Common knowledge of coating: influence of dispersing medium on water in water multicolor coating

Core tip: in an energy-saving society, the exterior wall insulation has been vigorously promoted, which on the other hand limits the application of granite, marble and other heavy materials in the exterior wall facing The water in water multicolour paint is a kind of synthetic resin emulsion as the base material and various auxiliaries The suspension has 2 or more than 2 kinds of water-borne coloring particles Through 1 times spraying, it can form a multicolor coating Its finish is very natural granite effect With its environmental protection and high decoration, water in water multi-color architectural coatings are more and more favored by consumers However, the stability of the water in water multicolor coating is present Paint knowledge how about Akzo Nobel Powder Coating Recommended introduction: powder coating is a kind of coating with different form from general coating, which is in powder form It is a new type of coating, because of its own advantages and more and more known by people Let's introduce Akzo Nobel Powder coating Akzo Nobel Powder coating is a cost-effective coating solution, which can be applied to different kinds of products After the treatment of static electricity and fire baking, a tough and durable coating surface will be formed, with the least impact on the environment Since the introduction of this technology, powder coating has been able to continue to maintain the Paint Home News: in energy-saving society, the external wall insulation has been vigorously promoted, which on the other hand limits the application of granite, marble and other heavy materials in the external wall facing The water in water multicolour paint is a kind of synthetic resin emulsion as the base material and various auxiliaries The suspension has 2 or more than 2 kinds of water-borne coloring particles Through 1 times spraying, it can form a multicolor coating Its finish is very natural granite effect With its environmental protection and high decoration, water in water multi-color architectural coatings are more and more favored by consumers The stability of water in water multicolor coating is one of the main problems The multi-color coating is generally composed of dispersion phase and dispersion medium This paper focuses on the influence of dispersion medium on the water in water multi-color coating system 1 test 1.1 main raw materials Protective adhesive: sodium montmorillonite A, B, calcium montmorillonite C; viscosity reducer: sodium tripolyphosphate, sodium six phosphate; emulsion: acrylic elastic emulsion, silicone acrylic emulsion; pigments and fillers: rutile titanium dioxide, calcium carbonate, water color paste; auxiliary: cellulose HRB250, AMP-95, Texanol, dispersant, wetting agent, defoamer, bactericide, propylene glycol, thickening agent 1.2 main instruments and equipment: SEM multi-function disperser, NDJ-1 rotational viscometer, 202a digital display electric constant temperature drying oven, electronic balance 1.3 test process 1.3.1 preparation of dispersion medium the viscosity reducer is completely dissolved in the water under the agitation of high-speed disperser, and then the inorganic silicate clay used as protective glue is added, which is dispersed to be completely uniform at high speed 1.3.2 add water, cellulose hrb250, AMP-95, dispersant, wetting agent, partial defoamer, bactericide, titanium dioxide, calcium carbonate, etc to the preparation of dispersion phase in turn, and disperse to fineness less than 30 μ m at high speed Then add acrylic acid elastic emulsion and the remaining defoamer separately, disperse at medium speed, mix up the color, and finally add the protective glue solution, and pack it for use The preparation of 1.3.3 water in water multicolor coating was carried out The coloured paint was added to disperse medium at the low speed stirring at the ratio of 1 to 1 of dispersed phase and disperse medium, and the size of different color particles suspension was prepared Finally, the water and water color coating was prepared by adding silicone acrylate emulsion, Texanol, propylene glycol, defoamer, bactericide and thickening agent Results and discussion 2.1 basic principle and the effect of dispersing medium water in water multicolor coating is to disperse the small drops of the original latex coating mixture to form a suspension which can protect the continuous phase of the glue solution and wrap the small drops of the latex coating In order to realize the "water in water" suspension, it is necessary to form a layer of water-insoluble flexible film on the surface of the paint drop at the moment when the water-based latex paint is dispersed in the protective glue solution This layer of flexible film can not only prevent the paint components in the film and the protective glue components outside the film from diffusing each other, but also prevent the aggregation and condensation between the paint drops After spraying, the paint drops in the wet film are still protected in the suspension state in the water phase at first With the evaporation of water in the film, the paint drops are stacked and fused with each other, and finally a solid colorful pattern film is formed [1] Therefore, the dispersing medium has two functions: one is to be used as the dispersing medium, so that the dispersing phase can be evenly dispersed among them; the other is to be used as the protective glue, so that a layer of water-insoluble flexible film can be rapidly formed when the color base paint contacts the protective glue 2.2 the influence of the type of protective glue on the multi-color coating protective glue, as the main component of the dispersion medium, its water absorption, expansion multiple, dispersion in water, cation exchange capacity, suspension, thixotropy and viscosity thermal stability have a great influence on the dispersion medium, which directly affects the granulation form, storage stability and construction of the multi-color coating Table 1 shows the performance of the multi-color coating made of three different protective adhesives 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,