Reported by Zhongyan Puhua
Architectural coatings follow the international development trend and develop into water-based coatings. Water-based coatings are one of the main development directions of today’s architectural coatings. Internationally, architectural coatings are mainly water-based coatings. The proportion of traditional solvent-based coatings in our country is gradually declining, and the development speed of water-based coatings is also very fast, and many high-quality coatings have emerged. Therefore, my country’s architectural coatings have kept up with the trend of international development. However, low-grade varieties of polyvinyl alcohol still account for a large proportion. Improving the quality of water-based coatings and developing new varieties are important links in consolidating and developing water-based coatings. The focus of research and development should be on latex paints based on vinyl acetate-acrylic acid copolymer emulsion, styrene-acrylic acid copolymer emulsion and pure acrylic acid series, and strive to improve durability, paint film smoothness, fullness, workability, and decoration. There have been breakthroughs in sexual aspects. For the more mature water-based base materials of epoxy emulsion and water-based polyurethane, we should continue to study high-performance water-based coatings to meet some special requirements.
Develop towards functionalization At present, in addition to accelerating scientific research on existing low-quality functional coatings such as fire protection, mildew prevention, insecticide and insecticide, and heat insulation, we should also strengthen research and solve difficult and new problems in architectural decoration. Composite technology will be an effective way to improve and satisfy various functions.
(Jiangxi New Materials Co., Ltd.)
Among them, in terms of functional compounding, elastic function and respiratory function are compounded: excellent elastic emulsion is compounded with microshell ultrafine particles (microshell ultrafine particles surface-modified by hydrophilic functional groups), so that elasticity and temperature permeability coexist.
Combination of elastic function and low pollution function: The normal temperature reactive emulsion is combined with the hydrophilic technology of the coating film, and the elongation and film density are increased by using a reactive emulsion with a large cross-linked molecular weight to combine the elastic function with low pollution.
It is necessary to strengthen basic research on acid rain-resistant coatings to solve the problem of acid rain corrosion of buildings, and strive to make breakthroughs in the matching of base material composite technology and related additives to solve the increasingly serious problem of acid rain corrosion of buildings in China. . In this regard, some companies in Guangdong already have some products that can prevent acid rain.
The modification function of the base material is compounded. The existing base material is modified with certain special properties and the special phase is compounded. For example, the weather resistance of silicone-modified acrylic, moisture-cured polyurethane and strong temperature permeability are combined to achieve dual special functions.
Towards high-performance and high-end development: The performance of coatings should not only protect and beautify the base material, but also provide special functions that the base material itself cannot have. Using some new base materials can make the coating achieve amazing high-performance and high-end properties. Chemical effects such as highly weather-resistant fluororesin coatings have achieved good results in construction. Because fluororesin coatings have excellent weather resistance, durability, and chemical resistance compared with other resins. However, fluororesin is relatively expensive, and its use in building exterior walls is greatly restricted. The fluororesin architectural coatings produced by some overseas companies have very good performance, but due to the high cost of raw materials, they are difficult to accept by users, which has caused difficulties in promotion. Pay attention to the development of water-based fluororesin, especially the fluororesin-modified copolymer emulsion with vinyl fluoride as the main body, making it a high-quality base material with good performance, high grade, and acceptable price. Lay the foundation for the development of high-performance, high-grade coatings. In terms of research on water-based polyfluoroester coatings, efforts should be concentrated on product development. Polyurethane is one of the high-end materials with excellent performance. Making it water-based not only meets the requirements of reducing pollution and saving energy, but also maintains the characteristics of polyfluoroester itself.
In addition, silicone-modified acrylic resin coatings are an important direction for the development of architectural coatings in my country due to their excellent weather resistance, pollution resistance, and chemical resistance. Powder coating will also be one of the development directions of high-end architectural coatings due to its non-toxicity and good safety performance.
