▎ 摘　　要

NOVELTY - Anti-explosion shock wave polyurea composite material of modified graphene comprises component A, component B and component C in the ratio of (6-15):2:(0-0.75). The component A comprise diisocyanate and polycarbonate diol. The component B is amine chain extender. The component C is isocyanatized modified graphene. USE - The anti-explosion shock wave polyurea composite material of modified graphene is useful in preparation of protective appliance for explosion-proof impact wave (claimed). ADVANTAGE - The anti-explosion shock wave polyurea composite material: has higher anti-impact strength and toughness. The composite material can not only maintain the traditional polyurea mechanical performance, improve the impact resistance, but also can solve the graphene of bad dispersibility in the matrix material, expands the application field of the polyurea product. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing anti-explosion shock wave polyurea composite material of modified graphene comprising (1) taking polycarbonate diol, adding to the container, heating up to 100-120°C, dehydrating under high vacuum for 1-2 hours, until the water content is lower than 50 ppm, and cooling to 40-60°C, releasing the vacuum, adding diisocyanate and butyl tin laurate catalyst, the reaction heat makes the system heat up naturally, after the natural temperature rise of the system stops, slowly heating up to 80-85°C, reacting for 2-3 hours, measuring the residual NCO content, and dropping to the end of the reaction to room temperature, stopping the reaction, vacuumizing and defoaming, filling with dry nitrogen and seal to obtain component A, (2) taking graphene, diisocyanate and N,N-dimethylformamide (DMF), mixing them, and dispersing ultrasonically for 30 minutes to obtain a mixed solution C1, (b) reacting the mixed solution fully at 80°C for 24 hours, cooling to room temperature, and centrifuging to obtain the product C1, (c) washing the product C1 three times with ether to obtain the product C2, (d) drying the product C2 in vacuum at 60°C for 12 hours to obtain the C component, and (3) taking components A, B, and C, preheating in vacuum at 70°C for 1 hour, and vacuumizing for 10 minutes to defoam, and pouring in components B and C, stirring and mixing, stirring speed is 800-1000 revolutions per minute , and the stirring time 3-5 minutes, stirring evenly, casting and forming, and demolding after natural drying for 24 hours to obtain a graphene-reinforced modified polyurea composite material.