Thermal insulation coating for building exterior walls and preparation method of thermal insulation coating

Abstract

The invention discloses a thermal insulation coating for building external walls. The thermal insulation coating is prepared from the following raw materials in parts by weight: 50-60 parts of modified polyurethane, 30-36 parts of modified composite aerogel, 8-12 parts of floating beads, 1.5-2 parts of rutile titanium dioxide, 1.5-2 parts of silicon carbide, 2-3 parts of mirabilite and 0.6-1 partof an auxiliary agent. The invention also discloses a preparation method of the coating. By adding the composite aerogel, the microporosity in the coating can be greatly improved, and the heat conduction path can be prolonged; besides, the rutile type titanium dioxide and the silicon carbide capable of reflecting radiant heat are introduced to block a propagation path of radiant heat conduction, and a phase change energy storage material mirabilite is introduced, so that the overall performance of the thermal insulation coating can be effectively improved in the coating; by starting from threepaths (conduction, radiation and convection) of heat transfer, the coating has excellent heat preservation and insulation performance; the film-forming substance can endow the paint with favorable antibacterial, mildew-proof and waterproof properties, and the obtained thermal insulation coating is suitable for building exterior walls.

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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