Flame-retardant flexible polyurethane foam
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United States of America Patent
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Nov 15, 2011
Grant Date -
Nov 12, 2009
app pub date -
May 30, 2006
filing date -
May 27, 2005
priority date (Note) -
Expired
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Abstract
A flexible polyurethane foam-forming composition and the flexible polyurethane foam obtained therefrom contain, as flame-retardant additive, a halogen-free phosphonate compound which is substantially unreactive for isocyanate, contains at least about 5 weight percent phosphorus, has an acid value of about 2 mg KOH/g or less, a volatility as measured by thermogravimetric analysis not exceeding a 5.0 percent weight loss at a temperature of about 150° C., and a weight average molecular weight of from about 200 to about 2000.
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