How to dilute polyurethane varnish. Purpose of solvents: which solvent for which paint is better to take. Building material solvents

Any watercraft, be it a small boat or a large yacht, must be clean and well-groomed. This is especially true for ships that are used for commercial purposes. Constant contact with water destroys even the most persistent and durable materials that need regular protection and updating. The surface changes its original color, becomes pale and unattractive. The worst option is the inevitable formation of corrosion, which requires the implementation of full renovation works... It is polyurethane paint that will best solve the above problems!

Why buy polyurethane paint?

Buy paint or varnish on a polyurethane base can be both a private person and a repair shop and a large company. The online store sells products of the famous brand SEA LINE, which are of the highest quality. The main advantages of buying paint are as follows:

1. The composition does not fade on any surface and does not change its characteristics under the influence of weather conditions.
2. Colorful materials are quick and easy to apply.
3. Two-component and one-component paints are used for painting any products, including metal, wood and plastic (subject to the application of a primer).
4. A coating forms on the surface that protects against minor physical damage.
5. Polyurethane paint has universal application, therefore it is suitable for painting all watercraft.

Of course, the price of polyurethane paint is higher than that of conventional analogs, but the above advantages fully cover the money paid. With its help, you can transform appearance pleasure boat, yacht, boat and any other vessel. The composition is easily applied to the surface by its own efforts, so it is not necessary to resort to the services of specialists. But sometimes work surface need to be primed.

You can buy the highest quality polyurethane paint from the official distributor of the SEA LINE brand in Russia on the website. We have presented and expendable materials to facilitate mixing and application of the composition. These are color reducing agents, thinners, topcoats... The enamel is sold in several packaging options for different buyers. Our online store is official distributor brand SEA LINE, so there is no doubt about the quality of the goods.

Polyurethane paint will help protect the surface from various mechanical, chemical or atmospheric influences. It differs markedly from other analogs, both in technical and operational qualities.

Why is she so good? In the article we will try to answer this question, consider the types, differences, characteristics and areas of application of polyurethane paints.

Decorative finish created with polyurethane paint

The unique qualities of this coating make it possible to put it on an order of magnitude higher than others. paints and varnishes.

Distinctive features of paints are:

Polyurethane-based paint has a long service life where conventional paintwork quickly deteriorate.

Types of paints

By composition, polyurethane paints are divided into two types:

1. One-component - immediately containing all the necessary substances (thinners, hardeners, driers, etc.).
2. Two-component - before work requiring mixing of two components from separate containers.

Manufacturers offer several types of paint, let's see how they differ from each other.

Organic solvent based polyurethane paint

Speaking simple language, it is a common polyurethane modified paint.

It belongs to the type of one-component paints and consists of several components:

• Polyurethane.
• Solvent (toluene, xylene).
• Coloring pigment.

Curing or polymerization occurs under the influence of atmospheric moisture, which reacts with the binding components included in the composition.

Important! Dry air in the room does not promote the adhesion of the compound, therefore surfaces painted with polyurethane paint must not be dried with hot air. Simply put, the higher the humidity in the room, the faster the floor will dry, and vice versa.

After application to the surface, the one-component polyurethane paint gains strength after 48 hours. The coating acquires complete waterproofness, special wear resistance, and resistance to aggressive environments.

Water-based polyurethane paint is excellent for painting skirting boards and walls.

It is a one-component paint that uses regular water instead of a solvent. It has no poisonous odor and is completely harmless when painted.

The components of the mixture are evenly distributed in the aqueous medium and form a stable dispersion. As the water evaporates, they gradually move closer together and then stick together upon contact. As a result, we get a thin, durable film that has both decorative and protective properties.

They purchase it mainly for painting walls in rooms with high humidity(cm. ). Paint for polyurethane stucco molding or skirting boards can also be water-dispersion, since it has special elasticity and does not crack when bending decorative parts.

Important! Since the paint contains water, it is capable of freezing at low temperatures. After defrosting, the technical performance decreases markedly.

Alkyd urethane paint

This one-component paint contains the following components:

• Alkyd-urethane varnish (used to form a film).
• Desiccants for fast drying.
• Thinners.
• Pigments.
• Other targeted supplements.

With the help of polyurethane enamel, you can create decorative and protective films with various textures and degrees of gloss. It is used for both indoor and outdoor work. For example, polyurethane floor paint based on alkyd resins can cover both garage floors and yard paths.

