Electrolytic solution for electrolytic capacitor
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United States of America Patent
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Aug 16, 1994
Grant Date -
N/A
app pub date -
Nov 17, 1992
filing date -
Nov 19, 1991
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Expired
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Abstract
An electrolytic solution for an electrolytic capacitor is disclosed, comprising a basic solution comprising a mixed solvent of .gamma.-butyrolactone and ethylene glycol having dissolved therein a quaternary alkylammonium salt of phthalic acid, maleic acid or benzoic acid as a solute, the basic solution further containing from 0.5 to 10 parts by weight of colloidal silica and from 0.5 to 8 parts by weight of at least one phosphorus compound selected from dialkyl phosphate and phosphorous acid, per 100 parts by weight of the basic solution. The electrolytic solution has an increased dielectric strength while retaining high conductivity.
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