Redispersible polymer powder is a powder-like adhesive made from high-molecular polymers (such as vinyl acetate-ethylene copolymer) through spray drying. When it comes into contact with water, it can be redispersed into an emulsion and form a continuous film. This characteristic enables it to play a key role in latex paint systems and it is an important additive for enhancing the performance of coatings.
In the production of latex paint, the addition of redispersible polymer powder can optimize the film-forming property of the coating. After the coating is applied and the water evaporates, the latex powder particles will re-disperse and blend into a continuous polymer film, closely covering the pigment and filler particles, significantly enhancing the compactness of the paint film. This, in turn, improves the water resistance, scrub resistance and anti-powdering ability of the latex paint, especially suitable for the formula design of high scrub resistance latex paint for interior walls and weather-resistant latex paint for exterior walls.
This material can also improve the construction performance of latex paint. It can enhance the thixotropy and leveling property of the coating, making it less likely to have defects such as sagging and brush marks during the application process. At the same time, it strengthens the adhesion between the paint film and the substrate. Even on porous substrates such as cement-based and gypsum-based ones, a firm coating can be formed, reducing the risk of paint film peeling.
In addition, redispersible polymer powder has good compatibility and can work in synergy with the emulsion, pigments, fillers and various additives in latex paint without disrupting the stability of the system. It can also reduce the amount of emulsion used and, to a certain extent, lower production costs. In environmentally friendly latex paint, the selection of formaldehyde-free and low-VOC redispersible latex powder can also help the coating meet the relevant standards of green building materials, which is in line with the current market demand for environmentally friendly coatings.
In conclusion, redispersible polymer powder, with its advantages such as film-forming property, workability and compatibility, can significantly enhance the adhesion, water resistance, anti-corrosion and wear resistance of latex paint, becoming an indispensable raw material in the production of latex paint and promoting the upgrading of the performance and quality of coating products.
Suggestion
Select VAE redispersible polymer powder with high flexibility and strong weather resistance. The dosage is generally 2% to 5% of the total formula. The specific dosage needs to be determined through small-scale tests based on the target performance. At the same time, pay attention to matching appropriate cellulose ethers to balance water retention and leveling.
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