Abstract
The leak repair of integral fuel tank sealant on military aircraft is both tedious and costly. The current system uses a polysulfide sealant. A polyurethane coating is used on the tank interior surfaces prior to sealant application. The polysulfide sealant fills the cavities, seams and rivets. The sealant-coating combination works well initially and there is apparently adequate adhesion of the polysulfide rubber to the polyurethane coating. Upon extended aircraft usage, however, leaks do develop. In the reported experiments, the authors studied coating aging, use of primers, and determined factors governing coating-sealant interfacial integrity. The results obtained were analyzed in terms of the chemical reactions involved, attractive forces, and other bonding considerations. A mechanism of adhesion in polysulfide integral fuel tank sealants is proposed.
| Original language | English |
|---|---|
| Pages (from-to) | 1081-1095 |
| Number of pages | 15 |
| Journal | Rubber Chemistry and Technology |
| Volume | 54 |
| Issue number | 5 |
| DOIs | |
| State | Published - 1981 |
ASJC Scopus subject areas
- Polymers and Plastics
- Materials Chemistry