Gas-coagulation lightweight surface exterior wall coating

Abstract

The invention discloses a gas-coagulation lightweight surface exterior wall coating, and belongs to the technical field of building coatings. The gas-coagulation lightweight surface exterior wall coating comprises the following components in parts by weight: 25-30 parts of a film forming emulsion, 10-20 parts of titanium white powder, 5-6 parts of kaolin, 24-30 parts of heavy calcium, 1-1.5 pats of an anti-freezing agent, 0.4-0.8 part of an anti-foaming agent, 0.2-0.5 part of an adhesion accelerator, 0.1-0.15 part of an anti-radiation agent, 1-2 parts of an anti-cracking enhancer, 0.1-0.2 partof a wetting agent, 0.8-1.2 parts of a film-forming auxiliary agent, 0.1-0.2 part of a cellulose thickener, 0.1-0.3 part of a dispersant, 0.2-0.3 part of a PH regulator, 1-3 parts of a viscosity stabilizer, 5-6 parts of silver nanoparticles, 5-6 pats of a magnetic aerogel, and 10-20 parts of deionized water. By the lightweight and heat insulation characteristics of the magnetic aerogel, the exterior wall coating is endowed with the characteristics of gas-coagulation and lightweight, and the uniform dispersion of the magnetic aerogel in the coating is guided by applying the external magnetic field in the mixing process, so that the overall performance of the coating is improved, such as cracking resistance, viscosity and heat insulation of the coating.

Description

technical field [0001] The invention relates to the technical field of architectural coatings, in particular to an air-condensing lightweight surface exterior wall coating. Background technique [0002] Airgel, also known as xerogel, when the gel removes most of the solvent, the liquid content in the gel is much less than the solid content, or the space network structure of the gel is filled with gas, and the appearance is Solid, this is xerogel, also known as airgel, such as gelatin, gum arabic, silica gel, hair, nails, etc. Airgel also has the properties of gel, that is, it has swelling effect, thixotropy effect, and ionizing effect. Slurry effect, as long as the gel of any substance can be dried to remove the internal solvent, and can basically keep its shape unchanged, and the product has high porosity and low density, it can be called aerogel, because the density is extremely low, At present, the lightest aerogel is only 0.16 mg per cubic centimeter, which is slightly ...

AI Technical Summary

Problems solved by technology

[0005] The coatings used on the exterior walls of buildings in China are mainly latex paints, and their film-forming substances are polymer emulsions. The emulsions used for exterior walls include styrene-acrylic emulsions, pure acrylic emulsions, silicon-acrylic emulsions, fluorocarbon emulsions, etc. Whether it is styrene-acrylic emulsions , pure acrylic emulsion, silicone acrylic emulsion or fluorocarbon emulsion, after the latex paint is applied to the wall, after five to ten years of outdoor aging, its performance will decline significantly, mainly manifested as powder falling or even falling off of the coating. On the one hand, since the film-forming substance is an organic polymer with a certain degree of hydrophilicity, mold and algae will grow under a certain temperature and humidity environment, which will cause the coating to lose powder and fall off after natural aging. The main reason is the breakage of the polymer chain. , The main bonds of styrene-acrylic emulsion and pure acrylic emulsion are C-C bond and C-O bond, and the bond energy is low. In the case of long-term outdoor ultraviolet radiation, the C-C bond and C-O bond are prone to breakage, that is, the polymer chain is broken, and the paint The film-forming substance of the film is not formed into a film by the action of ultraviolet light, and the phenomenon of coating powder falling and falling off occurs. Since the film-forming substance of latex paint is an emulsion, under suitable temperature and humidity conditions, the emulsion polymer is The growth of mold and algae provides nutrition, so ordinary latex paint is more likely to grow mold and algae. Therefore, after adding airgel materials to traditional exterior wall coatings, although the heat insulation effect has been improved, but due to the extremely high quality of airgel Due to the light volume and small size, there is no very effective stirring method in the prior art to disperse it evenly in the coating, so that the heat insulation effect of the coating is uneven, and the uneven dispersion leads to the low strength of the coating after the coating is formed, and even Some aerogels will exist on the surface of the coating exposed to the environment, which is prone to cracking and falling off, shortening the service life of the coating

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