Patent ID: 8748515

Claim:
A settable gypsum composition, comprising: a gypsum slurry, consisting of a standard calcium sulfate hemihydrate gypsum and at least about 35 percent by weight of water; and a combination of at least one first additive and a second additive, wherein the first additive is a vinyl acetate/ethylene copolymer in latex or emulsion form; and the second additive is at least one of (i) a wetting agent and/or a surfactant having an HLB of from about 3 to about 16; (ii) a titanium coupling agent, (iii) a zirconium coupling agent, and (iv) mixtures thereof, and wherein the first and second additives are in the gypsum slurry in weight ratios of about 0.001:100 to about 10.0:100 based on the combined weight of the first and second additives to the weight of the gypsum slurry.