COATING MATERIAL FOR THE PROTECTION OF AIRCRAFT INTEGRAL FUEL TANKS
Final rept. 1 Mar 1965-28 Feb 1966
PRODUCTS RESEARCH AND CHEMICAL CORP BURBANK CA
Pagination or Media Count:
A number of polysulfides, fluoroelastomers, polyurethanes, epoxides, polyols and polybutadiene copolymers were evaluated as potential one-package, fill and drain type surface coatings suitable for the preservation of aircraft integral fuel tanks against attack by corrosive elements. Very inferior acid, distilled water, and salt waterJRF resistance was found with polysulfide polymers which were cured with epoxides, isocyanates, or a combination of both. A surface coating derived from PR-1560-M Part A, an isocyanate adduct, and Hycar MTBN, a mercaptan-terminated polybutadiene acrylonitile copolymer, exhibited good acid, water and fuel resistance. The adhesion to MIL-C-5541 Alodined aluminum surfaces was marginal and could only be improved at the expense of acid resistance. Isocyanate cured fluoroelastomer coatings containing carbon black possess superior acid, water and fuel resistance. Efforts to increase the moderate aluminum adhesion were unsuccessful. A surface coating composed of PR-1057PR-1560-M Part Acellosolve acetate in a 5.52.02.5 weight ratio was formally tested under the conditions of specification MIL-C- 27725A USAF. All requirements of the specification applicable to a one-package system were passed. The formulation applies easily to clean and dry MIL-C-5541 aluminum surfaces by fill and drain, brush or spray techniques.
- Organic Chemistry
- Coatings, Colorants and Finishes