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Kuzbasslak: Application and characteristics. What is Lucky See in the Construction Terminals Dictionary Varnish Pekovy

A little bit about varnish, their manufacture and use



Lacques are called materials that are solutions of natural and synthetic resins or polymers in water or volatile organic solvents. When applying a varnish to the surface, the solvent evaporates, and on the surface due to the polymerization of the film-forming, a solid transparent colorless or painted film remains. The film can be dissolved by the same solvent, so the process becomes reversible.
Varnish coatings are used when it is necessary to protect and save or emphasize the surface structure. Lucky is applied to the prepared surface and form the last layer of a multilayer coating. Nakov is determined by the type of film-forming substance, for example, Oil, resin, nitroles, bituminous, acrylic, etc. Varnishes can be classified and depending on the type of solvent ( for example, alcohol, water ... ).

Oil varnishesobtained by dissolving natural or synthetic resins in drying vegetable oils with the addition of sequivans and solvents. Kanifol, amber and shellac are used as natural resins. Because Natural resins, except for rosin, are deficit, they are replaced with synthetic resins (polymers) - perchlorvinyl, alkyd, phenol formaldehyde, etc.

Oil (or "fatty") varnishes contain oils more than resin. They dry for a long time - from 1 to 4 days and give an elastic and resistant film. Forers include, for example, lacquer for flooring. It has 41.2% oil, 22% resin, 36% solvent and 0.2% sequivat. Oil varnishes More than others are exposed to atmospheric factors and are used for internal work, in particular, to cover wooden floors, increasing their decorativeness and durability (resistance to erasing is growing). Such films are little sensitive to seasonal oscillations of relative humidity indoor indoors, causing a change in the hydroscopic moisture of wood and, as a result, its dermole or swelling.
Lucky containing more resin than oils, or an equal number, called "Torshi" and "Middle", respectively. The "skinny" varnishes quickly dry (from 6 to 24 hours), give solid, but fragile films, neatmapher-resistant; Different with strong glitter. Middle varnishes dried during up to 48 hours, have an average elasticity and strong glitter, they are well polished, but not enough atmospheric resistant. Middle fat varnish contains approximately 30% oil, 42% shellac and a 28% solvent. Such a varnish is a good coating for furniture, keeping wood texture. The wood covered with them is easily polished with alcohol to the full shine.

Depending on the solvent used, several types of varnishes are distinguished.


Alcohol varnish - 30-35% resin solutions, such as shellac, in ethyl alcohol. To dry out alcohol varnishes at room temperature, it takes 15 minutes.

Lucky based on thermoplastic polymers


Shellaic varnishes. Shellac is formed as a result of the vital activity of insects that feed on the juice of the lacquer. Imported mainly from India.
Efyrocellulose varnishes - Solution of cellulose esters with additive resins and plasticizers in organic solvents.
Acetobutiracellulose varnishes Prepared on the basis of cellulose acetobutirate - mixed cellulose ester with acetic and oil acids.

Lucky based on chlorine-containing polymers


Perchlorvinyl varnishes - solutions of perchlorvinyl resin in organic solvents. PCS perchlorvinyl resin is obtained by chlorination of polyvinyl chloride resin to chlorine content 62-65%. These varnishes are colorless, dry for two hours at a temperature of 18-23 ° C. HSL varnishes are applied to oil coatings in order to improve their anti-corrosion properties, and the HS-76D varnishes protect building structures from the effects of aggressive media. These varnishes are toxic, they are used only in the premises where people are underwhere. Consumption - 350 g / m2.

Lucky based on thermosetting polymers


Alkyd varnishes - solutions of synthetic (alkyd) resins in organic solvents (Whitespit or in a mixture of it with xylene or solvent with the additive of sequivans). Alkyd varnishes form solid, transparent, almost colorless films, resistant to moisture. Alkyd varnishes are the most common of used in everyday life for indoor and external work. Lacquer consumption on average on a single-layer coating - 70-75 g / m2, dried time - 48 hours.
Polyurethane varnish. When the interaction of isocyanates containing two and more reactive groups with compounds having several hydroxyl groups are first obtained by monomochhanes, which are then converted to polyurethanes - high molecular weight resins. Polyurethane and alkioderetan varnishes give films with very high strength and durability. They lacine furniture, floors, musical instruments.
In epoxy varnish The main film-forming component is epoxy resin grades of ED-16 and ED-20. Before use, a hardener is added to them. The films of these varnishes are distinguished by high water and alkaliiness, density, adhesion to various materials, but are exposed to atmospheric factors. In household conditions, epoxy varnishes are used to prepare putty, gluing, making souvenirs, etc.

