Heat-insulating powder for coating and preparation method thereof
A technology of thermal insulation powder and coating, applied in reflective/signal coatings, chemical instruments and methods, polyurea/polyurethane coatings, etc. Excellent thermal insulation effect, good thermal insulation effect, enhanced thermal insulation effect
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Embodiment 1
[0029] 1) Select 1000g of titanium dioxide, 200g of vanadium pentoxide and 300g of rectorite powder with a particle size of 20-50nm, and mix them in a mixer for 1-3 hours to obtain a mixed nano-powder material;
[0030] 2) Select the sodium silicate (i.e. sodium silicate aqueous solution) with a Baume degree of 48-53 (containing sodium silicate 25-32wt%), add deionized water 5 times the weight of sodium silicate to dilute, and then Under high-speed stirring at 8000 rpm, add the mixed nano-powder material with a weight of 12% of the diluted natron, and stir for 10 to 30 minutes;
[0031] 3) Add hydrochloric acid dropwise (obtained by adding concentrated hydrochloric acid to 1 times the volume of water to dilute), the molar ratio of the hydrogen ion contained in the hydrochloric acid to the sodium silicate contained in the above-mentioned sodium silicate is 1: 1; Complete within 60 minutes, continue to stir for 30 minutes, then add hydrochloric acid dropwise to pH 7-7.2, and the...
Embodiment 2
[0036] 1) Select 1000g of titanium dioxide with a particle size of 20nm, 150g of vanadium pentoxide of 20nm, 50g of aluminum oxide of 40nm, and 400g of rectorite powder, and mix them in a mixer for 1 to 3 hours to obtain a mixed nano-powder material;
[0037] 2) Choose sodium silicate (i.e. sodium silicate aqueous solution) with a Baume degree of 42-50 (containing sodium silicate 20-29wt%), add deionized water 5 times the weight of sodium silicate to dilute, Under high-speed stirring at 6000 rev / min, add the mixed nano-powder material with 10% weight of diluted natron, and stir for 10 to 30 minutes;
[0038] 3) Add hydrochloric acid dropwise (obtained by adding 2 times the volume of water to dilute concentrated hydrochloric acid), the molar ratio of the hydrogen ion contained in the hydrochloric acid to the sodium silicate contained in the above-mentioned sodium silicate is 1: 1; Complete within 60 minutes, continue to stir for 30 minutes, then add hydrochloric acid dropwise t...
Embodiment 3
[0043] 1) Select 1000g of titanium dioxide, 150g of vanadium pentoxide, 50g of ferric oxide, and 400g of rectorite powder with a particle size below 50nm, and mix them in a mixer for 1 to 3 hours to obtain a mixed nano-powder material;
[0044] 2) Select the sodium silicate (aqueous solution of sodium silicate) with a Baume degree of 42-53 (containing sodium silicate 20-32wt%), add deionized water 5 times the weight of sodium silicate to dilute, Under high-speed stirring at 4000 rev / min, add the mixed nano-powder material with 12% weight of diluted natron, and stir for 10 to 30 minutes;
[0045] 3) Add hydrochloric acid dropwise (obtained by adding concentrated hydrochloric acid to 1 times the volume of water to dilute), the molar ratio of the hydrogen ion contained in the hydrochloric acid to the sodium silicate contained in the above-mentioned sodium silicate is 1: 1; Complete within 60 minutes, continue to stir for 30 minutes, then add hydrochloric acid dropwise to pH 7-7.2...
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