US 12,312,820 B2
Composite structural board and wall systems containing same
Wazir Nobbee, Chesterfield, VA (US); Jesse C. Thrower, II, Midlothian, VA (US); James Dean Katsaros, Midlothian, VA (US); Stephane Costeux, Midland, MI (US); John Neill, Bristol (GB); William Brian Lieburn, Plain City, OH (US); and Bryn Thomas, Bristol (GB)
Assigned to DUPONT SAFETY & CONSTRUCTION, INC., Wilmington, DE (US)
Filed by DUPONT SAFETY & CONSTRUCTION, INC., Wilmiington, DE (US)
Filed on Oct. 13, 2023, as Appl. No. 18/486,507.
Application 18/486,507 is a division of application No. 16/993,730, filed on Aug. 14, 2020, granted, now 11,821,220.
Claims priority of provisional application 62/901,929, filed on Sep. 18, 2019.
Prior Publication US 2024/0035288 A1, Feb. 1, 2024
Int. Cl. B32B 7/12 (2006.01); E04B 1/68 (2006.01); E04B 2/02 (2006.01); E04F 19/02 (2006.01); E04F 19/04 (2006.01); F16J 15/02 (2006.01); E04B 1/24 (2006.01)
CPC E04F 19/04 (2013.01) [B32B 7/12 (2013.01); E04B 1/68 (2013.01); E04B 2/02 (2013.01); E04F 19/022 (2013.01); F16J 15/028 (2013.01); B32B 2307/718 (2013.01); B32B 2307/724 (2013.01); B32B 2307/748 (2013.01); B32B 2607/00 (2013.01); E04B 2001/2451 (2013.01); E04B 2002/0276 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A composite structural board comprising:
a) a structural board; and
b) a water-resistant barrier sheet having a basis weight 100 g/m2 or less, a hydrostatic head of 55 cm or greater, a Gurley Hill porosity of 250 seconds or greater, and a moisture vapor transmission rate, of at least 130 g/m2/24 hrs, the water-resistant barrier sheet having an inner face and an outer face; and
wherein a face of the structural board is discontinuously attached to the inner face of the water-resistant barrier sheet by a permanent adhesive and a non-permanent adhesive, wherein the board has a section using the non-permanent adhesive between the structural board and the water-resistant barrier sheet that can be peeled apart from the board for nailing or taping and then re-applied, the water-resistant barrier sheet fully covering the face of the structural board;
wherein the composite structural board has
i) attached areas between the face of the structural board and the inner face of the water-resistant barrier sheet, and
ii) unattached areas between the face of the structural board and the inner face of the water-resistant barrier sheet;
the unattached areas between the face of the structural board and the inner face of the water-resistant barrier sheet defining paths by which a liquid can move between the face of the structural board and the inner face of the water-resistant barrier sheet.