6.
Base course alkali flashing: the moisture content of the base course is too high, which makes the alkali resistant sealing primer unable to neutralize the base course alkali, and makes the base course alkaline destroy the paint film of water in water coating, resulting in whitening.
It is necessary to adopt a series of reasonable construction processes for the wall, such as selecting leveling mortar with excellent crack resistance, alkali resistant reinforcing material, alkali resistant primer, weather resistant intermediate paint, etc.
The construction temperature is too low and the humidity is too high: the drying of water in water coating needs to be in an optimal environment to ensure uniform and full color particles and achieve realistic results.
Therefore, in the early stage, we must have enough understanding and understanding of water in water, timely prevent and learn to deal with them, so as to effectively avoid problems in construction.
2.
Before and after the construction of water in water coating, it is inevitable to encounter such problems, such as storage, stability, cracking, blooming, etc.
When the flow velocity in the transmission pipeline changes sharply, the dispersed particles are compressed into solid particles, resulting in pitting of the coating film.
3.
Understand problems and avoid them carefully The storage problem of water in water coating is that the water-based colorful coating is composed of dispersed phase and continuous phase, and the product of water in water colorful coating is formed because the two phases are relatively insoluble.
The problem of spray in water coating 1.
5.
After the construction of water in water imitation stone coating, the sun shines on the uneven wall surface, resulting in the visual effect of blooming.
However, due to the difference of specific gravity or improper control of system viscosity, sometimes the dispersed phase will sink and the continuous phase will float up after long-term storage, resulting in floating water stratification after storage.
The problem of stability effect of water in water coating is that the water composition of water-based coating is high, and the volatilization of water strongly depends on the environment.
Improper construction: the construction is not standardized, and the construction is not carried out according to the construction process and material instructions, resulting in the blooming of water in water coating.
4.
Water in water coating construction equipment problems water in water coating has certain corrosivity and adhesion to coating equipment, especially to iron equipment, which is easy to dissolve the metal of transmission pipeline, precipitate dispersed particles and produce pitting on the coating film; Moreover, the water in water colorful coating has poor dispersion stability against strong mechanical force.
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the quality of the product itself: the problem of the material itself, the improper proportion of the water emulsion, the proportion of the auxiliaries, or the poor synergy of raw materials among different raw materials enterprises, resulting in the white water flower coating.
Poor flatness of the base course: the flatness of the base course is too poor.
If the construction environment temperature is too low or the humidity is too high, the coating will not be fully dry and cause whitening.
Cracking of water in water coating Although the water in water coating has the characteristics of anti cracking, it can not achieve the decorative effect alone.
In low humidity environment, it may dry quickly and sometimes cause cracks; In the high humidity environment, the film-forming process will be very slow, which is easy to cause the looseness of the coating; In addition, the newly formed coating layer is often very sensitive to water, and the increase of water vapor content in the air will cause coating wrinkles.
Short recoating time: when the paint film is not dry enough, it begins to brush the surface, resulting in that the water vapor during the drying process of the water in water paint film cannot be discharged outside the surface, resulting in the flower of the top coat of the water in water paint.
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