Title:
ELECTROLYTIC SOLUTION FOR ELECTROLYTIC CAPACITOR, AND ELECTROLYTIC CAPACITOR
Document Type and Number:
WIPO Patent Application WO/2019/082904
Kind Code:
A1
Abstract:
The purpose of the present invention is provide an electrolytic solution which is for an electrolytic capacitor and which has superior voltage resistance, and a small decrease in electrical conductivity after a heat resistance test. This electrolytic solution for an electrolytic capacitor contains an electrolyte and a solvent, wherein the electrolyte contains an anion and a cation, the anion has a structure in which, from a copolymer having a carboxy group, at least one hydrogen ion of the carboxy group is removed, the copolymer having a carboxy group has a substituent having 5-20 carbon atoms which is linked to a carbon atom of the backbone of the copolymer, the copolymer having a carboxy group does not have a hydroxy group, and even if the copolymer having a carboxy group has a hydroxy group, the contained amount of monomers containing a hydroxy group of the structural monomers of the copolymer having a carboxy group is less than 60 wt% with respect to the weight of all monomers constituting the copolymer having a carboxy group, the copolymer satisfies condition 1, and the solvent contains ethylene glycol. (Condition 1) The electrical conductivity of an ethylene glycol solution containing 10 wt% of an ammonium salt between ammonia and the copolymer having a carboxy group is 0.2-3.0 mS/cm at 30°C.
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Inventors:
TANABE FUMIYUKI (JP)
SHIBA TAKAHIRO (JP)
UCHIHASHI KENGO (JP)
SHIBA TAKAHIRO (JP)
UCHIHASHI KENGO (JP)
Application Number:
PCT/JP2018/039392
Publication Date:
May 02, 2019
Filing Date:
October 23, 2018
Export Citation:
Assignee:
SANYO CHEMICAL IND LTD (JP)
International Classes:
H01G9/035
Domestic Patent References:
| WO2017138578A1 | 2017-08-17 |
Foreign References:
| JPH01103821A | 1989-04-20 | |||
| JP2003249422A | 2003-09-05 | |||
| JPS6477110A | 1989-03-23 | |||
| JPH0745482A | 1995-02-14 | |||
| JP2007067448A | 2007-03-15 | |||
| JPH05117330A | 1993-05-14 | |||
| US4892944A | 1990-01-09 |
Other References:
J. AM. CHEM. SOC., vol. 69, 1947, pages 2269
See also references of EP 3703088A4
See also references of EP 3703088A4
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
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