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US 10,294,375 B2Granted
Electrically conductive coatings containing graphenic carbon particles
AssigneePPG Industries Ohio, Inc.
InventorsDavid B. Asay, Noel R. Vanier, Cheng-Hung Hung, Eldon L. Decker
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Abstract
Coating compositions containing graphenic carbon particles are disclosed. The graphenic carbon particles may be thermally produced and dispersed in thermoset and/or thermoset polymeric film coatings. The cured coatings exhibit desirable properties such as increased electrical conductivity.
Claims22
An electrically conductive coating composition comprising:
- a film-forming resin;
- and
- thermally produced graphenic carbon particles produced by heating a precursor material comprising a methane or a hydrocarbon material capable of forming a two-carbon-fragment species in a thermal zone having a temperature of greater than 3,500° C. to form the graphenic carbon particles from the precursor material, wherein the thermally produced graphenic carbon particles comprise 3 or more carbon atom layers, have an average aspect ratio of greater than 3:1, a B.E.T. specific surface area of at least 50 square meters per gram, and a Raman spectroscopy 2D/G peak ratio of at least 1.1:1, and wherein when the coating composition is cured it has an electrical conductivity greater than an electrical conductivity of the same coating composition without the thermally produced graphenic carbon particles.
An electrically conductive coating comprising:
- a polymeric resin film;
- and
- thermally produced graphenic carbon particles dispersed in the polymeric resin film produced by heating a precursor material comprising a methane or a hydrocarbon material capable of forming a two-carbon-fragment species in a thermal zone having a temperature of greater than 3,500° C. to form the graphenic carbon particles from the precursor material, wherein the thermally produced graphenic carbon particles comprise 3 or more carbon atom layers, have an average aspect ratio of greater than 3:1, a B.E.T. specific surface area of at least 50 square meters per gram, and a Raman spectroscopy 2D/G peak ratio of at least 1.1:1.
Dependencies are inferred from the claim text.