Aqueous paint and preparation method thereof

Abstract

The invention discloses aqueous paint. The aqueous paint comprises the following materials in parts by weight: 80-90 parts of aqueous acrylic emulsion, 15-20 parts of light calcium carbonate, 8-10 parts of hydroxypropyl methyl cellulose, 2-3 parts of dibutyl phthalate, 2-4 parts of glycerol, 1-2 parts of glycol ether, 1-2 parts of sodium polyacrylate, 1-2 parts of buthyl polyacrylate, 2-3 parts of hydrotalcite, 0.2-0.4 part of dimethyl silicon oil, 1-3 parts of diphenylamine, 10-20 parts of deionized water, 0.8-1 part of N-(beta-aminoethyl)-gamma-aminopropyl trimethoxy silane and 10-15 parts of composite mosifying agent. The paint film produced by the preparation method disclosed by the invention is firm, good in glossiness, strong in impact resistance, unlikely to crack, soft in texture, strong in decoration, high in weather resistance, washing-resistant, strong in adhesive force, long in service life, free of special smell, free of heavy metals including mercury, lead and the like, free of formaldehyde volatile matter and capable of satisfying the technical requirements of environmentally-friendly paint. The conventional titanium dioxide is replaced by the added composite modifying agent, so that the surface gloss of the paint film is improved and the production cost is saved; moreover, the paint film has better washing resistance and weather resistance, and therefore, the quality of the paint film is strengthened.

Description

technical field [0001] The invention mainly relates to a coating, in particular to a water-based coating and a preparation method thereof. Background technique [0002] In recent years, water-based, environmentally friendly, multi-functional and high-performance have become the development trend of building exterior wall coatings. With the improvement of people's living standards, the functions of exterior wall coatings such as waterproof, mildew proof, and insect resistance have gradually become popular among the public. Therefore, higher requirements are put forward for the decorative effect of coatings. External wall coatings require water resistance, self-cleaning properties, hard and smooth paint films, and dirt will fall off as soon as they are washed. [0003] At present, the exterior wall coatings used in my country are mainly based on acrylic emulsion. Water-based acrylic coatings have the advantages of moderate cost, excellent weather resistance, good adjustabi...

AI Technical Summary

Problems solved by technology

[0004] However, the acrylic paints currently on the domestic market have disadvantages such as low gloss, poor adhesion, poor cold resistance, intolerant to water, water vapor, acid and alkali, salt solutions and organic polar solvents, poor elasticity at room temperature, and poor wear resistance. High temperature is easy to stick back, low temperature is easy to be brittle, resulting in easy cracking and peeling of the paint, and rainwater is easy to penetrate into the wall and corrode the wall, which not only affects the decoration of the building, but also reduces the service life of the building