The present invention relates to polyphosphate ester morpholides, compositions
comprising mixtures thereof and thermoplastic resin compositions containing the
polyphosphate ester morpholide composition as a flame retardant. The flame retardant
compositions comprise mixtures of polyphosphate ester morpholides which are represented
by the following general formula I:
##STR1##
in which X is 1 or 2; R1 is a C6-C20 aryl group,
an alkyl substituted C6-C20 aryl group or a derivative thereof;
R2 is a C6-C30 arylene group, an alkyl substituted
C6-C30 arylene group or a derivative thereof; n is the average
number of morpholide repeating units, m is the average number of R1 repeating
units, and n+m is 1 to 5. In accordance with the present invention, it is possible
to provide a flame retardant thermoplastic resin compositions having improved flame
retardancy even when small amounts of the flame retardant are used. The thermoplastic
compositions according to the present invention also have a desirable balance of
properties such as workability, impact strength, heat resistance, appearance and
the like.