The paint is resistant to temperature extremes in the range from -60 to +60 degrees, is not afraid of moisture, has excellent abrasion resistance, can be easily applied with a roller, brush or spray. Thanks to the driers present in the composition, the paint dries quickly (1.5–2 hours), when used on metal it serves as an excellent anticorrosive agent.

Two-component polyurethane paint

It is produced and sold in two containers - separately containing resin and hardener.

The advantages of this division are as follows:

• The ability to prepare the required amount of solution "at one time", while the remainder does not lose its qualities during further storage.
• Curing and polymerization of the paint occurs without the participation of moisture.
• The coating turns out to be more durable and wear-resistant than when using one-component compounds.

Two-component polyurethane paint is used for surfaces that are particularly exposed to negative impacts... It is resistant to soluble acids, alkalis, oil, various types of fuel, is not afraid of marine and running water, Wastewater.

Do-it-yourself mixing of the components is carried out in a separate container with a construction mixer until the composition is completely homogeneous. The prepared mixture has a short lifespan (no more than 6 hours), so the consumption must be calculated in advance, otherwise the remainder will have to be thrown away.

The strength and durability of the coating directly depends on the implementation of the mixing recommendations, which are provided by the manufacturer's instructions attached to the paint. In addition, it indicates the number of possible layers, the type and volume of the solvent, and the application conditions.

Comparative table of distinctive features of paints

Let's summarize the main distinctive properties different types mixtures, and we invite you to see comparative table pros and cons of polyurethane paints:

Important! Regardless of the type and type, polyurethane enamel on a polyurethane base is applied only to the prepared surface, which must be cleaned of dirt, dried, and, if necessary, primed. Ensuring good adhesion and obtaining high-quality coating... It is recommended to purchase the primer specifically for the selected paint and from the same manufacturers.

As mentioned above, all polyurethane paints based on polyurethane perform not only decorative, but also protective functions... For example, polyurethane paint for metal protects structures from corrosion, some types, upon contact with an open fire, begin to foam, which delays the deformation of the metal up to 1.5 hours.

Coating porous surfaces (concrete, wood, etc.) completely isolates materials from moisture penetration, and also protects them from the appearance of fungus, mold or microorganisms.

Which manufacturer to choose

Especially popular and in demand on Russian market are polyurethane paints from the following manufacturers:

I must say that paints from the manufacturer teohim are in special demand, thanks to more affordable price and the variety of goods. Elakor teohim enamel, varnishes and primers will satisfy the most discerning buyer, the scope of their application is much wider than that of other manufacturers.

Conclusion

We talked about polyurethane enamels in an accessible way, now you know what a polyurethane-based paint is, and you understand the difference between different kinds and types of coatings. We advise you to carefully look at the photos and videos in this article in order to finally understand for yourself everything about these coatings.

Polyurethane paints and varnishes widely used in the furniture industry, and in construction supermarkets you can easily find these paints and varnishes for household use. Therefore, we believe that it makes sense to get acquainted in detail with the properties of polyurethane paints and varnishes.

Polyurethane paints and varnishes (paints, varnishes, primers) are a large group of polymers:

• The main component of polyurethane resins are polyols, synthesized on the basis of substances traditionally used for alkyd paints and varnishes, so the price of polyurethane materials is relatively low. Polyols are oligomers consisting of rather large molecules with several tens of active sites.
• The second component of polyurethanes is diisocyanate-based hardeners, which are small molecules with two active sites. During film formation, the active sites of the diisocyanates bind to the active sites of the polyols, thereby forming a urethane bond.

• One polyol molecule can be linked with diisocyanates to many other polyol molecules, and so on. Thus, films of polyurethane paintwork materials are obtained, having a branched three-dimensional mesh structure. Such films are resistant to water, acids, mineral and organic oils, gasoline, oxidants.

The vapor permeability of polyurethane paints, varnishes, primers is an order of magnitude lower than that of nitrocellulose.

Polyurethane paints, varnishes, primers are used mainly for finishing wooden products indoors.

Mixing ratio in polyurethane paints and varnishes

Components working mixture for polyurethane paints and varnishes, usually two parts of resins plus one part of a hardener are mixed immediately before use, since the life of polyurethane materials is short: 3-6 hours.

The ratio of the base and hardener in the working mixture is obtained in such a way that the number of bonds between the molecules is equal to 60-90% of the maximum possible.

Deviations of the amount of hardener in the working mixture from the specified proportion within ± 10% do not lead to a significant change in the properties of the coating.

