Patent ID: 8796388

Claim:
A flame retardant composition comprising a brominated polymer distribution having a brominated monoadduct content, where said brominated monoadduct content does not exceed about 25 GPC area %, wherein the composition: (i) contains above 72 wt % bromine; and (ii) contains less than about 1,000 ppm (weight/weight) thermally labile Br as determined by the Thermally Labile Bromine Test, the wt % and ppm values being based upon the total weight of the composition, wherein said polymer distribution is an anionic, chain transfer, vinyl aromatic polymer (ACTVAP) distribution having a chain length distribution of individual polymer constituents prior to bromination having the general formula: Ar—CRH[—CH 2 CH(Ar)]n-CH 2 CH 2 —Ar, wherein Ar is a phenyl group, R is a C 1 -C 4 alkyl group or hydrogen and n is the number of repeating monomer units; wherein each phenyl group in the brominated polymer distribution contains from about 2 to about 5 bromine substituents per phenyl group on an individual, not average, basis, wherein the brominated ACTVAP distribution comprises at least about 97 wt % of the total weight of the flame retardant composition, with the remainder being by-product impurities, wherein the T g value of the brominated composition is within the range of from about 35° C. to about 165° C.; and wherein the composition GPC M w is in the range of from about 1250 to about 14,000 Daltons, and GPC M n is in the range of from about 1070 to about 8,200 Daltons and a PD less than about 2.2.