Disclosed are branched polyphosphonates produced using a polycondensation process, that result in polyphosphonates having Tg of at least 100°C, and which can be further processed to have improved hydro lytic stability compared to other polyphosphonates. The method and polyphosphonate compositions may be made from readily available starting materials providing lower cost fire retardant materials. Also disclosed are polymer compositions that comprise these branched polyphosphonates and at least one other polymer, wherein the resulting polymer compositions exhibit flame retardant properties.
                            本发明公开了使用缩聚工艺生产的支化聚
膦酸盐,这种聚
膦酸盐的 Tg 至少为 100°C,与其他聚
膦酸盐相比,经进一步加工后可提高
水溶解稳定性。该方法和聚
膦酸盐组合物可以用现成的起始材料制成,从而提供成本更低的阻燃材料。此外,还公开了由这些支化聚
膦酸盐和至少一种其它聚合物组成的聚合物组合物,其中所得到的聚合物组合物具有阻燃特性。