Joint finishing adhesive
AssigneeUnited States Gypsum Company
InventorsRobert H. Negri, Donghong Li, Rafael Bury
Life of this patent
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Abstract
Provided is an adhesive composition suitable for fortifying panel joints in construction, the adhesive composition comprising a polymeric binder, filler and thickener, wherein the binder is selected from acrylic acid polymers, acrylic acid copolymers, alkyds, polyurethanes, polyesters, epoxies, and combinations thereof and wherein the viscosity of the composition is the range from 100 to 200 Brabender Units and density is in the range from about 7.5 lbs/gal to about 10 lbs/gal. Methods of using the adhesive composition in wall assembly are provided as well.
Claims9
An adhesive composition comprising a polymeric binder, filler, rheological modifier and associative thickener, wherein the binder is a combination of Polyvinyl Acetate with Polyvinyl Alcohol in an amount from 10% to 40% by weight, the filler is a combination of attapulgite clay in an amount from 0.5% to 1.5% by weight and kaolin clay in an amount from 5% to 15% by weight, the rheological modifier is at least one hydroxyethyl cellulose based rheological modifier in an amount from 0.01% to 20% by weight, the associative thickener is at least one polyacrylate based associative thickener and used in an amount from 0.01% to 20% by weight, and wherein the composition further comprises a surfactant in an amount from 0.01% to 1% and a defoamer in an amount from 0.01% to 1%;
- wherein the composition has a viscosity in the range from 100 to 200 Brabender Units and density in the range from 7.5 lbs/gal to 10 lbs/gal.
Dependencies are inferred from the claim text.