In order to solve some operation methods of low-temperature construction, however, under low-temperature conditions, the construction of epoxy floor paint is more difficult and the curing reaction speed is slower, which means that it takes longer to cure. At this time, the slowly drying surface is more susceptible to the influence of air dust, moisture and so on, so it needs to be better. The protective measures after the construction of epoxy floor, including dust and waterproof, etc. The curing process of epoxy coatings is the process of crosslinking between epoxy resin and curing agent. The two materials react from the original liquid state to form a solid film structure. This reaction process is affected by many factors such as temperature, humidity, temperature difference, ventilation and so on. The change of each factor will cause corresponding changes. Many adverse risks. In order to solve this problem, it is necessary to optimize the construction of epoxy flooring, as follows:
1. Increasing room temperature
When the surface temperature is below 5 C, it is necessary to close the construction site, raise the room temperature above 5 C with heating equipment, and stabilize it for a certain period of time before construction. If there is no heating equipment, the high temperature gas can be blown to the applied ground by hot air blower.
2. Avoiding Low Temperature Period
Temperature in the morning and evening is usually relatively low, so we can avoid these two periods during construction, and arrange the construction time after 10:00 a.m., because the temperature will rise gradually after 10:00 a.m., it will be more favorable for the curing of floor paint in low temperature environment, and the change of temperature difference will not be too big, which reduces the negative of large curing span. Surface effect.
3. Adequate Solvent Addition
When the temperature is too low, the curing reaction is slow, and the viscosity of the paint will increase, which is not easy to flow. At this time, adding less than 5% volatile solvents can improve the fluidity and make the paint have better construction effect. Such solvents are acetone, ethyl acetate, butyl acetate and so on.
4. Preheating of Coatings
Before mixing materials, keeping the paint in a warm environment and keeping it in a higher temperature can also improve the effect of low-temperature construction. External heating methods can also be used, such as using steam, hot water and hot air to heat the material, so that the material can be used at a temperature of less than 38 degrees Celsius before mixing.
Temperature has a great influence on the chemical reaction of curing. Usually, the temperature of epoxy floor paint is between 5 ~30 C, which is the most suitable. However, China has a vast territory, diverse climate, moving northward, and many areas will be in a low temperature for most of the time, which is very unfavorable for the construction of epoxy floor paint.
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