Pigment for blocking tannin migration
AssigneeThe Dow Chemical Company
InventorsVictor E. Meyer, Rex R. Stevens
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Abstract
A process for inhibiting the staining of film-forming finishes applied to a tannin-containing wood substrate comprises applying to the wood substrate, prior to or concurrently with the surface film, an aqueous formulation containing a stain-inhibiting amount of magnesium hydroxide having a high surface area, thereby forming a leach-resistant magnesium hydroxide-tannin complex.
Claims6
The process of inhibiting the staining of a film-forming finish applied to a tannin-containing wood substrate which comprises the step of applying to the wood substrate, prior to or concurrently with the film-forming finish, a latex primer paint containing from about 1.0 to about 20.0 weight percent of magnesium hydroxide based on the total weight of the solvent system, said magnesium hydroxide having a surface area of at least 50 square meters per gram, thereby forming a leach-resistant magnesium hydroxide-tannin complex.
Dependencies are inferred from the claim text.