Flame retardant composition

Claim 1

A flame-retardant, non-dripping composition comprising in admixture (A) an alkenylaromatic polymer; (B) a flame retardant additive in an amount of from about 10 to about 30 parts by weight per hundred parts resin, said flame retardant additive being either (i) a low molecular weight polymer of a carbonate of a halogenated dihydric phenol, said polymer containing from 2 to 10 repeating units of the formula ##STR4## wherein R 1 and R 2 are hydrogen, (lower) alkyl or phenyl, X 1 and X 2 are bromo or chloro and m and r are from 1 to 4, said polymer having low volatility when heated above about 200° C., and a softening point of less than about 300° C., or (ii) a combination of said polymer (i) and an inorganic or organic antimony-containing compound; and, (C) from 0.5 to about 5.0 weight percent based on the weight of the alkenylaromatic polymer of a diorganopolysiloxane polymer gum having a viscosity of from about 10,000,000 to about 100,000,000 centistokes and wherein the organo substituents therein are selected from the group consisting of alkyl, aryl and vinyl radicals and mixtures thereof.