According to the chemical reactivity of the flame retardants in polyurethane, polyurethane flame re-tardants can be divided into three classes: non-reactive flame retardants, reactive flame retardants and nanomaterials flame retardants. The present research progress which based on these three categories is summarized. The flame re-tardant mechanism is briefly introduced, and the the future development trends of the flame-retardant polyurethane are described.%根据阻燃剂在聚氨酯中的化学反应性,可以将聚氨酯的阻燃剂分为非反应型阻燃剂、反应型阻燃剂和纳米材料阻燃剂三大类.并根据这三大类分别综述了阻燃聚氨酯的研究现状,简要介绍了各类阻燃剂的阻燃机理,阐述了其使用过程中存在的优缺点,并展望了阻燃聚氨酯的发展趋势.
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