JP4555154B2 - Electrolytic solution for electrolytic capacitor and electrolytic capacitor - Google Patents
Electrolytic solution for electrolytic capacitor and electrolytic capacitor Download PDFInfo
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- JP4555154B2 JP4555154B2 JP2005152829A JP2005152829A JP4555154B2 JP 4555154 B2 JP4555154 B2 JP 4555154B2 JP 2005152829 A JP2005152829 A JP 2005152829A JP 2005152829 A JP2005152829 A JP 2005152829A JP 4555154 B2 JP4555154 B2 JP 4555154B2
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- benzothiazolone
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- 239000003990 capacitor Substances 0.000 title claims description 19
- 239000008151 electrolyte solution Substances 0.000 title claims description 15
- YEDUAINPPJYDJZ-UHFFFAOYSA-N 2-hydroxybenzothiazole Chemical compound C1=CC=C2SC(O)=NC2=C1 YEDUAINPPJYDJZ-UHFFFAOYSA-N 0.000 claims description 9
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 7
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims description 6
- 150000003839 salts Chemical class 0.000 claims description 6
- 239000002904 solvent Substances 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 13
- 229910052782 aluminium Inorganic materials 0.000 description 13
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 12
- 229910000679 solder Inorganic materials 0.000 description 10
- -1 tertiary amine salt Chemical class 0.000 description 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 5
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 3
- ROSDSFDQCJNGOL-UHFFFAOYSA-N Dimethylamine Chemical compound CNC ROSDSFDQCJNGOL-UHFFFAOYSA-N 0.000 description 3
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 3
- MTNDZQHUAFNZQY-UHFFFAOYSA-N imidazoline Chemical class C1CN=CN1 MTNDZQHUAFNZQY-UHFFFAOYSA-N 0.000 description 3
- DLFVBJFMPXGRIB-UHFFFAOYSA-N Acetamide Chemical compound CC(N)=O DLFVBJFMPXGRIB-UHFFFAOYSA-N 0.000 description 2
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 2
- QUSNBJAOOMFDIB-UHFFFAOYSA-N Ethylamine Chemical compound CCN QUSNBJAOOMFDIB-UHFFFAOYSA-N 0.000 description 2
- BAVYZALUXZFZLV-UHFFFAOYSA-N Methylamine Chemical compound NC BAVYZALUXZFZLV-UHFFFAOYSA-N 0.000 description 2
- PMDCZENCAXMSOU-UHFFFAOYSA-N N-ethylacetamide Chemical compound CCNC(C)=O PMDCZENCAXMSOU-UHFFFAOYSA-N 0.000 description 2
- ATHHXGZTWNVVOU-UHFFFAOYSA-N N-methylformamide Chemical compound CNC=O ATHHXGZTWNVVOU-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
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- BDJRBEYXGGNYIS-UHFFFAOYSA-N nonanedioic acid Chemical compound OC(=O)CCCCCCCC(O)=O BDJRBEYXGGNYIS-UHFFFAOYSA-N 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- CXMXRPHRNRROMY-UHFFFAOYSA-N sebacic acid Chemical compound OC(=O)CCCCCCCCC(O)=O CXMXRPHRNRROMY-UHFFFAOYSA-N 0.000 description 2
- HXJUTPCZVOIRIF-UHFFFAOYSA-N sulfolane Chemical compound O=S1(=O)CCCC1 HXJUTPCZVOIRIF-UHFFFAOYSA-N 0.000 description 2
- GETQZCLCWQTVFV-UHFFFAOYSA-N trimethylamine Chemical compound CN(C)C GETQZCLCWQTVFV-UHFFFAOYSA-N 0.000 description 2
- JLIOOYQWWAUHRC-UHFFFAOYSA-N 2-carboxybenzoate;triethylazanium Chemical compound CCN(CC)CC.OC(=O)C1=CC=CC=C1C(O)=O JLIOOYQWWAUHRC-UHFFFAOYSA-N 0.000 description 1
- 239000005711 Benzoic acid Substances 0.000 description 1
- MAHJMATXDSXRLN-UHFFFAOYSA-N C(C=1C(C(=O)[O-])=CC=CC1)(=O)[O-].C(C)C1(C(N=C[NH2+]1)(CC)CC)CC.C(C)C1(C(N=C[NH2+]1)(CC)CC)CC Chemical compound C(C=1C(C(=O)[O-])=CC=CC1)(=O)[O-].C(C)C1(C(N=C[NH2+]1)(CC)CC)CC.C(C)C1(C(N=C[NH2+]1)(CC)CC)CC MAHJMATXDSXRLN-UHFFFAOYSA-N 0.000 description 1