Acrylic (water-based)


This type of varnishes is considered the most environmentally friendly. They are not combustible, which displays them in the discharge of fireproof. Since the basis is water, their use is possible mainly for interior finishing works. Acrylic varnishes have sufficiently high rates of strength and elasticity, as well as not<поджигают> Wood, maintaining its original color and natural texture. The lack of acrylic varnishes is their dependence on the microclimate of the room, in
which produces work. For normal crystallization, it is necessary that the humidity is at least 50%, and this is often hard to provide, especially in winter.
Polish - These are 10-14% solids solid resin in ethyl alcohol raw. Used to polish wood after grinding and primer of its surface.
Among the polymer film-forming, the leading place belongs to condensation polymers (alkyd, urea-melamino-formaldehyde, epoxy, phenoloformaldehyde).

Nitrocellulose varnishes (nitroqi) - This is a cellulose nitrate dissolved in a mixture of volatile organic solvents with additive resins and plasticizers. They are distinguished by high atmospheric resistance, transparency, ability to grind and polish. Have the smell of a pear essence. Nitroquacked coating dries in 10-15 minutes. Nitroleki serve for painting of special-purpose walls in clinics and other medical institutions, they cover the built-in furniture. Coatings from these varnishes have improved physical and mechanical characteristics, increased light-resistance and resistance to weak solvents and chemical reagents.

Bituminous varnishes They are solutions of resins and bitumen of special brands in a fly solvent. Composition: Resin bright -20%, bitumen - 45%, solvent - 35%. Hyd, varnishes form a black film with a strong glitter, which has a resistance to water and a number of other chemical reagents. These varnishes are not suitable for external coatings due to insufficient weather resistance, have anti-corrosion resistance and are used for painting metal surfaces, since They are cheaper than other protective equipment.

Coal lacquer Also called pecked varnishes or kuzbaslak, are a solution of a coal pen in solventiaft. The film has high adhesion, waterproof; The disadvantages include small plasticity and resistance to harsh temperature changes. Coal lacquer is a good anti-corrosion coating for metal products of sanitary equipment.

The solutions of natural or synthetic substances are called, which, after applying to the surface and drying, form thin, but durable transparent or opaque films. Bitumen, rosin, sandarab, shellac, cheap or amber applied from natural. Artificial - perchlorvinyl, epoxy, urea-formaldehyde, alkyd, pentafthalous and other polymers. The solvent is used, turpentine, solvent and other volatile organic fluids. Special additives are introduced into their composition to give varnishes of special operational properties.

The varnishes are asphalt, bitumen, oily-resin, alcohol, ethyl and nitrocellulose. Their main purpose is to create a coating that combines decorative and protective properties. At the same time, the protection of protection protects the surface from corrosion and mechanical damage, forms electrical and thermal insulation. For applying varnishes, tampons, sprayers are used; Methods of pouring and dipping are also used.

An extensive area of \u200b\u200bapplying varnishes are building painting works. Here it is necessary to obtain a solid, durable, well-kept film on the surface, so painting varnishes contain a resin with high adhesion and hardness. Oil-resin varnishes were found from the natural consumption, but at present, various synthetic compounds are used increasingly.

Consider various varnishes in more detail.

Bituminous, bitumen and oil-resin varnishes

A wide range of bituminous varnishes is made of a binding colloidal bitumen substance and solvent. Sometimes the solvent is dominated by Olif or other drying oils. When the lacquer dries, the solvent, evaporating, is removed from it, and the oil is oxidized with a chemical path with it and hardens that he strengthens the varnish and increases its adhesive properties.

One of the species of peek varnish is the so-called Kuzbasslak - a coal basis composition. Peck of coal dissolves in solvent and other volatile aromatic compounds. To increase the durability of the coating in Kuzbasslak, 15-20% of aluminum powder or 34% of Kuzbasskraskra (Iron Surik) are introduced. Such a varnish perfectly protects almost any surfaces from corrosion in gaseous media, so it was distributed in various fields of industry. According to the strength and colloidality, Kuzbasslak is divided into two varieties - a and B.

Bitumenic acid-resistant LAC BT-783 is a solution of a mixture of bitumen with natural vegetable oil in solventiaft, turbidar or other similar substances. They cover building structures, most often metallic. Varnish is applied in two layers and completely dries over a day at room temperature. To create a protective layer of open surfaces in the second layer, 10 - 15% aluminum powder are added.

