The coating prepared by the water-based infrared-laser composite stealth coating has low infrared emissivity and low laser reflectance, and has good infrared stealth and laser stealth properties. Coating on the target carrier can make the target have the ability of infrared and laser composite stealth, and achieve the purpose of infrared-laser composite stealth.
The water-based infrared-laser composite stealth coating with this formula has broad application prospects and is of great significance to national defense construction.
The preparation steps of waterborne infrared-laser composite stealth coating are as follows:
(1) Preparation of adhesive Take 5g of polycarbonate diol, put it into a vacuum Drying Oven, dehydrate it in vacuum for 1 hour at a temperature of 130°C and a pressure of 0.1MPa, and then transfer it to a vacuum oven equipped with a mechanical stirrer, a thermometer, and nitrogen gas inlet. Put it into the Oil Bath, adjust the temperature of the Oil Bath to 85°C, add 2g of isophorone diisocyanate, stir and mix for 1h; add 0.42g of dimethylolpropionic acid to react for 1.5h; Reduce the temperature of the Oil Bath to 65°C, add 30ml of acetone, adjust the viscosity, react for 2h, reduce the temperature of the Oil Bath to 65°C, add 0.1g of trimethylolpropane dissolved in 30ml of acetone, react for 1h, reduce the temperature of the Oil Bath to Room temperature; add 0.31g of salt-forming agent triethylamine, react for 1h, pour into other container; under the condition of rotating speed 2000 r·min-1, add 30ml of distilled water while stirring, emulsify for 0.5h, then add dropwise 0.1g of capping agent Diethanolamine was reacted for 0.5 h at a rotational speed of 1000 r min-1 to obtain a white emulsion with bluish light; the solvent acetone was removed by distillation at room temperature for 1 h to obtain an adhesive for composite stealth paint;
(2) Preparation of filler Mix 1g of flake aluminum powder, 0.05g of sodium hexametaphosphate and 30ml of absolute ethanol, ultrasonically disperse, ultrasonic power 250W, disperse for 30 min to obtain a dispersion; dissolve the dispersion in 30ml of anhydrous Mix 5 g of chromium chloride hexahydrate in ethanol solution, slowly add 25 ml of ammonia solution with a mass fraction of 14% dropwise at a stirring speed of 500 r min-1, finish adding dropwise in 1.5 h, react at a constant temperature of 40 °C for 3 h, cool to room temperature, Suction filtration to obtain the precursor of blocky chromium trioxide-coated flake-shaped aluminum composite particles; vacuum drying at a temperature of 100°C for 12 hours; put the dried precursor into a muffle furnace for calcination at a temperature of 400°C 3 h, cooled to room temperature, and ground to obtain dark green chromium trioxide-coated flake-shaped aluminum composite particle powder, which was passed through a 200-mesh sieve; filler was obtained;
(3) Preparation of water-based infrared-laser composite stealth coating Mix 0.5-3.0g of chromium trioxide-coated flake-shaped aluminum composite particle powder, 0.05-0.15g of dispersant and 50ml of water, and use a high-speed disperser at a speed of 5000 r Disperse for 30 minutes under the condition of min‑1, let it stand until clear, then remove the upper layer of water, then add 11.4g of adhesive, 0.06g of leveling agent, 0.03g of defoamer and 0.0025g of anti-aging agent, mix well , grinding, the fineness reaches 80μm; add 0~0.1g thickener to adjust the viscosity, and filter to get the infrared-laser composite stealth coating;
The dispersant in the preparation process is sodium hexametaphosphate; the antiaging agent is antiaging agent emulsion SD‑1688; the leveling agent is HP‑855 polyether modified polyorganosiloxane; the defoaming agent is CP‑02 silane effectively Foaming agent; Thickening agent is sodium carboxymethyl cellulose.
