Importance

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Abstract

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; R.sub.1 is a C.sub.6 -C.sub.20 aryl group, an alkyl substituted C.sub.6 -C.sub.20 aryl group or a derivative thereof; R.sub.2 is a C.sub.6 -C.sub.30 arylene group, an alkyl substituted C.sub.6 -C.sub.30 arylene group or a derivative thereof; n is the average number of morpholide repeating units, m is the average number of R.sub.1 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.

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First Claim