US 12,188,230 B2
Fire-rated structural OSB panels with overlaid water-resistant barrier
Scott Johnson, Nashville, TN (US); and Brian St. Germain, Mt. Juliet, TN (US)
Assigned to LOUISIANA-PACIFIC CORP., Nashville, TN (US)
Filed by LOUISIANA-PACIFIC CORPORATION, Nashville, TN (US)
Filed on Feb. 13, 2023, as Appl. No. 18/168,518.
Application 18/168,518 is a continuation of application No. 17/491,367, filed on Sep. 30, 2021, granted, now 11,578,487.
Claims priority of provisional application 63/085,258, filed on Sep. 30, 2020.
Prior Publication US 2023/0203811 A1, Jun. 29, 2023
Int. Cl. E04C 2/28 (2006.01); B32B 21/06 (2006.01); B32B 37/15 (2006.01); E04B 2/00 (2006.01)
CPC E04C 2/28 (2013.01) [B32B 21/06 (2013.01); B32B 37/15 (2013.01); E04C 2/44 (2013.01); B32B 2250/02 (2013.01); B32B 2255/08 (2013.01); B32B 2255/12 (2013.01); B32B 2255/20 (2013.01); B32B 2262/101 (2013.01); B32B 2305/22 (2013.01); B32B 2305/77 (2013.01); B32B 2307/3065 (2013.01); B32B 2419/00 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A fire-resistant structural panel, comprising:
a base layer with a first surface and a second surface;
at least one water-resistant layer substantially coating the first surface, the at least one water-resistant layer comprising a resin-impregnated paper overlay; and
at least one fire-resistant layer substantially coating the second surface, the at least one fire-resistant layer comprising non-combustible magnesium oxide, the magnesium oxide layer applied as a coating of slurry to substantially cover the second surface;
wherein the base layer, the at least one fire-resistant layer, and the at least one water-resistant layer form are pre-formed and then cured into an integral panel.