Mildewproof and waterproof coating for building external wall and production method thereof

Abstract

The invention discloses a mildewproof and waterproof coating for a building external wall, which is prepared from 40 to 50 parts of emulsion, 1 to 2 parts of N-hydroxymethyl acrylamide, 6 to 9 parts of fumed silica, 4 to 6 parts of water, 1 to 2 parts of titanate coupling agent, 6 to 12 parts of auxiliary, 7 to 9 parts of n-butyl acetate, 5 to 8 parts of mildew preventive and 5 to 10 parts of modified nano calcium carbonate, wherein the emulsion is mixed liquor of A-102 silicone acrylic emulsion and A-99 pure acrylic emulsion at the weight ratio of 1.5 to 1, the auxiliary is prepared form 1 to3 weight parts of flatting agent, 1 to 3 weight parts of thickening agent and 4 to 6 weight parts of coalescing agent, and the mildew preventive is octyl-isothiazolinone or 5-chloro-2-methyl-4-isothiazolin-3-ketone. The coating provided by the invention has the advantages of high chemical resistance, good weather resistance, good mold prevention effect, high glossiness, long film service life andthe like.

Description

technical field [0001] The invention relates to the field of chemical coatings, in particular to a mold-proof and waterproof coating for building exterior walls and a production method thereof. Background technique [0002] Architectural waterproof coating is a viscous liquid polymer synthetic material with no fixed shape at room temperature. After coating, it can form a tough waterproof coating film on the surface of the base layer after the volatilization of solvent or water evaporation or reaction curing. . Because the anti-mildew and waterproof coatings on the exterior walls of buildings are used outdoors, they are exposed to wind and sun for many years. Therefore, compared with indoor waterproof coatings, they need stronger waterproof and anti-seepage capabilities, good color retention performance, and can resist ultraviolet rays. . The current waterproof materials for building exterior walls have a short service life. After several years of wind and sun, peeling and ...

AI Technical Summary

Problems solved by technology

[0007] However, in the above-mentioned patent documents, the fillers (such as bamboo charcoal powder) are not modified, and there will be obvious disadvantages when filled in the coating: the first is that the surface is hydrophilic and oleophobic, and the dispersibility in the coating is poor; the second is carbonic acid The binding force between calcium and the paint body is poor, and it can only act as a compatibilizer. When filling with a high proportion of calcium carbonate, the performance of the paint material will drop sharply, so that the product is difficult to be processed and used.

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