A kind of durable sun exposure exterior wall coating and preparation method thereof

Abstract

The invention discloses exterior wall coating composed of the following raw materials in parts by weight: 70-80 parts of aqueous acrylic emulsion, 20-30 parts of styrene-acrylic emulsion, 20-56 parts of nano diatomaceous earth, 2-3 parts of benzotriazole, 2-3 parts of ethylhexyl methacrylate, 3-5 parts of absolute ethyl alcohol, 0.7-1 part of 2-(3,4-epoxy cyclohexyl) ethyltrimethoxysilane, 0.6-1 part of dodecyl trimethyl ammonium chloride, 0.5-1 part of 2-hydroxyl-4-octyloxy benzophenone, 1-2 parts of dioctyl sodium succinate, 0.2-0.4 part of polyoxyethylene polyoxypropylene pentaerythritol ester, 3-5 parts of coalescing agent and 10-30 parts of deionized water. The coating produced by the invention is small in raw material loss, small in gel generation, simple in process, firm in paint film, good in glossiness, strong in impact resistance, unlikely to crack, soft in texture, good in decoration, high in weather resistance and scrub resistance, strong in adhesive force, long in service life, free of special smell, free of such heavy metals as mercury and lead and free of formaldehyde volatile, thereby meeting the technical demands of environmentally-friendly coating.

Description

technical field [0001] The invention mainly relates to a paint, in particular to a durable sun-resistant exterior wall paint and a preparation method thereof. Background technique [0002] In recent years, with the improvement of people's living standards and the continuous development of society, people have paid more and more attention to the choice of architectural decorative coatings. The simpler the construction requirements for coatings, the better. Especially for exterior wall coatings, it has not only stayed The most basic protection of the substrate puts forward higher requirements for the decorative effect of the coating. The exterior wall coating requires water resistance and self-cleaning properties. The paint film must be hard and smooth, and the dirt will fall off as soon as it is washed. . [0003] However, the acrylic paints currently on the domestic market have disadvantages such as low gloss, poor adhesion, poor cold resistance, intolerant to water, water ...

AI Technical Summary

Problems solved by technology

[0003] 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