What is Aqueous Epoxy? Difference Between Waterborne Epoxy and Oily Epoxy

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 a continuous phase. Because epoxy resin is a thermosetting resin with linear structure, water-based epoxy curing agent must be added before construction, and chemical cross-linking reaction occurs at room temperature.

Water-based epoxy floor paint is an epoxy resin floor material with water as the dissolved substance, which has the characteristics of environmental protection and wear resistance.

Hello. 1. The epoxy resin itself is a thermoplastic linear structure, and the solid state becomes liquid after heating, and the high viscosity becomes low viscosity.

Curing agent. It has practical value when used together.

Pure one-component.

Water-based epoxy. The system also needs to add a latent curing agent). Therefore, the aqueous epoxy system should contain:

Water-based epoxy resin.

And. Water-based epoxy curing agent.

Similarly, they can form three forms of water dispersion through different water-based pathways.

2. Water-based epoxy: the resin can form three water-dispersible forms through different water-based pathways: water-soluble; Micellar dispersion type; Latex.

3. Water-based epoxy is a multiphase system, epoxy resin and curing agent.

Dispersed phase. The form is dispersed in the aqueous phase, and the cross-linking curing process is the interpenetration and internal diffusion cross-linking reaction process between particles in the process of water evaporation, so the degree of curing of aqueous epoxy depends on the following four factors:

a) Compatibility: The better the compatibility between water-based epoxy resin and water-based epoxy curing agent, the more conducive to the internal diffusion of curing agent particles and epoxy resin particles and the curing reaction is conducive to the progress of curing reaction;

b) Particle size: when the particle size is small, the dispersed phase particles of water-based epoxy resin and water-based epoxy curing agent can fully penetrate into the core to achieve a more complete degree of curing;

c) Hydrophilic and lipophilic balance value: The hydrophilic and lipophilic balance value of water-based epoxy resin and water-based epoxy curing agent is close to each other, and the coexistence in the aqueous phase is consistent.

Steady state, if the difference is large, hydrophilic.

The stronger components will gradually accumulate in the aqueous phase, resulting in the separation of the resin phase and the curing agent phase;

d) Uniformity of dispersion: In the state of multiphase separation, only through a certain number of .

Mechanical agitation. action, in order to be the resin phase and the curing agent phase.

Uniform distribution. in the aqueous phase;

Epoxy is very important to stir and mix evenly in the application) (some friends think that as long as they simply stir or even do not stir in the process of using oily epoxy, they can do it.)

Film formation, in fact, there is a big misunderstanding, because the oily epoxy used is dissolved by solid epoxy, such as 75% E 20, even if the reinforcing agent is not reinforced, the solvent can form a very hard after volatilization.

Dry film. state, but this dry film is not cross-linked and cured by the curing agent, and becomes liquid after heating, and the dry film has no performance at all).

Jinan Jin Shunyu water-based epoxy resin usually refers to the emulsion, aqueous dispersion or aqueous solution formed by epoxy resin dispersed in the aqueous phase in the form of particles, droplets or colloids, and the difference between the three is that the particle size of the epoxy resin dispersed phase is different.

I'll have to find someone to help you.

Water-based epoxy is a main component is epoxy resin, and B component is water, which is a material cured with water, I have used yeart water-based epoxy, you can try it.

The main difference between water-based epoxy resin and ordinary oil-based epoxy.

1. In the water-based epoxy system, the water-based epoxy resin is generally made of ordinary standard oily liquid or solid epoxy resin grafting, emulsification, etc., and the emulsion form of about 50 solid parts is used as a commodity**. Generally, water-based epoxy resin emulsions are used directly as part B on site, and do not need to be diluted, nor do they need to grind, color, or add additives to the emulsion.

2. There are many varieties of water-based epoxy resin curing agent, and the performance of the curing agent determines the performance of the final epoxy resin composition. The proportion of water-based epoxy curing agent is larger than that of resin, the molecular weight of the curing agent is more than several thousand, and the active groups that can participate in the cross-linking reaction in each molecular chain segment are more than 6-7. Therefore, the curing composition of water-based epoxy resin has higher cross-linking density and hardness, faster curing speed and better toughness.

3. The curing agent of water-based epoxy resin is usually an aqueous solution of epoxy polyamine adducts with high viscosity, transparency, homogeneity and light color. Paintmaking, color mixing, and adding additives are generally carried out in water-based epoxy curing agents. Part B can be directly packaged with water-based epoxy resin emulsion.

