Alkaline-resistant anti-cracking paint for exterior wall

Abstract

The invention discloses an alkaline-resistant anti-cracking paint for an exterior wall. The paint is prepared from the following raw materials in parts by weight: 30-36 parts of a modified composite emulsion, 0.2-0.5 part of modified linen fibers, 0.5-0.7 part of hydroxyethyl cellulose, 1.5-2 parts of 2, 2, 4-trimethyl-1, 3 pentanediol monoisobutyrate, 1.5-2 parts of propylene glycol, 0.15-0.25 part of 2-amino-2-methyl-1-propanol, 40-60 parts of pigments and filler, 0.4-0.6 part of a defoamer, 0.3-0.8 part of a mildew preventive, 0.2-0.3 part of a preservative and 10-12 parts of water. According to the alkaline-resistant anti-cracking paint for the exterior wall disclosed by the invention, the modified linen fibers and the modified composite emulsion are added, so that the film has anti-cracking and alkaline-resistant effects simultaneously.

Description

technical field [0001] The invention belongs to the field of coatings, in particular to an alkali-resistant and anti-crack exterior wall paint. Background technique [0002] So far, there are common problems in exterior wall coatings such as efflorescence, cracking, peeling, and easy discoloration, which seriously affect the decoration effect of exterior walls and waste resources. The exterior wall coating should have two basic functions: one is the protection function; the other is the decoration and beautification function. Therefore, after the exterior wall coating of a house is finished, it needs to be non-pan-alkaline, non-cracking, color-retaining, waterproof, anti-chalking, anti-carbonization , anti-pollution, non-shedding, and good-looking appearance, but so far, most exterior wall paint products cannot meet this requirement. [0003] Most of the efflorescence and cracking of exterior wall coatings are related to the wall structure and the cement lime used in the pl...

AI Technical Summary

Problems solved by technology

[0002] So far, there are common problems in exterior wall coatings such as efflorescence, cracking, peeling, and easy discoloration, which seriously affect the decoration effect of exterior walls and waste resources.

Exterior wall coatings should have two basic functions: one is protection; the other is decoration and beautification. Therefore, after a house is painted with exterior wall coatings, it must be non-pan-alkaline, non-cracking, color-retaining, waterproof, anti-chalking, and anti-carbonization. , anti-pollution, non-shedding, and good-looking appearance, but so far, most exterior wall paint products cannot meet this requirement

[0003] Most of the efflorescence and cracking of the exterior wall coating are related to the wall structure and the cement lime used for the plastering layer. Because the cement lime has high strength and is very alkaline, the wall will expand and cool after being exposed to the sun and rain. Shrinkage, cracks on the surface of the wall, and cracks in the exterior wall paint, so that the salt and alkali in the cement seep out of the surface along with the cracks, destroying the surface effect of the paint film and affecting the performance of the paint film

At present, the functional materials with alkali resistance, crack resistance and certain hardness at home and abroad are all single materials or functions, and it is difficult to meet the performance requirements of alkali resistance, crack resistance and certain hardness at the same time.

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