C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 41/63 (2006.01) C04B 41/48 (2006.01) C09D 167/00 (2006.01) E04C 2/04 (2006.01)
Patent
CA 2427439
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.
L'invention concerne un procède permettant de recouvrir les rives sciées d'un panneau mural en gypse afin d'éviter le poudrage de particules de gypse dans des chambres blanches. Ce procédé consiste à appliquer un polymère dispersible dans l'eau sur les rives sciées du panneau mural en gypse. Ledit polymère forme un sel insoluble dans l'eau par échange ionique avec le calcium se trouvant dans ledit panneau mural. On obtient ainsi un revêtement résistant, non collant et à séchage rapide qui réduit sensiblement les niveaux de particules de gypse provenant des rives sciées des panneaux muraux en gypse.
Mcfadden Fincham
National Gypsum Properties Llc
LandOfFree
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