Summarized as follows: powder paint is a kind of decorative effect like marble, granite. It is mainly made of natural stone powder of various colors. Lacquer decoration of the building, has a natural real natural color and beauty to people with elegant, harmonious and solemn. It is suitable for indoor and outdoor decoration of all kinds of buildings. Especially for decoration on curved buildings, it can receive vivid, realistic and natural effects. Stone with fire prevention, waterproof, acid and alkali resistance, pollution. Non toxic, tasteless, strong adhesive force, never fading and so on, can effectively prevent the environment from erosion of buildings and prolong the life of buildings. Because of good adhesion and resistance to freezing and thawing, the real stone paint is especially suitable for use in cold areas.
Stone construction is simple, easy to dry, the advantages of convenience.
1. the hardness of the coating coating construction of lacquer dries very hard, can not pull the nails. The general construction in three days if various weather conditions are good under the fingernails can still move, should be regarded as a soft coating. The main reason is that the selected emulsion is not appropriate. When preparing the true stone lacquer, they take the same emulsion as the preparation of the latex paint, which leads to the lower emulsion content in the real stone paint formula, and the coating is not close enough because of the existence of a large amount of sand. Research by paint developers: the bonding strength of the emulsion used for genuine stone paint should not be lower than 3MPa, and the minimum film forming temperature should not be less than 15 degrees Celsius. The higher the minimum film forming temperature may cause the difficulty of film formation at low temperature, which can be solved by proper addition of film auxiliaries. The film builder can completely volatilize after drying, and generally does not affect the performance of the coating. The choice of genuine stone paint is the composite emulsion with high cohesive force and the lowest film forming temperature. This fundamentally solves the problem of too soft coating.
2. coating water resistance is good, stable coloring, not white, no color difference, some true stone coating after each rain, will be white, coating becomes loose, and after the rain stopped, the sun, the coating and the original color. In fact, this is due to the poor water resistance of the coating, the absorption of water caused by the formulation reason is that the choice of acrylic emulsion in the synthesis of surfactant, some manufacturers in order to increase the stability of the emulsion, the surface active agent is greatly exceeded; some manufacturers are adding carboxymethyl cellulose in the preparation of real stone lacquer. Hydroxyethyl cellulose and other substances are used as thickeners, and sodium benzoate is added as preservative. All of these substances are water-soluble or hydrophilic. After coating is deposited on the coating, the water resistance of the coating is greatly reduced. The experiment shows that the water absorption rate of the spray formed coating is 0.42% without any additives, and the water absorption rate rises to 4.3% by adding 0.4% hydroxyethyl cellulose on the basis of the above coating. As the coating of the stone paint is thicker, once the water is absorbed, it is not easy to release in a short time, so the appearance is white and the inner coating is loose. Coalescents truestonepaint selection: ESE - silicone modified acrylate emulsion (emulsion).