The present invention discloses an active-hydrogen-containing phosphorus
compound for cross-linking a resin and for imparting flame-retardancy to
the cured resin, and in particular to a cured frame-retardant epoxy resin
prepared by reacting the hardener with a di- or poly-functional epoxy
resin via an addition reaction between the active hydrogen and the epoxide
group. The present invention also discloses an epoxy resin made from the
active-hydrogen-containing phosphorus compound and epihalohydrin.
