How to configure an aqueous infrared - laser composite stealth coating?-Iota

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News > Dynamic industry > How to configure an aqueous infrared - laser composite stealth coating?

How to configure an aqueous infrared - laser composite stealth coating?

From the aqueous infrared - laser stealth coating compound obtained infrared low emissivity coating, laser reflectance is low, with good infrared stealth and laser stealth performance. Applied to the target carrier, we can target the ability of infrared and laser composite stealth, to infrared - laser composite stealth purposes.
The aqueous formulation IR - laser stealth coating compound has broad application prospects, are extremely important for national defense.
Aqueous IR - laser composite stealthy coating preparation steps are as follows:
Preparation of (1) to take 5g adhesive polycarbonate diol, placed in a vacuum oven, at a temperature of 130 ℃, under a pressure of 0.1MPa of vacuum dehydration 1h, then transferred into a reactor equipped with a mechanical stirrer, a thermometer, a nitrogen inlet mouth and reflux condenser container, placed in an oil bath pot, adjust the oil bath temperature to 85 ℃, added 2g isophorone diisocyanate, mixing 1h; dimethylolpropionic acid was added 0.42g reaction 1.5h; lowering the temperature of the oil bath to 65 ℃, 30ml of acetone was added to adjust the viscosity, reaction 2h, the temperature of the oil bath lowered to 65 ℃, dissolved in 30ml of acetone was added trimethylol propane 0. 1g, reaction 1h, the oil bath temperature to reduce the room temperature; salt-forming agent was added 0.31g of triethylamine, the reaction 1h, poured into other containers; speed at 2000 r · min-1 condition, 30ml distilled water was added with stirring, emulsified 0.5h, then added dropwise 0.1g capping agent diethanolamine, at speed 1000 r · min-1 reaction conditions 0.5 h, a white emulsion pan-blue light; 1h at room temperature to remove the solvent acetone was distilled to obtain a composite stealth coating binder;
(2) Preparation of the filler 1g aluminum flake, 0.05g of anhydrous sodium hexametaphosphate and 30ml of ethanol were mixed, ultrasonic dispersion, ultrasonic power 250W, dispersion 30 min, to obtain a dispersion; and the dispersion was dissolved in 30ml of anhydrous chromium chloride hexahydrate 5g mixed ethanol solution, stirring speed 500r · min-1 slowly dropped 25ml mass fraction of 14% ammonia solution, 1.5h dropping finished, temperature 40 ℃ reaction 3h, cooled to room temperature, suction filtration to give the bulk of the chromium oxide-coated aluminum flake precursor composite particles; and dried under vacuum at a temperature of 100 ℃ dried 12h; the dried precursor placed in a muffle furnace, calcining temperature 400 ℃ 3 h, cooled to room temperature, and pulverized to obtain a dark green chromium oxide composite particle powder-coated aluminum flake, over 200 mesh sieve; get filler;
(3) Aqueous IR - Preparation of Compound laser stealth coatings will be 0.5 ~ 3.0g chromium oxide-coated aluminum flake composite particle powder, 0.05 ~ 0.15g dispersant and 50ml of water were mixed, using a high speed disperser, the rotational speed of 5000 r · min-1 under conditions of decentralized 30min, stand to clarify, and then remove the upper layer of water, then add to 11.4g adhesive, 0.06g leveling agent, 0.03g defoamers and anti-aging agent mixing 0.0025g, stir , grinding fineness 80μm; 0 ~ 0.1g thickener added to adjust the viscosity, filter, you can get the infrared - laser composite stealth coating;
During the preparation of the dispersant is sodium hexametaphosphate; anti-aging agent is an antioxidant emulsion SD-1688; leveling agent for the HP-855 polyether modified polysiloxane; defoamers for the CP-02 silane and efficient elimination foaming agent; thickening agent is sodium carboxymethylcellulose.

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