When we are painting epoxy floor paint, we often find that the epoxy floor paint we bought has precipitated or caked. Is this because we were deceived and bought inferior epoxy floor paint products? In fact, it is not because the composition of the paint naturally sinks. This time we are going to teach you how to prevent the precipitation and caking of epoxy floor coatings. 1、在设计涂料配方时，考虑适合的颜基比。一般颜基比不要超过2∶1，特殊品种除外。颜填料尽量选用密度小些的，有些颜料如红丹粉、铬黄、云母氧化铁、铁红、沉淀硫酸钡等，密度都较大，少用或酌情用，低密度颜填料替代。
1. When designing the formulation of coatings, the appropriate ratio of pigment to base should be considered. Generally, the ratio of pigment to base should not exceed 2:1, except for special varieties. Pigments and fillers should be selected with lower density as far as possible. Some pigments, such as red powder, chrome yellow, mica iron oxide, iron red, precipitated barium sulfate, etc., have higher density and should be replaced by low density pigments and fillers.
2. The viscosity of coatings should not be too low, and the selected pigments and fillers should not react with each other. For example, zinc powder, aluminium powder, potassium oxide and so on are more active, and they should not be used or packed separately in coatings with poor storage stability. In the production of coatings, appropriate equipment should be used to grind and disperse evenly, so as to achieve the prescribed viscosity and fineness. For example, chlorinated rubber coatings, poor stability, easy to react with iron, using stainless steel or stone lining equipment production.
3. Thixotropic coatings are prepared by adding anti-settling agents into the coatings and using the special properties of a small amount of additives to change the suspension state of the coatings. The common anti-sedimentation agents are stearic acid series, gas phase silicon dioxide, modified bentonite, hydrogenated castor oil and so on. At present, there are many kinds of imported anti-settling agents, generally adding 0.1% - 0.5%, can prevent precipitation, and adding 2% - 3%, can be made into thixotropic coatings, forming a higher film thickness.
Preventive measures for dealers. 1. Coatings should be stored in a cool and ventilated place, and paint barrels should be placed horizontally, inverted or shaken several times regularly. Attention should be paid to the storage period of coatings, first put into storage, first use. For some coatings with low storage life, such as chlorinated rubber, vinyl chloride and polyurethane, special care should be taken.
2. For the deposited coatings, they can be uniformly stirred manually or mechanically before being used. For the caking phenomenon, the movable part should be poured out first, and the sediment should be shoveled from the bottom of the container with a scraper. After crushing, the flowing medium should be poured back into the original barrel for full mixing.
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