US 12,459,231 B2
Building boards with increased surface strength
Robin Daniel Fisher, Loughborough (GB); Devang Umesh Khariwala, Hudson, MA (US); Jeffrey Hamilton Peet, Southborough, MA (US); and Peter Mayer, Tampa, FL (US)
Assigned to Saint-Gobain Placo SAS, Courbevoie (FR)
Filed by Saint-Gobain Placo SAS, Courbevoie (FR)
Filed on Jan. 23, 2024, as Appl. No. 18/419,682.
Application 18/419,682 is a continuation of application No. 17/903,263, filed on Sep. 6, 2022, granted, now 11,878,486.
Application 17/903,263 is a continuation of application No. 14/583,897, filed on Dec. 29, 2014, granted, now 11,433,645, issued on Sep. 6, 2022.
Application 14/583,897 is a continuation in part of application No. 14/143,421, filed on Dec. 30, 2013, abandoned.
Application 14/583,897 is a continuation in part of application No. 14/143,338, filed on Dec. 30, 2013, abandoned.
Prior Publication US 2024/0157676 A1, May 16, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. B32B 13/08 (2006.01); E04C 2/04 (2006.01)
CPC B32B 13/08 (2013.01) [E04C 2/043 (2013.01); B32B 2255/12 (2013.01); B32B 2255/26 (2013.01); B32B 2307/54 (2013.01); B32B 2419/00 (2013.01); B32B 2607/00 (2013.01); Y10T 428/24488 (2015.01); Y10T 428/24496 (2015.01); Y10T 428/24612 (2015.01); Y10T 428/249968 (2015.04); Y10T 428/273 (2015.01)] 20 Claims
OG exemplary drawing
 
1. A gypsum-based building board with enhanced nail pull strength, the composite building board comprising:
first and second liners each having an interior face, the first liner comprising paper having an exterior face forming an outer face of the building board;
a set gypsum plaster core positioned between and bonded with the interior face of the first liner and the interior face of the second liner; and
a coating of a coating polymer on the exterior face of the first liner, the coating having a tensile modulus above 500 psi and an elongation at break of greater than 500% at room temperature and improving a nail pull strength of the building board relative to an identical building board without the coating.