Alkyd urethane enamel

Appointment and application of enamels for wood

The tree, after prolonged exposure to various atmospheric phenomena (rain, snow), begins to gradually lose its visual appeal. Over time, cracks may appear on its outer part. In addition, if a tree is constantly exposed to moisture, then in this case fungi, moss and even mold can appear on it, which poses a considerable danger to human health.

The use of enamels to protect the facades of wooden buildings allows not only to protect wood from moisture and prevent its premature destruction, but also to eliminate or mask the negative consequences that appear on the surface of wooden buildings due to adverse weather conditions. For example, enamels for outdoor woodwork can not only significantly extend the period of operation of the structure, but also eliminate all the shortcomings that have appeared on the surface of the wood during its operation.

Enamel for wood makes it possible to mask and eliminate the loss of the natural shade of wood. In addition, the use of enamels prevents the occurrence of various cracks or even small deformations on the wood surface.

The main task of enamels and other paints and varnishes that are used to paint wood is to provide reliable protection of its surface and repel water. Also, enamels also have such useful properties:

1. Prevents drying out and cracking on the wood surface.
2. Scare away harmful insects.
3. Retains the decorative characteristics of the building.

It should be noted that the enamels used for painting wood are highly resistant to abrasion. Therefore, subject to all the rules and nuances for dyeing wood, it will be necessary to replace and update the already applied enamel no more than once every few years.

Articles

Alkyd or acrylic primer: which one to choose?

15.05.2014

Surface preparation before finishing with any materials is extremely important. Priming helps to save you money, significantly improve the quality of repairs and extend its service life. How to choose the right building materials and carry out the work?

The primer is used for all types of substrates: metal, wood, concrete, brick, plaster, drywall, putty. Its main purpose is to provide a strong "seizure" of finishing materials, be it wallpaper, paint, varnish or tile, with the base. Paint and varnish technologies do not stand still, now you can find a primer that will protect wood from rotting and the formation of fungus, metal - from corrosion, plaster or putty to give special strength due to deep penetration or even color.

The choice of primer should be based on the type of substrate and the properties you want to give it. Today, a large assortment of acrylic and alkyd materials is presented on store shelves.

What is the difference between alkyd paint and acrylic paint

The former are used for almost any reason. Their main advantage is that they are odorless. When renovating in small spaces, an acrylic primer is indispensable. However, if you need to carry out work on metal, then only alkyd material will help here. It reliably protects the iron from rust. Experienced builders prefer alkyd primers to acrylics for outdoor work.

The most common among alkyd is the GF-021 primer. Its anti-corrosion properties can significantly extend the service life of metal products.In addition, the primer is often and successfully used for other types of substrates, for example, for wood, drywall, brick, plaster. The technical characteristics that the manufacturers indicate on the labels give the right to call the GF-021 primer universal. In particular, this term appears on the bank of the Yaroslavsky Kolorit trademark. If you are in doubt about which primer to buy, then you can safely choose the GF-021 primer. Specifications, including consumption per m2 and drying time, vary across product lines. Before buying, be sure to read the instructions for use.

Traditional colors for alkyd primers are brown, red-brown and gray. The palette of this material does not always play a big role, since it is most often applied under finishing materials. When absorbed and dries, the primer becomes dull, however, it can affect the color of the future coating. If you choose a primer for light wallpaper, then alkyd will not work for you.

Among acrylic materials, deep penetration primers stand out. They are designed to strengthen loose and fragile substrates. Among them can be concrete, plastered, wood, cement, gypsum, plasterboard, previously painted surfaces. This type of primer penetrates as deep as possible into the substrate and reduces its absorbency, allowing significant savings in subsequent painting work. You will find such a primer in the lines "Yaroslavl Coloring" and "Norm".

The "Braska" line also includes a deep penetration primer, but it has additional properties that are valuable for repairs. It contains a fungicide, a chemical used to fight fungal diseases. The primer is ideal for woodworking, protecting the substrate from mold and harmful bacteria.