This composition has and, in which, in addition to drying oil, a sequivator is added. When mixing BT-577 and aluminum powder, BT-177 paint is obtained, which is designed to protect the surfaces located in aggressive weakness media. There are other brands of bitumen and oil varnishes, popular with builders, for example, BT-123, BT-980, BT-988. If it is necessary to cover with an increased water resistance, bitumen-divinilacetylene compositions should be used.

From the oil bitumen of the BN-1U and gasoline brand, mixing them in ratios 1: (1 ... 3), lacquered lacquer. It serves for primer, staining and anti-corrosion protection of both metal and non-metallic (for example, concrete) structures.

Another protective lacquer, resistant to the action of weak acids and alkalis in a liquid and gaseous form, is called "ethinol" and is manufactured in accordance with TU 966-3465-57. It contains waste production of artificial rubber dissolved in an organic solvent with the addition of 10 - 20% of oil bitumen BN-1U and BN-y brands, fillers (asbestos, graphite, kaolin) and 2 - 3% of stabilizers.

Synthetic glyphthalic and pentafalum resins are included in the composition of both oil and oil-free compositions. Oil-resin varnishes GF-166 and PF-283 containing resin data serve to work indoors. They open wooden and metal surfaces, including painted with oil paints. With GF-166 drying at room temperature for up to two days, you can work outdoors.

Synthetic oil-free varnish

Pentafthalic, perchlorvinyl or alkyd-styrene synthetic resins constitute the basis of almost all oil-free varnishes, which serve for interior and exterior wood, metal and paint. For example, PF-170 and PF-171 are pentafthalic varnishes, which are a solution of a pentaphthalic resin with the addition of a sequence in organic solvents. They are specifically designed to work with aluminum and its alloys and create weather-resistant shiny coatings drying in 2 - 3 days. They can also be added to alkyd enamels to increase their reflective properties.

The HC-784 is a polyvinyl chloride varnish containing plasticizers. It is used to protect machines, equipment, metal and concrete building structures indoors. Applied to the primed surface in several layers.

MS-25 varnish is alkyd-styrene, covers wood, aluminum, copper and bronze and serves for internal work. It forms a resistant anti-corrosion film, which will dry quickly (up to 8 hours).

Lucky XC-769 and XSL - perchlorvinyl, form a colorless coating, drying even faster - in just 2 hours. The first of the compositions is designed to protect against aggressive environments of building structures, the second - to strengthen and impart anticorrosive properties to oil coatings. The disadvantage of perchlorvinyl varnishes is their increased toxicity, so they are only suitable for non-residential premises, where people are only a short time.

Aesthetic and safe nitroquackers, in particular, NC-228 and NC-243, were widely used in furniture production. The two above-mentioned brands are distinguished by increased mechanical resistance and strength, as well as resistance to light and detergent, including solvents.

In conclusion, we mention the so-called polytema - a special kind of varnish, used for polishing furniture, parquet and other wooden surfaces. Politura consists of alcohol (80 - 90%), in which shellac, nitrocellulose or other film-forming substance is dissolved.

Lucky and paints have become a big distribution among developers thanks to a large range, accessibility and high quality, so it is not surprising that many ask themselves the question: how to dilute the lacquer and what it represents.

Varnish This is a solution of film-forming substances in solvents of organic species or in water, which forms a solid homogeneous transparent film after applying to the surface and drying. Varnish It is used widespread to protect various surfaces from corrosion, atmospheric precipitation and rotting (in the case of wooden surfaces) and to give surfaces of the decorative species.

And also used to create electrical insulating, thermal insulation anti-corrosion and other protective coatings with building structures. Color and transparency of the lacquer film are important for storing wood texture

When applied to the surface of the wood, such properties as color and transparency are very important, so it is very important to keep wood texture and treated surface. How to dilute varnish? For breeding varnishes to working painting viscosity, various solvents, license plates, white spirit, coal, turpentine solvent, turpentine and other types are used.

Table 1. Solvent characteristics

Solvent characteristics

Strongly thickened varnishes are first bred by a solvent. After 3 ... 4 hours, the extracts of the varnish are adjusted to the desired consistency with a diluent. At the same time, the amount of them in varnish should not exceed 5%, the introduction of large quantities can lead to the fallout of the resin and damaging the material.

