Reference suggestions
. In the case of production and construction at the same time, the construction environment must have sufficient isolation areas to prevent dust, sand, etc. from penetrating into the wet paint film epoxy floor.
. Areas that are easily contaminated and more conspicuous facades should be cleaned with a wide cloth mop once a day.
.If there are coarse and hard sand and mud on the ground, they should be cleaned up in time to prevent the sand from grinding the ground and reducing ground wear.
. Employees should change to soft-soled shoes before entering the clean area. Plastic blankets should be installed at the junctions and entrances and exits where sand and mud are easily introduced to facilitate employees to remove debris from the soles when entering and exiting.
.When unloading forklifts and forklifts, pay attention to placing the goods flat to avoid scratching the ground due to side loading or dragging of the goods.
. Try to avoid braking when vehicles, forklifts and forklifts are running.
. Areas that frequently seep and leak oil should be cleaned frequently with sawdust to prevent the oil from denaturing and adsorbing the ash layer to become stubborn stains. For large oil-soaked areas, use a wide cloth mop to push the sawdust around to absorb the oil from the floor.
.Try to avoid hitting the ground with machine repair tools.
.If there is any large damage to the paint film, report it for repair in time so that repair work can be carried out before the oil stain penetrates into the foundation. When washing the floor with water in the workshop, avoid depositing the oil-water mixture in deeply damaged areas.
.
Acceptance criteria.
When the ambient temperature is ℃, the construction should be done the day after tomorrow, that is, the hardness should reach about % of the completed curing
There should be no stickiness on the surface
/> , bubbles: flat coating type, mortar type without bubbles, self-leveling allows small bubbles per square meter
, good leveling, no trowel marks, large area interfaces are basically flat
, no floating The color is bright and uniform. Very inconspicuous color differences are allowed at large-area interfaces
. No coarse impurities, but minimal defects caused by falling dust in the air are allowed
. Floors The surface should be flat and smooth, and the glossiness should meet the design requirements (high gloss, glossy, semi-gloss~). The flat coating type should be glossy, and the water-based type should be semi-glossy~matte
. The anti-slip surface effect of orange peel and mortar should be It is clear.
Water-based floor
Advantages of water-based epoxy floor
Water-based epoxy resin has outstanding performance advantages, so that the prepared water-based epoxy resin coating also has excellent performance, so that it can be used in Water-based products are becoming more and more important in the family. Experts believe that water-based epoxy resin has a very bright future in today's environment of environmental protection.
Water-based epoxy resin refers to a stable dispersion system in which epoxy resin is dispersed in the form of particles or droplets in a dispersion medium with water as the continuous phase. Since epoxy resin is a thermosetting resin with a linear structure, a water-based epoxy curing agent must be added before construction. A chemical cross-linking reaction occurs at room temperature. After curing, the epoxy resin changes its original soluble and fusible properties. It forms an insoluble and infusible spatial network structure, showing excellent performance. In addition to the many advantages of solvent-based epoxy resin coatings, water-based epoxy resin coatings have strong adaptability, extremely high adhesion to many substrates, and the cured coating film is corrosion-resistant and chemical-resistant. Excellent performance, small shrinkage of the coating film, high hardness, good wear resistance, excellent electrical insulation properties, etc.
Secondly, it has good environmental protection performance, and it also contains no organic solvents or low volatile organic compound content, and will not cause Air pollution, thus meeting the current requirements for environmental protection
The third is truly water-based, using water as the dispersion medium, low price, odorless, non-flammable, and the safety during storage, transportation and use is also greatly improved
Water-based epoxy resin coatings with different properties can be prepared by rationally selecting epoxy resin base materials, curing agents, and various modifiers and additives. The many performance characteristics of water-based epoxy resin coatings determine that they have wider application prospects than solvent-based or solvent-free epoxy resin coatings. Experts from the China Epoxy Resin Industry Association said that the current application of water-based epoxy resin coatings mainly includes the following aspects: First, industrial floor coating, which can be used as a high-performance environmentally adaptable floor coating to replace solvent-based epoxy resin coatings , can also be mixed into cement mortar as a polymer component to make high-performance polymer mortar floor materials. The third is wooden floor coating, which can be formulated into varnish for wooden floors, replacing the solvent-based polyurethane crystal floor paint widely used in the market. The formulated colored paint can replace solvent-based epoxy resin and polyurethane enamel paint and is used in kitchens, furniture and mechanical equipment. Fourthly, it is impermeable in construction projects. With the help of the excellent mechanical properties of water-based epoxy resin paint and its good compatibility with cement, it is prepared High-strength concrete, in which water-based epoxy resin coating is added as an auxiliary component to concrete or cement mortar, and can improve the impermeability of concrete. Fifth, building bonding and waterproofing, using epoxy resin to bond cement materials and many organic materials well. As well as the excellent mechanical properties and chemical resistance of epoxy resin itself, it can be used as a concrete adhesive and waterproof plugging material. Sixth is anti-corrosion treatment and other uses. The excellent corrosion resistance of epoxy resin can be used as an anti-corrosion coating for steel and steel. The anti-corrosion primer of ships can be used in conjunction with other general-purpose emulsions such as polyacrylic acid emulsion and water-based polyurethane to achieve a synergistic effect to obtain coatings with different properties.
