Method of edge-sealing gypsum board for clean room quality
AssigneeNational Gypsum Properties, LLC
InventorDaniel A. Winkowski
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Abstract
A method for coating the sawed edges of gypsum wallboard to prevent dusting of gypsum particles in clean rooms. The method includes applying a water-dispersible polymers to the sawed edges of gypsum wallboard. The polymer forms a water-insoluble salt through an ion exchange with the calcium found in gypsum wallboard. The result is a tough, tack free, fast-drying coating that substantially reduces the levels of airborne gypsum particles that come from the sawed edges of gypsum wallboards.
Claims20
A method for sealing cut edges of a gypsum panel comprising coating one or more cut edges of said panel with an effective amount of a composition comprising water and a water-dispersible alkali metal sulfonate-containing polymer.
A gypsum wallboard panel with cut edges having a coating composition thereon of a water-dispersible polymer, wherein the coating composition comprises water and a water-dispersible alkali metal sulfonate-containing polymer.
Dependencies are inferred from the claim text.