Antimicrobial drywall
AssigneeVerichem, Inc.
InventorsPaul Carlson, H. Nehus
Life of this patent
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Abstract
Antimicrobial guanidine compounds are used, either alone or with at least one other antimicrobial compound, to make mildew-resistant wallboard. Particularly useful co-additives are o-phenyl phenol and sodium methyldithiocarbamate. The antimicrobial compound(s) may be added to the covering, the core body, an adhesive at the interface of the core body and the covering, or all three of these sites. A preferred guanidine compound is dodecyl guanidine hydrochloride.
Claims20
A wallboard which inhibits the growth of microbes, said wallboard comprising a gypsum core and at least one covering, said wallboard having incorporated therein an antimicrobial guanidine compound.
A method of making mildew-resistant wallboard comprising adding an antimicrobial guanidine compound to at least one component of said wallboard during the manufacture of said wallboard.
A method of making a mildew-resistant paper covering for wallboard comprising adding an antimicrobial guanidine compound to said paper during or after manufacture of said paper covering.
Dependencies are inferred from the claim text.