Waterborne epoxy floor principle Waterborne epoxy floor features

The water-based epoxy floor is suitable for places where odors are required during construction on the first floor or basement floor where there is no construction waterproof layer, especially for the food and drug industry. So, what are the characteristics of waterborne epoxy floor ? What is the principle? Let's learn together soon.

[Waterborne epoxy flooring introduction]

Aqueous epoxy resin refers to a stable dispersion system in which an epoxy resin is dispersed in the form of fine particles or droplets in a dispersion medium having water as a continuous phase. Curing effect is an important indicator for measuring water-based system products. Curing mechanism of waterborne epoxy resin system Waterborne epoxy resin coating is a kind of emulsion coating. Its film formation mechanism is very different from that of general polymer emulsion coatings such as acrylic emulsion, and it is also related to solvent epoxy. The film formation of the resin coating is also not exactly the same. For aqueous epoxy resin coatings, whether or not the curing is sufficient mainly depends on the following two factors: First, the particle size of the epoxy resin dispersed phase particles, in the case of 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 particle surface is relatively moderate, the surface curing speed is slow, and the curing agent molecules have enough time to diffuse the entire epoxy resin dispersed phase particles, so that the curing is complete, and thus, uniform and complete curing can be formed. The second is the compatibility of the epoxy curing agent and the epoxy resin, and the compatibility between the epoxy curing agent and the epoxy resin is improved, which is favorable to the stability of the aqueous epoxy resin emulsion after dispersion, and both The better the compatibility, the more easily the epoxy curing agent diffuses into the interior of the epoxy resin particles, which is favorable for the curing reaction.

[Waterborne epoxy floor principle]

Two-component reactive paints have a problem of pot life. Because the curing mechanism of aqueous epoxy resin system and solvent epoxy resin system is different, the criterion for the pot life is not exactly the same. For the solvent-based epoxy resin system, the viscosity of the system increases with the extension of the shelf-life, so the pot life of the system can be expressed as the viscosity changes with time, that is, from the mixing of the two components to the increase in the viscosity of the system. Construction time. However, the waterborne epoxy resin system can not be judged by the change of the viscosity of the system with time. The epoxy resin emulsion and the corresponding varnish show thixotropy and pseudoplasticity, which are typical aqueous dispersion systems. The viscosity change of the two components of the waterborne epoxy resin coating after mixing is more complicated, and the viscosity of some systems gradually increases with the extension of the shelf time, while some of the viscosity of the system rapidly decreases after the two components are mixed, and is longer The time remains basically unchanged.

[Waterborne epoxy flooring features]

Since the epoxy resin is a thermosetting resin with a linear structure, an aqueous epoxy curing agent must be added before the application, and a chemical crosslinking reaction occurs at room temperature. After the epoxy resin is cured, the original soluble and fusible properties are changed and changed. Insoluble and infusible space network structure, showing excellent performance. Apart from the many advantages of solvent-based epoxy resin coatings, waterborne epoxy resin coatings have strong adaptability, high adhesion to many substrates, and excellent corrosion resistance and chemical resistance after curing. Small film shrinkage, high hardness, good wear resistance, excellent electrical insulation properties, etc.; Second, good environmental performance, but also has no organic solvent or low volatile organic compounds content, will not cause air pollution, and thus meet the current environment The requirements for protection; Third, the real water based, water as a dispersion medium, low price, odorless, non-combustible, storage, transportation and use during the safety is greatly improved; Fourth, good operation, waterborne epoxy resin coating The construction operation performance is good, the construction tools can be directly cleaned with water, can be cured at room temperature and in a humid environment, have a reasonable curing time, and ensure a high cross-link density. This is unmatched by the usual waterborne acrylic coatings and waterborne polyurethane coatings.