Flame-retardant polyurea polyol and preparation method thereof

The invention relates to a flame-retardant polyurea polyol and a preparation method thereof. The flame-retardant polyuria polyol comprises the following raw materials: polyamine, polyester polyols, a dispersing agent and isocyanate in weight part ratio of 1 to 17-19 to 1.5-1.8 to 3-4. The flame-retardant polyurea polyol has the characteristics of being good in flame retardance property, high in foam hardness and the like; the residual acrylonitrile and styrene in polymerization reaction of the prior art can be avoided, and the odor is small; and the flame-retardant polyurea polyol has the characteristics of diluting flammable gas and reducing the smoking quantity with regard to combustion surfaces. 本发明涉及种阻燃聚脲多元醇及其制备方法，包含以下重量份数的原料：多元胺：聚醚多元醇：分散剂：异氰酸酯＝1:17-19:1.5-1.8:3-4。本发明具有阻燃性好、泡沫硬度高等特点；避免了现有技术聚合反应残留的丙烯腈、苯乙烯，气味小；本发明对于燃烧表面具有稀释可燃气体、减少发烟量的特点。