Epoxy self-priming topcoats
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorsCharles R. Hegedus, Donald J. Hirst, Anthony T. Eng
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Abstract
A corrosion-resistant coating which can be applied directly to a surface as self-priming topcoat comprising an epoxy resin binder and a combination of pigments consisting essentially of an aluminum triphosphate, zinc salts of benzoic acids, and an alkaline earth metal phosphate such as zinc-barium phosphate. In addition, the coating contains up to about 30 parts by weight of a titanium dioxide pigment, up to about 2.0 parts by weight of an oil soluble surface active agent and up to about 50 parts by weight of at least one organic paint solvent.
Claims10
A corrosion-resistant self-priming coating comprising from about 15 to 50 parts by weight of an epoxy resin binder, 1 to 30 parts by weight of an alkaline earth metal phosphate, 0.1 to 5 parts by weight of a zinc benzoate, 1 to 25 parts weight of an aluminum triphosphate, 1 to 30 parts by weight of titanium dioxide, 0 to 2.0 parts by weight of an oil soluble surface active agent and 0 to 50 parts by weight of at least one organic solvent.
A process of preparing a corrosion-resistant self-priming epoxy coating on a substrate which comprises forming the coating by applying onto the substrate an organic solution comprising from about 15 to 50 parts by weight of an epoxy resin binder, 1 to 30 parts by weight of an alkaline-earth metal phosphate, 0.1 to 5.0 parts by weight of a zinc benzoate, 1 to 25 parts by weight of an aluminum triphosphate, 1 to 30 parts by weight of a titanium dioxide pigment, 0 to 2.0 parts by weight of a surface active agent and 0 to 50 percent by weight of at least one organic solvent.
Dependencies are inferred from the claim text.