BL-environmental friendly flame retardant belongs to N-P flame retardant series, and its main raw materials are phosphoric acid and urea the same as ammonium polyphosphate (APP).

• BL-环保阻燃剂属于N-P系阻燃剂,其主要原料与聚磷酸铵一样是磷酸与尿素,但因为其特殊的合成工艺使它不同于普通的聚磷酸铵。