Patent ID: 6839222

Claim:
An electrolytic capacitor comprising: a positive foil provided at the surface with a dielectric coating; a negative foil opposing to the positive foil; a separator containing at least either one of rayon fiber and cotton linter, disposed between the positive foil and the negative foil; and a polymeric electrolyte composite conducting an ion between the positive foil and the negative foil, the polymeric electrolyte composite including; an electrolyte formed of a polar solvent and at least one among inorganic acids, organic acids and salts of the inorganic, organic acids containing neither metal ion nor quaternary ammonium ion as a cation, an acrylic ester copolymer containing the electrolyte, the copolymer made of; a first monomer of acrylic derivative formed of at least one among the group of monofunctional monomers having hydroxyl group at the end and one polymeric unsaturated double bond, and a second monomer of acrylic derivative formed of at least one among the group of multifunctional monomers having a plurality of polymeric unsaturated double bond.