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|Title:||Panel and method for the preparation thereof|
|Abstract:||Composite foam panels are prepared from expanded thermoplastic particles of low density by generally encapsulating the particles in a phenolic foam matrix and providing a particulate expanded mineral substance such as perlite disposed generally adjacent the major surfaces of the panel.|
|Inventor(s):||Fultz; Duane A. (Westeville, OH)|
|Assignee:||The Dow Chemical Company (Midland, MI)|
1. A composite synthetic resinous foam panel, the foam panel having at least first and second generally opposed major surfaces, the resinous panel comprising a plurality of
expanded multicellular synthetic resinous thermoplastic particles, the particles having a density of from about one-half to two pounds per cubic foot, the synthetic resinous thermoplastic particles being generally encapsulated within a matrix of a resole
resin foam, the resole resin foam having a bulk density in the interstitial spaces between the synthetic resinous particles of from about two to six pounds per cubic foot, an expanded glass in particulate form encapsulated within portions of the resole
resin foam disposed adjacent the major surfaces of the panel.
2. The panel of claim 1 wherein the expanded synthetic resinous thermoplastic particles are styrene polymer.
3. The panel of claim 1 wherein the expanded glass is perlite.
4. The panel of claim 1 wherein an aluminum sheet is disposed on and adhered to at least one major surface thereof.
5. The panel of claim 1 wherein the synthetic resinous thermoplastic particles have the size of from about 1/16 of an inch to 3/8 of an inch.
6. The panel of claim 1 wherein the expanded synthetic resinous thermoplastic particles are styrene polymer, the expanded glass is perlite and the styrene polymer particles have an average diameter of from about 1/16 of an inch to 3/8 of an inch.
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