Medtronic water-based epoxy resin VS oily epoxy resin 4000889229 1. The construction of oily epoxy coating has high requirements for the original cement floor: 1. Basic surface requirements: a: The basic surface of cement should be solid and firm, and the cement should be poured together with the concrete bottom to prevent the mortar layer from crusting, and the concrete foundation should be dried for 28 days. The ground on the first floor should be waterproof. B: It is required that the surface of cement base surface has no sand, good hardness and no cement pulverization. C: The surface should be smooth, without unevenness, honeycomb pits and cement bumps. D: The PH value of the terrace surface should be between 6.8 and 8.0. E: The ground is free of oil, wax and other paint, latex paint and other residues. If it is cleaned or polished with a special solution. 2. The standard specification of plain land treatment is: no looseness, no oil pollution, neutral PH value, and the surface of the substrate is smooth (moisture content ≤8%) and should be roughened. A: It is required that the surface of the plain foundation has no sand, good hardness and no cement pulverization. If there is pulverization or empty drum, shovel it off first, and then fill it with resin mortar. B: There is no corrosion on the floor surface. Dry it in wet places. 2. Water-based epoxy resin floor construction requirements: As long as the cement floor is solid, free from open water and oil pollution, the new cement floor can be constructed before the maintenance period. 3. Compared with oily epoxy floor coatings, waterborne epoxy floor coatings have the following advantages:
1, oily epoxy floor coatings have high requirements for substrates, and the concrete must be very dry before construction; Waterborne epoxy floor coating has good coating performance on wet concrete, especially on fresh concrete. As long as the concrete is slightly dry and has a certain hardness, it can be constructed, and it also has good recoating property on the old substrate.
2. After the waterborne epoxy floor coating is cured, there will be a small amount of water in the coating film, which can avoid coating defects such as foaming, deformation, hollowing and even peeling caused by over-dense curing of oily epoxy floor coating. Due to the particularity of curing, the waterborne epoxy floor coating has micropores after drying, which can let water vapor penetrate, thus releasing the pressure of water vapor in concrete, preventing the coating from being damaged and protecting the concrete matrix. 3. Water-based: no organic solvent, energy saving and no pollution. It meets the requirements of environmental protection, uses water as the dispersion medium, and has little smell and no staining, thus ensuring the safety during storage, transportation and use.