Development of nonflammable adhesives Final technical report, 17 Sep. 1968 - 20 Jan. 1970
Development of nonflammable fluorinated polyurethane adhesives for spacecraft systems
Fitzgerald, W. P., Jr.↗
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Thin conformal coatings, a boon to the electronic engineer
Thin film polyurethane coatings for printed circuitry
Fisher, J. M., Jr.↗
Reaction of encapsulating foams to specific environmental conditions
Encapsulating polyurethane foam reactions to specific environmental conditions
Walker, H. M.↗
Temperature-dependence of the diffusion constants of rigid, closed-cell foams
Temperature dependence of diffusion coefficient for carbon dioxide filled rigid polyurethane foam, using Fick law
Cuddihy, E. F.↗
Role of scanning electron microscopy in the study of solid propellant combustion. III - The surface structure and profile characteristics of burning composite solid propellants
Composite solid propellants surface structure and profile characteristics burning with various oxidizers and polyurethane binder by scanning electron microscopy
Boggs, T. L.↗
An analytical model for determining the thermal conductivity of closed-cell foam insulation
Closed cell polyurethane foam for cryogenic insulation, determining thermal conductivity and net heat flow by analytical model and test
Hammond, M. B., Jr.↗
Synthesis of a new class of highly fluorinated aliphatic diisocyanates
Synthesis is basis for preparation of polyurethanes that are compatible with liquid oxygen. The two step process preparation from fluorocarbon diacid fluorides is explained in text.
Warner, D. A.↗
Nondestructive testing of bond integrity in foam insulation/aluminum composites
Nondestructive test methods are used for evaluating bond integrity of low-density polyurethane spray-on foam used as cryogenic insulation on aluminum alloy surfaces.
Bankston, B. F.↗
Lightweight modular multilayer insulation Final report
Self evacuating multilayer insulation system of aluminized Mylar and polyurethane foam for liquid hydrogen tanks
Nies, G. E.↗
Hydroxy terminated perfluoro ethers Patent
Chemical synthesis of hydroxy terminated perfluoro ethers as intermediates for highly fluorinated polyurethane resins
Rochow, S. E.↗
An investigation of the flame spreading characteristics of the ICRPG standard reference composite propellant and its constituents, part 1
Surface flame spreading characteristics of ICRPG reference composite propellant composed of ammonium perchlorate with polyurethane binder
Pope, K. S.↗
Development of cryogenic adhesives with plus 150 C capability
Polyurethane structural adhesives with excellent tensile shear and T-peel strengths at cryogenic temperatures, long pot lives and good processing characteristics
Glasgow, D. G.↗
High strength, medium density molded foam
Toluene diisocyanate-based polyurethane produces molded-to-size foam products. Formulation techniques optimize dimension stability, strength and moldability.
Fender, J. R.↗
Adhesive for aluminum withstands cryogenic temperatures
Polyurethane adhesive mixed to various proportions with milled glass fibers match the thermal characteristics of 2014-T6 aluminum at cryogenic temperatures.
Hill, W. L.↗
New type of trifunctional alcohol
New type of trifunctional alcohol was synthesized from commercially available trimer acid. Trifunctional alcohol is hydrocarbon with widely separated terminal hydroxyl groups, and was expressly developed as crosslinking agent for preparation of polyurethane propellants, binders and case liners.
Marsh, H. E., Jr.↗
The performance of lightweight plastic foams developed for fire safety
The use of a low density, polyurethane based foam to suppress a fire and to provide protection for the structure of an aircraft or spacecraft is discussed. The mechanism by which foams provide protection from heat and create a nonflammable surface is described. Various materials and their application to specific types of structures are examined.
Fish, R. H.↗
Materials for foam type insulation
An internal foam fabrication is one of the concepts being considered for cryogenic insulation on the hydrogen tanks of the shuttle vehicle. The three-dimensional polyurethane used on the S-4 B tanks failed to meet the higher temperature requirements of the shuttle vehicle, however, and other foams under consideration include polyisocyanurates, polyphenylene oxides, polyimides, and polybenzimidazoles. Improved adhesive systems for attaching the foams to the interior tank wall are under study.
Hill, W. E.↗
Development of a flameproof elastic elastomeric fiber
Various flexible polyurethane structures containing halogen were synthesized from polyesters derived from aliphatic or aromatic polyols and dibasic acids. Aliphatic halide structures could not be used because they are unstable at the required reaction temperatures, giving of hydrogen halide which hydrolyzes the ester linkages. In contract, halogen-containing aromatic polyols were stable and satisfactory products were made. The most promising composition, a brominated neopentyl glycol capped with toluene disocyanate, was used as a conventional diisocyanate, in conjunction with hydroxy-terminated polyethers or polyesters to form elastomeric urethanes containing about 10% bromine with weight. Products made in this manner will not burn in air, have an oxygen index value of about 25, and have tensile strength values of about 5,000 psi at 450% elongation. The most efficient additives for imparting flame retardancy to Spandex urethanes are aromatic halides and the most effective of these are the bromide compounds. Various levels of flame retardancy have been achieved depending on the levels of additives used.
Howarth, J. T.↗