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US 12,459,231 B2Granted
Building boards with increased surface strength
AssigneeSaint-Gobain Placo
InventorsRobin Daniel Fisher, Devang Umesh Khariwala, Jeffrey Hamilton Peet, Peter Mayer
Life of this patent
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Abstract
Disclosed is a building board construction with increased surface strength. More specifically, increased nail pull strength is achieved via the application of an external surface coating. The surface coating is ideally applied to a paper faced gypsum building board. In one possible embodiment, the coating is formed from a water soluble polymer.
Claims20
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.
1 more element
A gypsum-based building board with enhanced nail pull strength, the gypsum-based building board comprising:
- an exterior paper face forming an outer face of the building board;
- a set gypsum plaster core positioned beneath the exterior paper face;
- and
- a coating of a coating polymer on an outer surface of the exterior paper face of the building board, 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 by at least 10%.
1 more element
Dependencies are inferred from the claim text.