Compound flame retardant and application of compound flame retardant as low-thermal-conductivity ablation type flame-retardant thermal-insulation material

The invention discloses a low-thermal-conductivity ablation type polyurethane flame-retardant heat-insulating layer and a preparation method thereof, and according to the low-thermal-conductivity ablation type polyurethane flame-retardant heat-insulating layer, a proper amount of a flame retardant and an ablation aid are added into rigid polyurethane foam, and a foaming process is optimized and controlled to obtain the polyurethane flame-retardant heat-insulating layer with a flame-retardant characteristic. The material has the advantages of low heat conduction coefficient, high flame retardance, low thermal decomposition temperature and stable mechanical property. The problem of contradiction between flame retardance and ablation speed of an existing ablation type polyurethane thermal insulation material is solved, and the ablation type polyurethane thermal insulation material has potential commercial value. 本申请公开了一种低热传导性消融式聚氨酯阻燃隔热层及其制备方法，所述的低热传导性消融式聚氨酯阻燃隔热层，通过在聚氨酯硬泡中添加适量的阻燃剂和助消融剂，优化控制发泡工艺得到具有阻燃特特性的聚氨酯阻燃隔热层。