JPH0282611A - Electrolyte for driving electrolytic capacitor - Google Patents
Electrolyte for driving electrolytic capacitorInfo
- Publication number
- JPH0282611A JPH0282611A JP23526088A JP23526088A JPH0282611A JP H0282611 A JPH0282611 A JP H0282611A JP 23526088 A JP23526088 A JP 23526088A JP 23526088 A JP23526088 A JP 23526088A JP H0282611 A JPH0282611 A JP H0282611A
- Authority
- JP
- Japan
- Prior art keywords
- nitroborazole
- electrolyte
- added
- 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 24
- 239000003792 electrolyte Substances 0.000 title abstract description 8
- 150000007524 organic acids Chemical class 0.000 claims abstract description 6
- 150000003839 salts Chemical class 0.000 claims abstract description 6
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000004327 boric acid Substances 0.000 claims abstract description 5
- 239000003960 organic solvent Substances 0.000 claims abstract description 4
- 239000008151 electrolyte solution Substances 0.000 claims description 14
- 239000000126 substance Substances 0.000 claims 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 12
- 229910052782 aluminium Inorganic materials 0.000 abstract description 12
- 239000000460 chlorine Substances 0.000 abstract description 5
- 229910052801 chlorine Inorganic materials 0.000 abstract description 5
- -1 chlorine ions Chemical class 0.000 abstract description 5
- 238000000354 decomposition reaction Methods 0.000 abstract description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract description 2
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 abstract description 2
- ALWUBSWKHCZVMJ-UHFFFAOYSA-N [N+](=O)([O-])C1=NBC=C1 Chemical compound [N+](=O)([O-])C1=NBC=C1 ALWUBSWKHCZVMJ-UHFFFAOYSA-N 0.000 abstract 3
- 239000004215 Carbon black (E152) Substances 0.000 abstract 1
- 229930195733 hydrocarbon Natural products 0.000 abstract 1
- 150000002430 hydrocarbons Chemical class 0.000 abstract 1
- 238000005040 ion trap Methods 0.000 abstract 1
- 238000005260 corrosion Methods 0.000 description 9
- 230000007797 corrosion Effects 0.000 description 9
- 150000008282 halocarbons Chemical class 0.000 description 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- SLAMLWHELXOEJZ-UHFFFAOYSA-N 2-nitrobenzoic acid Chemical compound OC(=O)C1=CC=CC=C1[N+]([O-])=O SLAMLWHELXOEJZ-UHFFFAOYSA-N 0.000 description 3
- IQUPABOKLQSFBK-UHFFFAOYSA-N 2-nitrophenol Chemical compound OC1=CC=CC=C1[N+]([O-])=O IQUPABOKLQSFBK-UHFFFAOYSA-N 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 239000012459 cleaning agent Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 2
- 150000002828 nitro derivatives Chemical class 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- CXMXRPHRNRROMY-UHFFFAOYSA-N sebacic acid Chemical compound OC(=O)CCCCCCCCC(O)=O CXMXRPHRNRROMY-UHFFFAOYSA-N 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- SCYULBFZEHDVBN-UHFFFAOYSA-N 1,1-Dichloroethane Chemical compound CC(Cl)Cl SCYULBFZEHDVBN-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 235000011037 adipic acid Nutrition 0.000 description 1
- 239000001361 adipic acid Substances 0.000 description 1
- BGECDVWSWDRFSP-UHFFFAOYSA-N borazine Chemical compound B1NBNBN1 BGECDVWSWDRFSP-UHFFFAOYSA-N 0.000 description 1
- 150000001721 carbon Chemical class 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000004506 ultrasonic cleaning Methods 0.000 description 1
Landscapes
- Detergent Compositions (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
Abstract
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浸
入して生ずるコンデンサ素子の腐食を防止する電解コン
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 relates to an electrolytic capacitor that prevents corrosion of a capacitor element caused by penetration of halogenated hydrocarbon into the capacitor when the electrolytic capacitor is cleaned with halogenated hydrocarbon. This invention relates to a driving electrolytic solution (hereinafter referred to as an electrolytic solution).
