Types Of Paints

Characteristics and use of hardeners for colorants

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The modern market offers a wide variety of hardener additives to dyes. However, many people underestimate the importance of such substances. Therefore, let's continue in this article, we'll talk about the role of the hardener for different types of paint.

  • General characteristics of the material
  • Classification of curing agents for coloring compounds
  • What paint materials require a hardener
  • How to use this tool in practice?
  • How much hardener should I add to the paint?

General characteristics of

Many varnishes and paints are hardened due to evaporation of the liquids that make up their composition. But there are such paint and varnish materials and epoxy resins that are unable to harden by themselves. To achieve this, special polymerizing agents must be used. They stimulate the process of polymerization, which people actively use when creating different kinds of compositions, as well as other decorating and building purposes. Painting with the use of such substances lasts longer.

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Such substances are called hardeners and are often used in the construction and finishing of buildings for various purposes.

However, you should not think that this is a catalyst for a chemical reaction, because it is its full participant. It merges with matter, giving it a stable structure.

Classification of hardeners for coloring formulations

Painting with many formulations without a special curing agent will be short-lived. But how to understand what kind of substance should be applied in a particular case? For this it is necessary to study their types.

The main characteristics of such additives are largely determined by their chemical composition. And different types of this substance have different conditions of curing and durability. Accordingly, their scope of application is different. For each type of epoxy resin, a certain type of curing agent must be used.

Specialists divide hardeners into two groups:

  1. Directly hardeners, which are part of two-component paints. They activate the polymerization of epoxy resins. And while they are not added to the coloring composition, it can be stored for a very long time;
  2. Desiccants are additives capable of accelerating the solidification of single-component materials. The presence of such substances is an obligatory condition only for oil paints.

Driers supply oxygen to the film thickness, which accelerates the oxidation process, and as a consequence, polymerizes a one-component paint.

Painting not only dries faster, but it also becomes more durable. Often, the most desiccant is present in ready-made paints, and this content is a maximum of 5%.

What paint and varnish materials need a hardener

Experienced specialists distinguish such classes of the most common paints that require the use of chemical hardeners:

  1. Painting with enamels and varnishes, which are based on epoxy resins. The advantages of such compounds are called exceptional strength and high resistance to wear. They are used quite widely. For example, to create protection of metal structures from corrosion, as well as to restore enamel on cast-iron baths.
  2. Epoxy paint is a two-component paint used for concrete structures.
  3. Varieties of polyurethane paint, which are very resistant to mechanical stress and are elastic.
  4. Some types of acrylate two-component paint.

How to use this tool in practice?

Each substance manufactured by the factory method contains instructions for use. Following this detailed document, you can learn how to use a hardener in the right way and in the right case.

In cases of using the means for acrylic paint, the dosage of the components can be one, but for a different color composition, it is quite different.

The technology itself boils down to the addition of a hardening agent in the paint right before it, so the painting will be carried out. And the resulting material must be mixed in the most careful way. For this purpose, you need to use a drill with a special nozzle.

After the coloring compound is prepared( mixed with the curing agent), it should be used within the next 5 hours. After the expiration of this time interval, the material will become unusable.

How much hardener should I add to the paint?

It is extremely important to observe the dosage of the formulation recommended by the manufacturer and choose its current type. Often, the ratio of the coloring base and curing components in different cases can vary from 5 to 25%.And here it is important not to be mistaken. After all, with household use of hardeners, it is easy to make a mistake, which can affect the final quality of the product.

So the homogeneity of the paint or varnish layer can change, it can become cloudy, less firm and durable. The painting in this case will be unsightly and not durable.

If the hardener is not sufficient in the colorant, it will dry very long. The strength of the paint may not be high enough. If it is too much, the painting will be fragile and will soon crack.

If in your plans there is painting with such compounds that require the use of hardener, then you need to choose the latter very carefully. Carefully study the properties of the chosen paint and select the actual curing additive for it so that the result is attractive and durable.

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