Main structure of sandstone paint
Aggregate including colored aggregate and normal aggregate. The aggregate is two kinds of color of natural stone after crushing, washing, screening and other procedures of processing, has good weather resistance, acid and alkali resistance and color fastness, non artificial sand sintering. Ordinary aggregate good whiteness, high silicon content of quartz sand, because natural stone color is dim, when used as a single color is dull, with a certain amount of white quartz sand and natural color powder use, can adjust the depth of color, so that the coating color rich sense of the level, to obtain similar natural stone texture, but also reduce the production cost. Influence of particle size of aggregate matching sandstone paint and coating performance of the construction state is very large, if the aggregate is too thick, easy to precipitate in the coating, spraying sand ground will increase, the amount of paint, coating and coating covering power decreased, the appearance of rough, easy to accumulate dust and pollution such as; the aggregate particles are too small, decorative effect is poor. Therefore, the particle size is not easy to use collocation, influence of coating decorative effect, but also can make the dense coating.
Binder is one of the key factors affecting the performance of the sandstone paint, it directly affects the sandstone film hardness bonding strength, water resistance, weather resistance, etc. for sandstone paint emulsion should meet the following three requirements: the stability of A emulsion paint film forming colorless, transparent, non yellowing and powder under ultraviolet irradiation; B film hardness is high, in order to improve the stain resistance of coating; C water film expansion rate is smaller, the formation of water resistance and whitening film, which has the ability of anti white water.Preparation method: middle layer sandstone paint coating formula: pure acrylic emulsion (strong adhesive force, high MFT emulsion), 30% natural stone sand, using 10% additives covering material is mainly to enhance the sandstone paint coating waterproof and stain resistance, ultraviolet radiation resistant properties, it is convenient for cleaning the day after. Finish including oily two-component polyurethane transparent finish, oily two-component waterborne fluorocarbon transparent finish, single component silicone acrylic finish.
Composition and function of sandstone paintThere are three main parts of the sandstone paint coating: alkali resistant back cover paint, sand paint intermediate layer and top coat. The middle layer of sandstone paint is composed of aggregate, binder (base material), various additives and solvents.
