Thermal insulation coating for building exterior walls and preparation method thereof

Abstract

The invention discloses a thermal insulation coating for building exterior walls. The thermal insulation coating is prepared from the following raw materials in parts by weight: 50-60 parts of a silicone acrylic emulsion, 18-22 parts of modified aerogel, 7-9 parts of floating beads, 3-4 parts of reinforcing filler, 2-3 parts of mirabilite and 0.6-1 part of auxiliaries. The invention also disclosesa preparation method of the thermal insulation coating. According to the invention, the modified aerogel is added into the coating, the silicon dioxide aerogel can be uniformly dispersed in the coating after being modified, and the aerogel can greatly improve the microporosity in the coating and prolong the heat conduction path, so that the thermal insulation performance of the coating is improved; besides, materials (rutile titanium dioxide and silicon carbide) capable of reflecting radiant heat are introduced to block a propagation path of radiant heat conduction, and a phase change energystorage material (mirabilite) is used as an efficient storage substance of heat energy, so that the coating has excellent heat preservation and heat insulation performance by starting from three paths(conduction, radiation and convection) of heat transfer.

Description

technical field [0001] The invention belongs to the technical field of architectural coatings, and in particular relates to a thermal insulation coating for building exterior walls and a preparation method thereof. Background technique [0002] As the pace of urban construction continues to accelerate, the installed capacity of air-conditioning and heating equipment continues to increase, which makes the proportion of building energy consumption continue to increase. The significance of building energy conservation is becoming more and more important. The thermal insulation of building exterior walls is an important part of building energy conservation. Coatings applied to exterior wall concrete or exterior wall panels are exposed to the atmospheric environment and undergo natural changes in climate such as wind, sun, and rain, which will cause the coating to chalk, discolor, peel off, stain, etc. Lose the original decorative effect, thereby affecting the appearance of the b...

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Problems solved by technology

[0003] At present, the performance of the thermal insulation coating of exterior wall panels is mainly improved from the screening of emulsion, fillers, additives and their mutual dispersion and stability. The Chinese invention patent with the patent number of CN03118029.9 discloses a multifunctional nano-scale building exterior A wall paint and a preparation method thereof. The building exterior wall paint uses nano-titanium dioxide, nano-zinc oxide, nano-silica, sericite, and kaolin as main functional components to prepare a multifunctional exterior wall paint, which improves the anti-aging ability, Scrub resistance, antibacterial and other properties, but the thermal insulation properties need to be improved, and at the same time, there are many steps in the production process and the process is more complicated

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