Polyurethane foams containing high levels of silicone-containing surfactant polymer to improve flame retardance and aged K-factors
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United States of America Patent
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Nov 11, 1997
Grant Date -
N/A
app pub date -
Oct 27, 1995
filing date -
Oct 27, 1995
priority date (Note) -
Expired
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Abstract
There is now provided a closed cell rigid polyurethane foam made from a polyol composition containing a polyol having polyester linkages and a number average molecular weight of 400 or more, and at least about 8 php of a silicone-containing surfactant polymer. Either mixed into the polyol composition at the time of foaming, mixed into an isocyanate, or both, is an aliphatic or cycloaliphatic C.sub.4 -C.sub.7 hydrocarbon.
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