US 2018/0305257 A1

Gypsum set accelerator and method of preparing same

(22) 12.03.2018

(43) 25.10.2018

(57) A modified gypsum set accelerator and a method of preparing the same is provided, which includes dry loose finely ground particles of a mixture of ground dry calcium sulfate dihydrate and a grinding aid selected from one or more of beta-naphthalene sulfonate formaldehyde condensate, trimetaphosphate phosphate salt, tripolyphosphate salt, tetra-pyrophosphate salt, and pregelatinized starch.

(71) United States Gypsum Company, Chicago, IL (US)

(73) United States Gypsum Company, Chicago, IL (US)

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