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、セバシン酸などの有機酸あるいは硼酸およびそれぞ
れ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て用いられていた。Conventional technology Conventionally, an electrolytic solution has been used for aluminum electrolytic capacitors for low leakage current, which is made by using ethylene glycol as the main solvent and dissolving organic acids such as adipic acid and sebacic acid or boric acid and their respective salts. . In addition, nitrophenol or nitrobenzoic acid has been added to the electrolytic solution for aluminum electrolytic capacitors in order to prevent corrosion caused by halogenated hydrocarbons.
発明が解決しようとする問題点
電解コンデンサに対しては、洗浄工程や、印刷基板へ取
着する時に用いるハンダフランクスの除去工程で、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、このハロゲン化炭素水素がゴム
栓を透過してコンデンサ内に浸入し、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、それ
らの添加は耐電圧の低下をもたらすため、中高圧用アル
ミニウム電解コンデンサの電解液に対しては、ニトロフ
ェノールあるいはニトロ安息香酸を添加することはでき
なかった。さらに各種ニトロ化合物あるいは電解液組成
を検討しているが十分に耐腐食性を有する電解液を確立
するにはいたっていない。それはニトロ化合物にはハロ
ゲン化炭化水素の分解を抑制し塩素イオンの生成を抑え
る効果は有するものの塩素イオンによる腐食を抑制する
能力を有しないためである。中高圧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、コスト高となるなどの問題を有
していた。Problems to be Solved by the Invention Electrolytic capacitors must be immersed in halogenated hydrocarbons or steam bathed as a cleaning agent during the cleaning process and the process for removing solder flanks used when attaching to printed circuit boards. As a result, this halogenated carbon hydrogen permeates through the rubber plug and enters the capacitor, decomposes, and generates chlorine ions, which sometimes corrode the capacitor element. To prevent corrosion caused by halogenated hydrocarbons, nitrophenol or nitrobenzoic acid has been added to the electrolyte solution of medium- and high-voltage aluminum electrolytic capacitors. In contrast, it was not possible to add nitrophenol or nitrobenzoic acid. Furthermore, various nitro compounds or electrolyte compositions are being investigated, but an electrolyte solution with sufficient corrosion resistance has not been established. This is because although nitro compounds have the effect of suppressing the decomposition of halogenated hydrocarbons and suppressing the production of chlorine ions, they do not have the ability to suppress corrosion caused by chlorine ions. When cleaning medium-high voltage aluminum electrolytic capacitors, a measure has been taken to coat the sealing part 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、中高圧用
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。すなわち、有機溶媒に有機酸、硼酸およ
びそれぞれの塩を溶解してなる電解液に下記（ａ）また
は（ｂｌの構造を有するニトロボラゾールを添加したこ
とを特徴とする電解コンデンサの電解液である。Means for Solving the Problems The present invention solves the above-mentioned problems by applying a resin to medium-high voltage aluminum electrolytic capacitors without impairing the excellent properties obtained from conventional electrolytes. The purpose is to provide an electrolytic solution that can incorporate a cleaning process. That is, the electrolytic solution for an electrolytic capacitor is characterized in that a nitroberazole having the following structure (a) or (bl) is added to an electrolytic solution prepared by dissolving an organic acid, boric acid, and their respective salts in an organic solvent. .
（ａ）
（ｂｌ
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く、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
ース内に浸入してもニトロボラゾールに付加されている
ニトロ基の効果により塩素イオンの分解を抑制し、ニト
ロボラゾールの下式反応による塩素イオンのトラップに
よりアルミニウム電極の腐食を防止する。(a) (bl) Effect The electrolytic solution of the present invention can be used in aluminum electrolytic capacitors for low leakage current without impairing the leakage current characteristics, and even if halogenated hydrocarbons used as cleaning agents infiltrate into the capacitor case, The effect of the nitro group added to borazole suppresses the decomposition of chlorine ions, and the trapping of chloride ions by the following reaction of nitroberazole prevents corrosion of the aluminum electrode.
第１表 実施例 以下、本発明の実施例について説明する。Table 1 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
液の組成および火花電圧を示す。Table 1 shows the compositions and spark voltages of electrolytes used in the present invention and conventional electrolytic capacitors.
