| abstract |
The invention discloses an intrinsic flame-retardant waterborne polyurethane which is polymerized by isocyanate, polyalcohol, a dihydroxyl high phosphorus nitrogen content flame-retardant functional monomer and a hydrophilic chain extender; the dihydroxyl high phosphorus-nitrogen content flame-retardant functional monomer is prepared by further reacting a phosphorus-nitrogen integrated functional compound prepared by taking glycine, paraformaldehyde and dimethyl phosphite as raw materials with a diepoxy compound. The intrinsic flame-retardant waterborne polyurethane can be used as a flame-retardant additive by adjusting and improving the proportion of the flame-retardant section, has high flame-retardant efficiency and lasting effect, and does not have the problems of volatility, migration, precipitation and the like. |