US 11,746,534 B2
Sound damping wallboard and method of constructing a sound damping wallboard
Stephen A. Cusa, Downingtown, PA (US); Michael N. Blades, Indian Land, SC (US); Richard P. Weir, Indian Trail, NC (US); and John W. Mixson, Charlotte, NC (US)
Assigned to Gold Bond Building Products, LLC, Charlotte, NC (US)
Filed by National Gypsum Properties, LLC, Charlotte, NC (US)
Filed on Feb. 5, 2016, as Appl. No. 15/17,362.
Claims priority of provisional application 62/112,560, filed on Feb. 5, 2015.
Prior Publication US 2016/0230395 A1, Aug. 11, 2016
Int. Cl. E04B 1/86 (2006.01); E04F 13/08 (2006.01); E04F 13/14 (2006.01); E04B 1/99 (2006.01); E04B 1/84 (2006.01)
CPC E04F 13/0867 (2013.01) [E04B 1/86 (2013.01); E04B 1/99 (2013.01); E04F 13/0875 (2013.01); E04F 13/14 (2013.01); E04B 2001/8461 (2013.01); E04F 2290/043 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A sound damping wallboard system for a building structure comprising a first wallboard fastened to the building structure, comprising:
a second wallboard comprising:
a gypsum layer having a gypsum layer inner surface and a gypsum layer outer surface;
a sound damping layer disposed at the gypsum layer inner surface, and having a sound damping layer inner surface opposite the gypsum layer inner surface;
wherein the sound damping layer is formed by applying an adhesive composition comprising a dispersion including an acrylate copolymer and water at the gypsum layer inner surface;
a first encasing layer disposed at the gypsum layer outer surface;
a second encasing layer disposed at the sound damping layer inner surface, wherein the second encasing layer is formed of a material comprising paper, fiberglass, foil, a polymer, or a combination thereof; and
wherein the second wallboard is fastened to the first wallboard with the sound damping layer disposed between the gypsum layer and the first wallboard.