Process for the preparation of flame resistant polyurethane compositions
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United States of America Patent
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Sep 27, 1988
Grant Date -
N/A
app pub date -
Jan 20, 1988
filing date -
Jan 27, 1987
priority date (Note) -
Expired
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Abstract
Flame resistant foams and other compositions containing polyurethane and/or polyisocyanurate groups are prepared by reacting an organic polyisocyanate with a polyol in the presence of flame retardants, catalysts, blowing agents as well as optionally chain extenders, cross-linkers auxiliaries and additives. The flame retardents comprise a phenol or melamine formaldehyde condensate, pentaerythritol as well as ammonium phosphate and preferably in addition dicyandiamide.
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