Airless spray method for depositing electroconductive tin oxide coatings
AssigneePPG Industries, Inc.
InventorsWilliam E. Wagner, James A. Davis
Life of this patent
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Abstract
Electroconductive tin oxide coatings are deposited by an airless method of spraying a liquid composition of a thermally decomposable tin compound onto a hot glass surface in order to prevent overspray of the liquid coating composition onto the opposite glass surface.
Claims10
In a method for forming a film on a nonmetallic substrate by thermal decomposition of a metal-containing coating reactant, a solution of which is sprayed onto a primary surface at a temperature sufficient to thermally decompose the coating reactant, the improvement which comprises:
- spraying the coating solution in the absence of atomizing air using hydraulic pressure to form a spray.
A method for depositing an electroconductive tin oxide coating onto a glass substrate comprising the steps of:
- a. preparing an electrically nonconductive coating solution comprising a thermally decomposable tin compound and a polar solvent;
- b. atomizing said solution by means of hydraulic pressure;
- c. placing an electrostatic charge on said solution;
- d. heating a glass substrate to a temperature sufficient to thermally decompose the tin compound;
- e. placing a grounded metal plate in substantially parallel facing spaced relationship from one primary surface of the glass substrate;
- and
- f. applying said atomized coating solution to the primary surface of said heated glass substrate opposite the surface facing said grounded metal plate.
Dependencies are inferred from the claim text.