Patent ID: 11873259
Assignee: CERTAINTEED GYPSUM, INC.
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  B  E  Y | IPC B  C  E

Claim 3:
4. A method of producing building board, the method utilizing starch, stucco, and water, the method comprising:
combining the starch with air to form aerated starch pellets, the aerated pellets being slightly soluble at temperatures below approximately 130° F.;
mixing the aerated starch pellets with the stucco and the water to form a slurry, with the mixing serving to fully encapsulate the pellets within the slurry;
dispensing the slurry between opposing sheets to form a composite panel;
drying the composite panel, the drying causing the aerated pellets to dissolve and the slurry to set, whereby the dissolved pellets provide starch to the slurry and create voids within the set slurry.