Waterproof stain-resistant silica sol polyurethane emulsion composite coating for building interior wall

Abstract

The invention discloses a waterproof stain-resistant silica sol polyurethane emulsion composite coating for a building interior wall .The coating is prepared from, by weight, 30-50 parts of a composite base material, 5-15 parts of vinyl acetate, 2-8 parts of styrene-acrylic emulsion, 3-9 parts of dioctyl terephthalate, 2-5 parts of nano-titanium dioxide, 1-6 parts of zinc oxide, 1-5 parts of magnesium hydrate, 2-5 parts of ultrafine silicon dioxide, 3-6 parts of calcined kaolin, 1-4 parts of white corundum micropowder, 2-5 parts of carbon fluoride, 2-6 parts of sodium persulfate, 1-3 parts of talcum powder, 2-4 parts of nano-silicon dioxide, 2-6 parts of xylene, 3-9 parts of a stain-resistant agent, 3-5 parts of a water repellent agent, 2-5 parts of a levelling agent, 1-5 parts of a titanate coupling agent NDZ-311, 2-6 parts of a diluting agent and 8-16 parts of water .The coating is used for the building interior wall and has the excellent water resistance and strain resistance.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a waterproof and pollution-resistant silica sol polyurethane emulsion composite coating for building interior walls. Background technique [0002] Silica sol is a kind of light blue opalescent colloid, which has the characteristics of large specific surface area, strong adsorption capacity, negative charge, and dense hydroxyl groups. It is usually aggregated in the form of siloxane, and it is easy to form a transparent thin layer that is insoluble in water. The comprehensive effect of silica sol penetration and hardening bonding, it is easy to produce mechanical occlusion and chemical bonding with the surface of cement building matrix, the coating has excellent surface adhesion, but the coating film shows a large shrinkage rate during curing, The coating is prone to cracking, which affects the physical and mechanical properties of the coating. [0003] The waterproof and stain resistance...

AI Technical Summary

Problems solved by technology

[0002] Silica sol is a kind of light blue opalescent colloid, which has the characteristics of large specific surface area, strong adsorption capacity, negative charge, and dense hydroxyl groups. It is usually aggregated in the form of siloxane, and it is easy to form a transparent thin layer that is insoluble in water. The comprehensive effect of silica sol penetration and hardening bonding, it is easy to produce mechanical occlusion and chemical bonding with the surface of cement building matrix, the coating has excellent surface adhesion, but the coating film shows a large shrinkage rate during curing, The coating is prone to cracking, which affects the physical and mechanical properties of the coating

[0003] The waterproof and stain resistance of the paint used for the interior wall of the building in the prior art cannot meet the needs of actual use. According to the silica sol and the surface of the cement building matrix, it is easy to produce mechanical interlocking and chemical bonding, and the coating has excellent surface adhesion. Focusing on performance, further modification and enhancement to prepare building interior wall coatings with excellent waterproof and stain resistance performance is an urgent problem to be solved in the current technology

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