- NTOXAXQNZZXUQQ-UHFFFAOYSA-N C1(OC(=C(C)C)O1)=O Chemical compound C1(OC(=C(C)C)O1)=O NTOXAXQNZZXUQQ-UHFFFAOYSA-N 0.000 description 1
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 1
- SUAKHGWARZSWIH-UHFFFAOYSA-N N,N‐diethylformamide Chemical compound CCN(CC)C=O SUAKHGWARZSWIH-UHFFFAOYSA-N 0.000 description 1
- OHLUUHNLEMFGTQ-UHFFFAOYSA-N N-methylacetamide Chemical compound CNC(C)=O OHLUUHNLEMFGTQ-UHFFFAOYSA-N 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- 239000001361 adipic acid Substances 0.000 description 1
- 235000011037 adipic acid Nutrition 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 235000010233 benzoic acid Nutrition 0.000 description 1
- 229920001400 block copolymer Polymers 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical class OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 238000004581 coalescence Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000006184 cosolvent Substances 0.000 description 1
- HPNMFZURTQLUMO-UHFFFAOYSA-N diethylamine Chemical compound CCNCC HPNMFZURTQLUMO-UHFFFAOYSA-N 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- LIWAQLJGPBVORC-UHFFFAOYSA-N ethylmethylamine Chemical compound CCNC LIWAQLJGPBVORC-UHFFFAOYSA-N 0.000 description 1
- 150000002334 glycols Chemical class 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 239000007788 liquid Substances 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
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- AJFDBNQQDYLMJN-UHFFFAOYSA-N n,n-diethylacetamide Chemical compound CCN(CC)C(C)=O AJFDBNQQDYLMJN-UHFFFAOYSA-N 0.000 description 1
- DAZXVJBJRMWXJP-UHFFFAOYSA-N n,n-dimethylethylamine Chemical compound CCN(C)C DAZXVJBJRMWXJP-UHFFFAOYSA-N 0.000 description 1
- GNVRJGIVDSQCOP-UHFFFAOYSA-N n-ethyl-n-methylethanamine Chemical compound CCN(C)CC GNVRJGIVDSQCOP-UHFFFAOYSA-N 0.000 description 1
- KERBAAIBDHEFDD-UHFFFAOYSA-N n-ethylformamide Chemical compound CCNC=O KERBAAIBDHEFDD-UHFFFAOYSA-N 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 150000002828 nitro derivatives Chemical class 0.000 description 1
- 150000003016 phosphoric acids Chemical class 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920002503 polyoxyethylene-polyoxypropylene Polymers 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- 229920005604 random copolymer Polymers 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- YBRBMKDOPFTVDT-UHFFFAOYSA-N tert-butylamine Chemical compound CC(C)(C)N YBRBMKDOPFTVDT-UHFFFAOYSA-N 0.000 description 1
- CBXCPBUEXACCNR-UHFFFAOYSA-N tetraethylammonium Chemical compound CC[N+](CC)(CC)CC CBXCPBUEXACCNR-UHFFFAOYSA-N 0.000 description 1
- QEMXHQIAXOOASZ-UHFFFAOYSA-N tetramethylammonium Chemical compound C[N+](C)(C)C QEMXHQIAXOOASZ-UHFFFAOYSA-N 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
- SEACXNRNJAXIBM-UHFFFAOYSA-N triethyl(methyl)azanium Chemical compound CC[N+](C)(CC)CC SEACXNRNJAXIBM-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Electric Double-Layer Capacitors Or The Like (AREA)
Description
本発明は、電解コンデンサの駆動用電解液(以下、単に電解液と称す)、および電解コンデンサの改良に関するものであり、特にはんだフロー／リフローでのアルミニウム電解コンデンサの耐熱性を改善する電解液に関するものである。 The present invention relates to an electrolytic solution for driving an electrolytic capacitor (hereinafter simply referred to as an electrolytic solution) and an electrolytic capacitor, and more particularly to an electrolytic solution for improving the heat resistance of an aluminum electrolytic capacitor in solder flow / reflow. Is.
