Joint compound and method of making 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.
Claims33
A joint compound, comprising water, calcium carbonate, and a water-soluble polymeric set retarder formed from a monomer having at least two carboxyl groups.
A joint compound, comprising
- about 20 wt. % to about 37 wt. % water;
- about 10 wt. % to about 90 wt. % calcium carbonate;
- about 0.5 wt. % to about 5 wt. % mica;
- about 0.5 wt. % to about 5 wt. % attapulgite clay;
- about 1 wt. % to about 4 wt. % latex;
- 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 carboxyl groups.
A method of producing a joint compound, comprising the step of forming a mixture of a water-soluble polymeric set retarder formed from a monomer having at least two carboxyl groups, water, and calcium carbonate.
Dependencies are inferred from the claim text.