Thermal insulating coating for building outer wall and preparation method thereof

Abstract

The invention discloses a thermal insulating coating for a building outer wall. The thermal insulating coating is prepared from the following raw materials in parts by weight: 80-120 parts of pure acrylic emulsion, 20-30 parts of Ta2O5-ZnO-SnO2 composite oxide powder, 5-10 parts of ethylenediaminetetraacetic acid tripotassium, 2-5 parts of kaolin, 1-5 parts of borax, 2-5 parts of anti-freezing agent, 5-10 parts of film forming additive, 1.5-2.3 parts of pyrophosphate, 1-2 parts of thickening agent, 2-3 parts of polyoxyethylene polyoxypropylene pentaerythrityl ether, 0.5-1 part of o-nitrobenzenesulphonic acid, and 100-150 parts of water. According to the thermal insulating coating, the Ta2O5-ZnO-SnO2 composite oxide powder is added to remarkably improve the resistance to stain and weather fastness of the coating for the outer wall while ensuring high thermal insulating performance of the coating.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a thermal insulation coating for building exterior walls and a preparation method thereof. Background technique [0002] The fluorine-containing refrigerants used in summer air-conditioning devices will seriously damage the ozone layer, causing irreparable holes in the ozone layer; the suspended particles and nitrogen oxides produced by the heating of northern buildings in winter are the main pollution sources of urban air; various refrigeration systems Most of the energy consumed by heating devices is generated by coal-fired power generation, and a large amount of carbon dioxide is produced while consuming coal, which greatly exacerbates global warming. Therefore, only by reducing the energy consumption of building heat protection and heating from the source can the situation of air pollution be fundamentally changed. [0003] In general, the use of walls with heat i...

AI Technical Summary

Problems solved by technology

However, when XPS boards and EPS boards are used as external wall insulation layers, special adhesives and coupling agents are required to bond the boards to the external wall, and then undergo multiple processes. The construction technology is difficult, and its elasticity and deformation coefficient are large. , It is difficult to combine with the brick wall. Improper construction can easily cause cracking and falling off, forming cracks, hollowing, etc., which will bring hidden dangers of accidents

In addition, the anti-aging ability of these two kinds of foam plastic products is poor, and the service life is about 20 years. The waste materials cannot be degraded and cause white pollution, which makes it difficult to realize recycling.

Because the main components of these two insulation boards are organic matter, their fire performance is poor, and there is a huge potential safety hazard.

The urethane foamed plastic external wall insulation system can achieve seamless insulation and is also suitable for the construction of special-shaped and complex structures. Causes the greenhouse effect and causes environmental pollution, so its application also has certain limitations

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