If the standard oily liquid 128 epoxy resin is used for component B, the viscosity should be appropriately reduced with an active epoxy diluent in advance.

Fourth, compared with ordinary oily epoxy resin compositions, the release of water is the main problem of waterborne epoxy, especially for thicker coatings or filler layers. In the oily system of thicker coatings, the poor release of solvents or the eventual residue will affect the hardness of the coating, and the solvent will remain in the coating for a long time. The waterborne epoxy resin system is different, and most of the water is required to volatilize before curing into a film, otherwise it is easy to have coating pathologies, such as cracking and warping.

Epoxy paint is a very important type of coating in industrial anti-corrosion, with epoxy resin as the main film-forming substance, the coating structure includes primer, intermediate paint and topcoat, with anti-corrosion, acid and alkali resistance, water resistance, oil resistance, strong adhesion and other good characteristics, after the adjustment of the formula has a variety of different branch products.

Epoxy paint is mainly used in steel structures, machinery, equipment, pipelines, chemicals, storage tanks, bridges, vehicles and other industries, according to the construction requirements, epoxy paint can be divided into two categories: watery and oily, so what are the differences in construction methods and product characteristics?

Water-based epoxy paint is made of water as a diluent, which has little pollution to the environment, low volatile content in agricultural production system, non-flammable and non-explosive, and low risk factor. During the construction of the water drying slowly, it also leads to the drying of the paint film is slower than the oil-based paint, and in the low temperature environment, especially at minus degrees Celsius, it is not suitable to use water-based epoxy paint, too low temperature makes the paint freeze and cannot be dried, so the construction can not be carried out below 0.

Oil-based epoxy paint needs a special epoxy diluent, which is volatile, has a reactive odor, and cannot be exposed to open flames. The role of the thinner is to adjust the viscosity and increase the leveling, so it will not become part of the paint film and all volatilize into the air, which also increases the cost of the paint. Oil-based epoxy paint dries slowly below 5, and a special low-temperature curing agent can be used, and the solvent volatilization below 0 is very slow, and it is not recommended to carry out construction.

First, from the formula.

The water-based epoxy resin and the supporting water-based epoxy resin curing agent have completed the complete use of water as the dilution component, without solvent and co-solvent, non-toxic, tasteless and non-residue, which completely solves the defects and deficiencies of the above-mentioned oil-based epoxy resin system. Over the years, with the advancement of skills, water-based epoxy resins have achieved comprehensive development in all aspects, and the inductive function has reached or exceeded the usual oil-based epoxy products.

Second, the essence of the material.

From the system, the water-based and oil-based systems are completely different, and the essence of the product is still epoxy resin, so it is produced in the water-based epoxy resin and water-based epoxy curing agent raw materials in the water-based and oil-based series of products as epoxy resins; processing and manufacturing of coatings, adhesives and other commodities; Painting and construction of finished products; After all, there are many differences in the materialization and function of commodities, or even complete opposites.

3. Product characteristics.

In the water-based epoxy system, the water-based epoxy resin is usually made into a water-based epoxy resin emulsion by grafting and emulsifying the usual oily liquid or solid epoxy resin, and the emulsion is roughly 50% solid as a commodity**. Generally, water-based epoxy resin emulsions are used directly as B components in the field, and do not need to be diluted, nor do they need to grind, color, or add additives in the emulsion.

Fourth, the properties of the two materials.

There are many types of water-based epoxy resin curing agents, and the function of the curing agent determines the function of the epoxy resin composition after all. The increased share of water-based epoxy curing agent is larger than that of resin, and the molecular weight of the curing agent is more than several thousand, and the active groups that can participate in the cross-linking reaction in each molecular chain segment are more than 6-7. Therefore, the curing composition of water-based epoxy resin has higher cross-linking density and hardness, faster curing speed and better resistance.

5. The physical properties of the two materials.

The curing agent of waterborne epoxy resin is usually an aqueous solution of epoxy polyamine adduct with high viscosity, brightness, homogeneity and light color. Lacquer making, color toning, and additives are usually carried out in water-based epoxy curing agents. Component B can be directly packaged with water-based epoxy resin emulsion.

If the standard oily liquid 128 epoxy resin is selected for component B, the viscosity should be appropriately reduced with an active epoxy diluent in advance.

Sixth, the quality of the two materials.