さらに第１表に示した電解液組成を定格４５０Ｗ■１０
０μＦのアルミニウム電解コンデンサに使用し、それぞ
れのコンデンサ試料を１．１．１−１−リクロロエタン
中で超音波洗浄１０分間洗浄後、１２５℃中で定格電圧
連続印加の高温負荷試験を１０００時間実施した後分解
し、腐食発生個数を調べた結果を第２表に示す。第２表
中の分母の数値は試験数、分子の数値は腐食発生個数を
示す。Furthermore, the electrolyte composition shown in Table 1 is rated at 450W■10
Used for 0 μF aluminum electrolytic capacitors, and after each capacitor sample was ultrasonically cleaned in 1-1-lichloroethane for 10 minutes, a high temperature load test was conducted at 125°C with continuous application of the rated voltage for 1000 hours. After that, it was disassembled and the number of corrosion occurrences was investigated. The results are shown in Table 2. In Table 2, the denominator value indicates the number of tests, and the numerator value indicates the number of corrosion occurrences.
第２表
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、２重量％未満では腐食防止効果が不
十分である。Table 2 or above is preferable, and it is not preferable that the amount added exceeds the saturation concentration. Further, if it is less than 0.2% 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、有機酸あるいはその塩を溶解してなる電解液にニト
ロボラゾールを０．２重量％以上添加したことを特徴と
する電解液によって、洗浄剤に耐え、信頼性の高く、コ
スト面でも有利な中高圧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, the electrolytic solution of the present invention is characterized in that 0.2% by weight or more of nitroberazole is added to the electrolytic solution prepared by using ethylene glycol as a main solvent and dissolving an organic acid or its salt. As a result, an aluminum electrolytic capacitor for medium and high voltages that is resistant to cleaning agents, highly reliable, and advantageous in terms of cost can be obtained, and is of great industrial and practical value.
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Ａ、Ｂ、Ｃ）を用いたアルミニウム電解コンデン
サは１．１．１− ）リクロロエタン中で超音波洗浄を
実施したのち、高温度雰囲気中で電圧印加を行っても腐
食の発生はない。As shown in Tables 1 and 2, aluminum electrolytic capacitors using the electrolytes (sample symbols A, B, and C) according to the present invention were subjected to ultrasonic cleaning in dichloroethane. Corrosion does not occur even when voltage is applied in a high temperature atmosphere.
Claims (1)
なる電解液に下記（ａ）または（ｂ）の構造を有するニ
トロボラゾールを０．２重量％以上添加したことを特徴
とする電解コンデンサの駆動用電解液。 ▲数式、化学式、表等があります▼（ａ） ▲数式、化学式、表等があります▼（ｂ）[Scope of Claims] 0.2% by weight or more of nitroberazole having the following structure (a) or (b) is added to an electrolytic solution prepared by dissolving an organic acid, boric acid, and their respective salts in an organic solvent. An electrolytic solution for driving electrolytic capacitors characterized by: ▲There are mathematical formulas, chemical formulas, tables, etc.▼(a) ▲There are mathematical formulas, chemical formulas, tables, etc.▼(b)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23526088A JPH0282611A (en) | 1988-09-20 | 1988-09-20 | Electrolyte for driving electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23526088A JPH0282611A (en) | 1988-09-20 | 1988-09-20 | Electrolyte for driving electrolytic capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0282611A true JPH0282611A (en) | 1990-03-23 |
Family
ID=16983450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23526088A Pending JPH0282611A (en) | 1988-09-20 | 1988-09-20 | Electrolyte for driving electrolytic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0282611A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6349540B1 (en) | 1999-09-30 | 2002-02-26 | Toyota Jidosha Kabushiki Kaisha | Catalyst deterioration determining apparatus for internal combustion engine, and control method for the apparatus |
-
1988
- 1988-09-20 JP JP23526088A patent/JPH0282611A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6349540B1 (en) | 1999-09-30 | 2002-02-26 | Toyota Jidosha Kabushiki Kaisha | Catalyst deterioration determining apparatus for internal combustion engine, and control method for the apparatus |
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