Hydrotalcite-attapulgite composite contained coating and preparation method thereof
A technology of attapulgite and hydrotalcite, applied in polyester coatings, reflective/signal coatings, coatings, etc., can solve problems affecting performance and life, prone to bubbling of coating films, and unsatisfactory heat insulation effects, etc., to achieve Improve compatibility, improve thermal insulation performance, and improve flatness
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preparation example 1
[0050] Preparation of organosilicon-modified intercalated hydrotalcite-attapulgite composite:
[0051] 1) Weigh 60.0g of acrylic acid and dissolve it in deionized water, adjust the pH with 6mol / L sodium hydroxide to make an acrylic acid solution with pH=5, weigh 50g of hydrotalcite and roast at 400°C for 1h, add the above organic acid after cooling Then add 17.6g of methyltrimethoxysilane into the solution, stir evenly, dynamically crystallize at 60°C for 20h, and cool to 60°C to obtain a silicone-modified intercalated hydrotalcite slurry.
[0052] 2) Weigh 50 g of attapulgite and add it to deionized water, then add 3.0 g of methyltrimethoxysilane, stir evenly, and reflux and stir at 60° C. for 3 hours to obtain a silicone-modified attapulgite slurry;
[0053] 3) Mix the silicone-modified intercalated hydrotalcite slurry obtained above with the silicone-modified attapulgite slurry, reflux and stir at 100° C. for 1 hour, then add 0.25 g of ammonium thiosulfate to the obtained s...
preparation example 2
[0055] Preparation of organosilicon-modified intercalated hydrotalcite-attapulgite composite:
[0056] 1) Weigh 86.5g of methacrylic acid and dissolve it in deionized water, adjust the pH with 6mol / L sodium hydroxide to make an acrylic acid solution with pH=7, weigh 175g of hydrotalcite and roast at 600°C for 4h, add the above-mentioned Then add 12.3g of tetraethoxysilane to the organic acid solution, stir evenly, dynamically crystallize at 150°C for 4h, cool to 50°C, and obtain the organosilicon-modified intercalation hydrotalcite slurry.
[0057] 2) Weigh 50 g of attapulgite and add it to deionized water, then add 3.0 g of tetraethoxysilane, stir evenly, and reflux at 100° C. for 1 hour to obtain a silicone-modified attapulgite slurry;
[0058] 3) Mix the silicone-modified intercalated hydrotalcite slurry and the silicone-modified attapulgite slurry obtained above, reflux and stir at 60° C. for 3 hours, then add 0.25 g of ammonium thiosulfate to the obtained slurry, stir, I...
preparation example 3
[0060] Preparation of organosilicon-modified intercalated hydrotalcite-attapulgite composite:
[0061] 1) Weigh 86.5g of methacrylic acid and dissolve it in deionized water, adjust the pH with 6mol / L sodium hydroxide to make an acrylic acid solution with pH=6, weigh 200g of hydrotalcite and roast at 500°C for 3h, add the above-mentioned Add 12.3 g of ethyltriethoxysilane to the organic acid solution, stir evenly, dynamically crystallize at 100° C. for 10 h, and cool to 50° C. to obtain a silicone-modified intercalated hydrotalcite slurry.
[0062] 2) Weigh 50 g of attapulgite and add it to deionized water, then add 3.0 g of vinyltrimethoxysilane, stir evenly, and reflux at 80° C. for 2 hours to obtain a silicone-modified attapulgite slurry;
[0063] 3) Mix the silicone-modified intercalated hydrotalcite slurry and the silicone-modified attapulgite slurry obtained above, reflux and stir at 80° C. for 2 hours, then add 0.25 g of ammonium thiosulfate to the resulting slurry, stir...
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