▎ 摘　　要

NOVELTY - Phytic acid-melamine composite reactive flame-retardant modified polyurethane is prepared by (a) adding hydroxylated graphene and phytic acid to deionized water solvent, performing ultrasonic dispersion treatment, heating, filtering, washing and drying to prepare phytic modified graphene, (b) adding melamine to N,N-dimethylacetamide solvent, performing ultrasonic dispersion, dripping epichlorohydrin and catalyst potassium methoxide, heating, washing and drying to prepare melamine polyether polyol, (c) adding phytic modified graphene and melamine polyether polyol to deionized water solvent, adding catalyst urea, performing ultrasonic dispersion, heating, filtering, washing and drying to prepare melamine polyol-phytate modified graphene, and (d) adding isophorone diisocyanate and melamine polyol-phytate modified graphene into polyester diol, stirring and adding dibutyltin dilaurate, reacting, pouring into a mold for vacuum defoaming, drying and curing. USE - As phytic acid-melamine composite reactive flame-retardant modified polyurethane. ADVANTAGE - The flame-retardant modified polyurethane improves the interface compatibility, generates a large amount of non-combustible gases such as ammonia and nitrogen under high temperature combustion, and decomposes into a large amount of phosphoric acid derivatives. DETAILED DESCRIPTION - Phytic acid-melamine composite reactive flame-retardant modified polyurethane is prepared by (a) adding hydroxylated graphene and phytic acid to the deionized water solvent, placing in an ultrasonic treatment instrument for ultrasonic dispersion treatment, heating at 150-180 degrees C in a reaction kettle, reacting for 10-20 hours, filtering, washing and drying to prepare phytic modified graphene, (b) adding melamine to N,N-dimethylacetamide solvent, performing ultrasonic dispersion, placing the mixture in a reaction kettle, introducing nitrogen to maintain the pressure in the reaction kettle to be 0.2-0.5 MPa, dripping epichlorohydrin and catalyst potassium methoxide, heating to 150-170 degrees C, reacting for 3-8 hours, washing and drying to prepare melamine polyether polyol, (c) adding phytic modified graphene and melamine polyether polyol to deionized water solvent, adding catalyst urea, performing ultrasonic dispersion uniformly, heating at 90-120 degrees C, reacting for 12-24 hours, filtering, washing and drying to prepare melamine polyol-phytate modified graphene, and (d) adding isophorone diisocyanate and melamine polyol-phytate modified graphene to polyester diol, stirring and adding catalyst dibutyltin dilaurate, reacting at 75-85 degrees C for 4-6 hours, reducing the temperature to 40-50 degrees C, adding acetone solvent and triethylamine to adjust the pH to neutral, adding 1,4-butanediol, reacting for 1-2 hours, pouring into a mold for vacuum defoaming and drying and curing.