Preparation method of high-strength water-based strippable composite coating
A composite coating, high-strength technology, applied in the direction of coating, etc., can solve the problems of insufficient strength and fracture of the coating film, achieve good construction performance, improve flexibility and impact resistance, and improve efficiency
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Embodiment 1
[0028] In parts by weight, weigh 20 parts of silicon powder, 20 parts of sodium hydroxide solution with a mass fraction of 10%, and 80 parts of deionized water, add silicon powder to deionized water, place it in an ultrasonic disperser, and Ultrasonic dispersion with a power of 400W for 20 minutes to obtain a silicon powder dispersion, put the silicon powder dispersion in a water bath at 70°C and stir at a speed of 200r / min for 10 minutes to obtain a silicon powder activation solution, add sodium hydroxide solution to the silicon powder for activation solution, stirred at a speed of 600~800r / min for 8 hours in a water bath at 70°C, and cooled at room temperature to obtain alkaline silica sol;
[0029] Then weigh 60 parts of alkaline silica sol, 3 parts of vinyltriethoxysilane, and 30 parts of absolute ethanol in parts by weight, and add vinyltriethoxysilane to absolute ethanol. Stir at 240r / min for 20min in a water bath to obtain vinyltriethoxysilane ethanol solution, slowly add...
Embodiment 2
[0032] In parts by weight, weigh 25 parts of silicon powder, 25 parts of sodium hydroxide solution with a mass fraction of 10%, and 100 parts of deionized water, add silicon powder to deionized water, place it in an ultrasonic disperser, and Ultrasonic dispersion with a power of 450W for 25 minutes to obtain a silicon powder dispersion, put the silicon powder dispersion in a water bath at 80°C and stir at a speed of 225r / min for 15 minutes to obtain a silicon powder activation solution, add sodium hydroxide solution to the silicon powder for activation solution, stirred at 700r / min for 10h in a water bath at 80°C, and cooled at room temperature to obtain alkaline silica sol;
[0033] Then weigh 70 parts of alkaline silica sol, 3.5 parts of vinyltriethoxysilane, and 35 parts of absolute ethanol in parts by weight, and add vinyltriethoxysilane to absolute ethanol at 45 ° C. Stir at 260r / min for 25min in a water bath to obtain vinyltriethoxysilane ethanol solution, slowly add vin...
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