Flame resistant polymer composition containing phosphorus and bromine containing polymer

Claim 1

A flame resistant composition comprising an inflammable organic polymer selected from the group consisting of polyesters, polyurethanes, polyamides, acrylic polymers, polyolefins and cellulose, said polymer having blended therein from 3 to 30 percent by weight, based on the weight of said inflammable polymer, of a second polymer having the formula ##STR30## wherein R 1 , A, Z, Y, l, p and q have the same meanings as defined hereinafter and n is 3 to 40, obtained by reacting, in the liquid phase, at least one bromine-containing compound having the formula (I) h(or.sub.1).sub.p OAO(R.sub.1 O).sub.q H (I) wherein R 1 is alkylene having 2 or 3 carbon atoms, p and q are integers of at least 1 and the sum of p and q is an integer of not more than 4 and A is ##STR31## wherein m is an integer of one to 4 and B is alkylene or alkylidene having one to 6 carbon atoms or sulfone, with at least one phosphorus halide compound having the formula (II) ##STR32## wherein Z is --R 2 or --OR 2 , R 2 is alkyl or aryl, X is chlorine or bromine, Y is sulfur or oxygen and l is zero or 1, wherein the molar ratio of the formula (I) compound:formula (II) compound is 1.0:0.9 to 1.5 and wherein the reaction temperature is from zero to 180° C.