Solvents are liquids used to impart the colorful compositions of the necessary painting consistency. Depending on the purpose, they are separated by solvents for oil paints-gasoline, White spirit (GOST 3134-78 *), turpentine (GOST 1571-82); glyphthaled and bitumen varnishes and paints (solvent-naphtha, turpentine, xylene) (GOST 9949-76 * E), perchlorvinyl paints - Acetone (GOST 2768-84 *); Adhesive and water-emulsion paints with solvent and diluent is water.

The overwhelming majority of solvents are hydrocarbon organic volatile fluids, explosive and combustible. Solvent characteristics are shown in Table 1.

When choosing diluents and solvents, the conditions for performing painting works should be taken into account. Active solvents and diluents with low boiling point allow you to reduce the time of drying the films. However, it occurs a strong cooling of the painted surface, as a result of which moisture condenses on the film, and therefore, the strength of the coating is reduced, its color changes, adhesion decreases.

In addition, it is necessary to take into account flammability, smell, toxicity, the ability to cause metal corrosion. In order to avoid a fire and an explosion, precautions must be observed. It should be remembered that the concentration in the air of the vapor of solvents during prolonged inhalation can cause dizziness and even faint.

The use of solvents for washing hands leads to skin diseases. The most harmful solvents include the following: benzene, dichloroethane, methyl alcohol, trichloroethylene, chlorobenzene and others.

Picture 1. Construction lacquer of the PF series

On the processed surface of the varnishes are applied with a brush or a tampon, by spraying or dipping and in the pouring method. Industry produces the following types of varnishes: bitumen-pek, oil-resin, nitrocellulose and other types of varnishes. Lac gf-166 (PF-283) is very famous and widely used in construction when protecting metal and wooden surfaces.

It is a solution of an alkyd pentaphthalic or glyphthalic resin, which is modified by vegetable oils in organic-type solvents with the addition of the SICKATIV NF-1. The varnish gives the surfaces with a homogeneous transparent and glossy shiny protective film. Used as a protective coating and decorative, but toxic and flashed.

When applied to the surface of indoors, it is advisable to open windows and doors to ensure good ventilation. Also, it is necessary to protect the respiratory organs by using respirators, since the composition is toxic. The varnish can be applied with a brush or spray with oil paints, metal and wooden surfaces, outside and indoors.

Lacon construction

1. Calibular lacquer marks of marine A and B. (GOST 1709-75). It provides a solution of a coal feed in oils. When applied to the surface, the lacquer gives a brilliant .Ohnomogeneous protective film. It is equipped with toxic and fire hazard and steel products, cast iron as well as wooden. Prosico is used when protecting against corrosion of sewage and water pipes and communications. The waist is applied with a brush or spraying and dipping.

Figure 2. LAC Construction HS-76 series

2. LAK XC-76 (GOST 9355-81). This is a solution of resin-type SVX-40 in a mixture of volatile solvents of organic species. When applied to the surface, the varnish gives a homogeneous, smooth and glossy surface film. The lacquer coating is chemically resistant, sour and alkali. Its properties retains at temperatures up to 60 degrees. At the beginning, the coating is applied primer xs-010, then after drying, varnish or enamel 710 is applied. It is used widely to cover the equipment, to protect against the effects of acids and alkalis of various metal structures. The wax is applied to the surface by spraying or with a brush.

3. LAK EP-730 (GOST 20824-81). Cleans the epoxy e-41 resin solution in a mixture of organic solvents. Previously use a hardener No. 1 (100: 3 hours by weight). Varnishes with a mixture of xylene-acetone-ethylcellulose, in parts by volume: 4: 3: 3. When applied to the surface, the varnish gives a flat and smooth homogeneous protective film. Varnish is toxic and fire hazard. Supported in construction when protecting various surfaces from moisture, alkalis and high temperatures. The suggests are used to protect steel, aluminum and non-metallic surfaces that can be operated under outdoor or indoors. Naturally with a brush or spraying.

♣ Table-2. The main properties of varnishes

The main properties of varnishes

Table 3. Purpose and characteristic of varnishes

Purpose and characteristic of varnishes

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Special tools are used to protect the surface of the materials. One of them is Lacquer BT-577 (or "Kuzbasslak"). This agent is used to protect metal, wooden and concrete surfaces in both outdoors and indoors.

Description

"Kuzbasslak" began to be produced even before the beginning of the First World War. Over time, its composition has changed slightly. Previously, P-4 was used as a solvent. Because of this, the lacquer layer dried for a very long time (from 24 to 32 hours). Currently, synthetic additives are included, accelerating the drying process and the addition shine-processed surface.

