Overview of the main components and development of dry powder latex paint

The dry powder latex paint is the same as the latex paint. The main raw materials are film-forming materials, pigments and fillers, and functional additives. The film-forming materials are mainly dispersible polymer powder, which is spray-dried and subsequently processed. A powdery thermoplastic resin. The types of dispersible polymer powders commonly found on the market today are: vinyl acetate and ethylene copolymer rubber powder (Vac/E), ethylene and vinyl chloride and lauric acid ternary copolymer rubber powder (E/VC/VL), vinyl acetate. A copolymer of ethylene and a higher fatty acid vinyl ester ternary copolymer (Vac/E/VeoVa). Acrylic latex powder has also appeared in the market, and the weather resistance and water resistance of the paint have been greatly improved.

In recent years, China's architectural coatings have developed rapidly, and product development has also evolved toward water-based, over-estimated, and low-VOC. As an important water-based paint variety, latex paints have an absolute share in the coatings market, especially in the home improvement market, due to their ease of use, ease of coloring, and good water resistance. However, since it is an aqueous dispersion system, the solid content is mostly caused by a large waste of packaging and transportation. In addition, considering the factors such as emulsion film formation and winter antifreeze, additives such as filming aids, ethylene glycol and ammonia water are generally added to latex paints, which become the main source of VOC and cause environmental pollution. Compared with latex paint, dry powder architectural coatings have the advantages of convenient production, zero VOC, easy packaging and transportation, and have gradually gained the attention of everyone. In the field of dry powder architectural coatings, Aberdeen started earlier in this area and applied for related patents in 1980. China's research in this area began in the 1990s. Due to the limitations of raw materials at that time, the development was slow. Most of the poly-alcohol products were used as the main film-forming substances. The products mainly include imitation porcelain coatings, interior wall putty, etc. It is generally low-grade, and its water resistance and weather resistance are poor, and it cannot meet the requirements of exterior wall decoration. In recent years, due to the emergence of redispersible rubber powder and various new building materials additives, the quality of dry powder architectural coatings has been greatly developed, but there are still many problems such as many bubbles, poor leveling, difficulty in dispersion, and poor color stability. Compared with latex paint, there is also a certain gap. Therefore, it is of great significance to develop a dry powder coating for construction which is convenient in construction, good in water resistance, stable in storage and close in performance to latex paint.