Aqueous elastic exterior-wall coating and preparation method thereof

Abstract

The invention discloses an aqueous elastic exterior-wall coating and a preparation method thereof. The coating comprises the compositions in percent by mass: 0.5-2% of water, 20-25% of AP-261 pure acrylic emulsion, 19-22% of A-100 elastic emulsion, 5-8% of propylene glycol antifreezing agent, 4-6% of a film-forming auxiliary agent, 15-17% of CM-10120.0 union carbide, 12-17% of ultrafine titanium dioxide R-930, 4-6% of ultrafine kaolin powder, 4-6% of ultrafine mica powder, 4-6% of ultrafine calcite powder, 0.1-0.3% of a wetting agent AD-405, 0.2-1.0% of a thickening agent TE-936, 0.1-0.5% of a dispersant DP-01, 0.1-0.3% of Cognis antiseptic, and 0.1-0.3% of an antifoaming agent F-111. The coating has the advantages of being high in weatherability, high in chemical corrosion resistance, good in water resistance, scrubbing resistance and artificial ageing resistance, abundant in expressive force, strong in stereoperception, flexible, extremely strong in plasticity, strong in adhesive force, resistant to acids and alkalis, free of color fading, free of peeling, free of cracking, and easy for maintenance and recoating. The preparation technology is simple, cost is low and benefit is good.

Description

Technical field [0001] The invention belongs to the technical field of paint preparation, and relates to an architectural paint, more specifically to a water-based elastic exterior wall paint and a preparation method thereof, and is mainly applied to architectural exterior wall paint. Background technique [0002] At present, most buildings in our country use cement mortar as the base. However, due to the inherent characteristics of cement-based materials, when affected by environmental factors such as temperature changes, alternating dry and wet, freeze-thaw cycles, etc., cracks often occur. If the surface is decorated with ordinary exterior wall coatings, the cracks in the base layer will occur and Expansion causes the coating to crack; with time and the accumulation of the above-mentioned destructive factors, the cracks will further increase and deepen, which will adversely affect or even harm the building. For example, when it is eroded by water, water will penetrate into the...

AI Technical Summary

Problems solved by technology

However, due to the inherent characteristics of cement-based materials, when affected by environmental factors such as temperature changes, alternating wet and dry cycles, and freeze-thaw cycles, cracks often occur. Expansion leads to cracking of the coating; with the prolongation of time and the accumulation of the above-mentioned damage factors, the cracks will be further enlarged and deepened, which will have adverse effects or even damage the building. Further penetration into the interior; in addition to the further expansion of cracks due to the alternating action of dry and wet, it may also cause corrosion of the steel bars inside the concrete, and even affect the use of the building. During corrosion, these corrosive gases will corrode the coating, internal cement mortar and concrete, carbonize the concrete, and may also affect the internal reinforcement of the structure

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