BT-577 varnish is homogeneous in composition and viscous consistency with black liquid without extraneous impurities. It is dissolved in organic solvents (benzene, ligroin) coal pitch. Drying oils are not included in the composition. It is allowed to use the means together with the chemically resistant perchlorvinyl varnish in the ratio of 1: 1.

To improve the quality and increase the life of the surfaces, it is added (up to 30-34%) or powder from aluminum (up to 15-20%).

Kuzbasslak, the price of which on average is 50 rubles per 1 liter, is a solution of polymer resins, bitumens in organic solvents. Also, special additives are also introduced, which improve physical and chemical properties, operational characteristics.

Technical characteristics of funds

"Kuzbasslak" (we will discuss it below) has the following protective and waterproofing properties:

  • varnish has good adhesion with surfaces of various types;
  • a layer of means is obtained by glossy, durable, the pores are practically absent;
  • resistant to mechanical effects and significant loads. After removal of the load, the coating is restored to its indicators;
  • withstands the temperature differences and severe frosts, does not crack from the cold;
  • even with adverse weather conditions, the lacquer layer retains its structure and coating quality;
  • does not give to emerge microorganisms.

The surface of materials treated with varnish is not afraid of frosts, moisture (even sea water), exposure to the sun (ultraviolet), corrosion. After complete drying, it is allowed to be cleaned using detergents.

An increase in the viscosity of Kuzbassslak during storage is allowed. In this case, it is diluted with a solvent in an amount of up to 10%. This will not entail the deterioration of the indicators and the characteristics of the means.

Advantages and disadvantages

The main advantages of BT-577 varnish can be attributed as follows:

  • High quality protection.
  • Availability.
  • Universality.
  • High degree
  • Easy use.

Efficiency is another substantial plus in favor of the "Kuzbasslak" means to use it into several layers does not entail high expenses, since only 100-200 ml of means is used for one square meter.

From disadvantages, you can only single out one - black color, which is hard if necessary to hide another tool.

BT-577 varnish is not applied to material in production. It is used already at the end of the installation work.

Kuzbasslak: Application

The means is mainly used to protect metal, concrete (reinforced concrete), brick surfaces from the influence of atmospheric factors. The Kuzbasslak means can also be used as waterproofing. Application on wood is another direction of using this composition. This is done in order to prevent wood rotting.

To protect cars (for the most bottom), Kuzbasslak also use corrosion. The use of funds is justified in cases with other techniques: to protect trailers, cart, hollows, and so on.

BT-577 is used to glue the roll or sheet materials when laying the roof. For this you do not need to use open fire, thereby reducing the likelihood of fire.

When using "Kuzbassslak" until the paint application (other paints and varnisions), it will replace the primer layer.

Application of funds

A tool is applied in various ways: brush, rag, roller, spraying with a pulveriary. Separate details of small dimensions can be simply dipped into a varnish solution.

The processed surface must be clean, without dirt, dust and traces of rust.

Kuzbasslak is applied in several layers (usually two or three layers). Drying time depends on temperature and can vary from several hours to days. You can use a sequivator that is added to the solution as a drying accelerator.

Use the tool is allowed in the temperature range plus 10-20 degrees. To store the temperature should be in the range of minus forty to plus forty degrees.

BT-577 varnish is a poisonous substance. Therefore, all work should be carried out using personal protective equipment and compliance with other safety requirements.

The species composition of varnishes is quite diverse. Most preferred for construction and repair work Epoxy, alkyd, perchlorvinyl, urethane and polyurethane. In every often the choice is made in favor of bitumen, oil, alkyd, nitrocellulose varnishes. Classifice varnishes most often in terms of application and material of the base of varnish. Domestic varnishes, divided by the chemical composition of the film-forming substance, is customary as follows:

  • AC - alkyd acrylic varnish;
  • Ay - alkyd-urethane varnish;
  • AK - polyacryl varnish;
  • BT - bitumen varnish;
  • Va - polyvinila acetate varnish;
  • GF - glyphthale varnish;
  • MCh - carbamide varnish;
  • Ma - oil varnish;
  • NC - nitrocellulosic varnish;
  • Ur - polyurethane varnish;
  • PE - polyester varnish;
  • PF - Pentafalian varnish;
  • Va - polyvinila acetate varnish;
  • KH - perchlorvinyl lacquer;
  • EF - epoxy lacquer;
  • EP - epoxy varnish.

