Conductive-resistive surface coating compositions and methods
AssigneeElectro Forming Systems Co., Inc.
InventorFred D. Brandt
Life of this patent
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Abstract
The invention provides compositions and methods for forming conductive-resistive coatings on non-conductive surfaces. A pre-conductive coating composition contains a lacquer base, including nitrocellulose as a base solid and butyl acetate as a solvent, and a conductive agent. The pre-conductive coating composition is applied to a surface to be coated and allowed to dry. After drying, the pre-conductive coating is exposed to a developer capable of developing the pre-conductive coating to yield a selected conductive-resistive capacity to a final, conductive-resistive coating. The resistance of this final coating can be finely selected for different applications, including a variety of application which employ the conductive-resistive coating as a self-heating surface coating.
Claims28
A method for forming a conductive-resistive coating on a non-conductive surface comprising the steps of:
- applying a pre-conductive coating composition comprising a lacquer base containing butyl acetate as a solvent and a conductive agent onto said non-conductive surface to form a pre-conductive coating;
- exposing said pre-conductive coating to a developer to confer a conductive-resistive capacity to said pre-conductive coating to yield a conductive-resistive coating;
- and
- exposing the conductive-resistive coating to an aqueous rinse having a pH between about pH 5.0 and pH 6.8 after said step of exposing the pre-conductive coating to the developer.
A method for forming a self-heating, conductive-resistive coating on a non-conductive surface comprising the steps of:
- applying a pre-conductive coating composition comprising a lacquer base containing butyl acetate as a solvent and a conductive agent onto said non-conductive surface to form a pre-conductive coating;
- exposing said pre-conductive coating to a developer to confer a conductive-resistive capacity to said pre-conductive coating to yield a conductive-resistive coating;
- and
- exposing the conductive-resistive coating to an aqueous rinse having a pH between about pH 5.0 and pH 6.8 after said step of exposing the pre-conductive coating to the developer.
A method for forming a conductive-resistive coating on a non-conductive surface comprising the steps of:
- applying a pre-conductive coating composition comprising a lacquer base containing butyl acetate as a solvent and a conductive agent onto said non-conductive surface to form a Pre-conductive coating;
- exposing said pre-conductive coating to a developer to confer a conductive-resistive capacity to said pre-conductive coating to yield a conductive-resistive coating;
- and
- exposing the conductive-resistive coating to an aqueous rinse having a pH between about pH 5.0 and pH 6.8 after said step of exposing the pre-conductive coating to the developer, wherein a final resistance of the conductive-resistive coating is achieved within a range of between about 0.2 and 42.0 ohms/inch.sup.2.
A method for forming a self-heating, conductive-resistive coating on a non-conductive surface comprising the steps of:
- applying a pre-conductive coating composition comprising a lacquer base containing butyl acetate as a solvent and a conductive agent onto said non-conductive surface to form a pre-conductive coating;
- exposing said pre-conductive coating to a developer to confer a conductive-resistive capacity to said pre-conductive coating to yield a conductive-resistive coating;
- and
- exposing the conductive-resistive coating to an aqueous rinse having a pH between about pH 5.0 and pH 6.8 after said step of exposing the pre-conductive coating to the developer, wherein the conductive resistive coating has a thermal increase capacity of between 3.degree. F. and 275.degree. F.
Dependencies are inferred from the claim text.