The main causes of oral whitening of epoxy flooring paint are as follows: foggy blurring and greasy and slippery appearance occurs in the coating of volatile epoxy flooring paint during drying up. The reason is that the humidity of the coating construction is too poor and the moisture in the atmosphere enters directly into the coating; or when the atmosphere temperature is low and the humidity is poor, the coating is coated. The volatilization rate of solvents in the coating quickly causes the oral temperature of the coating to drop sharply. It is easier for the moisture in the atmosphere to coagulate orally into water and immerse in the coating. The result is foggy whitening, which is called "diffuse whitening". 如硝基和虫胶涂料的涂层较易引起这样发白.再就是鉴于涂料中的真溶剂挥发比其稀释剂快得过量,结局引起涂层中部门树脂析出成白色积淀,使涂层发白,并将这样发白称为"树脂性发白".
For example, the coating of nitro and shellac coatings is easy to cause such whitening. Moreover, in view of the fact that the volatilization of real solvents in coatings is faster than its diluent, the final result causes the white deposition of resin in the middle part of the coatings, whitening the coatings, which is called "resinous whitening".
Preventive measures for epoxy floor paint should raise the temperature of coating construction and reduce the humidity of the atmosphere; it should be suitable for adding true solvents and the boiling point of diluents in coatings, and make the boiling point of true solvents in coatings a little less than or equal to the boiling point of their diluents. Repair steps should immediately be suitable for raising the drying temperature of coatings, if the premise is to obtain better infrared radiator drying coating, so that moisture from the coatings. Loss of volatility; slowly brush a thin layer of true solvent on the whitening part of the coating to melt the resin precipitated from the coating into a continuous coating from scratch, or to make the water vapor in the coating.
Unconstrained evaporation. For shellac varnish whitening, cotton yarn can also be dipped in a small amount of turpentine to wipe the whitening area, water vapor immediately volatilized from the coating lost.
Oral roughness is characterized by a wide variety of particles on the coating verbally, resulting in impurities in the coating; unclean appliances; more dust in the construction situation. Preventive measures should be 200 mesh mesh or cloth to filter the coating; coating appliances should be washed and cleaned by solvent; construction situation should be thoroughly cleaned to ensure dust-free deposition in the atmosphere. Repair steps should be done after the coating is dry-bound into a hard film, sandpaper sanded and slippery. Paint again from scratch.
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