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US 6,270,853 B1Granted
Electrostatic powder coating of electrically non-conducting substrates
AssigneeRaytheon Company
InventorsLarry W. Brown, Srini Raghavan, Arthur McGinnis, James A. Leal
Life of this patent
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Abstract
A powder coating method includes applying an antistatic material to the surface of an electrically nonconducting substrate. The antistatic material is preferably a fatty amine salt and is applied by spraying. A flow of electrostatically charged powder particles is directed toward the substrate to form a powder coating on the substrate, and the powder coating is thereafter cured.
Claims13
A powder coating method, comprising the steps of:
- providing an electrically nonconducting substrate having a surface, the substrate being transparent to radio frequency radiation;
- applying an antistatic material coating to the surface of the substrate;
- directing a flow of electrostatically charged powder particles toward the surface of the substrate to form a powder coating on the surface of the substrate overlying the antistatic material coating, the antistatic material coating provided to dissipate electrical charges carried to the surface of the substrate by said charged powder particles;
- and
- heating the substrate with the antistatic material coating and powder coating thereon to a temperature sufficient to cure the powder coating and increase the electrical resistivity of the antistatic material coating so that the resultant coated substrate is electrically nonconducting and transparent to radio frequency radiation.
2 more elements
A powder coating method, comprising the steps of:
- providing an electrically nonconducting substrate having a surface, the substrate being transparent to radio frequency radiation;
- spraying a fatty amine salt onto the surface of the substrate to form an antistatic material coating;
- directing a flow of electrostatically charged powder particles toward the surface of the substrate to form a powder coating on the surface substrate overlying the antistatic material coating, the antistatic material provided to dissipate electrical charges carried to the surface of a substrate by said charged powder particles;
- and
- heating the substrate with the antistatic material coating and powder coating thereon to a temperature sufficient to cure the powder coating and increase the electrical resistivity of the antistatic material coating so that the resultant coated substrate is electrically nonconducting and transparent to radio frequency radiation.
2 more elements
Dependencies are inferred from the claim text.