従来、低圧用アルミニウム電解コンデンサでは、γ−ブチロラクトンを主溶媒とし、フタル酸トリエチルアミンなどのフタル酸の三級アミン塩やフタル酸テトラエチルイミダゾリニウムなどのイミダゾリニウム塩を主溶質として配合された電解液が使用されている（例えば、特許文献１参照）。
近年、地球環境保全対策の一環として、はんだの鉛フリー化が進められている。鉛フリーはんだは従来の鉛入りはんだに比べ融点が高いため、鉛フリーはんだを用いる場合には、フロー／リフローの温度を鉛入りはんだを用いた場合より高く設定する必要がある。このため、鉛フリーはんだを用いたフロー／リフロー工程にし、アルミニウム電解コンデンサを基板実装したとき、その熱により電解液の蒸気圧が上昇し、アルミニウム電解コンデンサの内圧が上昇する。その結果、封口部や圧力弁に大きな圧力が加わって封口部や圧力弁が外側に膨らむことがあり、このような膨らみは、製品の高さ寸法を増大させるという問題点がある。 In recent years, lead-free solder has been promoted as part of global environmental conservation measures. Since lead-free solder has a higher melting point than conventional lead-containing solder, when lead-free solder is used, the flow / reflow temperature must be set higher than when lead-containing solder is used. Therefore, when a flow / reflow process using lead-free solder is performed and the aluminum electrolytic capacitor is mounted on the substrate, the vapor pressure of the electrolytic solution increases due to the heat, and the internal pressure of the aluminum electrolytic capacitor increases. As a result, a large pressure is applied to the sealing portion and the pressure valve, and the sealing portion and the pressure valve may swell outward, and such a bulge increases the height of the product.
以上の問題点に鑑みて、本発明の課題は、鉛フリーはんだの使用などに起因してフロー／リフローの温度を高く設定した場合においても高さ寸法が変化することを回避可能なアルミニウム電解コンデンサの駆動用電解液およびアルミニウム電解コンデンサを提供することにある。 In view of the above problems, an object of the present invention is to provide an aluminum electrolytic capacitor capable of avoiding a change in height even when the flow / reflow temperature is set high due to the use of lead-free solder. An electrolytic solution for driving and an aluminum electrolytic capacitor are provided.
上記課題を解決するために、本発明に係るアルミニウム電解コンデンサでは、γ−ブチロラクトンを主溶媒とし、少なくとも、有機カルボン酸またはその塩と、以下の化学式で示される２（３Ｈ）−ベンゾチアゾロンとが配合され、２（３Ｈ）−ベンゾチアゾロンの配合量が、電解液全体に対して５〜１０ｗｔ％である電解液が用いられていることを特徴とする。 In order to solve the above problems, in the aluminum electrolytic capacitor according to the present invention, γ-butyrolactone is used as a main solvent, and at least an organic carboxylic acid or a salt thereof and 2 (3H) -benzothiazolone represented by the following chemical formula are blended. In addition , an electrolytic solution in which the blending amount of 2 (3H) -benzothiazolone is 5 to 10 wt% with respect to the entire electrolytic solution is used.
配合量が５．０ｗｔ％未満では、耐熱試験やフロー／リフローに起因する高さ寸法の変化を抑制する効果が小さい。これに対して、配合量が１０．０ｗｔ％を超える場合は、高温負荷試験後におけるｔａｎδの絶対値が大きいという傾向がある。 When the blending amount is less than 5.0 wt%, the effect of suppressing the change in height due to the heat resistance test or flow / reflow is small. On the other hand, when the blending amount exceeds 10.0 wt%, the absolute value of tan δ after the high temperature load test tends to be large.
本発明において、前記有機カルボン酸としては、アジピン酸、セバシン酸、アゼライン酸、安息香酸、フタル酸、マレイン酸等を例示することができる。 In the present invention, examples of the organic carboxylic acid include adipic acid, sebacic acid, azelaic acid, benzoic acid, phthalic acid, maleic acid and the like.
また、前記有機カルボン酸の塩としては、アンモニウム塩の他、メチルアミン、エチルアミン、ｔ−ブチルアミン等の一級アミン塩、ジメチルアミン、エチルメチルアミン、ジエチルアミン等の二級アミン塩、トリメチルアミン、ジエチルメチルアミン、エチルジメチルアミン、トリエチルアミン等の三級アミン塩、テトラメチルアンモニウム、トリエチルメチルアンモニウム、テトラエチルアンモニウム等の四級アンモニウム塩等を例示することができる。 Examples of the salt of the organic carboxylic acid include ammonium salts, primary amine salts such as methylamine, ethylamine, and t-butylamine, secondary amine salts such as dimethylamine, ethylmethylamine, and diethylamine, trimethylamine, and diethylmethylamine. And tertiary amine salts such as ethyldimethylamine and triethylamine, and quaternary ammonium salts such as tetramethylammonium, triethylmethylammonium and tetraethylammonium.