Solvents for polyurethane varnishes and paints

Solvents of polyurethane materials are mixtures of liquids with a low boiling point, impurities of alcohols and water in them are unacceptable.

For polyurethane materials, a system of tinting pastes has been developed, which can be added to varnishes in a significant amount - up to 30% without deteriorating the performance properties of the materials.

By using a variety of polyurethane materials, almost any desired type of finish can be achieved, from simple one-coat to exclusive finishes.

In domestic technical literature decorative properties polyurethane coatings are usually distinguished by the term "silkiness".

Dried up polyurethane coatings free of any toxicity, let us say food contact with them, polyurethane materials are produced that are certified according to the strict European standard relating to the safety of toys.

The importance of solvents and their role in work not only in wood makes anyone home master better know their types, types and properties, as well as what they are made of.

Although the terms "solvent" and "diluent" are often used interchangeably, these fluids have completely different properties. (For simplicity, however, we will primarily use the word “solvent.”) A solvent is a liquid that dissolves solids, such as dried varnish. Thinner - a liquid that is used to dilute a stain, paint or varnish to reduce the viscosity.

Sometimes the liquid only dilutes the finishing compound; in other cases, it can not only dilute the varnish, but also dissolve the dried coating film. For example, a thick alkyd-oil or polyurethane varnish can be diluted with white spirit, but after drying, these varnishes do not dissolve in it. On the contrary, you can dissolve and dilute shellac with denatured alcohol (see the table at the end of the article).

Learn to understand these substances, without which most finishing methods are impossible. First, let's combine all liquids into main groups and find out how one group differs from another. Then we will consider the liquids included in each group and find out the differences between them. Having become familiar with the basic properties, you can understand how complex diluents, consisting of different substances, work.

The main groups of solvents

We will not now consider the special solvents that are part of the washes for varnishes and paints, as well as water, which is used to dilute finishing agents on water based and dissolves aqueous dyes. In addition to them, there are five main groups of solvents used in finishing processes: oil distillates(petroleum distillation products), alcohols, ketones, ethers and glycol ethers.

Turpentine could be ranked in the sixth group, but in terms of working properties it is very close to oil distillates, and it is better to include it in their group. Each of the five groups has its own characteristics. The most common are petroleum distillates, also called hydrocarbons, since the molecules of these substances are composed of carbon and hydrogen atoms. Included in this group liquids are obtained by separating oil into fractions at different temperatures. Turpentine is also a distillation product, but instead of oil, the raw material for its production is resin. conifers.

Petroleum distillates are used to dissolve and dilute waxes, oils and varnishes on oil based(including polyurethane). Many of them (such as white spirit, kerosene, liquid paraffin and paraffin) have properties that make them look like wax or oil and are often used as components in lubricants and furniture care products. Less oily distillates such as toluene or xylene can easily remove oil and grease and are used for degreasing.

All oil distillates and turpentine can be mixed in any proportion. Compared to white spirit, turpentine is more oily and evaporates more slowly. Toluene and xylene are part of complex (complex) solvents and thinners for varnish, removers for acrylic paints and thinners for some two-component varnishes. With their help, even dried IVA glue can be removed. Oil distillates are also used to dilute commercially produced oil-based stains.

Alcohols used as thinners and solvents for shellac and alcohol dyes, as well as components of thinners for varnishes. Ketones and ethers are used as solvents and thinners for nitrocellulose varnishes and paints.

Glycol ethers(eg cellosolve is a trade name for ethylene glycol) also dilute and dissolve nitro lacquer and is often used as a binder in water-based stains and finishes. Thanks to these solvents, the latex particles of the composition combine and form on the surface of the wood protective film after the water evaporates from the coating.

Differences within each group

The essence of the differences between the liquids of each group is the same: the smaller the molecules of a substance, the faster they volatilize (evaporate), and vice versa, a liquid consisting of large molecules dries out slowly. In addition, large molecules, after drying, often leave a greasy or waxy coating on the surface, while smaller molecules volatilize, as a rule, without a trace. The scheme "Petroleum distillates" will help you to visualize the differences in substances of one group, with which you most often have to deal. The smallest molecules in this group are methane, which evaporates so quickly that it is in a gaseous state at ordinary temperatures.

