	US 12,296,572 B2
	Sound damping gypsum board and method of constructing a sound damping gypsum board
Joseph J. Bailey, Charlotte, NC (US); Richard Weir, Indian Trail, NC (US); R. G. Iyer, Charlotte, NC (US); Eli Stav, Charlotte, NC (US); and Bradley J. Busche, Shelby, NC (US)
Assigned to Gold Bond Building Products, LLC, Charlotte, NC (US)
Filed by Gold Bond Building Products, LLC, Charlotte, NC (US)
Filed on Aug. 21, 2023, as Appl. No. 18/452,645.
Application 18/452,645 is a continuation of application No. 17/338,880, filed on Jun. 4, 2021, granted, now 11,772,372.
Claims priority of provisional application 63/035,203, filed on Jun. 5, 2020.
Prior Publication US 2023/0391064 A1, Dec. 7, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. B32B 37/15 (2006.01); B32B 7/12 (2006.01); B32B 9/00 (2006.01); G10K 11/168 (2006.01)

CPC B32B 37/15 (2013.01) [B32B 7/12 (2013.01); B32B 9/005 (2013.01); G10K 11/168 (2013.01); B32B 2255/26 (2013.01); B32B 2307/102 (2013.01); B32B 2419/00 (2013.01)]

19 Claims

1. A method of forming a gypsum board, the method comprising:

providing a first encasing layer,

depositing a gypsum slurry comprising stucco and water on the first encasing layer to form a gypsum core,

providing a second encasing layer having a first sound damping layer thereon on the gypsum slurry, wherein the first sound damping layer is between the gypsum slurry and the second encasing layer and wherein the first sound damping layer includes at least 50 wt. % of a first sound damping polymer, and

allowing the stucco to convert to calcium sulfate dihydrate.