What should I do if the surface of real stone paint has "whitening"?

China Paint Online News Information
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, a lot of people in order to save money. Even the face paint of real stone paint is saved, and the result is that the real stone paint is all right. 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.
small editor to give the external wall paint wholesale manufacturers of professional guidance: real stone paint white how to do? Look here!The real reason for the whitening of the real stone paint
construction environment temperature and emulsion glassized film temperature factor
the film temperature of emulsion, i.e. emulsion glass temperature (except elastic emulsion), tg temperature is above 26 degrees C, when the temperature is above or equal to the glass 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 below a certain value, real stone paint can not be constructed. This is not difficult to explain the real stone paint in the winter white complaints are much more special.the choice of raw materials
A. Emulsion Choice
PHENC EM, it is well known that long-term water, PHENO emulsion is 100 percent white, summer may soak for 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 cold winter and rain, then good formula real stone paint is also facing the danger of whitening. Experiments show that at cold temperatures 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 the real stone paint white important factors.
B. additive selection
1, cellulose is a hydro-water-based thickener, with more construction and preservation are much better, but the waterproofness of real stone paint will be reduced, resulting in white surface.
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 5 degrees C, can not be constructed, while paying attention, do not choose to have rain in the 5 days before and after the construction of the weather. Water-like finishes must be sprayed after the stone paint is completely dry.
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.
3, to avoid work cut: a: 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, so spraying must be completely covered, about 4-5kg/m2 (medium coarse type) c: waterproof paint can not be less sprayed, the best choice of water-based paint, not only environmental protection can also effectively penetrate 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 pan-alkali whitening. If it is the cause of pan-alkali whitening, the project can only be redoed. Otherwise, you can only rework.
2, if it is due to the emulsion is not completely dry caused by whitening. When the temperature picks up, whitening automatically resumes, and if you need to quickly restore the original color, try using a paint roller or spraying 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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