Select varnish

When choosing a varnish, you should focus on the operational characteristics of the material and the scope of its application.

Alkyd varnishes /\u003e are the most common among the compositions used in everyday life; Present solutions of synthetic alkyd resins (glyphthaled or pentaphthalic) in organic solvents. The film formed by alkyd varnish, transparent, solid, with good adhesion to various surfaces and high water resistance. Alkyd varnishes can be used for internal and outdoor work. There is an erroneous opinion that alkyd varnishes are the same as oil. Despite the fact that in the manufacture of alkyd resins, vegetable oils are used, alkyd varnishes differ from oil and even superior to their operational properties.

For the manufacture of oil varnishes /\u003e dissolve natural or artificial resins in drying vegetable oils with the addition of solvents and sequivans. Shellac, rosin and amber are used as natural resins. Natural resins are quite deficit (except for amber and rosifoli) and are applied limited. Therefore, they are often replaced with synthetic resins (polymers) - perchlorvinyl, phenol formaldehyde, alkyd and others. When using oil varnishes, transparent solid films of yellowish color are usually formed. Oil varnishes are distinguished by low weather resistance, so they should be used exclusively for finishing products indoors.

Alcohol varnishes /\u003e are made, dissolving in wood or wine alcohol such natural resins as Sherlak (Shellac), mastic and sandarak. The varnishes thus obtained form a coating with good adhesion to various surfaces, high mechanical strength and glitter. Surfaces covered with alcohol varnish are well polished, but have low water resistance. Because of expensive and scarce natural raw materials, oil and alcohol varnishes are produced in small quantities. They are usually used in the manufacture of toys and musical instruments.

So called nitrolakes (nitrocellulose)/\u003e It turns out when the cellulose nitrate is dissolved in a mixture of active organic solvents. To give such varnishes the necessary properties add a composition of various resins (amino-formaldehyde, alkyd, etc.) nitrolac forms quick-drying solid and transparent, almost colorless film. Most often, nitrocellulosic varnishes are used to varnish wooden surfaces.

Bitumen varnishes /\u003e are made of special varnishes, adding various resins and oils in them. The covering of a bitumen varnish forms a film of black, which has resistance to water and some chemical reagents. However, in atmospheric conditions, the anti-corrosion properties of such a film is not high enough. Basically, bitumen varnishes are used to temporarily protect the metal due to their considerable low cost.

Coal varnishes/\u003e are a solution of a coal feed in solvent attachment. Such varnishes are also called peek or kuzbass. This type of varnish was first offered in the Kuznetsk coal inland basin, thanks to which he received its name. The coal lacquer forms a film with high adhesion and waterproof, but with low plasticity and weak resistance to sharp temperature changes. Coal lacquer (Kuzbasslak) is a good anti-corrosion coating for metal products used in sanitary equipment.

Acrylic varnishes (acrylate)/\u003e Get, dissolving acrylic copolymer in a mixture of organic solvents. Acrylic varnishes can be used for decorative coating on glass, wood is different breeds and metal. Acrylate varnish can give wood surface necessary shade and emphasize its texture, and at the same time protect it from atmospheric influences.

Lucky perchlorvinylovye/\u003e are solutions of polyvinyl chloride resin in organic solvents with the addition of various modifying substances. Perchlorevinyl varnishes form a film that sufficiently dry out in air, and has an increased water resistance, wear resistance and hardness. These varnishes are usually used to protect brick, concrete, reinforced concrete, asbetic and other mineral surfaces.

Urethane and polyurethane varnishes/\u003e They are obtained from the interaction of isocyanates, which contain two or more reactive groups, with compounds containing several hydroxyl groups. Initially, mono-stakes are obtained, which are further converted into polyurethanes, the so-called high molecular weight resins. Coatings formed by polyurethane varnish have extremely high wear resistance, mechanical strength. Thanks to the highest impact resistance of urethane varnishes, they are suitable for coating floors, stairs, outer surfaces and even boat housings.

Epoxy varnishes /\u003e are solutions of epoxy resins in organic solvents. Epoxy resin grades ED-16 and ED-20 - the main film-forming component in epoxy varnishes. Before you begin to lacquer the surface, you should add a hardener in the amount of as necessary depending on this type of resin and hardener, as well as the working conditions and according to the instructions in the instructions for use. Epoxy varnish coating forms a film with high alkali and water resistance, adhesion to various materials and mechanical strength. The disadvantage of epoxy varnish is its insufficient weather resistance.