Composite nanometer waterproof and heat-insulating coating for buildings and preparation method thereof
A composite nanomaterial and thermal insulation coating technology, which is applied in the field of composite nano-hydrophobic thermal insulation coatings for buildings and their preparation, can solve the problems of single function and poor environmental protection, and achieves enhanced thermal insulation performance and good thermal insulation effect. , the effect of reducing the emission of odor
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Embodiment 1
[0025] A composite nano-waterproof and heat-insulating coating for buildings, comprising the following raw materials in parts by weight: 150 parts of emulsion, 60 parts of water-based polyurethane, 60 parts of filler, 60 parts of heat-insulating composite nano-material, 30 parts of silicone hydrophobic agent, film-forming auxiliary 5 parts of agent, 3 parts of defoamer, 3 parts of synergist.
[0026] The emulsion used in this example is a polyacrylate emulsion with a solid content of 50%.
[0027] The heat-insulating composite nanomaterial is prepared by the following method: after mixing the nano-silica powder and the nano-titanium dioxide powder according to the mass ratio of 1:1, they are completely immersed in a nitric acid solution with a mass percentage of 50%. , soaked for 24 hours, then washed twice with deionized water, then soaked in a 50% methyltriethoxysilane solution for 6 hours, then placed in a muffle furnace for calcination at 450°C for 3 hours, cooled to At r...
Embodiment 2
[0040] A composite nano-waterproof and heat-insulating coating for buildings, comprising the following raw materials in parts by weight: 180 parts of emulsion, 70 parts of water-based polyurethane, 70 parts of filler, 70 parts of heat-insulating composite nano-material, 40 parts of silicone hydrophobic agent, film-forming auxiliary 8 parts of agent, 5 parts of defoamer, 4 parts of synergist.
[0041] The emulsion used in this example is a polyacrylate emulsion with a solid content of 55%.
[0042] The heat-insulating composite nanomaterial is prepared by the following method: after mixing the nano-silica powder and the nano-titanium dioxide powder according to the mass ratio of 1:1, they are completely immersed in a nitric acid solution with a mass percentage of 50%. , soaked for 24 hours, then washed 3 times with deionized water, then soaked in a 50% methyltriethoxysilane solution for 10 hours, then placed in a muffle furnace and calcined at 450 ° C for 4 hours, cooled to At...
Embodiment 3
[0055] A composite nano-waterproof and heat-insulating coating for buildings, comprising the following raw materials in parts by weight: 200 parts of emulsion, 80 parts of water-based polyurethane, 80 parts of filler, 80 parts of heat-insulating composite nano-material, 50 parts of silicone hydrophobic agent, film-forming auxiliary 10 parts of agent, 6 parts of defoamer, 6 parts of synergist.
[0056] The emulsion used in this example is a polyacrylate emulsion with a solid content of 60%.
[0057] The heat-insulating composite nanomaterial is prepared by the following method: after mixing the nano-silica powder and the nano-titanium dioxide powder according to the mass ratio of 1:1, they are completely immersed in a nitric acid solution with a mass percentage of 50%. , soaked for 24 hours, then washed 3 times with deionized water, then soaked in a 50% methyltriethoxysilane solution for 12 hours, and then placed in a muffle furnace for calcination at 450 ° C for 5 hours, coole...
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