Composite protective coating for combustible cartridge cases
AssigneeThe United States of America as represented by the Secretary of the Army
InventorJohn Brzuskiewicz
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Abstract
Porous combustible cartridge cases containing nitrocellulose, reinforcing bers and a resinous binder, are rendered resistant to water and oil by coating the surface with a composite coating containing an undercoating of polyvinyl alcohol and a top coating of a copolymer of vinylidene chloride and acrylonitrile.
Claims4
A porous combustible cartridge case comprising nitrocellulose, reinforcing fibers and a resinous binder, wherein at least the exterior surface of the case is covered with a composite protective coating comprising an undercoating consisting essentially of a polyvinyl alcohol resin and a topcoating consisting essentially of a vinylidene chloride-acrylonitrile copolymer resin.
Dependencies are inferred from the claim text.