Phosphate ester flame retardants from resorcinol-ketone reaction products
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United States of America Patent
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Apr 29, 2008
Grant Date -
Mar 23, 2006
app pub date -
Sep 21, 2005
filing date -
Sep 22, 2004
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Expired
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Abstract
Flavan-based and spirodichroman compound-based phosphate esters prepared by reacting flavans and spirodichroman compounds with phosphorus oxychloride, monophenyl dichlorophosphate, or diphenyl chlorophosphate compounds are described. The flavans and spirodichroman compounds can be synthesized by the reaction of resorcinol with aliphatic acetone. Such phosphate esters can be used as flame retardants.
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