The composition and scope of polyester paints, the rules for their application
Corrosion deteriorates the strength and condition of metal surfaces. After a while, they are completely destroyed. Polyester paints perfectly protect the metal from rust and help to give it an attractive appearance. They differ in their special composition and have a powdery consistency. In this case, it is important to choose the right substance and strictly follow the instructions for its application.
What is polyester paint
This paint is available in powder form. In this case, there are polyester and epoxy-polyester substances. The compounds contain film-forming resins. They also include pigments, hardeners. In addition, the formulations contain installation additives.
The distinctive characteristics of these formulations are as follows:
- homogeneity - the same type of substance;
- chemical and physical constancy;
- preservation of the consistency of the composition.
The production of polyester paints has a number of features. To do this, mix all the ingredients, then homogenize them. This is done under the influence of high temperature. A twin-screw extruder is used for the procedure.
The finished substance must be cooled, crushed and sieved. Thanks to this, it is possible to obtain a homogeneous structure.Such substances can only be applied to metallic coatings. Recently, however, began to appear powder materials intended for painting plastic and wooden surfaces.
Such substances are completely safe, have excellent decorative properties and have excellent decorative characteristics. Another advantage of coatings is considered economical consumption.
Painting is carried out in a special chamber, which allows 100% use of the material. The main characteristics of polyester dyes are as follows:
- excellent decorative properties - there is a huge variety of shades of such compositions;
- reliability - products of this category are distinguished by high chemical resistance;
- the ability to create a sufficiently thick layer of coating - this can be achieved literally in 1 coloring;
- absence of streaks when painting vertical surfaces;
- high adhesive characteristics.
Composition and characteristics of enamel
Polyester and epoxy polyester paints are solid dispersions. They include a number of components:
- film-forming elements;
- dryers - are hardeners that help speed up the drying process;
- pigments - substances are responsible for obtaining different colors;
- additives - give the dye excellent technical properties.
These dyes do not contain any solvent. They also do not contain epoxy. These substances belong to the category of thermosetting film-forming substances.
In the manufacture of such compositions under industrial conditions, all components are mixed under the influence of high temperatures. Then the finished mass is cooled and ground.After that, it is sieved. Due to this, a homogeneous powder is obtained at the output. The dispersion has homogeneous properties and physical and chemical constancy. It is also characterized by its stability during storage and use.
Apps
A polyester coating is used to paint the metal. It is often used in the automotive industry. Also, the composition is used for the manufacture of sports equipment, painting all elements of bicycles and power tools. It is also applied to garden and household appliances. Such substances provide reliable protection of coatings from negative external factors.
Advantages and disadvantages
How to paint correctly
At the stage of preparation for painting, it is necessary to clean the surface from rust, degrease it, apply a primer and dry it. After that, it is necessary to treat the surface with polyester paint. For this, it is recommended to spray the powder on the part.
Finally, thermal exposure is required. In this case, it is important to use temperatures of + 140-220 degrees. As a result, the coating melts and polymerizes. As a result, an elastic protective film appears on the surface of the material.
Manual powder application requires the use of a spray gun. After that, it is recommended to place the element in the chamber in which the heat treatment takes place. When automating the process, all steps are performed directly in the chamber. There are buzzards on its walls. Through them, the substance penetrates the surface to be painted.
Once the polymerization is complete, the product must be dried. When the required time has elapsed, the finished element is removed.
Storage conditions and periods
For storage of polyester dye, a temperature of +25 degrees is required. Under such conditions, the substance retains its characteristics for a long time and can be used for 1 year.
Analogs
Effective analogues of the substance include:
- Epoxy paints. Such agents are functional powder dyes. They are used for electrical insulation and corrosion protection.
- Hybrid substances. Epoxy-polyester products are considered yellow resistant compared to epoxies. In addition, the substances are characterized by excellent mechanical characteristics.
Comments
Many reviews of polyester dyes confirm their high efficiency.
Michael.
“I have been using such paints for metal surfaces for a long time. They reliably protect surfaces against corrosion and rust. A wide range of shades makes it possible to achieve the desired decorative effect. "
Andrei.
“Polyester paints are really an excellent choice. In order for the coating to lay flat, it is important to observe the technology of applying the substance. "
Polyester dyes are very effective and are used for application to metal surfaces. In order for the coating to be durable, it is important to follow a number of recommendations for applying the substance.