Coating process: production process of modified calcium ash powder technology coating

Key tips: production of oxidized starch glue: ① Add the water in the formula into the mixing bucket (take out three times of the weight of flake alkali from it and add it to other mixing buckets, add flake alkali, stir and dissolve completely, and reserve) Then add ferrous sulfate to the above mixing barrel, start the mixer, make ferrous sulfate (beat ferrous sulfate into fine powder first) stir and disperse to dissolve in the water, then the water turns yellowish The corn starch in the formula is then added to the stirred yellowish water solution Stir continuously for 5 minutes to make the starch fully wet and disperse Five minutes later, to the stirred Lake 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 Coating home news: the production of oxidized starch glue: ① add the water in the formula into the mixing bucket (take three times of the weight of flake alkali from it and add it to other mixing buckets, add flake alkali, mix and dissolve completely, and then reserve) Then add ferrous sulfate to the above mixing barrel, start the mixer, make ferrous sulfate (beat ferrous sulfate into fine powder first) stir and disperse to dissolve in the water, then the water turns yellowish The corn starch in the formula is then added to the stirred yellowish water solution Stir continuously for 5 minutes to make the starch fully wet and disperse After 5 minutes, add the dissolved alkali aqueous solution to the stirred starch slurry With the stirring, the starch slurry gradually becomes a thick liquid Continuous stirring for about 15 minutes, the glue began to become mobile glue At this time, the hydrogen peroxide was added to the prescription, stirring for 10 minutes, the glue was oxidized to dilute, then the foam increased greatly, and the amount of drops could be increased by three drops of butyl fat With the increase of stirring time, the oxidation is deepened When the glue can flow downward with bamboo stick, and it is very soft, if there is a viscometer (coating 4 cups) to measure its viscosity up to 40-60 seconds, it can add 10% solution of sodium thiosulfate which has been dissolved in advance After mixing evenly, add 5% solution of borax which has been dissolved in advance Stir it fully to make the glue complexed After mixing for 10 minutes, add stabilizer Polyacrylamide 1% concentration of water solution, after mixing evenly, stop the machine, and the discharge material can be used for coating production after standing in the glue storage tank for 24 hours Production of sodium thiosulfate, borax and polyacrylamide aqueous solution in production: ① production of sodium thiosulfate aqueous solution: take 45 kg of tap water and add 5 kg of sodium thiosulfate into a bucket, mix and dissolve it into 50 kg of 10% aqueous solution for standby ② Preparation of borax solution: generally, borax solution is prepared before the temporary addition of borax solution, because borax is easy to dissolve in hot water above 80 ℃, and borax will crystallize and precipitate when the temperature drops after melting Method: add 19 kg of hot water above 80 ℃ to a container, add 1 kg of borax, and mix to make it fully dissolved Then keep it warm for storage ③ Preparation of polyacrylamide aqueous solution: take 7kg tap water into the container, stir the water, and sprinkle 0.7kg polyacrylamide into the water stirred in "powder form" After adding, stir for about 20 minutes to make it dissolve completely Generally, it can be dissolved for standby one or two days in advance 2 Coating manufacturing process: first, modify the calcium ash powder: according to the formula, add 120 kg of calcium ash powder and 90 kg of water into the mixing bucket, and mix with the mixer to form a uniform slurry Then finely beat alum and sodium fluoride, use 20 kg boiled water to form a solution, and add it to the slurry to fully mix Stir for about 40 minutes to discharge Add the oxidized glue specified in the formula to the paint mixing barrel, start the mixer, stir the glue, add the paint color paste, and mix well Then add the light calcium and talcum powder in the formula respectively After adding, stir for about 50 minutes continuously to make the coating very soft without dry powder particles Slowly add the modified lime calcium powder slurry and stir (do not mix at one time) Stir well for 60 minutes, make soft paint, stop stirring on the eve of adding three butyl fat to remove foam If there is a grinder, the coating can be fed into the grinder and ground to less than 100 microns If there is no grinder, 120 mesh fine screen can be used for manual forced filtration with brush 3、 Note 1 The oxidized starch glue in this product can be stored more than once, because it can be used for two months under sealed condition 2 Sodium thiosulfate and polyacrylamide aqueous solution in the formula can be stored for a long time, so they can be stored more for later use 3 This product is generally brushed twice 4 The ferrous sulfate in the formula of this product can be reduced a little to increase the whiteness 5 Due to the high content of grey calcium in this product, a small test should be done first when adding the paint color paste 6 The content of calcium hydroxide in lime powder should be more than 90% 7 Before mass production, more small tests should be done, and production can be carried out when all aspects are satisfied 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,