The real stone paint coating is mainly composed of three parts: alkali-resistant primer, real stone paint intermediate layer and finish paint.
(1) Anti-alkali sealant anti-alkali sealant is divided into different types of base layer. It is divided into oily and water-based. The effect of the primer is that after the solvent (or water) is volatilized, the polymer and pigment filler will penetrate into the pores of the base layer. , thereby blocking the capillary pores on the surface of the base layer, so that the surface of the base layer has better waterproof performance, can eliminate the efflorescence caused by moisture migration in the base layer, hair buds, etc., and also increases the attachment of the main layer and the base layer of the real stone paint. Focus on avoiding peeling and loosening.
(2) The middle layer of real stone paint The middle layer of real stone paint is composed of aggregate, binder (base), various additives and solvent. ?? Aggregate aggregate includes color aggregate and common aggregate. Color aggregate It is a natural stone that has been processed by pulverization, cleaning, screening and other processes. It has good weather resistance, acid and alkali resistance and non-fading properties. It is a non-artificial sintered color sand. The general aggregate has good whiteness and silicon content. High quartz sand, because the color of natural stone powder is relatively dim, the color is relatively dull when used alone, and a certain amount of white quartz sand is used together with natural colored stone powder to adjust the color depth, so that the color tone of the coating is layered and can be obtained. Similar to the texture of natural stone, it also reduces the production cost. The particle size of the aggregate matches the construction of the real stone paint and the performance of the coating. If the aggregate particles are too thick, it will precipitate easily in the paint and land when sprayed. The amount of sand will increase, the amount of coating will be large, and the hiding power of the coating will decrease. The appearance of the coating will be rough and the dust will be easily contaminated. If the aggregate particles are too fine, the decorative effect will be poor. Therefore, the thickness is fine. When used together, it is not easy to affect the decorative effect of the coating, and it can also make the coating dense. ‚Binder (Binder) Binder is one of the key factors affecting the performance of real stone paint. Its quality directly affects the real stone paint. The hardness, bond strength, water resistance, weather resistance and other properties of the film. The emulsion used in real stone paint should meet the following three requirements:
A The emulsion is stable, and the formed paint film is colorless, transparent, and is not easily yellowed and pulverized under ultraviolet irradiation;
The hardness of the B coating film is high to improve the stain resistance of the coating;
C, the water absorption expansion rate of the paint film is small, forming a water-resistant and white-resistant paint film, which has the ability to resist water absorption and whitening. (3) The use of the cover material for the finish paint is mainly to enhance the waterproofness and resistance of the real stone paint coating. Staining, UV-resistant, etc., also facilitates future cleaning. Overcoats include oily two-component polyurethane clear topcoat, oily two-component fluorocarbon clear topcoat, waterborne one-component silicone-acrylic finish, etc. Real stone paint intermediate layer coating formula: Pure acrylic emulsion (strongly bonded, MFT higher emulsion) 30% natural colored stone sand 60% additive 10% Most of the market is still not using pure acrylic, the cost is too high Most of them use styrene-acrylic, and some high-end customers will use pure acrylic to make it, and the pure acrylic content of this formula is very large.
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