Optimizing gray primer in multilayer coatings
AssigneeE. I. Du Pont de Nemours and Company
InventorAllan Blase Joseph Rodrigues
Life of this patent
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Abstract
A method for applying multiple layers of coating compositions on a previously painted substrate by first applying a primer coating and then applying over the primer coating a top coating that matches the color of the painted substrate at less than complete hiding to achieve a color match of the top coating and the previously painted substrate; the improvement used is to apply a gray or white primer coating at complete hiding having a reflectance in its dried state essentially the same as the top coating measured at the wave length of minimum absorption of the top coating.
Claims6
A method for applying multiple layers of coating compositions on a previously painted substrate by first applying a layer of a coating of a primer composition and then applying over the primer coating a top coating that matches the color of the painted substrate at less than complete hiding to achieve a color match of the top coating and the previously painted substrate which comprises applying a gray or white primer composition at complete hiding having a reflectance in its dried state which is essentially the same as the top coating measured at the wave length of minimum absorption of the top coating.
Dependencies are inferred from the claim text.