Polyester paints. Types, methods of application. Electrostatic and tribostatic spraying

Polyester paints. Types, methods of application. Electrostatic and tribostatic spraying Polyester paint or epoxy-polyester powder paint is a pigmented dispersed system that contains solid particles, due to which it it is evenly distributed over the painted surface and creates a protective layer.

These paints serve as an excellent protector of metal against corrosion and at the same time, giving such designs aesthetics. In this article we will tell you about the types, composition and methods of applying polyester paints.

Concept. Polyester paint is used for painting iron, plastic, ceramic surfaces, wood, etc. Such a coating serves as an excellent protection against corrosion, mechanical stress, and the effects of chemicals.

It is used to cover agricultural implements and equipment, metal entrance doors, building facade elements, as well as other products that are constantly exposed to atmospheric precipitation.

Composition

Polyester paintwork is made by mixing the components and their further homogenization in a special twin-screw extruder under high temperatures. Next, the alloy is cooled, then it is crushed and sieved. This makes the mixture homogeneous. Such structures contain a film-forming resin, a hardener, various pigments and additives.

The role of fillers and pigments is to improve the properties of the composition and the surface to be coated. For example, by adding them in different proportions, you can adjust the properties of the composition in terms of electrification, resistance to temperature fluctuations, electrical conductivity, strength, etc.

Note : If metal powder is used as filler, a simulated metal surface can be created.

Polyester paints. Types, methods of application.</p><p> Electrostatic and tribostatic spraying

Without the use of substances such as pigments, fillers, the surface to be coated will be transparent ...

The plasticizers included in the composition reflect the physical and mechanical characteristics of the material. The temperature and time of film formation depend on them. They should in no way violate the aggregate properties of polymers, affect the deterioration of technological characteristics, or interfere with the film formation process.

The properties of the material are also improved through the use of modifying agents. However, physical modification is widespread due to various film-forming additives.

With the use of modifiers, it is possible to change the characteristics from the technological side, namely, the properties of the viscosity of the alloy, the flow characteristics, etc.

Adsorbents are needed for thermoactive film-forming paint materials. Appropriate accelerators are used to speed up the process. Their activation is carried out when high temperatures are reached, when the curing process begins to start after the film former melts and a liquid film is formed.

The curing system is the most important component of thermosetting paint.

In addition to stability and curing conditions, the performance of the coating also depends on it.

The additives are used to improve the weather resistance of the material. They reduce the photodegradation of polymers by ultraviolet rays. This also includes resistance to temperature fluctuations, free-flowing qualities of the composition, etc.

Details

Types

Now powder paint is widely used, which contains film-forming hardeners, which are of two types:

  • Polyester;
  • Epoxy - polyester.

The composition of the first type contains a powdery mixture with high dispersion, consisting of additives, pigments and polyesters. It is worth noting that there is no epoxy resin and thinner in this type of solvent and epoxy resins.

Low-toxic, can be used for painting sports equipment, car parts, etc. Designed specifically for metal elements that are regularly exposed to atmospheric conditions such as precipitation and temperature fluctuations.

There are two methods of application: electrostatic and tribostatic.

The advantages include chemical resistance, fast drying, hiding power.

The powder has a homogeneous structure, because the cooled melt is subjected to grinding and sieving. In addition to metal structures, this paint can also be used to coat plastic and wood. Safe paint with good protective properties, it also has an economical consumption.

A feature of this material is its decorative effect, wide color palette, resistant to chemicals, good application density, and good adhesion.

Epoxy polyester paints are composed of resin, hardening materials, fillers and pigments. Most of them are resins, where the percentages are from fifty to seventy. This material is produced for interior work.

Note : LMCs are still called hybrid.

The unique properties of powder enamels are impact resistance, elasticity, resistance to various kinds of solvents, as well as good spreading ability.

It is used for painting metal surfaces of household appliances and electrical appliances, car parts, etc.

Such a composition serves as an excellent protection against corrosive formations, withstands temperature fluctuations in temperature and does not lose its brightness.

Epoxy paints are considered versatile. It can be used for both outdoor and indoor work. They perfectly combine physical, mechanical and electrical insulating qualities.

They have good adhesion and are resistant to chemicals. Resistant to alkali, fuel, oil, water. Therefore, they can be used to protect the pipeline inside and outside.

Application methods

Can be applied in two ways: electrostatic spray or tribostatic spray.

Important : When working with such compounds, it is necessary to observe work in protective equipment and be extremely careful.

Stages painting:

Conclusion

These LMBs have many advantages. They do not lose color over time, have good indicators of resistance to mechanical stress, are absolutely safe for human health and the environment, because they do not contain toxic substances. This coating will last a long time.

It is not flammable. Among other things, it is also an aesthetic appearance with minimal consumption.

There is no need to apply any special care to the polyester coating. They can be cleaned with absolutely any chemical means due to their chemical resistance.

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