Rapidly Curable Electrically Conductive Clear Coatings
AssigneePPG Industries Ohio, Inc.
InventorsMark P. Bowman, Lawrence G. Anderson, Gordon L. Post
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Abstract
Rapidly curable electrically conductive clear coatings are applied to substrates. The electrically conductive clear coating includes to clear layer having a resinous binder with ultrafine non-stoichiometric tungsten oxide particles dispersed therein. The clear coating may be rapidly cured by subjecting the coating to infrared radiation that heats the tungsten oxide particles and surrounding resinous binder. Localized heating increases the temperature of the coating to thereby thermally cure the coating, while avoiding unwanted heating of the underlying substrate.
Claims27
A coated substrate comprising:
- a substrate;
- and
- a rapidly curable electrically conductive clear coating over at least a portion of the substrate, wherein the coating comprises at least one clear layer comprising:
- a binder;
- and
- ultrafine non-stoichiometric tungsten oxide particles dispersed in the binder.
A method of applying an electrically conductive clear coating on a substrate comprising:
- applying a clear coating composition comprising a binder and ultrafine non-stoichiometric tungsten oxide particles onto the substrate;
- and
- subjecting the applied clear coating composition to infrared radiation to thereby heat and thermally cure the clear coating composition.
A method of curing a clear coating composition applied to a substrate, the method comprising subjecting the clear coating composition to infrared radiation to thereby heat the clear coating composition to a curing temperature of at least 50° C. while maintaining the substrate at a temperature at least 10° C. less than the curing temperature of the clear coating composition, wherein the resultant coated substrate has a surface resistance of less than 1.0×1010 Ω/square.
Dependencies are inferred from the claim text.