FLAME RETARDANT WATER-SOLUBLE POLYURETHANE RESIN AND PREPARATION METHOD THEREOF

摘要

The present invention relates to a flame retardant water-soluble polyurethane resin. More specifically, the present invention relates to a flame retardant water-soluble polyurethane resin containing phosphorus which is prepared by the steps of: preparing a halogen-free prepolymer by the reaction of a halogen-free diol or triol compound containing phosphorus, optionally a polyester diol compound, and a diisocyanate compound; and introducing a hydrophilic group to the prepolymer to neutralize the prepolymer introduced with the hydrophilic group and disperse it in water, followed by chain-extending it with a chain extender.