本発明において、初期の抵抗値あるいは高温信頼性という観点からすれば、前記有機カルボン酸またはその塩としては、フタル酸の三級アミン塩およびフタル酸のイミダゾリニウム塩のうちの少なくとも一方を用いることが好ましい。 In the present invention, from the viewpoint of initial resistance value or high temperature reliability, the organic carboxylic acid or a salt thereof is at least one of a tertiary amine salt of phthalic acid and an imidazolinium salt of phthalic acid. It is preferable.
γ−ブチロラクトンを主溶媒とし、２（３Ｈ）−ベンゾチアゾロンを配合した本発明による電解液は、従来の電解液に比べ蒸気圧が低い。このため、鉛フリーはんだを使用するためにフロー／リフローの温度設定を高めた場合でも、アルミニウム電解コンデンサの内部圧力の上昇を抑制でき、アルミニウム電解コンデンサの高さ寸法の増大を抑えることができる。 The electrolytic solution according to the present invention containing γ-butyrolactone as a main solvent and 2 (3H) -benzothiazolone has a lower vapor pressure than the conventional electrolytic solution. For this reason, even when the flow / reflow temperature setting is increased because lead-free solder is used, an increase in the internal pressure of the aluminum electrolytic capacitor can be suppressed, and an increase in the height of the aluminum electrolytic capacitor can be suppressed.
本発明を実施例に基づき、より具体的に説明する。まず、表１に示す組成で電解液を調合した後、φ８×１１．５ｍｍＬ、定格５０Ｖ／１００μＦのアルミニウム電解コンデンサを各２０個作製した。次に、鉛フリーはんだを使用したフロー／リフローでの耐熱性を評価するために、実施例と従来例の製品各１０個を２８０℃の恒温槽中に２分間放置（耐熱試験）した後、室温で放冷し、耐熱試験前後における製品高さの変化率を調査した。その結果を表１に示す。
また、残りの各１０個については、ｔａｎδの初期値を計測した後、１０５℃の恒温槽中で定格電圧を２０００時間印加し、しかる後にｔａｎδを測定した。その結果を表１に示す。
The present invention will be described more specifically based on examples. First, after preparing an electrolytic solution with the composition shown in Table 1, 20 aluminum electrolytic capacitors each having a diameter of 8 × 11.5 mmL and a rating of 50V / 100 μF were prepared. Next, in order to evaluate the heat resistance in the flow / reflow using lead-free solder, each of the 10 products of the example and the conventional example was left in a constant temperature bath at 280 ° C. for 2 minutes (heat resistance test). The product was allowed to cool at room temperature, and the rate of change in product height before and after the heat resistance test was investigated. The results are shown in Table 1.
Further, for each of the remaining 10 pieces, after measuring the initial value of tan δ, a rated voltage was applied for 2000 hours in a thermostat at 105 ° C., and then tan δ was measured. The results are shown in Table 1.
表１に示すように、２（３Ｈ）−ベンゾチアゾロンを添加しない従来例１、２に係るアルミニウム電解コンデンサは、耐熱試験により、高さ寸法が８〜１０％増大した。これに対して、２（３Ｈ）−ベンゾチアゾロンを配合した実施例１〜６に係るアルミニウム電解コンデンサは、耐熱試験後の製品高さの変化率が、従来例より著しく小さい。 As shown in Table 1, the aluminum electrolytic capacitors according to Conventional Examples 1 and 2 to which 2 (3H) -benzothiazolone was not added increased in height by 8 to 10% by the heat resistance test. On the other hand, the aluminum electrolytic capacitors according to Examples 1 to 6 blended with 2 (3H) -benzothiazolone have a remarkably smaller change rate of the product height after the heat resistance test than the conventional example.
ここで、２（３Ｈ）−ベンゾチアゾロンの配合量は、電解液全体に対して５．０〜１０．０ｗｔ％の範囲が好ましい。配合量が５．０ｗｔ％未満では、耐熱試験での高さ寸法変化を抑制する効果が少ない。これに対して、配合量が１０．０ｗｔ％を超える場合は、高温負荷試験での２０００時間後におけるｔａｎδの絶対値が大きい傾向にあり、低インピーダンス特性が求められるアルミニウム電解コンデンサの用途には不向きとなる。 Here, the blending amount of 2 (3H) -benzothiazolone is preferably in the range of 5.0 to 10.0 wt% with respect to the entire electrolytic solution. When the blending amount is less than 5.0 wt%, the effect of suppressing the change in the height dimension in the heat resistance test is small. On the other hand, when the blending amount exceeds 10.0 wt%, the absolute value of tan δ after 2000 hours in the high temperature load test tends to be large, which is not suitable for the use of an aluminum electrolytic capacitor requiring low impedance characteristics. It becomes.
