Heat-reflecting insulating coating for outer surface of building and preparation method thereof

Abstract

The invention discloses a heat-reflecting insulating coating for the outer surface of a building, which comprises the following compositions: aqueous nonsoap polymerized emulsion, a titanium pigment, boracic glass bead, ceramic powder, a filler, a wetting agent, a dispersing agent, a thickening agent, a defoaming agent, a film forming additive, propanediol and water; and the invention also discloses a method for preparing the coating. The heat-reflecting insulating coating for the outer surface of the building is coated on the surface of the building, strengthens the solar heat reflecting performance of the outer wall, and reduces the solar heat radiation absorption of the outer wall, thereby reducing the surface temperature of the building and achieving the effect of heat insulation and energy conservation; the coating uses the water as a solvent, does not contain heavy metal, has no toxicity or pollution, simple and convenient construction process and high cost performance, and is an environment-friendly type multifunctional energy-saving coating.

Description

technical field [0001] The invention relates to a heat-reflecting heat-insulating paint for building exterior surfaces and a preparation method thereof. Background technique [0002] Building energy conservation occupies a major position in the national energy conservation. At present, materials such as polystyrene and extruded plastics are used to insulate buildings through construction techniques such as mounting and wrapping. Although these materials can also play a role in heat insulation, However, these materials have the disadvantages of being easy to burn, polluting the environment, complex construction technology, and short service life. Therefore, the industry needs to develop coatings that can reduce the low absorption rate of buildings to solar radiation and apply them to the surface of objects to reduce the increase in surface temperature caused by solar radiation and achieve the effect of thermal light reflection, heat insulation and energy saving. [0003] Chi...

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Problems solved by technology

[0003] Chinese patents CN1434063A and CN1361186A have developed a heat-reflective coating respectively. They all adopt polymer emulsion as a film-forming material, hollow microspheres as a heat-insulating material, and add pigments, fillers, auxiliary agents, etc., disclosed in CN1434063A Heat reflective heat insulation coating is based on epoxy modified acrylic emulsion, which has good corrosion resistance and heat insulation function, but the outdoor weather resistance and stain resistance of this product are not ideal. The highest reflectivity is only 80%, and most of the cases are between 50% and 80%.

The reflective and heat-insulating coating disclosed in CN1361186A uses acrylic nanoemulsion as a film-forming material, and adds an infrared reflector, which has a certain heat-light reflection and heat-insulation effect. The disadvantage of this coating is that too many fillers are added, and there are few heat-light reflection functional pigments , affecting its solar reflectance

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