Patent EP0227433A2 successfully refreshed from Google Patents.
EP0227433A2
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EP
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Electrolyte solution of quaternary ammonium salt for electrolytic capacitor
Assignee: Mitsubishi Chemical Corp
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Filing: 1986-12-17
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Granted: —
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Expires: 2006-12-17
Abstract
Abstract An electrolyte solution for use in an electrolytic capacitor comprises as a solute at least one quaternary ammonium salt of a carboxylic acid which selected from 5-40 wt % of (a) maleic acid and/or citraconic acid or (b) 7-30 aromatic carboxylic acid or (c) 1-40 wt % of a branched-chain aliphatic dicarboxylic acid, in (c) the salt has 11-30 C atoms.The electrolyte solution has high electrical conductivity when used e.g. with Al foil electrodes.The solvent is aprotic, preferably an amide or lactone.
Inventors
- 👤 Shoichiro Mitsubishi Petrochemical Co. Ltd. Mori
- 👤 Makoto Mitsubishi Petrochemical Co. Ltd. Ue
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 23:00
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/022
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
69 words
An electrolyte solution for use in an electrolytic capacitor, said solution comprising as a solute at least one quaternary ammonium salt of a carboxylic acid characterised in that the acid in said salt is selected from (a) at least one of maleic acid and citraconic acid, (b) aromatic carboxylic acids, and (c) branched-chain aliphatic dicarboxylic acids, in which case the salt has 11 to 30 carbon atoms in total.
Claim 2
Dependent Claim
69 words
An electrolyte solution for use in an electrolytic capacitor, said solution comprising as a solute at least one quaternary ammonium salt of a carboxylic acid characterised in that the acid in said salt is selected from (a) at least one of maleic acid and citraconic acid, (b) aromatic carboxylic acids, and (c) branched-chain aliphatic dicarboxylic acids, in which case the salt has 11 to 30 carbon atoms in total.
Claim 3
Dependent Claim
21 words
An electrolyte solution as claimed in Claim 1, which includes a solvent composed mainly of aprotic solvent to dissolve the solute.
Claim 4
Dependent Claim
21 words
An electrolyte solution as claimed in Claim 2, wherein a solvent composed mainly of gammabutyrolactone is used to dissolve the solute.
Claim 5
Dependent Claim
24 words
An electrolyte solution as claimed in Claim 1, 2 or 3, wherein at least one of (a) and (b) is used as the solute.
Claim 6
Dependent Claim
22 words
An electrolyte solution as claimed in Claim 1, 2 or 3, wherein at least one of (c) is used as the solute.
Claim 7
Dependent Claim
24 words
An electrolyte solution as claimed in Claim 4, wherein the concentration of the solute is in the range of 5 to 40% by weight.
Claim 8
Dependent Claim
24 words
An electrolyte solution as claimed in Claim 5, wherein the concentration of the solute is in the range of 1 to 40% by weight.
Claim 9
Dependent Claim
19 words
Use of an electrolyte solution as claimed in any of Claims 1 to 7, under medium to high voltages.
References Cited (Backward Citations)
No citation records indexed.
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