NASA NTRS · 19780016347
Sprayable low density ablator and application process
Abstract
A sprayable, low density ablative composition is described consisting esentially of: (1) 100 parts by weight of a mixture of 25-65% by weight of phenolic microballoons, 0-20% by weight of glass microballoons, 4-10% by weight of glass fibers, 25-45% by weight of an epoxy-modified polyurethane resin, 2-4% by weight of a bentonite dispersing aid, and 1-2% by weight of an alcohol activator for the bentonite; (2) 1-10 parts by weight of an aromatic amine curing agent; and (3) 200-400 parts by weight of a solvent.
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Sharpe, M. H., Hill, W. E., Simpson, W. G., Carter, J. M., Brown, E. L., King, H. M., Schuerer, P. H., Webb, D. D.. 1978-03-07. Sprayable low density ablator and application process. https://ntrs.nasa.gov/citations/19780016347
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