Real stone paint has simple production process, low cost and excellent performance. It has broad prospects for higher-grade development, such as environmental protection, high elasticity and non-stick dust.
Applicable to concrete or cement inner and outer walls and brick walls, as well as asbestos cement board, wood board, gypsum board, polyurethane foam board and other substrates. The surface layer of the construction substrate should be smooth, clean, and have good strength. The new wall should be dried for one month before construction. The old wall should be refurbished. The base should be leveled to remove looseness, peeling off the surface and dust and grease. Construction can be carried out after impurities.
In order to meet the needs of the increasingly personalized development of the high-end architectural decoration industry, such as the imitation of marble, the development of imitation granite coatings, it shows the importance of the spraying process, only the more complete and more supporting construction technology can fully display the real stone. The unique appearance and superior performance of the paint.
High-grade real stone paints must be equipped with strict construction techniques. Although the paint quality is good, if the construction personnel have insufficient experience and low quality, it is not comprehensive enough to understand the performance of different real stone paints, and it will cause various problems.
Coating hardness
The coating of real stone paint is very hard after drying and the nail can't be shaken. If the real stone paint can still be shaken with nails after three days of construction under good weather conditions, it should be considered that the coating is too soft. The main reason is to choose The lotion is not appropriate.
When preparing the real stone paint, they adopt the same emulsion as the latex paint, which results in a lower emulsion content in the real stone paint formulation, and the coating is not tight enough due to the presence of a large amount of sandstone during film formation. Research by paint research and development personnel: The bond strength of emulsions prepared for real stone paint should not be lower than 3 MPa, and the minimum film formation temperature should not be lower than 15 °C. A higher minimum film formation temperature may cause a defect that film formation is not easy when the temperature is low, and can be solved by appropriately adding a film-forming auxiliary. The film-forming auxiliary agent can be completely volatilized after the coating is dried, and generally does not affect the performance of the coating film. True stone paint selects a composite emulsion with higher adhesion and lower film formation temperature, which fundamentally solves the problem that the coating is too soft.
Good water resistance and stable coloration of the coating
The coating has good water resistance, stable coloration, no whitishness, no color difference
Some real stone paint coatings will whitish after each rain, and the coating will become loose. After the rain stops, the coating will return to its original color after sun exposure. In fact, this is due to the poor water resistance of the coating and the absorption of moisture. The formulation is based on the fact that the selected acrylic emulsion needs to be added with surfactant during the synthesis. Some manufacturers use surfactants to increase the stability of the emulsion. It is greatly over-sized; some manufacturers add carboxymethyl cellulose, hydroxyethyl cellulose and other substances as thickeners when preparing real stone paint, and add sodium benzoate as a preservative. These materials are water-soluble or hydrophilic, and the coating remains in the coating after film formation, which greatly reduces the water resistance of the coating. The experiment shows that the pure acrylic emulsion is mixed with quartz sand, without any additives, the coating formed by spraying has a water absorption rate of 0.42%; and 0.4% hydroxyethyl cellulose is added on the basis of the above coating, the water absorption rate increases. To 4.3%. Since the coating of the real stone paint is thick, once it absorbs the water, it is not easily released in a short period of time, thus causing a white appearance and a loose inside of the coating. Film-forming auxiliaries used in EES for real stone paint: silicone modified acrylate emulsion (silicone-acrylic emulsion). It has good water resistance after drying, so the coating does not blush when it is exposed to water after drying.
With the improvement of the decorative requirements of interior and exterior wall coatings, natural stone paints are more and more popular with their unique appearance and performance. Many high-end residential, courtyard and even high-rise buildings have been painted with natural granite, marble and other natural The stone paint with very similar appearance is required to have strong hardness, waterproof and aging resistance. In the following, we will briefly introduce some experiences in the preparation of natural stone paint and its spraying process based on some of our experiences. Coatings, Inks, Resins, Adhesives, Formulations 1. Natural True Stone Paints Natural natural stone paints are mainly made of high molecular polymers, natural colored stone sands and related additives. They are hard and stone-like after solidification, and have the effect of natural stone. It has strong adhesion, weather resistance, water resistance and easy repair. It is resistant to alkaline closed base oil and weather resistant waterproof protective surface oil.
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