| 主权项 |
1. A thermoset polyurethane foam comprising a brominated polymer, wherein the brominated polymer has copolymerized 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 zero 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 50 percent based on non-aromatic double bond content of the polymer prior to bromination as determined by proton nuclear magnetic resonance spectroscopy and a five percent weight loss temperature, as determined by dynamic thermogravimetric analysis of at least 170 degrees Celsius, wherein the thermoset polyurethane foam exhibits an extinguish time less than or equal to 2.9 seconds in accordance with ASTM D3104-04a. |
