Joint compound and method of using same
AssigneeNational Gypsum Properties, LLC
InventorsAmba Ayambem, Gopalakrishnan Sethuraman, Richard E. Smith
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Abstract
A joint compound includes water, calcium carbonate, and a water-soluble polymeric set retarder formed from a monomer having two or more carboxyl groups. The joint compound is useful in various applications and in a hybrid joint compound made with a calcium sulfate hemihydrate setting-type joint compound.
Claims23
A joint compound, comprising
- about 20 wt. % to about 37 wt. % of water;
- at least about 50 wt. % of calcium carbonate;
- and
- about 0.001 wt. % to about 0.5 wt. % of a water-soluble polymeric set retarder formed from a monomer having at least two moieties bound to successive carbon atoms, wherein the successive carbon atoms form at least part of the polymeric backbone of the polymeric set retarder, and wherein the at least two moieties each contain at least one carboxyl group.
A joint compound consisting essentially of about 20 wt. % to about 37 wt. % of water;
- at least about 50 wt. % of calcium carbonate;
- and
- about 0.001 wt. % to about 0.5 wt. % of a water-soluble polymeric set retarder formed from a monomer having at least two moieties bound to successive carbon atoms, wherein the successive carbon atoms form at least part of the polymer backbone of the polymeric set retarder, and wherein the at least two moieties each contain at least one carboxyl group.
A joint compound consisting of
- about 20 wt. % to about 37 wt. % of water;
- at least about 50 wt. % of calcium carbonate;
- and
- about 0.001 wt. % to about 0.5 wt. % of a water-soluble polymeric set retarder formed from a monomer having at least two moieties bound to successive carbon atoms, wherein the successive carbon atoms form at least a part of the polymer backbone of the polymeric set retarder, and wherein the at least two moieties each contain at least one carboxyl group.
A method of producing a joint compound, the method comprising combining a water-soluble polymeric set retarder formed from a monomer having at least two moieties on at least two successive carbon atoms, water, and calcium carbonate to form a stable, drying-type/setting-type hybrid composition;
- wherein the at least two moieties each contain at least one carboxyl group and the at least two successive carbon atoms form at least a part of the polymer backbone-of the polymeric set retarder.
Dependencies are inferred from the claim text.