Mixture of mono-, bis- and tris-(hydroxyaryl) phosphine oxides useful to make polyglycidyl ethers or in epoxy compositions
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United States of America Patent
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May 11, 2004
Grant Date -
Nov 14, 2002
app pub date -
Feb 14, 2002
filing date -
Feb 15, 2001
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Abstract
A mixture of hydroxyarylphosphine oxides comprising (a) a mono(hydroxyaryl)phosphine oxide, (b) a bis(hydroxyaryl)phosphine oxide, (c) a tris(hydroxyaryl)phosphine oxide, and, optionally (d) a tri- aryl, alkyl or aralkyl-substituted phosphine oxide is useful in the preparation of polyglycidyl ethers derived therefrom, or is employed as flame retardants in epoxy resin compositions which can be processed into resin-impregnated composites.
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