Coating classification: functional heat insulation elastic texture coating

Core tip: Introduction: Sandstone texture coating is a very popular architectural wall decoration and protective coating at home and abroad in recent years At present, it is also rapidly developed and widely used in China The sandstone texture coating has the thick, natural and simple decorative effect, and has excellent base viscosity, durability and anti-aging ability Its crack resistance and aging property is much better than the conventional exterior wall latex paint Its excellent waterproof, breathability and aging crack resistance can be better applied to the cement substrate and the coating finish matching the external wall insulation system But at present, there are also large pores in the coating film, easy to absorb dust, dirt and consumption 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 Coating home news: Introduction: sandstone texture coating is a very popular building wall decoration and protective coating at home and abroad in recent years, which has been rapidly developed and widely applied in China The sandstone texture coating has the thick, natural and simple decorative effect, and has excellent base viscosity, durability and anti-aging ability Its crack resistance and aging property is much better than the conventional exterior wall latex paint Its excellent waterproof, breathability and aging crack resistance can be better applied to the cement substrate and the coating finish matching the external wall insulation system But at present, there are some disadvantages, such as large pores, easy to absorb dust, dirt, material consumption and lack of compactness In view of this situation, self crosslinking hydrophilic elastic latex, elastic polymer microspheres and hollow glass are used By modifying and strengthening the sandstone texture coating with micro beads, a relatively light compact functional elastic coating can be obtained, which has the advantages of stronger waterproof, durable protection, anti pollution, low dust accumulation and low consumption of materials (high coating rate) At the same time, it also gives the sandstone texture coating an innovative functional feature heat preservation and insulation Enhanced, making it more comprehensive and more advantageous, more suitable for the coating finish of building walls and external wall insulation system Raw materials: SC138 self crosslinking elastic polymer emulsion, modified thickening agent (elastic polymer microsphere), R258 Jin Hongshi type titanium dioxide, heat insulation reinforcing agent (diatomite, nanometer far-infrared additive), hollow glass beads, quartz sand; Functional auxiliaries: thixorheological agent water and aluminum silicate, NXZ defoamer, cf-10 wetting agent, film-forming auxiliaries Texanol, glycol, ase60 thickener, 2020 rheological auxiliaries Production: formula design 1 Selection of film-forming base material The base material used for external sandstone textured coatings usually selects a pure acrylic polymer emulsion with good weather resistance The elastic pure acrylic polymer emulsion can give the coating more excellent toughness and elasticity, have stronger crack resistance effect, and can improve the overall waterproofing of the coating, while the elastic emulsion coating also exists in the summer for high temperature use, which is easy to return to sticky and stain, but it can Through reasonable selection of glass transition temperature and later crosslinking, it can be improved The coating selects the elastomeric polymer emulsion with cross-linking properties as the film forming material Its glass transition temperature is -10 ~ 0 C, and has the self crosslinking characteristic at later stage So as to realize the overall integration effect of film elasticity, waterproof, durability, anti stickiness, low dust accumulation, self-cleaning and high corrosion resistance 2 The selection of modifier and enhancer elastic polymer microsphere is a kind of special functional polymer of micron level It is an organic-inorganic core-shell hollow structure, with outstanding characteristics of ultra-low specific gravity, durability and stability, external soft and internal hard, easy to disperse, which is widely used in coating, ceramics and stone materials , FRP and other materials to enhance the toughness, and effectively reduce the dry weight of the material to obtain a higher cost performance After coupling treatment, the microspheres can be used in the development of the coating system As a modifier, the microspheres can form a significant synergistic effect with the film-forming base material, giving the film a special effect of toughness, compactness, lightness and heat insulation 3 Selection of functional fillers and additives ① the imported hollow glass microspheres are selected as the functional fillers for reflection and heat insulation to enhance and ensure the thermal insulation and reflection effect of the overall coating Hollow glass beads have the excellent characteristics of low density, low thermal conductivity, good light and heat reflection, good strength, durability and stability, which can give the film good thermal insulation and waterproof effect, and also is the key material of reflective thermal insulation coating at present It is confirmed by the test that the hollow glass bead selected in the sandstone texture coating is different from the conventional thermal insulation coating It should have the basic characteristics and requirements of large particle size (80 mesh on average, which can provide texture type external effect), appropriate wall thickness and strength, uniform and complete hollow structure, excellent thermal shielding, and not easy to be damaged in use At present, the imported hollow glass bead is more important Applicable and satisfiable ② Because of its light weight, it is difficult to obtain the satisfactory heat preservation and insulation effect of the film in the effective range In order to obtain the satisfactory energy-saving heat insulation film, diatomite and nano far-infrared additives are specially selected as the enhancement additives of the heat insulation function in this system Among them, diatomite has special porous structure, which can well increase the capacity and pore volume in the system, so as to enhance the thermal insulation effect of the film; nano far-infrared additive is the nano dispersion of far-infrared ceramic powder, whose infrared radiation rate can reach 88%, which can effectively give the film a certain infrared radiation ability The utility model cooperates with and enhances the barrier function of hollow glass beads, so that the coating can obtain the effective heat insulation effect and performance 4 The selection of quartz sand as the main coating of sandstone texture coating system can give the rough and granular appearance of texture coating, and also play a significant role in enhancing (enhancing) the strength of texture coating system The pure and high white round quartz sand is the best choice for general production 60 mesh, 80 mesh and 100 mesh are used for grading, and it is set according to texture appearance 5 Selection of additives The amount of additives is an integral part of the coating In this sandstone system, film-forming additives, dispersants, wetting agents, defoamers, water retaining agents, rheology agents, bactericides and preservatives, pH regulators, etc under normal use are also needed In order to reduce the swelling of the coating after water erosion, silicone additives are introduced into this system to further reduce the overall water absorption of the coating, so as to benefit For greater durability 6 Selection of rheological enhancer As a batch scraping or sandblasting system of thick paste type, the sandstone texture coating must have good applicability and batch scraping requirements In this system, the rheological modifier with thixotropic structure is used to modify and strengthen the system, so that it has good batch scraping and basic viscosity, high water retention to adapt to batch scraping, and further uniformity and stability of the system state Promote See Table 1 for the basic formula of functional heat insulation elastic texture coating The coupling treatment of modifier can be enhanced by dry mixed coupling treatment or wet coupling treatment It is confirmed that the effect of wet coupling treatment is the best (2) dispersing and mixing the water, polymer emulsion, pigment, modified reinforcing agent (after coupling treatment), heat insulation strengthening additives, functional additives (dispersing wetting agent, defoamer, bactericide, modifier, etc.) in the dispersed cylinder, and making the master batch ③ Add the self-made quartz sand and functional filler into the master material in the kneading mixer, mix it slowly and evenly, test and evaluate it after it is mixed evenly, and the finished product will be packaged after it is qualified Performance and technical indicators: development prospects: functional thermal insulation elastic material coating has the overall characteristics and advantages of heat reflection, heat insulation, breathability, waterproof, low temperature flexibility, aging crack resistance, durability and anti-aging, and green environmental protection Compared with the conventional sandstone texture coating, it has stronger waterproof and permeability, flexibility, effective crack resistance and stain resistance, which can better meet the decoration and protection of the coating finish of the building wall, especially as the supporting coating finish of the external insulation system of the external wall, which has the advantages of enhancing the insulation effect, protecting the interface of the insulation layer, reducing the risk of temperature change cracking and deformation, and stronger protection durability It is in line with the theme and development trend of energy conservation in the current era 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,