Room temperature curing water-based epoxy resin coating systems are generally divided into four categories: Type I water-based epoxy resin system, which is composed of low molecular weight liquid epoxy resin (epoxy equivalent is around) and water-based epoxy curing agent. The epoxy resin in this type of system is generally not emulsified in advance, but is mixed and emulsified by the water-based epoxy curing agent before use. Therefore, this type of curing agent must be both a cross-linking agent and an emulsifier, which can be well dispersed or dissolved in In water, it has a good emulsification effect on low molecular weight liquid epoxy resin, and can be formulated into zero paint. The hardness of the coating film increases rapidly. The Type II water-based epoxy resin system is composed of high molecular weight solid epoxy resin emulsion and water-based epoxy. Curing agent composition: Since the reactivity of high molecular weight epoxy resin is lower than that of type III water-based epoxy resin, the pot life of type II water-based epoxy resin system is longer than that of type I, and the drying time of type III water-based epoxy resin is shorter than that of type I. The system consists of a low molecular weight liquid epoxy resin emulsion and a water-based epoxy curing agent. The new reactive epoxy resin emulsifier contains both surface-active segments (hydrophilic segments) and epoxy resin segments ( lipophilic chain segment), which greatly improves the compatibility between the emulsifier and the epoxy resin. It can prepare a low molecular weight liquid epoxy resin emulsion with an average particle size of the dispersed phase of about ~, and at the same time has a certain toughening effect on the coating film IV Type water-based epoxy resin system consists of water-based epoxy resin emulsion and polyurethane-modified epoxy curing agent. Use an appropriate amount of polyurethane-modified epoxy resin to obtain a polyurethane-modified epoxy curing agent with good comprehensive performance, and use it to cure Waterborne epoxy resin emulsions to improve the performance of waterborne epoxy resin coatings.
Curing effect is an important indicator for measuring water-based system products. The curing film-forming mechanism of water-based epoxy resin system Water-based epoxy resin coating is an emulsion coating. Its film-forming mechanism is very different from that of general polymer emulsion coatings such as acrylic emulsion. At the same time, it is different from solvent-based epoxy. The film formation of resin coatings is also not exactly the same. For water-based epoxy resin coatings, whether the curing is sufficient mainly depends on the following two factors: First, the particle size of the epoxy resin dispersed phase particles. Under the condition of ensuring the same amount of water-based epoxy curing agent, the epoxy resin dispersed phase particles When the particle size is small, the concentration of the curing agent on the surface of the particles is relatively moderate, the surface curing speed is slow, and the curing agent molecules have enough time to diffuse to the entire epoxy resin dispersed phase particles to completely cure them, so a uniform and complete curing can be achieved. The second coating film is the compatibility of the epoxy curing agent and the epoxy resin. Improving the compatibility of the epoxy curing agent and the epoxy resin is beneficial to the stability of the system after the water-based epoxy resin emulsion is dispersed, and the two The better the compatibility, the easier it is for the epoxy curing agent to diffuse into the epoxy resin particles, which is beneficial to the curing reaction.
Two-component reactive coatings all have a pot life problem. Since the curing and film-forming mechanisms of water-based epoxy resin systems and solvent-based epoxy resin systems are different, the criteria for judging the pot life are not exactly the same. For solvent-based epoxy resin systems, the viscosity of the system continues to increase with the extension of storage time, so the pot life of the system can be expressed by the change in viscosity over time, that is, from the time when the two components are mixed until the viscosity of the system increases to the point where it cannot be Construction time. However, for water-based epoxy resin systems, the change in viscosity of the system over time cannot be used to judge. The epoxy resin emulsion and the corresponding varnish will show thixotropy and pseudoplasticity, which is a typical water-dispersed system. The viscosity changes of the system after the two components of the water-based epoxy resin coating are mixed are relatively complex. The viscosity of some systems gradually increases with the extension of the storage time, while the viscosity of some systems decreases rapidly after the two components are mixed, and remains stable for a long time. It remains basically unchanged over time.
Forms of water-based epoxy
Resin can form three water-dispersed forms through different water-based pathways: water-soluble micelle dispersion emulsion.
Epoxy resin itself has a thermoplastic linear structure. After being heated, the solid state changes to a liquid state, and the high viscosity changes to a low viscosity. It has practical value only when used in conjunction with a curing agent (pure one-component water-based epoxy systems are also Latent curing agent needs to be added). Therefore, the water-based epoxy system should include water-based epoxy resin and water-based epoxy curing agent. Similarly, they can form three water-dispersed forms through different water-based pathways.
Therefore, the water-based epoxy system has more selection combinations (theoretically, it has various morphological combinations), but it also increases the difficulty of selection. At the same time, in the actual application process, by adding a large amount of pigments, fillers, additives, etc., the application performance of the water-based epoxy system is improved, and the shortcomings and even serious defects of the water-based epoxy system are also covered up, which will increase more uncertain factors and complexity. sex.
Abandon complexity and simplify, while focusing on the form of water-based epoxy resin and water-based epoxy curing agent respectively, we can achieve faster and better selection of water-based epoxy systems by controlling the nature of water-based epoxy and the evaluation of water-based epoxy. , lay a solid foundation for your tall building!
Contact: Tang Min, Tel:
Chongqing factory garage epoxy resin floor paint