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In the outer wall coating elastic coating after the coating, because the elastic coating has high elasticity, so when the cracks of wall, the film was tensile deformation without cracking, the film remains intact, and with a variety of barrier function of the original. In this way, prevents the wall cracking directly exposed to the atmosphere. While the elastic coating with a variety of material (water and other liquid) barrier, thereby blocking all kinds of corrosive substances to the wall in the invasion, effectively protect the walls from harm, give full play to its protective function.
For synthetic resin emulsion elastic building paint, it played in waterproof, seepage at the same time, also has a certain permeability. That is, micro pore elastic coating allows a small amount of water vapor and C02 gas inlet and outlet, the larger particle size of droplets is difficult through the coating. Thus, coating elastic coating with a waterproof breathable effect.
Therefore, compared with other exterior architectural coatings in decorative function as the main function, characterized in that elastic coating, in the play the decorative function at the same time, the protective function is more outstanding. In this way, the use of elastic coating will be able to do a good job in the wall decoration at the same time, to prevent wall leakage, to ensure the normal use of the building to play a functional role.
Waterproof and anti-seepage effect of elastic coating is obvious. In fact, elastic coating because of having a barrier of various harmful gases, can effectively prevent the carbon dioxide through people to grassroots by coating, and to prevent the effect of wall concrete carbonation. The carbonation of concrete is a kind of quality of concrete damage, calcium in concrete (from cement hydration) and reaction of carbon dioxide in the air to produce calcium carbonate reaction. Concrete carbonization, originally alkaline state of concrete pH value decreased, even close to neutral. Therefore, also known as the concrete carbonation for neutralization of concrete. In the alkaline state of concrete, can generate a can inhibit the reinforcement rust protective film on the surface of steel bar rust and prevent the. Concrete carbonization, steel surface passivation film was broken, the loss of concrete protective role against steel corrosion. So the possibility of carbonized concrete which has corroded reinforced. Surface coating elastic coating, coating to prevent cracking and barrier function can effectively prevent the carbon dioxide into the concrete (or cement mortar) in infiltration and prevent carbonization, a research institute has special research on it. An elastic. Wall latex paint evenly standard mortar containing Ca0 in 50mm * 50mm * 25MM block of the sample surface, besmear after curing in the standard state in 7d, a set of standard mortar and then and not brushing coating test block at the same time put test box C02 carbonization, block every 24h weighing once, test of continuous 336h, two specimen due to carbonation resulted in increase in quality of results as shown in figure 22. As can be seen, in under the CO2 environment 24h, not block brushing elastic exterior wall latex paint, increase the quality of more than 3 5g reached saturation, and the walls of the elastic exterior wall latex paint block 24h weight gain only less than 0.5g. Can see the elastic exterior wall latex paint has excellent anti C02 permeability, carbonization degree can reduce cement walls and reinforced to prevent rust.
