Exterior wall coating and preparation method and application method thereof

Abstract

The invention belongs to the technical field of coating production, and in particular relates to exterior wall coating, and a preparation method and an application method thereof. The exterior wall coating comprises components A and B, wherein the component A mainly comprises at least one of isocyanate-terminated prepolymer and polyisocyanate and dimmers and trimers thereof, the component B mainly comprises polyaspartic acid ester and polymerized modified polyaspartic acid ester, and the components A and B are respectively mixed uniformly and packaged independently. The coating provided by the invention is good in elasticity; the polyaspartic acid ester and polymerized modified polyaspartic acid ester disclosed by the invention are combined, so that the elasticity and low-temperature flexibility of the coating can be obviously improved, and the coating has small possibility of cracking and good in weather ability, thus being capable of using in cold regions. Substances in the components A and B are matched with one another according to a specific proportion, so that the coating is uneasy to crack, can cover cracks in a wall body, has the function of exterior wall waterproof coating, is simple and convenient to construct, also can improve the ultraviolet light resistance performance of the coating, is good in light and color maintenance, and can keep the color unchanged for 10-20 years.

Description

technical field [0001] The invention relates to the technical field of paint production, in particular to an exterior wall paint and a preparation method and application method thereof. Background technique [0002] Polyaspartic ester coating is an aliphatic, slow-response, high weather resistance, high-performance coating developed in the field of polyurea in recent years, known as the third-generation polyurea. Compared with traditional polyurethane coatings, polyaspartic acid ester coatings, the main resin polyaspartic acid ester is secondary amino diamine, the reaction speed can be adjusted, it is easy to achieve thick coating, reduce construction time and times, and has excellent performance; At the same time, it has the characteristics of high solid and low viscosity, especially suitable for the production of environmentally friendly coatings. It can reduce the harm to the human body and has good environmental protection performance. [0003] At present, exterior wal...

AI Technical Summary

Problems solved by technology

Although latex paint is easy to construct and environmentally friendly, it has poor gloss and color retention, is easy to pulverize, has poor weather resistance, poor low-temperature flexibility, and is easy to crack; while fluorocarbon exterior wall coatings have ultra-long UV resistance, but their elasticity is insufficient. Low temperature flexibility is poor, easy to crack, easy to crack on the concrete wall, not suitable for use in low temperature and cold areas

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