This invention has an object of providing a flame retardant which advantageously has a high melting point and a low volatility and is unlikely to depress the inherent properties of resins. The flame retardant of the invention is a phosphazene compound crosslinked with a crosslinking group such as phenylene group, each of the crosslinking groups being interposed between the two oxygen groups left after the elimination of phenyl groups from the phosphazene compound, the amount of the phenyl groups in the crosslinked compound being 50 to 99.9% based on the total number of the phenyl groups in the phosphazene compound. The invention also provides a resin composition containing the flame retardant, and a molded article of the resin.
本发明的目的是提供一种阻燃剂,这种阻燃剂具有熔点高、挥发性低的优点,而且不太可能降低
树脂的固有特性。本发明的阻燃剂是一种与交联基团(如亚苯基)交联的
磷氮化合物,每个交联基团都插在
磷氮化合物中的苯基消除后留下的两个氧基团之间,交联化合物中苯基的数量为
磷氮化合物中苯基总数的 50%至 99.9%。本发明还提供了一种含有阻燃剂的
树脂组合物,以及由该
树脂制成的模塑制品。