Fire retardant compositions
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United States of America Patent
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Oct 10, 2000
Grant Date -
N/A
app pub date -
Jul 13, 1992
filing date -
Oct 11, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention provides a fire retardant composition comprising a dispersion of a solid fire retardant such as melamine, ammonium polyphosphate or guanidine carbonate in a liquid organic polyisocyanate which contains dispersed polymer particles. The preferred content of solid fire retardant is from 10 to 100% by weight and the preferred content of polymer particles is from 2 to 30% by weight. The compositions of the invention are suitable for the preparation of flexible and rigid polyurethane foams.
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