Abstract: An EMI/RFI shielding coating composition and method of using to produce a coating with good cohesion and a resistance of less than 1.0 ohms/square at a coating thickness of less than 1.5 mils includes:(a) between about 7% and about 65% by weight of a thermoplastic aqueous emulsion;(b) between about 1.5% and 10% by weight of an aqueous urethane, alkyd, epoxy, polyester, or vinyl dispersion;(c) between about 0.1% and 5% by weight of a glycol, alcohol, ketone, ester, aromatic or aliphatic coalescing solvent;d) between about 0.1% and about 5.0% by weight of conductive clay or silica;e) between about 0.01% and about 5.0% by weight of a polyacrylate resin;f) particles of conductive metal such as copper, silver, nickel or gold, or mixtures thereof;g) one or more defoaming agents; andh) water.

Abstract: A coating composition for shielding plastic against electromagnetic interference (EMI) and radio frequency interference (RFI). The composition includes an aqueous dispersion thermoplastic emulsion, an aqueous urethane dispersion, a glycol-based coalescing solvent, silver-plated copper flakes, conductive clay and one or more defoamers.