The way of production of water-based paint
The whole process can be conditionally divided into several stages. The first is the combination of a solution of an aqueous polymer dispersion with a pigment and a filler. Second - the resulting mixture passes the dispersion( grinding of solid and liquid bodies).The third is the addition of additives, which are necessary in accordance with the specifications. The fourth is the packing of the finished material by the banks.
Dispersing of ingredients is carried out in special dispersants( mills).In these devices there are several cameras, and in them - a shaft with disks. It is with the help of it that grinding occurs. The resulting mixture is placed in a dissolver tank( mixer).There is a thorough mixing, the components are added according to the specifications.
The mixing times of all ingredients depend on the properties of each component, the total volume of the mixture, and the technical power of the dissolver and dispersant. As a rule, 30 minutes are enough for each operation. In doing so, all work should be carried out at a temperature of +5 ° C.
At the last stage, packagings and mesh filters are prepared. It is through them that the finished paint will pour in.
Advantages and disadvantages of
water-based paint Water-emulsion paint for walls and ceilings has a number of advantages in comparison with oil paints. First, it faster dries .Sometimes, only a couple of hours is enough for the coating to dry. Secondly, is absolutely safe and harmless to humans and the environment. This means that during painting you do not need to leave the premises urgently.
Thirdly, the paint does not have a sharp odor, which usually lasts several weeks after the completion of the .Fourthly, can be painted with almost any shade, adding special pigments .For this even a special colorless compound is sold. In building stores, as a rule, a catalog of colors and suitable pigments is offered. Fifth, the process of applying paint is simple enough, and all tools are easily cleaned with ordinary water .Do not use any solvents. Of the shortcomings can be identified only a few: the work can be done only at a temperature of +5 ° C, the material is not cheap. For outdoor works, you need to choose the most expensive paint, because the conditions on the street are significantly different from the conditions in the room.
Water-based paint: technical data
Water-based paint for ceiling and walls has the appropriate technical characteristics. They include: composition, consumption, specific gravity, viscosity, storage conditions and shelf life. Composition of water-based paint : latex, thickener, fillers, antiseptic. Consumption of on one layer is about 150-200 ml / m2.The number of layers depends on the absorbency of the substrate.
The viscosity of of water-based paint is determined by the viscometer and should be equal to an average of 40-45 seconds( when applied by brush), 20-25( when using a paint sprayer).In fact, viscosity is an indicator that determines the degree of dilution of the paint with water. That is, the water is added to a certain level, and then it is measured with a viscometer.
Specific gravity of of water-based paint is about 1.35 kg / l. Adhesion of is on average 2.0 mPa. Drying time is from 2 to 24 hours. It all depends on the temperature and humidity of the air. The desired temperature is about + 20 ° С, and humidity is 65%.Keep the paint in a dark place( away from sunlight).