Production of zinc-air button cell

Abstract From the Canadian patent

An improved substantially leak-proof button cell particularly adapted for use in hearing aids comprising an outer, cathode can and an inner anode can containing a zinc electrode material, preferably a zinc paste, the inner can being positioned within the outer can, with the outer wall of the inner can spaced from the inner wall of the outer can, a polymeric seal preferably, a polypropylene seal, positioned between the outer wall of the inner can and the inner wall of the outer can the outer wall of, the inner can having a coating of an alkali resistant elastomer or elastomeric adhesive, e.g. a self-curing butyl elastomer modified by a phenolic resin, which is pressure sensitive and having …