General knowledge of coating: research and preparation of water in water multicolor coating

Core tip: the original w / W multi-color coating patents are 1-6, such as Japan's special public Zhao 36-1913 and the United States' usp3458328 The patent in Japan is that polyvinyl alcohol coatings react with borax to gelate and then disperse into the water phase The United States patent is different, it is polyvinyl alcohol, casein and other substances into polymer emulsion, and then dispersed in gel containing aqueous solution Our trial is similar to that of the latter, adding another natural polymer material in the latex knee, making use of its gel properties Paint knowledge | precautions for wall paint color selection Recommended introduction: when painting the wall, the owner sometimes has difficulty in choosing what color of the wall paint to paint In fact, there is no ugly color in the wall paint, only the disharmonious color matching The use of wall color contains the knowledge of health Too strong color will stimulate people's perception, make people have a sense of fidgety, affect people's mental health Grasp the basic principles of wall color and paint a colorful space 1、 Wall paint color selection notice 1 Light color is generally used for the top surface Light colors make people feel light, dark colors make people feel heavy Usually, the treatment of rooms is from top to bottom, from shallow to deep For example, the ceiling and walls of rooms are white and Home of coatings: the original w / W multi-color coating patents are 1-6, such as Japan's special public Zhao 36-1913 and the United States' usp3458328 The patent in Japan is that polyvinyl alcohol coatings react with borax to gelate and then disperse into the water phase The United States patent is different, it is polyvinyl alcohol, casein and other substances into polymer emulsion, and then dispersed in gel containing aqueous solution Our trial is similar to that of the latter, which is to add another natural polymer material in the latex knee, and use its gel properties to prepare multicolor paint Due to the use of latex paint with better comprehensive performance, the film performance should be better than that of polyvinyl alcohol paint 1 Experimental apparatus and raw materials (1) experimental apparatus: jb90-d type powerful electric mixer, SK2 sanding machine (2) raw materials: dispersant (orotan, 45% romenhas), emulsifier MS-1 (40 ± 2%, Shanghai Jinshan Chemical Co., Ltd.), fast penetrant t (300 of e-penetrant BX standard product, Shanghai Jinshan Chemical Co., Ltd.), Pingpingjia o-20 (Tianjin daokang Auxiliary Factory), titanium dioxide (rutile type), hydroxyethyl cellulose (hs30000, Germany), plasticizer, phthalate, ammonia, styrene, butyl acrylate, acrylic acid, glycol butyl ether, concentrated hydrochloric acid, ammonium persulfate, all of the above reagents are CP 2 during the experiment 2.1 polyacrylate emulsion was prepared by mixing the dispersant, a small amount of ammonium persulfate and deionized water in a certain proportion (A) The emulsifier, ammonium persulfate and deionized water are mixed evenly in a certain proportion (B) Mix styrene, butyl acrylate and acrylic acid in a certain proportion (c) Add a certain amount of deionized water into the four bottle with two separating funnels and thermometer, stir and heat it to 80 ℃ Add liquid a and keep at 80-83 ℃ for 5min Put liquid B and liquid C into two drip funnels respectively, and then start to drip at the same time The temperature of the system was maintained at 83-87 ℃ by controlling the droplet acceleration to control the reaction speed After the addition, heat preservation 1H, then cooling to below 50 degrees, adding plasticizer, and adjusting the pH value to 7~8 by ammonia water, after filtering the polyacrylate emulsion 2.2 color paste grinding mix the pigment, fast penetrant T, o-20, glycol butyl ether and deionized water evenly, and then put them into the sand mill for grinding to obtain various color pastes Its formulation is shown in Table 1 (with white pulp as an example only): Table 1 white color formula 2.3 color paint preparation, mixing color paste, polyacrylate emulsion, protective glue and deionized in a certain proportion, that is, paint Its general formula is shown in Table 2 (for example only white paint): Table 2 white paint formulation 1: the protective adhesive is a natural polymer compound, which can take place in the presence of gel liquid mentioned below In the process of granulation, due to the formation of gelation, a soft protective film can be formed on the outer surface of the agitated and disperse colored paint particles to prevent the re agglomeration of the paint particles 2.4 preparation of gel solution Add 100 hydrochloric acid in 1.6 parts of 12mol/L, 0.035 gel additives, and stir well 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 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