Patent ID: 8273808

Claim:
A gypsum composition comprising: a binder comprising at least 30 wt % gypsum relative to a total weight of the binder; and a polymer P comprising: a main chain containing hydrocarbon groups; at least one side chain including at least one acid group, the acid group selected from the group consisting of a carboxylic acid group, a sulfonic acid group, a phosphonic acid group, a phosphoric acid group, and a salt thereof; and at least one polyoxyalkylene group, wherein the polyoxylalkylene group is connected to the main chain through a linkage, the linkage including at least one ester, amide, or imide group; wherein: the polymer P is a dispersant for the gypsum composition; and the polymer P has an acid content of 1.8 to 4 mmol acid groups per gram of polymer.