Joint compound providing low dusting and good gloss retention
AssigneeUnited States Gypsum Company
InventorsSalvatore C. Immordino, Jr., Richard B. Stevens
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Abstract
The present invention provides a low dusting joint compound comprising a filler, a binder, a thickener and one or more synthetic polymeric waxes that are at least slightly soluble in water and are solid at room temperature. Preferably the wax includes a high molecular weight polyethylene glycol or methoxy polyethylene glycol having an average melting point of from about 80° F. (27° F.) to about 150° F. (80° C.). These additives impart low dusting properties without a sticky or oily feel. High molecular weight synthetic waxes also act as an internal binder to hold the joint compound together and improves paint gloss retention. The invention results in a joint compound with improved properties for drywall finishing.
Claims22
A joint compound composition comprising a filler, a binder, a thickener and one or more synthetic polymeric waxes, wherein each of said one or more waxes is at least slightly soluble in water and forms a solid at room temperature.
A method of finishing a joint between adjacent gypsum board panels comprising applying a composition to said joint, said composition comprising water, a filler, a binder, a thickener and at one or more synthetic polymeric waxes, each of which is at least slightly soluble in water and forms a solid at room temperature.
Dependencies are inferred from the claim text.