Matte external wall coating and preparation method thereof

Abstract

The invention discloses a matte external wall coating and a preparation method thereof. The coating is prepared from, by mass percent p, 15-20% of water, 0.15% of wetting agent, 0.6-0.8% of organic dispersing agent, 0.4% of mold inhibitor, 0.2% of mineral oil deformer, 18-20% of titanium dioxide, 10-12% of kaolin, 1.5-2% of talcum powder, 6-10% of heavy calcium powder, 0.5-0.7% of hydroxyethyl cellulose, 0.1-0.2% of pH modifier, 0.2% of preservative, 30-40% of matte pure acrylic emulsion, 1-2% of coalescing agent, 1-2% of propylene glycol, 0.3-0.6% of alkali swelling thickening agent and 0.2-0.4% of associated thickener. Due to the fact that room-temperature self-crosslinking pure acrylic emulsion of a soft shell and hard core structure serves as matte pure acrylic emulsion, extinction can be achieved through the coalescing characteristic of the matte pure acrylic emulsion itself; thus, coating color and luster can be reduced by only adding normal pigment to the coating, the long-term durability of the coating is not influenced, and then the low color and luster and the long durability are achieved by the matte external wall coating.

Description

technical field [0001] The invention relates to the field of preparation of architectural coatings, in particular to a method for preparing matte exterior wall coatings with extinction through the film-forming properties of the emulsion itself. Background technique [0002] In recent years, my country's coating industry has developed rapidly, and the total output of coatings has leapt to the forefront of the world, among which architectural coatings have also developed rapidly. Among them, the high-gloss bright paint was loved by people in the early stage due to its beautiful color, and it occupied a large proportion of the paint market. However, with the improvement of people's living standards, on the one hand, people feel that the reflection of high-gloss coatings after film formation is more serious, which is harmful to human eyes; on the other hand, consumers' aesthetic concepts are more and more inclined to leisure, individuality and fashion. This has led to a dramati...

AI Technical Summary

Problems solved by technology

However, due to the addition of a large amount of pigments and fillers in this method, the adsorption of the emulsion in the paint is relatively large, resulting in a decrease in the bonding and protection effect of the emulsion on the pigments and fillers, which is unfavorable for the long-term weather resistance of the exterior wall coating, and it is easy to cause premature failure of the exterior wall coating. aging, fading

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