Water-based sand wall-shaped pearly coating and preparation method thereof

Abstract

The invention provides a water-based sand wall-shaped pearly coating which comprises pearly colorful sand and a basic coating, wherein the pearly colorful sand is white sand with pearly pigment and resin binder coated on surface. According to the invention, pearly pigment and resin binder are coated on the surface of white sand, so that pearly pigment is uniformly fixed on the surface of white sand; the white sand is combined with the basic coating, so that color difference of coating caused by change on arrangement mode of pearly pigment during the construction process can be prevented, and the acquired water-based sand wall-shaped pearly coating has high color stability, more abundant color expression and colorful pearly effect; and meanwhile, the water-based sand wall-shaped pearly coating has high glossiness, excellent covering property, high water resistance, high mechanical stability, high constructability and high bonding strength, and is capable of meeting the requirements forconstruction external wall coatings.

Description

technical field [0001] The invention belongs to the field of coatings, in particular to a water-based sand wall-shaped pearlescent coating and a preparation method thereof. Background technique [0002] Pearlescent paint is a kind of paint in which mica pearlescent pigments with titanium dioxide or iron oxide attached to the surface are added to the paint base. When the light enters the pearlescent paint, it first passes through the titanium dioxide or iron oxide layer and takes on the color of titanium dioxide or iron oxide. Then complex refraction and interference occur in the mica particles, combined with the special transparent color contained in the mica itself, so that the reflected light has a flash similar to the surface of the pearl, and the pearlescent coating can be seen from different angles Therefore, coating pearlescent paint on the exterior walls of buildings and other surfaces can give people a novel, colorful and dazzling feeling. [0003] The excellent opt...

AI Technical Summary

Problems solved by technology

Conventional water-based pearlescent paint, for example, a kind of water-based pearlescent paint that is easy to construct disclosed in CN102732140A, by 30~70 parts of polyurethane-polyacrylate composite emulsion, 1~15 parts of pearlescent pigment, 1~5 parts of dispersant , 1-5 parts of film-forming aids, 1-5 parts of solubilizers, 0.1-1 parts of defoamers, 0.1-3 parts of thickeners, 0-1 parts of pH regulators, 0-1 parts antifungal agent, 0-1 part of preservative and 60-140 parts of water; and a water-based multifunctional pearlescent coating disclosed in CN1580158A, which is composed of acrylic resin adhesive, water, pigment, calcium carbonate, di Silicon oxide, film-forming aids, dispersants, rheology modifiers, Youchuang covering agents, pearl powder, thickeners, defoamers, fungicides, anti-fungal agents, propylene glycol and other components; these water-based coatings are used in There are the following problems: (1) The coating is thin and the crack resistance is poor. The pearlescent coating is mostly flat coating. After it is air-dried, the thickness of the coating film obtained is only about 0.15mm, which cannot be effectively applied to the exterior wall of the building. (2) the pearlescent effect is single, and the existing pearlescent paint can only show a kind of pearlescent color after coating the whole building exterior wall plane. To realize the colorful pearlescent effect, it is necessary to use different colors of pearlescent paint Mixed coating, the construction process is cumbersome

[0005] In order to solve the problems of the existing pearlescent coatings such as thin coating and single pearlescent effect when coating the exterior walls of buildings, it needs to be made into sand wall-like coatings to realize the protection of the exterior walls of buildings. However, if the pearlescent coatings are simply applied The pigment directly replaces the powder filler in the sand-wall-like paint to prepare a sand-wall-like pearlescent paint. Since the specific gravity of the pearlescent pigment is very low, and the proportion of white sand particles in the sand-wall-like paint is high, it is unavoidable that the pearlescent pigment in the obtained pearlescent paint is unevenly distributed. Moreover, since pearlescent pigments are usually flake-like structures, the pearlescent pigments will be arranged in different ways according to the drying environment of the paint caused by the construction time, and then present different luster and colors. The ambient temperature and humidity are uncontrollable, so it is easy to produce color difference when using sand-wall-like pearlescent paint to coat the exterior walls of buildings

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