There was no epoxy floor sealant at first. Until the middle of last century, many factories and workshops in Europe and America suddenly sprang up a kind of clean floor. Compared with ordinary floor, this kind of floor has obvious advantages, clean and easy to clean. And wear-resistant, long-term use. It mainly uses a monolithic polymer surface layer, later known as the epoxy floor. Up to now, epoxy floor sealant is widely used in building materials. 环氧地坪密封固化剂有哪些优势呢？
What are the advantages of epoxy floor sealant curing agent?
1. Excellent adhesion: Epoxy floor coating has many hydroxyl and ether bonds, so it can adsorb with the base material. Moreover, the volume shrinkage rate of epoxy resin curing is low (only about 2%), so the film has excellent adhesion to metal (steel, aluminum), ceramics, glass, concrete, wood and other polar substrates.
2. Good chemical resistance: epoxy resin has only alkyl and ether bonds, no ester bonds, so alkali resistance is particularly prominent, general oil or alkyd rust-proof primer. When corroded, the cathode is alkaline and will be destroyed by saponification. Epoxy floor coatings are alkali-resistant and have good adhesion, so they can be widely used as anticorrosive primers. Because of the three-dimensional network structure of epoxy floor coating after curing, it can also resist oil impregnation, and can also be widely used for anti-corrosion of tank, oil tanker, integral fuel tank lining of aircraft, etc.
3. Good toughness: Compared with thermosetting phenolic resin coatings, epoxy floor coatings contain aromatic rings and are hard, with ether bonds to facilitate the rotation of molecular chains, and have certain toughness, unlike phenolic resin, which is brittle (because its crosslinking spacing is shorter than epoxy resin). The longer the crosslinking distance of epoxy resin is, the easier the internal rotation is. The larger the molecular weight of epoxy resin, the larger the crosslinking distance is.
4. Epoxy resin has a certain wetting force on wet surface. Especially when polyamide resin is used as curing agent, it can be made into underwater construction coatings, which can squeeze out the water on the surface of objects, and can be used for emergency repair of underwater structures and anti-corrosion construction of underwater structures.
5. Epoxy resin has low molecular weight. It can cooperate with various curing agents to produce solvent-free, high solid powder coatings and water-borne coatings. It meets the requirements of environmental protection and can obtain thick film coatings.
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