Composite thermal insulation coating as well as preparation method and application thereof
A heat-insulating coating and composite technology, applied in the direction of reflection/signal coatings, coatings, etc., can solve the problems of high water absorption, short service life, and low investment, and achieve the effect of highlighting weather resistance and improving heat insulation performance
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[0040] The present invention also provides a preparation method of the composite heat-insulating coating, comprising the following steps:
[0041] 1) mixing titanium dioxide, alumina, some fillers, some additives and water to obtain the first mixture;
[0042] 2) mixing the first mixture, cordierite, hollow glass microspheres and remaining fillers to obtain a second mixture;
[0043] 3) Mixing the second mixture, the emulsion and the remaining additives to obtain a composite heat-insulating coating.
[0044] The mass ratio of the part of the filler in step 1) of the present invention to the remaining filler in step 2) is preferably 1 to 2:2 to 3, more preferably 1:2; the part of the additive in step 1) and the remaining filler in step 3) The mass ratio of the remaining additives is preferably 2-3:3-4, more preferably 1:1.
[0045] The mixing time of step 1) of the present invention is preferably 50 to 80 min, more preferably 60 to 70 min; the mixing time of step 2) is prefer...
Embodiment 1
[0050] 15kg titanium dioxide (0.8μm particle size), 15kg alumina (0.8μm particle size), 2.5kg talcum powder (0.3μm particle size), 0.25kg butyl glycol ether, 0.25kg carboxymethyl cellulose and 20kg deionized The water was stirred and mixed for 55 minutes at a speed of 1200 r / min. Then add 2kg of cordierite, 10kg of hollow glass microspheres (10 μm) and 2.5kg of talc powder (0.3 μm), and stir and mix for 45min at a speed of 1100r / min. Finally, 35 kg of styrene-acrylic emulsion, 0.25 kg of ethylene glycol butyl ether and 0.25 kg of carboxymethyl cellulose were added, and stirred and mixed for 50 min at a speed of 1100 r / min to obtain a composite heat-insulating coating.
[0051] The composite heat-insulating paint of Example 1 is used in building exterior walls, the heat reflectance can reach 93%, and the heat-insulating effect of the paint can make the temperature difference reach 16°C.
Embodiment 2
[0053] 45kg rutile titanium dioxide (particle size is 1μm), 23kg alumina (particle size is 1μm), 1.5kg titanium dioxide (particle size is 0.6μm), 1.5kg mica powder (particle size is 0.6μm), 0.5kg calcium silicate, 0.5kg Hydroxyethyl cellulose and 30kg deionized water were stirred and mixed for 65min at a speed of 1000r / min. Then add 5kg cordierite, 12kg hollow glass microspheres (15μm), 3kg titanium dioxide (0.6μm particle size) and 3kg mica powder (0.6μm particle size), and stir and mix at 1000r / min for 55min. Finally, 45kg of acrylic emulsion, 0.5kg of calcium silicate and 0.5kg of hydroxyethyl cellulose were added, and stirred and mixed for 60min at a speed of 1000r / min to obtain a composite heat-insulating coating.
[0054] The composite heat-insulating paint of Example 2 is used in building exterior walls, the heat reflectance can reach 95%, and the heat-insulating effect of the paint can make the temperature difference reach 20°C.
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