The problem of white and poor water resistance of real stone paint when exposed to water is mainly due to the following reasons:
The emulsion is of lower quality. In order to increase the stability of the emulsion, low-grade or low-priced emulsions often add excessive surfactants, which can greatly reduce the water resistance of the emulsion itself.
The amount of lotion is too low. The high-quality emulsion is higher, in order to save costs, the manufacturer only adds a small amount of proportional emulsion, so that the paint film is loose and not dense enough after the real stone paint is dried, the water absorption rate of the paint film is relatively large, and the bonding strength is also reduced accordingly.
Excessive thickener. When manufacturers manufacture real stone paint, they often add a large amount of carboxymethyl cellulose, hydroxyethyl cellulose, etc. as thickeners, these substances are water-soluble or hydrophilic, and the coating remains in the coating after film formation, which greatly reduces the water resistance of the coating.
In view of the above reasons, to solve the problem of whitish and poor water resistance of real stone paint, we can start from the following aspects:
Choose a high-quality lotion. Manufacturers are required to choose polymer with excellent water resistance as the film-forming substance to improve the water resistance of real stone paint from the source.
Increase the proportion of emulsions. Manufacturers are required to increase the proportion of emulsion, and do a lot of comparative tests on the addition of real stone paint emulsion to ensure that a dense and complete paint film is obtained after the construction of real stone paint to block the invasion of rainwater.
Adjust the ratio of hydrophilic substances. In order to ensure the stability and workability of the product, it is necessary to add hydrophilic substances such as cellulose, and the key is to find a precise balance point, which requires manufacturers to study the reasonable ratio of hydrophilic substances such as cellulose through a large number of repeated tests. It not only ensures the effectiveness of the product, but also minimizes the impact on water resistance.
In addition, during the construction process, the following points should also be noted:
Grassroots treatment should be in place. The base layer must be firm, dry and smooth, without oil stains, floating ash and other debris.
The construction environment should be suitable. The construction temperature should be above 5 and the humidity should be below 80%.
The construction method should be correct. The construction of real stone paint should be sprayed or rolled to ensure that the paint film is uniform and impermeable.
Through the above measures, the water resistance of real stone paint can be effectively improved, and the real stone paint can be prevented from turning white when exposed to water.