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    Home > Coatings News > Paints and Coatings Market > Common knowledge of coating: solution to the alkali of exterior wall coating

    Common knowledge of coating: solution to the alkali of exterior wall coating

    • Last Update: 2020-04-03
    • Source: Internet
    • Author: User
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    Core tips: first, reduce or eliminate the alkalinity of the base course and putty layer, so that its pH value is controlled below 10 If the pH value reaches 8, it is more ideal This is a fundamental treatment method The specific operation method is as follows: 1 It is mainly the maintenance of mortar plastering layer to eliminate the base alkalinity If it can be watered for 3-4 times to make the cement completely polymerized, its alkalinity will decrease rapidly If there is no watering condition, the drying time will be longer, at least more than 20 days, depending on natural rainwater and natural polymerization Therefore, the watering and curing of mortar plastering layer is the best way to reduce alkali Of course, cement 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 Paint Home News: first, reduce or eliminate the alkalinity of the base course and putty layer, so that its pH value is controlled below 10 If the pH value reaches 8, it is more ideal This is a cure The specific operation methods are as follows: 1 To eliminate the alkali of base course is mainly the maintenance of mortar plastering layer If the cement can be watered 3-4 times to make the cement completely polymerized, the alkali will decrease quickly If there is no watering condition, the drying time will be longer, at least more than 20 days, depending on natural rainwater and natural polymerization Therefore, the watering and curing of mortar plastering layer is the best way to reduce alkali Of course, the selection of cement is also very important, and the selection of qualified cement is the basis 2 To eliminate the alkalinity of putty layer is mainly to select leveling putty with good quality This kind of putty has good hardness and water resistance, but its alkalinity is not high The key is to increase the amount of binder in the putty and reduce the amount of cement At the same time, water the putty 1-2 times in time after construction, so that the cement in the putty layer can completely polymerize and harden, so that the pH value can also be reduced In the market, some low-end putties rely entirely on cement to improve their adhesion, but they are not maintained by rain in time, resulting in pH of more than 10, which will definitely lead to alkali 2、 The primer with good sealing property is selected to penetrate and seal the base course and putty layer, which makes it difficult for the alkaline substance to penetrate into the coating with water vapor This is a method of treating the standard However, if the primer is not well penetrated or the alkaline material of the basic putty is excessive, the phenomenon of alkalescence will still appear If the primer is better penetrated, the emulsion of the primer should be fine and the viscosity should be low Therefore, the transparent primer is better than the white primer under normal conditions Of course, the latex with small grain size and good sealing ability is the key 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,
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