Method of edge-sealing gypsum board for clean room quality
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United States of America Patent
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Oct 22, 2002
Grant Date -
Jun 6, 2002
app pub date -
Dec 6, 2000
filing date -
Dec 6, 2000
priority date (Note) -
Expired
status (Latency Note)
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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.
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