Compared to the usual oil-based epoxy compositions, the release of water is the primary concern for water-based epoxy, especially with regard to thicker coatings or filler layers. In the oily system of thicker coatings, the poor release of solvents or the eventual residue will affect the hardness of the coating, and the solvent will remain in the coating for a long time. The water-based epoxy resin system is different, requiring most of the water to evaporate before curing into a film, otherwise it will simply present a sick coating state, such as cracking, warping, etc.

First, the solvent is different, and the water-based is environmentally friendly.

Water-based epoxy flooring uses water as the solvent, and during the curing process, water vapor is volatilized into the air.

Oily epoxy flooring uses xylene, acetone, etc. as solvents, and during the curing process, it is xylene, acetone and other polluting gases that volatilize into the air.

Second, the use of the environment.

Water-based epoxy flooring can be used in a humid and humid environment without bubbles falling off. (A dry environment is still required during construction.)

Oily epoxy flooring can not be used in a humid, damp environment, and it will blister and fall off after a long time in a damp environment.

Many people choose water-based epoxy coatings when choosing coatings, but they don't know the meaning of water-based epoxy coatings, and they don't know what its special features are, so what is water-based epoxy coatings? What are the features? Let's introduce it to you.

What is a water-based epoxy coating?

Water-based epoxy coatings are coatings that use water as a solvent or dispersion medium. Water-based epoxy coatings include water-soluble epoxy coatings and water-emulsified coatings. Water-soluble coatings are often also known as electrophoretic coatings, that is, the resin is dissolved in water to form a uniform colloidal solution, if the resin ions are charged, under the action of direct current, colloidal particles can be discharged and deposited on the surface of the workpiece by electrophoresis.

What are the characteristics of water-based epoxy coatings?

Water-based epoxy coatings save resources and reduce pollution Water-based epoxy coatings use water instead of organic solvents. Water-based epoxy coating water is extensive, can save a lot of resources, in the production, transportation, coating process, basically no pollutants, no fire risk, so it is beneficial to protect the ecological environment.

After the surface of the coated object of the water-based epoxy coating is degreased, rusted and phosphated, it can be painted without being completely dry. When the electrodeposition construction of water-based epoxy coatings is adopted, there are stricter requirements for the surface treatment of the coated objects. Construction equipment and tools can be cleaned with water.

The electrophoretic coating of water-based epoxy coating adopts the automatic electrodeposition construction method, and the coating efficiency is higher than that of spraying, brushing, drenching, dipping and other construction methods, and the coating quality is stable and there are fewer drawbacks; Other water-based epoxy coatings can be sprayed, brushed, soaked and other construction methods.

There are a large number of hydrophilic groups in waterborne epoxy coatings, and efforts should be made to improve the corrosion resistance of the coating film. Water-based epoxy coatingsFor water-based epoxy coatings that are dry at room temperature, effective measures should be taken to ensure that the water in the coating film is released within the specified time. This is a topic of concern in the formulation design, production and coating of waterborne epoxy coatings.

We understand that water-based epoxy coatings can be used boldly and confidently, water-based epoxy coatings are not pollutant in the process of use or transportation, and there is no danger of fire, which is conducive to protecting the ecological environment.

Water-based epoxy products have the following advantages over ordinary oil-based epoxy:

1. More environmentally friendly.

2. Good toughness, not easy to crack.

3. The construction is simple.

Water-based epoxy flooring is suitable for all kinds of workshops, warehouses, parking lots, and the ground without moisture-proof layer on the first floor, especially suitable for food factories, pharmaceutical factory workshops and warehouses and other places, the paint film is non-toxic, and there is no pollution to food and drugs during the coating process.

Product features: 1. Water is used as a dispersed medium, which is environmentally friendly and healthy, and can be used in relatively closed and used at the same time as the construction needs of the place for construction.

2. Non-toxic, food-grade coating, only containing silicon, oxygen, aluminum and other inorganic components and no heavy metals.

3. It has the characteristics of high temperature resistance, smokeless and non-combustible. It has a strong fire protection effect on buildings.

4. Low requirements for the moisture content of the foundation.

5. The surface tension is low, the surface dirt is easy to clean, and the water vapor is permeable in one direction.

6. It can form a surface hardness of more than 4h, and has strong scratch resistance.

7. The product can react with the foundation cement to form an overall floor system, which is non-foaming and non-delamination, so that the floor system can be used more durably.