Coating knowledge: application of new technology in exterior wall decoration coating

Core tip: excellent weather resistance, stain resistance, long service life, VOC reduction and functional compounding will be the future research and development direction of exterior wall decorative coatings With the improvement of people's awareness of environmental protection and the attention to health, the contradiction between architectural coatings and the environment has become increasingly apparent, and the pollution problem has increasingly attracted the attention of the society Therefore, it is urgent to develop architectural coatings in the direction of environmental protection and green The variety and structure of coating should be developed towards reducing VOC content and environmental protection products. In the future, China will also focus on high-performance and high-grade coatings, such as nano coatings, waterborne polyurethane coatings and fluorocarbon resin waterborne coatings to adapt Which is the price of Dajin diatom mud Recommended brief introduction: which is the price of Dajin diatom mud? How to buy genuine diatom mud? Guangdong diatom mud agent suggests placing a basin of cold water in the air conditioning room, so that the diatom mud wall can breathe effectively The feature of the breathing wall is obvious When the indoor air is dry, the diatom mud wall will release the absorbed water quickly Put it out to help regulate the indoor dry humidity It is suggested to place a basin of cold water in the air conditioning room, so that the wall of diatom mud can breathe effectively The feature of the wall that can breathe is obvious When the indoor air is relatively dry, the wall of diatom mud will absorb the water Home of coatings: excellent weather resistance, stain resistance, long service life, reducing VOC and functional compounding will be the future research and development direction of exterior wall decorative coatings With the improvement of people's awareness of environmental protection and the attention to health, the contradiction between architectural coatings and the environment has become increasingly apparent, and the pollution problem has increasingly attracted the attention of the society Therefore, it is urgent to develop architectural coatings in the direction of environmental protection and green The variety and structure of coating should be developed towards reducing VOC content and environmental protection products. In the future, China will focus on the research of high-performance and high-grade coatings, such as nano coatings, waterborne polyurethane coatings and fluorocarbon resin waterborne coatings, in order to meet the needs of high-grade residential and public building exterior wall decoration A Since its appearance in 1980s, nano-TiO2 has attracted more and more attention due to its unique photocatalysis, UV shielding and angular heterochromism At present, as a new functional material, nano-TiO2 provides a good condition for the development of green coatings; nano-TiO2 modified building coatings have high washability, antibacterial, self-cleaning and aging resistance Adding nano-TiO2 into epoxy resin coating as UV absorber can prevent the chain from cracking due to long-term UV irradiation, so as to make up for its poor weather resistance and significantly improve its aging resistance B The exterior wall energy storage luminous coating is a special functional coating, which can show the appearance of the whole building at night and has a good decorative effect; If this kind of coating can be successfully industrialized and applied in all commercial areas of the city, the quantity of floodlighting can be greatly reduced while enhancing the night scene decoration of the city, which not only saves the initial investment of the building, but also saves considerable power The afterglow of building exterior wall water-based energy storage luminous coating increases with the increase of illuminance, which is related to the length of illumination time Generally, it takes more than 20 minutes to reach saturation state, and it reaches saturation within 10 minutes when the light is very strong After dark, its afterglow is higher within 4 hours, and the effect is obvious Then with the extension of time, the afterglow time of the luminescent coating can reach 14h In addition, the result of radioactivity test of the coating belongs to class A, which proves that the luminous coating can be used in various environments C powdery architectural coatings The powdery coating of architectural coatings has many unique technical, economic and environmental advantages Especially for synthetic resin emulsion coatings, auxiliaries have a large proportion in the formula cost Many of these auxiliaries are used to maintain the storage properties of coatings After being powdered, the use of these auxiliaries can be eliminated, and considerable packaging costs can also be saved Not only that, because after the coating is powdered, the Portland cement, gypsum and lime with low price and many unique performance advantages can be easily used in its components, without high-temperature baking, so that the powder building coating has a good performance cost comprehensive advantage, and has a good development prospect D Elastic exterior wall coating; most of the exterior walls of buildings are leveled with cement mortar before surface coating Due to the inherent characteristics of cement-based materials, when affected by environmental factors such as temperature change, dry wet alternation, freeze-thaw cycle, cracks often occur If the surface is painted with paint, it will lead to cracks In view of this kind of malpractice of building exterior wall, a kind of elastic exterior wall coating has been developed recently Elastic exterior wall coating is a kind of functional architectural coating, which not only has a good decorative effect on the exterior wall, but also has a special function of covering the cracks in the base layer The polymer particles in the base material used in the elastic exterior wall coating are core-shell structure agglomerates reacted by the bridging technology, in which the main body is soft monomer, and the outer surface is oligomer with multiple hard bodies The drying and film forming process of elastic exterior wall coating is basically the same as that of common emulsion paint Both of them are evaporation of water and deformation of polymer particles, but the principle is different There is only one kind of polymer particles deforming and agglomerating to form film for common latex paint, while when the elastic exterior wall paint is dry to form film, with the evaporation of water, the hard and soft monomers of polymer particles are closely arranged up and down Through the action of ultraviolet in sunlight for a period of time, the oligomer on the surface reacts, crosslinks and solidifies to form a very thin and dense hard surface layer, that is, the core-shell structure with soft inside and hard outside is formed [focus on WeChat official account "paint net"; pay attention to surprises, scan code to see if your husband is selling paint.. 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