Thermal stability of polyurethane-modified polyisocyanurate foam
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United States of America Patent
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Issued Date -
Oct 1, 2009
app pub date -
Apr 1, 2008
filing date -
Apr 1, 2008
priority date (Note) -
Abandoned
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Abstract
A polyurethane-modified polyisocyanurate (PU-PIR) foam exhibiting improved thermal stability is provided. The foam has incorporated therein a high molecular weight ammonium polyphosphate (APP). APP is employed as a partial or complete substitute for flame retardants conventionally employed in PU-PIR foams. The foams of the invention exhibit excellent and improved thermal stability characteristics as compared to foams to which no APP has been added.
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