Removable foams based on an epoxy resin incorporating reversible Diels-Alder adducts

We have successfully incorporated Diels–Alder reversible chemistry into epoxy resins. The Diels–Alder chemistry goes in the forward direction at 60 °C and reverses at or above 90 °C. One resin was formulated with other commercial ingredients into foamed epoxy. The foam, shown to have mechanical prop...

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Bibliographic Details
Published in:Journal of applied polymer science 2002-08, Vol.85 (7), p.1496-1502
Main Authors: Mcelhanon, James R., Russick, Edward M., Wheeler, David R., Loy, Douglas A., Aubert, James H.
Format: Article
Language:English
Subjects:
Applied sciences
blowing agents
Cellular
Diels-Alder polymers
Exact sciences and technology
Forms of application and semi-finished materials
Polymer industry, paints, wood
resins
Technology of polymers
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Summary:We have successfully incorporated Diels–Alder reversible chemistry into epoxy resins. The Diels–Alder chemistry goes in the forward direction at 60 °C and reverses at or above 90 °C. One resin was formulated with other commercial ingredients into foamed epoxy. The foam, shown to have mechanical properties similar to foams formed with conventional epoxy resins, is being utilized for electronic encapsulation. Because of the built‐in reversible chemistry, the foams can be easily removed by dissolution in 1‐butanol at 90 °C. Removal allows for the rework, upgrading, or dismantlement of the electronic components. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 85: 1496–1502, 2002
ISSN:0021-8995
1097-4628
DOI:10.1002/app.10753