Acrylic primers, in contrast to alkyd, colorless, some of them are used as an independent coating. This is your option if you are looking for a primer for gluing light-colored wallpapers. This type of primer can be used both indoors and outdoors.

You do not have to worry about the quality of the coating formed by the primer, if you chose it taking into account the existing base and finishing materials. In this case, the soil will responsibly fulfill all the duties assigned to it.

Difference between acrylic and alkyd paint Which is better

Many car owners, when they drive their swallow for painting, ask me, they say, what kind of paint will you paint? Alkyd or acrylic? But when I ask them in response, what is the difference between them? Hang on…. Now let's try to figure out what's what.

Here, acrylic.

What is alkyd paint?

Automotive alkyd enamel is a derivative of oily alkyd resin. The alkyd type can be called a more modernized version of oil paints.

They are characterized by a similar mechanism of hardening and the formation of a surface film (which, by the way, is somewhat stronger, but less elastic). Alkyd paints consist of polyhydric alcohols (for example, glycerin) in combination with orthophthalic acid.

Actually, the word "alkyd" comes from a combination of the words "alcohol" (alcohol) and "acid" (acid). Alkyd paint for cars has been used for painting for more than a decade and has managed to prove its positive qualities.

It is used to give a new look to the body because of its ease of application to the surface and a wide variety of color shades in the palette. It cures quickly and does not require multiple coats, but requires careful surface treatment before painting.

Do not forget that fast setting leads to the formation of a thin film, which, not under all environmental conditions, makes it possible to quickly and evenly dry the entire applied layer in depth, therefore, special hardeners are now added to the composition of auto paint.

Alkyd paint for metal protects the surface from aggressive external influences and, as a result, from corrosive processes, but it is short-lived. The great advantage of such paintwork materials is low cost.Such enamel is used very rarely for a complete painting of a car, as it requires additional varnish and polishing.

There is also a completely matte car enamel, it is used either for local repairs before varnishing, or as an independent decor for parts that do not need gloss.

What is acrylic paint?

The composition of paints may include various additional components designed to improve certain properties (add elasticity, accelerate drying). Unlike alkyd paint, acrylic paint retains its original appearance much longer.

The enamel can be either glossy or matte.

• High reflective characteristics of the painted surface;
• Short period of time from application to complete drying;
• Resistance to mechanical stress;
• Low shrinkage when painting.

Basic properties

• Life time. Unlike alkyd paint, acrylic paint retains its original appearance much longer. It is advisable to renew alkyd paint about once a year, since oxygen and ultraviolet light intensively destroy the surface layer of the paint.

  Acrylic coating, subject to the technology of surface preparation and paint application, can last for years.

• UV resistant.

  Acrylic practically does not change the properties of the surface film under the influence of sunlight, that is, it does not fade, does not turn yellow and does not acquire a "matte" appearance (yet it does change). Alkyd compositions are not so reliable in this regard.

• Drying process.

  The alkyd film dries relatively quickly, and after a couple of days it fully fulfills its protective and decorative functions. The acrylic film completes its formation approximately one month after application to the surface. In this case, the coating should be protected from mechanical stress until it is completely dry.

  

  

  

  

  

  

  

  

  

  

• Mechanical stability. A longer process of forming an acrylic film is compensated by a higher level of resistance to mechanical stress (deformation, scratches).
• Decorative properties.

  Alkyd compositions are distinguished by a more diverse range of shades and halftones, as well as generally brighter colors. On the other hand, acrylic paint lasts longer and does not require regular renewal.

The moral of this fable is that tractors and tanks and all sorts of pieces of iron can be painted with any of these paints)))) But for painting our personal cars we use only acrylic paints.

Terminology and composition

First of all, it must be said that there is nothing in common between enamel and paints and varnishes. Enamel is a glassy formation that includes quartz, alkaline metal oxides, pigments and other constituents. After being applied to the substrate, these components are thermally treated, resulting in a very durable, wear-resistant protective layer. Unlike paints that are applied to the surface of a product, enamels are fused. Examples of the use of enamel include enamel dishes, enamel-coated bathrooms, some types of ceramics, etc.

