Mixture of mono-, bis- and tris-(hydroxyaryl) phosphine oxides useful to make polyglycidyl ethers or in epoxy compositions

摘要

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.