Methane is followed by ethane, propane, butane, etc., in terms of the degree of increase in molecular size, up to octane, a rapidly evaporating liquid that serves as the main component of automobile fuel. This is followed by solvent and white spirit (petroleum solvent is less oily and evaporates faster than white spirit). Toluene and xylene - volatile liquids with a pungent odor - are obtained from solvent and white spirit. Manufacturers separate toluene and xylene, and the remainder is sold as odorless white spirit, which is weaker than regular white spirit, but wax dissolves in it and is suitable for diluting oils and oil varnishes. Toluene and xylene evaporate very quickly without leaving any residue. The next liquid with even larger molecules is kerosene. It is very oily and hardly evaporates at room temperature. After kerosene comes mineral oil, which has all the properties of real oils, which practically do not evaporate. And finally, petroleum wax, or paraffin, is one of the main products of petroleum distillation. At room temperature, it is not a liquid, but solid melting when heated.

So, we have listed almost all the main substances included in the group of petroleum distillates. Alcohols, ketones, ethers and glycol ethers differ from each other in the same way - the smaller the molecules, the faster they volatilize, and liquids consisting of large molecules evaporate slowly. Of these four groups, only alcohols and ketones are available and widely used in decoration. In the group of alcohols, methanol (wood alcohol) evaporates most rapidly, much faster than ethanol - the alcohol contained in alcoholic beverages and also called wine alcohol. Ethanol as food alcohol is subject to high excise duties, and to avoid taxation, toxic substances (usually methanol) are added to it, making it undrinkable. This mixture is called denatured alcohol or shellac solvent. Methanol itself is highly toxic and should only be handled outdoors or in a special painting booth with powerful ventilation.

In the ketone group, acetone evaporates faster than methyl ethyl ketone (MEK). The rest of the ketones volatilize slowly. You can recognize a solvent using the suffix in its name. Alcohols have the suffix "-ol" (methanol, ethanol), ketones have the suffix "-one" (acetone, methyl ethyl ketone), ethers have the suffix "-at" (methyl acetate, ethyl acetate, etc.). In the names of liquids from the group of glycol ethers, as a rule, the word "ether" is present. But don't let all of these names mislead or deceive you. In most cases, you only need to remember the five main groups, each of which is used to dissolve or dilute certain substances. Within each group, the differences between the liquids included in it are not so significant and consist, basically, only in the rate of their evaporation.

Thinner for nitro varnish

Having familiarized yourself with the main properties of the various groups, you will be able to understand how the combined solvent for nitronellulose varnishes works. Being a mixture of several substances, it can have a different evaporation rate, and its properties depend on the composition and proportion of its constituent components.

The main substance of the varnish is the mine molecules of nitrocellulose, which, under a high magnification under a microscope, look like spaghetti. So that they do not stick to each other and it is more convenient to apply varnish by spraying, it is required a large number of liquids. If the molecules collide, being too close to each other, the varnish becomes viscous, and when it is sprayed on the surface of the film, the so-called shagreen, resembling the skin of an orange, is formed.

For spray application, the varnish must not be viscous; a small amount of solvent is enough to separate the nitrocellulose molecules from each other. The composition of a solvent for nitro lacquers usually contains about 40-50% of the active substance, which is a solvent for lacquer molecules: acetone, ether or glycol ether. The rest can be any liquid that serves as a kind of "diluent for the solvent". Usually, oil distillates are used, which do not dissolve the varnish, but only dilute it even more. These fluids are generally relatively inexpensive and can reduce the cost of a combination solvent for nitro varnishes. Approximately 50-60% of this combination solvent is diluent. Most often, toluene, xylene or their mixture are used, and sometimes an oil solvent is included in the solvent. The cost of the combined solvent can be reduced even more by replacing part of the active solvent with alcohol, more often with methyl alcohol. Although alcohols do not dissolve nitrolacquer by themselves, they drastically reduce its viscosity when mixed with acetone or another active solvent. Therefore, in addition to the active solvent and diluent, combined solvents often contain a little alcohol, which serves as a so-called latent (latent) diluent.

Knowing these properties, you can find out what is sold under the name of a nitro varnish and shellac remover, which is often used by amateurs to renew finishing coatings furniture. As a rule, this is a common combination solvent. You can verify this by reading the names of the components on the label. To be used as a nitro varnish diluent, the combined solvent must have a carefully selected composition. Sufficient active solvent and latent diluent are required to completely dissolve the nitrocellulose molecules. Otherwise, the molecules stick together into tiny lumps, and a whitish bloom often forms on the lacquer film, well known to many carpenters who use nitro lacquer for finishing. If you are faced with this phenomenon and the applied varnish has turned white, light sanding of the dried varnish film and spraying over it with a solvent will help to correct the situation, which will restore its shine and transparency. (Retail combo solvents usually contain an insufficient percentage of active solvent. To successfully correct a bleached nitro lacquer film, we recommend adding some pure acetone to the commercial solvent to completely dissolve the lacquer particles.)