Paint is a broader concept than enamel paint composition. The first enamel paints and varnishes appeared after chemists learned to modify pentaphthalic varnish with alkyd resins. Unlike the enamel composition, the usual paint and varnish material is made on the basis of linseed oil (natural drying oil), brought to a boil. The difference in composition is noticeable even by the marking: on cans with enamel paintwork materials there is always the abbreviation PF (pentaphthalic), but simple paints contain the MA index (oil). It differs from ordinary enamel paint in a smoother and more durable coating.

Enamel paint is liquid or paste-like pigments, the medium of which is a solution of film-forming agents in organic solvents.As a film former, varnish, alkyd resin or another substance with similar physicochemical characteristics is usually used. When the enamel paint and varnish material dries up, an opaque film remains on the surface, which differs in different cases both in color and texture.

As for the gloss of the coating, this indicator depends not only on the film former, but also on the additives included in the paintwork materials, and therefore some ordinary paints shine much more intensely than enamel ones.

It is worth mentioning such a characteristic feature of the enamel composition as a pungent odor. For ordinary paints, an unpleasant strong smell is not at all necessary, especially if they are made on a water basis: the smell may be absent, weak or even aromatized.

Despite the above, it should be noted that enamel paints are not always the best choice. The feasibility of using enamel paints and varnishes depends on the specific circumstances. For example, if alkyd enamel paint is the best choice for wooden window frames, then for a park bench it is better to opt for polyurethane paintwork.

With hardness and elasticity, the situation is more unambiguous: enamel paintwork is stronger. It should also be noted the high moisture resistance of enamels in comparison with conventional paints, which swell and crack under the influence of moisture.

Enamel paints are a relatively small segment of paintwork materials, in which the compositions are characterized by high strength and opacity. Especially often enamels are used in industry when it is necessary to prevent the development of corrosive processes.

Acrylic composition: characteristics

This water-based paint contains polyacrylate polymers and their copolymers for film formation, water, fillers and various additives. When applied to a surface, it dries quickly and forms a tough elastic film that can withstand exposure to water.

The main characteristics of the material are the following:

• Moisture resistance. Such a coating is not washed off with water during wet cleaning, does not dissolve from its influence, does not react.
• Water vapor permeability. The paint dries up and begins to let steam from the underlying layers to the outside. It allows the walls to breathe, thanks to which gas exchange with the environment takes place in the room without hindrance and the usual level of humidity is maintained. Therefore, this paint is recommended for interior and exterior decoration of houses.
• Elasticity. Despite the fact that the film is rigid and strong, it is capable of contracting and expanding without breaking the integrity and structure. Therefore, it has proven itself well on facades and metal surfaces that experience strong temperature changes.
• Good adhesion. It interacts well with the surface, which speaks of its durability and resistance.
• Wide thermal range. This material is used in different climatic conditions, it perfectly tolerates both the lowest temperature indicators and the highest.
• UV resistant. Acrylic latex, unlike BSK, perfectly tolerates the sun's rays, therefore it can be used on the sunny side of the facade.
• Wide range of colors. This class of paint has from 2 to 5 thousand different shades, which favorably distinguishes it from others. The unique color rendition finds rave reviews from designers and interior designers.
• High wear resistance. Acrylic latexes are the basis for the production of anti-vandal protective paints for facades, plinths and floors.
• Security. The composition does not contain organic solvents and heavy metal salts. Therefore, this paint can be classified as the safest, which allows its use as a decoration for a bedroom, nursery, dining room.

The versatility of the acrylate composition should also be noted.On its basis, paints and enamels are made that can be applied to glass, stone, plastic, metal, brick, concrete, and plaster.

Despite the above advantages of an acrylic water emulsion, it cannot be used instead of a fire retardant for metal Polistil. Zinga's electrically conductive material is also very different in composition.

So, latex paint is the latest development that has taken its own niche in the range of finishing materials for indoor and outdoor use. All of its varieties, including acrylic, have specific features that distinguish it from other paint materials. Only a latex base will create a silky finish that will perfectly retain surface texture.

