Abstract:
A sealing compound comprising an aqueous dispersion which contains a rubber component of an ethylene propylene nonconjugated diene copolymer rubber as a chief component, a vulcanizing agent, a vulcanization accelerator and a filler. The sealing compound has excellent resistance against the contents that could not be handled with the metal container sealing compositions comprising the aqueous dispersion solution of the NBR and SBR, and exhibits excellent sealing performance and durability even when used for such contents. The sealing compound can be preferably used for the double-seam sealing being applied to the lid so as to be interposed between the lid and the container to seal the content by double-seaming the container with the lid.
Abstract:
PROBLEM TO BE SOLVED: To provide an ethylene-propylene-diene rubber foam capable of reducing corrosiveness and improved in heat-resistive sealability, and to provide a sealing material having the same.SOLUTION: A rubber composition containing an ethylene-propylene-diene rubber is foamed to obtain the ethylene-propylene-diene rubber foam having a compression set of ≤30% at 24 hours after being compressed by 50% at 80°C for 22 hours and then released at 23°C, and a content proportion of a sulfur atom of ≤1,000 ppm in terms of mass as calculated based on a measurement result by fluorescent X-ray measurement. The sealing material is obtained which has the ethylene-propylene-diene rubber foam, and an adhesive layer provided on at least one surface of the ethylene-propylene-diene rubber foam.