Container closures, sealed containers and sealing compositions for them
AssigneeW. R. Grace & Co.-Conn.
InventorsDavid N. Samuel, Richard S. Williams
Life of this patent
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Abstract
A sealing composition for a container closure comprises a polymeric matrix material and its oxygen permeability is reduced by incorporating ethylene vinyl alcohol polymer into the composition. The composition can be in fluid or meltable form ready for application to a closure or it can be present as a deposit on the closure, for instance a gasket around the closure.
Claims4
A sealing composition having reduced oxygen permeability consisting essentially of a matrix formed of a blend of polyethylene and an elastomer selected from the group consisting of styrene butadiene styrene polymers, ethylene propylene copolymers, ethylene propylene diene copolymers and blends thereof;
- and an ethylene vinyl alcohol polymer.
Dependencies are inferred from the claim text.