Classification of coatings: fluorosilicone modified acrylic emulsion exterior wall coatings

Core tip: Introduction: In addition to beautifying and decorating the building, the important thing is that the exterior wall coating can protect the building and protect the base from the outside atmosphere, ultraviolet, rain and chemical substances Acrylic emulsion paint is one of the main varieties of exterior wall paint at present because of its moderate price, good relative stability, easy access to raw materials and simple process However, because acrylic resin emulsion has high temperature resistance and low temperature and brittle, the most obvious drawback in building coatings is high temperature sticky, which leads to low stain resistance and poor water resistance and weatherability in external environment Paint agent, top 10 Chinese wall paint brands Recommended introduction: interior wall paint and exterior wall paint can achieve beautiful, clean and pleasant effects, but the effects in different environments are different, so the color of the paint will be different There are ten brands of Chinese paint, ten brands of global paint, ten brands of Chinese wall paint, and ten brands of Chinese paint, Famous trademark of Chinese paint and coating In private rooms, most of us choose according to our own personality, personal hobbies and living habits The younger generation will choose the interior wall paint with rich colors and bright colors, while the older ones will have some working experience Introduction: in addition to the beautification and decoration of the building, the important thing is that the exterior wall coating has a protective effect on the building, so that the grass-roots level is protected from the erosion of the external atmosphere, ultraviolet, rain and chemical substances Acrylic emulsion paint is one of the main varieties of exterior wall paint at present because of its moderate price, good relative stability, easy access to raw materials and simple process However, because acrylic resin emulsion has high temperature resistance and low temperature and brittle, the most obvious drawback in building coatings is high temperature sticky, resulting in resistance to contamination, which is characterized by poor water resistance and weatherability in the external environment, which limits its application In order to get excellent performance of exterior wall coatings, a certain amount of fluorosilicone monomer was modified in acrylic emulsion, and the coating was given by using C-F bond and Si-O bond energy, high electronegativity and low surface energy Excellent weather resistance, durability, chemical resistance, corrosion resistance, insulation, non flammability, low temperature flexibility, hydrophobicity, non adhesion and pollution resistance Production: the preparation of fluorosilicone modified acrylic emulsion is composed of fluorosilicone prepolymer, methyl methacrylate, butyl acrylate and acrylic acid In the three component emulsifier system, the copolymerization is carried out by means of pre emulsification polymerization with potassium persulfate or ammonium persulfate as catalyst, and finally neutralized to pH=8 to produce fluorosilicone modified acrylic emulsion The preparation of fluorosilicone modified acrylic emulsion exterior wall coating (1) basic formula II The preparation process of the new fluorosilicone modified acrylic emulsion is prepared according to the formula of Table 1, and the process flow is shown in Figure 1 Performance test: 1 Coating performance test after the inspection, all performance indexes of the exterior wall coating meet the requirements of national standard GB / T 9755-2001 superior products, and the test results are shown in Table 2 It can be seen from table 2 that the paint has excellent stain resistance 2 The weather resistance of the coating shall be tested in accordance with the national standard GB / T 1865-1997 "pornographic and varnish artificial climate aging and artificial radiation exposure (filtered xenon arc radiation)" See Table 3 for specific data Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,