The present invention relates to cyclic phosphazenes of general formula (1)
wherein Q is a halogen and/or an aryloxy group, and m is an integer of 3 to 10, which are characterized by being substantially free from linear phosphazenes of general formula (2)
wherein Q is a halogen and/or an aryloxy group, and n is an integer of 1 to 20 and by having an extremely low content of halogen, and which are appropriate to flame retardants for resins; processes for preparing the same; flame retardants containing the same as an active ingredient; resin compositions containing the cyclic phosphazenes; and molded articles therefrom.
本发明涉及通式(1)的环状膦氮化合物
其中 Q 为卤素和/或芳基氧基,m 为 3 至 10 的整数,其特征是基本上不含通式(2)的线性
磷氮烷
其中 Q 为卤素和/或芳基氧基,n 为 1 至 20 的整数,卤素含量极低,适用于
树脂阻燃剂;制备方法;含有相同活性成分的阻燃剂;含有环状膦烯的
树脂组合物;以及由其制成的成型制品。