Patent ID: 7851558

Claim:
A thermally stable brominated copolymer, the copolymer having polymerized therein a butadiene moiety and a vinyl aromatic monomer moiety, the copolymer having, prior to bromination, a vinyl aromatic monomer content of from 5 to 90 percent by weight, based upon copolymer weight, a 1,2-butadiene isomer content of greater than 0 percent by weight, based upon butadiene moiety weight, and a weight average molecular weight of at least 1000, the brominated copolymer having an unbrominated, non-aromatic double bond content of less than or equal to 15 percent, based upon non-aromatic double bond content of the copolymer prior to bromination as determined by H 1 NMR spectroscopy and a five percent weight loss temperature, as determined by thermogravimetric analysis (TGA) of at least 200 degrees centigrade.