US 11,752,732 B2
Composite metallic panel
Wenyi Huang, Midland, MI (US); Ernest Herst, Midland, MI (US); and Mark Beach, Midland, MI (US)
Assigned to DDP SPECIALTY ELECTRONIC MATERIALS US, LLC, Wilmington, DE (US)
Filed by DDP SPECIALTY ELECTRONIC MATERIALS US, LLC, Wilmington, DE (US)
Filed on Sep. 17, 2021, as Appl. No. 17/478,266.
Claims priority of provisional application 63/091,356, filed on Oct. 14, 2020.
Prior Publication US 2022/0111617 A1, Apr. 14, 2022
Int. Cl. B32B 7/12 (2006.01); B32B 15/01 (2006.01)
CPC B32B 7/12 (2013.01) [B32B 15/016 (2013.01); B32B 2250/02 (2013.01); B32B 2255/06 (2013.01); B32B 2255/26 (2013.01); B32B 2607/00 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A composite panel comprising:
first and second aluminum sheets each having an inner and outer surface,
a primer coating based on a silane, a siloxane or a blend of silane and polyurethane on the inner surface of the first and second aluminum sheets and
an organosilicon adhesive contacting the primer coating on both the first and second metallic sheets, wherein
the adhesive has a gross heat of combustion (Q-PCS) of no greater than 1.4 MJ/m2 and
the panel is compliant with specification EN 13501-6:2018, classification A1; and
wherein the composite panel has the structure, comprising in order,
i) the first aluminum sheet,
ii) the primer coating on the inner surface of the first aluminum sheet,
iii) the organosilicon adhesive,
iv) the primer coating on the inner surface of the aluminum sheet, and
v) the second aluminum sheet.