Colors

The color palette of alkyd paints is one of the most diverse among all types of enamels and is not limited only to white and black tones. This allows you to easily find the right shade. In addition, you can get the desired color by mixing enamels of different colors. The decorative properties of this material are also significantly higher, for example, compared to no less high-quality acrylic paint.

According to the degree of gloss, both glossy and matte coatings are available. Spray paint is distinguished by the presence of such non-standard colors with interesting effects, such as:

• chrome - most often used for car rims;
• with a metallic effect;
• with a golden glow;
• glow-in-the-dark paint.

Liberon Metal Effect

Wear-resistant paint for wood, widely used in public buildings such as school, kindergarten, hospital. The coating is environmentally friendly, odorless, lays down in a dense layer and does not require a lot of time to dry. It is not recommended to use paintwork on external facades, despite its durability, due to the lack of resistance to low temperatures. Liberon Metal-Effect is distinguished by a high level of biosecurity against insects and mold.

Advantages:

• Lack of unpleasant smelling impurities;
• Convenient packaging;
• Does not cause side effects on subsequent contact;
• Well diluted with simple solvents.

Disadvantages:

• The enamel finally becomes resistant after 3-4 weeks;
• Available in only 2 colors: white and transparent.

When coloring, you need to carefully observe the proportions, since it is very difficult to correct the resulting shade. It is convenient to apply the diluted paint with a special spray.

For the manufacture of high-quality oil paints, manufacturers use compositions based on drying oil. Materials are considered quite toxic, they are advised to be used only at medium temperature indicators, in dry conditions. Experts identify several of the best paintwork in terms of composition and quality.

Terminology

By paints we mean materials that are used to give different colors to any surfaces. There are oil, alkyd, acrylic options - the list is huge. Let's consider the differences between the concepts - paint and enamel, because the difference between these products is already in the terminology.

Enamel has nothing to do with paintwork. Scientifically speaking, this is nothing more than a glassy thin coating consisting of quartz sand, oxides of various alkali metals and pigments. It also contains components that are heat treated and subsequently form a durable and wear-resistant protective layer. Examples include enamel pots and bath liners. Natural enamels should not be confused with enamel paints. These are two different things.

Composition

Enamels are called solutions of pigments in film formers - alkyd resins or varnishes. If oil paints are made on the basis of vegetable oils, then enamels are a modification of pentaphthalic or glyphthalic oils. Since they are made from alkyd resin, compositions based on them are called alkyd.

White spirit is most often used as an organic solvent in enamels. Therefore, if you do not know how to dilute alkyd enamel, use it. To give the paint special properties (antifungal, anti-corrosion), various additives are introduced. Finely crushed sand, granite, marble chips serve as fillers.

The difference between enamel and oil paint is noticeable externally. The first is more shiny and smoother. Pentaphthalic solutions, resistant to abrasion, are used in everyday life for painting floors. Glyphthal enamels are used on an industrial scale to create a protective film on metals.

Melamine-formaldehyde drying oils are used less frequently in production. The first ones are intended for processing surfaces exposed to high temperatures (up to + 175 ° C). Alkyd-styrene compounds are used mainly to protect metal and wood.

Advantages of alkyd paints

The relatively low cost is one of the fundamental factors that determine such a wide popularity of this paint and varnish material. Due to the affordable price of the product, the consumer can significantly save money, especially on large volumes of work.

• Ease of application. Special knowledge and professionalism are not required to work with alkyd paint, so even a beginner with no experience can apply the composition. All that is needed is to act in strict accordance with the instructions specified by the manufacturer, as well as properly dilute the composition with the solvent intended for this and in the right proportion. To apply paint, you do not need a professional tool - you only need an ordinary roller or paint brush;
• The richest selection of different shades. Today, the consumer has the opportunity to choose from a huge assortment, which allows him to choose the perfect color for almost every surface to be painted. Alkyd paints have always been prized for the richness and brightness of colors;
• Fast drying. The paint dries almost completely within a few hours after the work, and after 2-3 days the maximum strength of the coating is achieved.