[Introduction]The structure design and polymerization conditions of waterborne acrylic polyurethane resin were studied to synthesize a fluorine-modified acrylic polyurethane emulsion with excellent performance.By using the emulsion as binder,a weather-resistant and flame-retardant waterborne acrylic polyurethane paint was prepared.[Method]The effects of the types of resin and curing agent,—NCO/—OH equivalent ratio,pigment-to-binder ratio,and flame retardant on the properties of the paint were discussed.[Result]The waterborne acrylic polyurethane paint prepared under the optimized conditions had excellent comprehensive performance,with a color difference of 1.2 after 1 000 hours of ultraviolent aging test,meeting the flame retardancy requirement of the airworthiness Standards for transport aircraft(CCAR-25).Its water resistance,oil resistance,impact resistance,and adhesion strength were at the level of traditional solvent-based paints.[Conclusion]The paint can be applied to aircraft interior painting.
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