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One-step microwave foaming and curingProcess that combines microwave foaming and curing of polyimide precursors in single step produces fire-resistant foam slabs of much larger volume than has previously been possible. By adding selected conductive fillers to powder precursors and by using high-power microwave oven, foam slabs with dimensions in excess of 61 by 61 by 7.6 cm are made. Typical foaming and curing and curing time is 35 minutes in microwave oven with additional 1 to 2 hour postcure in conventional oven.
Document ID
19800000420
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Gagliani, J.
(International Harvester Co.)
Lee, R.
(International Harvester Co.)
Sorathia, U. A. K.
(International Harvester Co.)
Wilcoxson, A. L.
(International Harvester Co.)
Date Acquired
August 10, 2013
Publication Date
January 1, 1981
Publication Information
Publication: NASA Tech Briefs
Volume: 5
Issue: 3
ISSN: 0145-319X
Subject Category
Fabrication Technology
Report/Patent Number
MSC-18707
Accession Number
80B10420
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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