なお、上記実施例では、有機カルボン酸またはその塩としては、フタル酸の三級アミン塩、フタル酸のイミダゾリニウム塩を用いたが、先に例示した他の有機カルボン酸またその塩を用いた場合でも、２（３Ｈ）−ベンゾチアゾロンを添加すれば耐熱性を向上することができる。
また、副溶媒として、エチレングリコール、プロピレングリコール等のグリコール類、Ｎ−メチルホルムアミド、Ｎ，Ｎ−ジメチルホルムアミド、Ｎ−エチルホルムアミド、Ｎ，Ｎ−ジエチルホルムアミド、Ｎ−メチルアセトアミド、Ｎ，Ｎ−ジメチルアセトアミド、Ｎ−エチルアセトアミド、Ｎ，Ｎ−ジエチルアセトアミド、ヘキサメチルホスホリックアミド等のアミド類、エチレンカーボネート、プロピレンカーボネート、イソブチレンカーボネート等の炭酸類、アセトニトリル等のニトリル類、ジメチルスルホキシド等のオキシド類、エーテル類、ケトン類、エステル類、スルホラン、スルホラン誘導体、水等の公知の溶媒を混合することができる。
さらに、特性改善のため、その他の溶質として、リン酸化合物、ホウ酸化合物、多価アルコール類、ポリビニルアルコール、ポリエチレングリコール、ポリプロピレングリコール、ポリオキシエチレンポリオキシプロピレングリコールのランダム共重合体およびブロック共重合体に代表される高分子化合物、ニトロ化合物等の公知の溶質を溶解することができる。
In the above examples, as the organic carboxylic acid or a salt thereof, a tertiary amine salt of phthalic acid or an imidazolinium salt of phthalic acid was used. However, other organic carboxylic acids or salts thereof exemplified above were used. Even in such a case, the heat resistance can be improved by adding 2 (3H) -benzothiazolone.
In addition, as cosolvents, glycols such as ethylene glycol and propylene glycol, N-methylformamide, N, N-dimethylformamide, N-ethylformamide, N, N-diethylformamide, N-methylacetamide, N, N-dimethyl Amides such as acetamide, N-ethylacetamide, N, N-diethylacetamide, hexamethylphosphoric amide, carbonates such as ethylene carbonate, propylene carbonate, isobutylene carbonate, nitriles such as acetonitrile, oxides such as dimethyl sulfoxide, Known solvents such as ethers, ketones, esters, sulfolane, sulfolane derivatives and water can be mixed.
Furthermore, as other solutes for improving properties, phosphoric acid compounds, boric acid compounds, polyhydric alcohols, polyvinyl alcohol, polyethylene glycol, polypropylene glycol, polyoxyethylene polyoxypropylene glycol random copolymers and block copolymers Known solutes such as polymer compounds represented by coalescence, nitro compounds and the like can be dissolved.
Claims (2)
前記２（３Ｈ）−ベンゾチアゾロンの配合量が、電解液全体に対して５〜１０ｗｔ％であることを特徴とする電解コンデンサの駆動用電解液。
2. The electrolytic solution for driving an electrolytic capacitor, wherein the blending amount of 2 (3H) -benzothiazolone is 5 to 10 wt% with respect to the entire electrolytic solution.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62114206A (en) * | 1985-11-14 | 1987-05-26 | 旭硝子株式会社 | Electrolyte for electrolytic capacitor |
| JPS63293911A (en) * | 1987-05-27 | 1988-11-30 | Nichicon Corp | Electrolyte for driving aluminum electrolytic capacitor |
| JP2003142088A (en) * | 2001-11-07 | 2003-05-16 | Daiwa Kasei Kenkyusho:Kk | Electrode material for secondary battery by plating method and its manufacturing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62114206A (en) * | 1985-11-14 | 1987-05-26 | 旭硝子株式会社 | Electrolyte for electrolytic capacitor |
| JPS63293911A (en) * | 1987-05-27 | 1988-11-30 | Nichicon Corp | Electrolyte for driving aluminum electrolytic capacitor |
| JP2003142088A (en) * | 2001-11-07 | 2003-05-16 | Daiwa Kasei Kenkyusho:Kk | Electrode material for secondary battery by plating method and its manufacturing method |
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