CROSSLINKED PHENOXYPHOSPHAZENE COMPOUNDS, PROCESS FOR THE PREPARATION THEREOF, FLAME RETARDANTS, FLAME-RETARDANT RESIN COMPOSITIONS, AND MOLDINGS OF FLAME-RETARDANT RESINS

摘要

THIS INVENTION PROVIDES A HALOGEN-FREE FLAME RETARDANT WHICH ADVANTAGEOUSLY HAS HIGH MELTING POINT AND ALOW VOLATILITY AND DOES NOT IMPAIR THE INHERENT PROPERTIES OF RESINS. THE FLAME RETARDANT OF THE INVENTION IS APHOSPHAZENE COMPOUND CROSSLINKED WITH A CROSSLINKING GROUP SUCH AS A PHENYLENE GROUP, WHEREIN EACH OF THE CROSSLINKING GROUPS IS INTERPOSED BETWEEN THE TWO OXYGEN GROUPS LEFT AFTER THE ELIMINATION OF PHENYL GROUPS FROM THE PHOSPHAZENE COMPOUND;THE CROSSLINKED PHENOXYPHOSPHAZENE COMPOUND DOES NOT HAVE ANY FREE HYDROXYL GROUPS ( DERIVED FROM CROSSLINKING GROUPS); AND THE AMOUNT OF THE PHENYL GROUPS IN THE CROSSLINKED COMPOUND IS 50 TO 99.9, BASED ON THE TOTAL NUMBER OF THE PHENYL GROUPS IN THE PHOSPHAZENE COMPOUND.