ALUMINUM ELECTROLYTIC CAPACITOR

摘要

PURPOSE: To provide a highly reliable aluminum electrolytic capacitor which can prevent electrolytic solution from leaking to an outside by reducing influence of electrolysis reaction of electrolytic solution during reverse voltage application and improving stability of a sealing part at a high temperature. CONSTITUTION: This device is provided with a capacitor element which is formed by winding an anode foil and a cathode foil together with a separator and infiltrating driving electrolytic solution therein, a bottomed tubular metallic case for containing the capacitor element and a sealing body for sealing an opening part of the metallic case. As for driving electrolytic solution, electrolytic solution which is formed by dissolving quaternary salt of compound with alkyl displacement amidine group of phthalic acid and/or maleic acid to organic solvent containingγ-butylolactone is used, and as for a sealing body, an elastic body which is formed by adding alkyl phenol formalin resin as a curing agent to butyl rubber polymer comprising copolymer of isobutylene and isoprene is used.