Method of improving dispersant efficacy in making gypsum products

摘要

Disclosed is a gypsum-containing slurry comprising: water, stucco, sodium trimetaphosphate, and a naphthalenesulfonate dispersant, wherein the sodium trimetaphosphate is present in an amount of 0.12% to 0.4% by weight based on the weight of stucco. Also disclosed a gypsum wallboard comprising said slurry and a method for making said gypsum wallboard.