US 12,391,396 B2
Multi-layer thermoplastic spray coating system for high performance sealing on airplanes
Weidong Song, Woodinville, WA (US)
Assigned to THE BOEING COMPANY, Arlington, VA (US)
Filed by The Boeing Company, Chicago, IL (US)
Filed on Nov. 29, 2022, as Appl. No. 18/070,851.
Application 18/070,851 is a division of application No. 16/367,671, filed on Mar. 28, 2019, granted, now 11,591,103.
Prior Publication US 2023/0092373 A1, Mar. 23, 2023
Int. Cl. B32B 7/02 (2019.01); B05D 1/02 (2006.01); B60K 15/03 (2006.01); B64D 37/06 (2006.01); B32B 7/04 (2019.01); B32B 7/08 (2019.01)
CPC B64D 37/06 (2013.01) [B05D 1/02 (2013.01); B60K 15/03 (2013.01); B32B 7/02 (2013.01); B32B 7/04 (2013.01); B32B 7/08 (2013.01); B60K 2015/03032 (2013.01); B60K 2015/03447 (2013.01)] 20 Claims
 
1. A seal for a substrate, said seal comprising a multi-layer sealant, said multi-layer sealant comprising:
a first thermoplastic polymer layer applied to a substrate, said first thermoplastic polymer layer comprising a first thermoplastic polymer, said first thermoplastic polymer comprising at least one of: a thermoplastic co-polyester, a co-polymer of vinylidene fluoride and hexafluoropropylene, a thermoplastic polyurethane, a thermoplastic vulcanizate, a thermoplastic polyolefin elastomer, a styrene block co-polymer, a fluoroelastomer, and combinations thereof;
a second thermoplastic polymer layer deposited onto said first thermoplastic polymer layer, said second thermoplastic polymer layer comprising a second thermoplastic polymer, said second thermoplastic polymer comprising at least one of: a polyether ether ketone, a polyether ketone ketone, a polyamide, a polysulfone, a polyphenylsulfone, a polyetheramide, and combinations thereof;
wherein the first thermoplastic polymer is different than the second thermoplastic polymer; and
wherein the first thermoplastic polymer layer comprises an adhesion value ranging from about 10 lbs/in to about 30 lbs/in wide area in 90° peel test according to ASTM D6862-11 (2016).