Winter real stone paint white high hair season, teacher Fu to recruit!

The composition of real stone paint
1, anti-alkali primer, 2, real stone paint main material, 3, self-cleaning cover paint
Many people think that I just really stone paint effect, do real stone paint main material is finished. It's easy to overlook the importance of the base and finish. Especially in the summer, many people in order to save
to
. Even the face paint of real stone paint is saved, and as a result, the real stone paint is fine. On the contrary, with the same formula, in the winter construction, the situation is different, once the rain coupled with low temperatures, there is a real stone paint surface "white" problem.
The real reason for the whitening of real stone paint
true stone paint in the summer high temperature, whitening phenomenon is rarely seen, usually occur in winter, and when it rains for several days, when it rains for several days, the surface of the real stone paint just finished construction will be a piece into a comprehensive white phenomenon. Especially when the temperature is below 10 degrees C and the humidity is above 85, the surface of the real stone paint will turn white or appear to be colored, as if covered by a layer of white frost fuzzy.
Resol the reason for the whitening of the real stone paint
construction environment temperature and emulsion glassed film temperature factors
the film-forming temperature of emulsion, i.e. emulsion glass temperature (except elastic emulsion), the temperature is above 26 degrees C, when the temperature is above or equal to the glassified temperature emulsion can be fully cured, only emulsion curing can play the waterproof performance of emulsion. However, when the temperature is lower than the temperature of the emulsion, the film-forming time of the emulsion becomes longer, but when the temperature is less than 10 degrees C, the emulsion is relatively "fresh", the emulsion can not be completely cured, can only be dried. When the temperature is below 5 degrees Celsius, the real stone paint in the barrel may also be frozen. That is to say, when the temperature is lower than a certain value, real stone paint can not be constructed, so it is not difficult to explain the real stone paint in winter white complaints are much more special.
the selection factors of raw materials
A. The choice of emulsion
phenyl propylene emulsion, it is well known that long-term water, phenyl propylene emulsion is 100 percent white, summer may soak a little longer. Pure propylene or silicon propylene, the effect is better than phenylpropan. But when the temperature is too low and the construction is not dry when encountering the cold winter and rain, the good formula real stone paint is also facing the danger of whitening. Experiments show that: at a cold temperature below 4 degrees C, a better silicone-propylene emulsion was used to do the same experiment, and the results were true stone paint or whitening. Therefore, the environment, weather is an important factor in the whitening of real stone paint.
B. The choice of additives
1, cellulose is hydro-water-type thickener, with more construction and preservation are much better, but the waterproofness of real stone paint will be weakened, resulting in white surface, so cellulose should be used with MT-217 modified bentonite, the effect can achieve a better state.
2, alkali thickening added to the real stone paint has a very good canning effect, but with more real stone paint waterproofing correspondingly reduced, alkali thickening in the real stone paint table dry will be reunited with the real stone paint surface and emulsion film, due to alkali thickening hydrothermline is very strong, which will seriously reduce the water resistance of the emulsion, more easily make the real stone paint surface whitening.
3, film-forming additives and antifreeze, so that the lotion in the winter is very good winter. Increase the stability and antifreeze of the emulsion, reduce the glassy temperature of the emulsion, extend the drying time, but obviously, the water resistance is reduced, but also increase the chance of whitening the stone paint.
Real stone paint white solution
1, temperature environmental factors, when the temperature is below 10 degrees C, as far as possible not to work, such as the need for construction, do not choose in the construction of 5 days before and after the rainy weather, to be completely dry stone paint must be sprayed with water-like paint.
2, the formula of real stone paint key selection of emulsions, additives to add appropriate, as far as possible to find non-hydro-friendly additives, hydro-friendly additives to properly and steadily do more data in the laboratory, looking for emulsion additives added to the critical point. It is recommended to use MT-217 modified bentonite with cellulose use, which can not only solve the problem of whitening flowers but also better control the phenomenon of flying sand, and can improve the quality of real stone paint in practical application.
3, avoid cutting material: anti-alkali primer must be applied, and keep the substrate completely sealed, if the leakage is soaked by rain back alkali caused by whitening, real stone paint on the bottom cut failure, resulting in irreversible situation. Re-construction must be eradicated.
4, real stone paint can not be sprayed less, because the number of natural sand in real stone paint is thicker, no cover force, so spraying must be completely covered not permeable bottom, about 4-5kg/m2 prevails (medium coarse type), waterproof paint can not be less sprayed, the best choice of water-based paint, not only environmental protection can also effectively permeable water.
how to solve the whitening of the real stone paint
1, check whether due to less coating or leakage of anti-alkali base coating caused by the bottom of the real stone paint whitening. If it belongs to the cause of pan-alkali whitening, the project can only be redoed, otherwise, can only be reworked.
2, if it is due to the emulsion is not completely dry caused by whitening. When the temperature picks up, whitening resumes automatically, and if you need to quickly restore the original color, try using an oily paint roller or spray it again.
real stone paint construction precautions
1, the choice of putty, it is best to choose black putty powder, low alkaline, easy to neutralise alkaline after maintenance.
2, putty drying flat, must use water maintenance, neutral putty alkaline, if putty alkaline is too strong, anti-alkali primer is also difficult to resist, so water maintenance and alkaline is key.
3, can not steal material reduction, primer to do enough.
4, can not be too low temperature, humidity is too high in the environment of construction.
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