Abstract: An oligomeric phosphate ester non-formaldehyde flame retardant containing hydroxyl was synthesized by DMMP and glycol, and its structure was charactered by IR、1H-NMR and 31P-NMR. After discussing the reaction conditions, we got the optimal synthesis process. The cotton fabric was finished by the flame retardant and the process was optimized by exploreing the amount of flame retardant and crosslinker and the curing time. TGA showed that the main pyrolysis temperature of cotton after being finished by flame retardant declined about 50℃, and the amount of residue doubled after being burned. It proved that the fabric was difficult to burn. SEM showed that when the cotton fabric without flame retardant finishing burned, its carbon layer collapsed. On the contrary, the flame retardant cotton kept the original fibroid conformation and had a good flame resistance. After 12 times of washing, the flame retardant cotton was still up to GB B2 and showed a good washing fastness.

Key words: DMMP, glycol, non-formaldehyde flane retardant, cotton fabric, crosslinker