Nano-composite PU (polyurethane) aircraft coating and preparation method thereof
A nano-composite, aerospace coating technology, applied in polyurea/polyurethane coatings, anti-corrosion coatings, coatings, etc., can solve human health and environmental hazards, harmful, toxic and other problems, and achieve high antifouling and high UV resistance , High surface self-cleaning effect
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Embodiment 1
[0072] 1. Preparation of nano-pulp
[0073] According to the weight ratio of nano-titanium dioxide, nano-silica, and water as 15:45:40, add nano-titanium dioxide and nano-silica to deionized water for ultrasonic dispersion (temperature T=40°C) for 20 minutes; The silane coupling agent of 3% of the total weight of the particles, the polyacrylamide dispersant accounting for 4% of the total weight of the above-mentioned nanoparticles, and the water-based polyurethane resin accounting for 6% of the total weight of the above-mentioned nanoparticles were dispersed by ultrasonic (T=55° C.) for 1 h; Finally in 2×10 4 Centrifuge 3 times at rpm for 1 hour each time to prepare nano-slurry.
[0074] 2. Preparation of polyaniline modified mica iron oxide
[0075] (a) Prepare a mixed aqueous solution of phosphoric acid and phytic acid: wherein the phosphoric acid is 1.5 mol / liter; the phytic acid is 0.5 mol / liter.
[0076] (b) Add aniline to the mixed aqueous solution of phosphoric acid ...
Embodiment 2
[0085] 1. Preparation of nano-pulp
[0086] According to the weight ratio of nano-titanium dioxide, nano-silica, and water as 10:50:40, add nano-titanium dioxide and nano-silica to deionized water for ultrasonic dispersion (temperature T=30°C) for 30 minutes; then add the above-mentioned nanometer The silane coupling agent of 2% of the total weight of the particles, the polyacrylamide dispersant accounting for 5% of the total weight of the above-mentioned nanoparticles, and the water-based polyurethane resin accounting for 8% of the total weight of the above-mentioned nanoparticles were dispersed by ultrasonic (T=50° C.) for 2 hours; Finally at 1×104 Centrifuge twice at rpm for 2 hours each time to prepare nano-slurry.
[0087] 2. Preparation of polyaniline modified mica iron oxide
[0088] (a) Prepare a mixed aqueous solution of phosphoric acid and phytic acid: wherein phosphoric acid is 0.5 mol / liter; phytic acid is 0.1 mol / liter.
[0089] (b) Add aniline to the mixed aque...
Embodiment 3
[0098] 1. Preparation of nano-pulp
[0099] According to the weight ratio of nano-titanium dioxide, nano-silica, and water as 20:45:35, add nano-titanium dioxide and nano-silica to deionized water for ultrasonic dispersion (temperature T=35°C) for 25 minutes; then add the above-mentioned nanometer The silane coupling agent of 4% of the total weight of the particles, the polyacrylamide dispersant of 3% of the total weight of the above-mentioned nanoparticles and the water-based polyurethane resin of 5% of the total weight of the above-mentioned nanoparticles were dispersed by ultrasonic (T=60°C) for 1.5h ;finally at 3×10 4 Centrifuge 3 times at rpm for 0.5 h each time to prepare nanoslurry.
[0100] 2. Preparation of polyaniline modified glass flakes
[0101] (a) Prepare a mixed aqueous solution of phosphoric acid and phytic acid: wherein the phosphoric acid is 1.2 mol / liter; the phytic acid is 0.6 mol / liter.
[0102] (b) Add aniline to the mixed aqueous solution of phosphor...
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