Since the middle and late last century, many clean workshop floors have appeared in Europe and the United States. It uses an integral polymer surface layer, called "epoxy flooring". The main component is anticorrosion Resin (vinyl resin) and curing agent. Shangwei Anti-corrosion Resin (Vinyl Resin)
Since the main film-forming base material of anti-corrosion floor paint is anti-corrosion resin (vinyl resin), and anti-corrosion resin itself has thermoplasticity, it needs to react with curing agent or fatty acid, and cross-link to form a macromolecule of network structure. It becomes thermosetting, which shows various excellent properties. There are many anticorrosive floor coatings, each with its own characteristics.
1. Excellent adhesion: Anticorrosive floor coating has many hydroxyl and ether bonds, so it can be adsorbed with the bottom material. Moreover, the volume shrinkage of the anti-corrosion resin is low when cured (only about 2%), so the paint film has excellent adhesion to polar substrates such as metal (steel, aluminum), ceramics, glass, concrete, wood, etc.
2. Excellent chemical resistance: only anti-corrosion resins have hydrocarbon groups and ether bonds, and no ester bonds, so the alkali resistance is particularly prominent. General oily or alkyd antirust primers. The cathode site is alkaline during corrosion and will be destroyed by saponification. Epoxy floor coatings have alkali resistance and good adhesion, so they can be used as anticorrosion primers in large quantities. Because the anticorrosive ground paint is cured, it has a three-dimensional network structure and can be impregnated with oils. It can also be used in a large number of oil tanks, oil tankers, and aircraft fuel tank inner wall lining.
3. Good toughness: Compared with thermosetting phenolic resin coatings, anticorrosive floor coatings contain aromatic rings and are hard, with ether bonds to facilitate the rotation of molecular chains, and have a certain toughness, unlike phenolic resins that are very brittle (because their crosslink spacing is more anticorrosive Resin short). The anti-corrosion resin has a long cross-linking distance, which is convenient for internal rotation. The larger the molecular weight of the anti-corrosion resin, the larger the cross-linking distance.
4: Anti-corrosion resin (vinyl resin) has a certain wetting force on the wet surface, especially when polyamide resin is used as the curing agent, it can be made into an underwater construction coating, which can be coated by squeezing out the water on the surface of the object, and can be used for Repair of underwater structures and anti-corrosion construction of underwater structures.
5: The anti-corrosion resin (vinyl resin) itself is not high in molecular weight. It can be combined with various curing agents to produce solvent-free, high-solids powder coatings and water-based coatings, which meet environmental protection requirements and can obtain thick film coatings.
6: Anti-corrosion resin (vinyl resin) contains two active groups of anti-corrosion group and hydroxyl group. It can be combined with polyamine, polyamide resin, phenolic resin, amino resin, polyisocyanate, etc. to make a variety of coatings, which can be dried at room temperature , Cocoa baking at high temperature to meet different construction requirements.
7: Anti-corrosion resin (vinyl resin) has excellent electrical insulation properties and can be used for pouring and sealing, impregnating paint. Anti-corrosion resin has many advantages, but there are also shortcomings, and its photo-aging property is poor. The anticorrosive resin contains aromatic ether bonds, and the paint film is easily degraded and broken after being exposed to sunlight (ultraviolet rays), so outdoor weather resistance is poor. Therefore, the common bisphenol A anti-corrosion resin is not resistant to outdoor sunlight, the paint film is easy to lose light and change color, and then powdered, it is not suitable for outdoor topcoat.