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Water-dispersion paints: types and properties

Water-dispersion paints are considered one of the most convenient and economical building materials. Due to the fact that they do not contain any organic solvents, they have almost no smell. Water-dispersion paints are completely safe from an ecological point of view. They have high adhesion to a wide range of different types of surfaces. They can be applied by spray, roller or paint brush. They have excellent performance characteristics. Due to the listed properties, the dispersion paint occupies a leading position among the materials used for application on the surface.

The binding particles in this material are scattered throughout its volume, after evaporation of moisture they approach. They stick together when they touch, forming a film. Water-dispersion paints usually produce white. To get the desired color or almost any shade, they are tinted using tinting dyes. Tinting can be done either manually or with the help of special machines. The main disadvantage of the first method is the difficulty of observing identical proportions for obtaining the same shades with the following blending. That's why all manufacturers use tinting machines and maps (shade number, proportions).

Water-dispersion paints are divided into several types depending on the binder. The cheapest and the least used - materials based on PVA (polyvinyl acetate). They are mainly used for painting walls and ceilings inside rooms with low humidity. If acrylic polymers are added to them, the wear resistance and water resistance of the future coating can be increased. Materials with butadiene-styrene binder have excellent moisture resistance, but they do not tolerate the influence of ultraviolet light and turn yellow in the sun. For this reason, they are used inside buildings in rooms with artificial lighting.

Water-dispersive acrylic paint (where only this polymer is used as a binder) is the most universal. Most of the materials produced today belong to this category, they are most often used for painting works.

Paints on this basis are excellent. However, when using them, it is necessary to take material from one manufacturer when selecting a shade, since it may not coincide because of differences in the coloring systems. Paints on acrylic base quickly dry out. They perfectly tolerate the effect of sunlight. Such materials make it possible to obtain an elastic coating, cover fine cracks, tolerate washing well and last long. There are options specially adapted for painting "live" wood. Such paints have increased elasticity, and good vapor permeability is combined with water repellent properties.

Regardless of the type of binder, these paints have one weak point: they become unfit for use in case of freezing, therefore, during storage, a positive temperature regime must be ensured.

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