There are many important applications of Ewende micro silica powder (silica fume) in the coating industry, as follows:
Improvement of coating properties:
– Improvement of strength: Micro silica powder can increase the hardness and abrasion resistance of coatings. Its tiny particles can fill in between the polymer molecules of the coating to form a more compact structure, so that the coating can better resist deformation and wear when subjected to external forces, thus prolonging the service life of the coating, which is suitable for some places with high requirements for abrasion resistance, such as factory floors, parking lots and other floor coatings.
– Enhance the durability: micro-silica powder can enhance the coating’s resistance to environmental factors, such as ultraviolet resistance, chemical corrosion resistance, weather resistance and so on. In the outdoor environment, coatings are easily eroded by ultraviolet rays, rain, acid and alkali, etc. After adding micro silica powder, a more stable coating structure can be formed to reduce the damage caused by these factors, and keep the appearance and performance of coatings stable for a long time.
– Improvement of seepage resistance: the filling effect of micro-silica powder can reduce the porosity of the coating, reducing the penetration of moisture and gas. This is very important for some places that need waterproof, moisture-proof and anti-gas permeability, such as waterproof coatings for basements, bathrooms, roofs and other parts of buildings, as well as packaging coatings for food, pharmaceuticals and other industries.
Optimize the performance of coating construction:
– Filling effect: the fine particles of micro silica powder can be filled into the tiny pores and defects in the coatings to increase the volume solid content of the coatings and reduce the use of liquid components in the coatings. This not only reduces the cost of the coating, but also improves the coating rate so that the coating can cover the surface of the substrate more evenly during construction.
– Improved rheology: Micro silica powders can improve the rheology of coatings, making them easier to apply and level during construction. The spherical particle form and smooth surface of micro silica powder can reduce the resistance of the coating in the construction process and improve the fluidity of the coating, so that the coating can be better adapted to different construction methods and construction environments.
Enhance the adhesion of coatings:
Micro silica powder can increase the bonding force between coatings and substrates and improve the adhesion of coatings. The highly active surface of micro silica powder can form chemical bonding or physical adsorption with the surface of the substrate, so that the coating can better adhere to the substrate, and it is not easy to appear peeling, flaking and other phenomena, so as to ensure the quality of the construction of the coating.
As an additive of functional coatings:
In some special functional coatings, micro silica powder also plays an important role. For example, in fireproof coatings, micro silica powder can synergize with other fireproof materials to improve the fireproof performance of coatings; in anticorrosive coatings, micro silica powder can enhance the anticorrosive effect of coatings and prolong the service life of coated objects.
However, when using micro silica powder, it is necessary to pay attention to the uniformity of dispersion to ensure that the micro silica powder is evenly dispersed in the coating to avoid the phenomenon of agglomeration, and at the same time to ensure that it is compatible with the coating system to avoid adverse reactions.
