Methyl-nitrobenzoic acid or/and nitroanisole is added in an amount of 0.5% by weight or more and dissolved in an electrolytic solution prepared by dissolving an organic acid or its salt in ethylene glycol as the main solvent. Electrolyte for driving electrolytic capacitors.
ニトロ安息香酸、２−メチル−６−ニトロ安息香酸、３
−メチル−２−ニトロ安息香酸、３−メチル−４−ニト
ロ安息香酸、４−メチル−３−ニトロ安息香酸、５−メ
チル−２−ニトロ安息香酸であることを特徴とする特許
請求の範囲第１項記載の電解コンデンサの駆動用電解液
。(2) The above methyl-nitrobenzoic acid is 2-methyl-3-
Nitrobenzoic acid, 2-methyl-6-nitrobenzoic acid, 3
-Methyl-2-nitrobenzoic acid, 3-methyl-4-nitrobenzoic acid, 4-methyl-3-nitrobenzoic acid, and 5-methyl-2-nitrobenzoic acid. An electrolytic solution for driving an electrolytic capacitor according to item 1.
ｏ−ニトロアニソール、ｍ−ニトロアニソールであるこ
とを特徴とする特許請求の範囲第１項記載の電解コンデ
ンサの駆動用電解液。(3) The above nitroanisole is p-nitroanisole,
The electrolytic solution for driving an electrolytic capacitor according to claim 1, which is o-nitroanisole or m-nitroanisole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31824087A JPH01158715A (en) | 1987-12-15 | 1987-12-15 | Electrolyte for driving electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31824087A JPH01158715A (en) | 1987-12-15 | 1987-12-15 | Electrolyte for driving electrolytic capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01158715A true JPH01158715A (en) | 1989-06-21 |
Family
ID=18096990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31824087A Pending JPH01158715A (en) | 1987-12-15 | 1987-12-15 | Electrolyte for driving electrolytic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01158715A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008235895A (en) * | 2007-03-20 | 2008-10-02 | Avx Corp | Neutral electrolyte for wet electrolytic capacitor |
-
1987
- 1987-12-15 JP JP31824087A patent/JPH01158715A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008235895A (en) * | 2007-03-20 | 2008-10-02 | Avx Corp | Neutral electrolyte for wet electrolytic capacitor |
| US7460356B2 (en) * | 2007-03-20 | 2008-12-02 | Avx Corporation | Neutral electrolyte for a wet electrolytic capacitor |
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