Manufacturers often state that only the combined solvent they produce is suitable for working with their nitro varnish. However, if you do not have any problems with the behavior of the varnish film, then there is no reason to switch to the solvent recommended by the manufacturer. If you apply nitro lacquer using a spray, then you probably managed to notice its unique property of being well adhered to vertical surfaces... It doesn't flow down like oil varnish, shellac or aqueous formulations, and with careful work, drips will not form. The reason for this property lies in the long molecules of nitrocellulose and the rapid evaporation of the diluent. As soon as a jet of thinned varnish exits the spray gun nozzle and turns into tiny droplets of mist, the thinner evaporates and the molecules begin to stick together again. Having reached the surface of the product, the varnish acquires a high viscosity and does not run off. The remaining solvent is only enough to level the varnish film, then these residues evaporate.

The percentage of active solvent in the product different manufacturers may be different; for this reason, the properties of combination solvents can be very different, since they are mainly influenced by the rate of evaporation of the active solvent. Combined solvents on sale can be roughly divided into three categories: standard solvents for nitro-varnish and nitro-enamel, evaporating at a "normal" rate; so-called leveling, which evaporate more slowly than standard; and fast (usually sold in car care stores), evaporating faster than others. Unfortunately, manufacturers do not have binding standards, so you have to experiment with choosing a combination solvent with an optimal evaporation rate among all three categories. However, mixing solvents from different categories can achieve the desired result. Under normal conditions (at a temperature of 24 ° C and an air humidity of 40%), the evaporation rate of a standard combined solvent is optimal, but in cold weather (5 ° -15 ° C), nitro varnish diluted with this solvent dries very slowly. With prolonged drying, more dust particles have time to settle on the surface of the varnish film, and they are embedded in the varnish. The finishing process slows down significantly. Drying can be accelerated by using a fast solvent or partially adding it to the standard one. In hot weather, nitro lacquer droplets simply do not have time to spread over the surface to form an even film. At times, they can even dry out in the air before they lie on the surface.

The coating is rough and dull. If the surrounding air is not only hot but also humid, the droplets of varnish trap moisture and the coating film becomes whitish. Three problems (poor spray, premature drying and whiteness) can be eliminated at once by using a slow solvent or adding it to a standard one. If you live in a very humid climate and the slow thinner you are using does not get rid of the lacquer tendency, try other manufacturers' products to find a better one. Slow solvents can be used to tackle pebbles, to apply varnish with a brush, or to finish intricate items such as chairs or interior walls of cabinets and drawers, where some of the varnish settles on already dried surfaces. It is often possible to achieve an optimal result with combined solvents only with the help of experiments, since manufacturers do not inform about the evaporation rate of their solvents, and the drying time of the nitro lacquer coating has to be determined by trial and error. But with some experience and using the same brands of solvents, you will be able to fully control the finishing process.

Safety when working with chemical solvents and thinners

V last years more and more finishing compounds water-based and safe washes, and this forces many to take a closer look at organic solvents and their effect on environment... Undoubtedly, the future of joinery is water-based, but it takes time to complete the transition. Nevertheless correct use and solvent storage remains an acute problem for small workshops.

Indeed, how many of us realize that solvent vapors are a greater threat than liquids? By learning some information, you will be more attentive to potentially hazardous substances and can reduce the risk to a minimum.

White Spirit – liquid product distillation of oil, used as a thinner and agent for removing wax and oils, and washing brushes. It lowers the viscosity, allowing deeper penetration into the wood and accelerating the drying of oil-based formulations. In terms of the rate of evaporation, it occupies an intermediate position between the slowly evaporating turpentine and the rapidly volatilizing solvent. Almost odorless, which makes it difficult to determine the excess amount of its vapors in the air. Fortunately, white spirit is considered one of the safest solvents.

Turpentine- the liquid obtained by distilling the resin of coniferous trees. Used as a thinner and cleaning agent to remove oil contamination. Due to its slow drying, it may be preferable to white spirit in some cases. Possesses strong unpleasant odor... Relatively safe in contact with skin, except for people with hypersensitivity. However, it is flammable and can sometimes ignite spontaneously. Never store rags soaked in turpentine, even soaked in water, in the workshop.

Oil solvent- evaporates quickly, which in some cases can be useful, but at the same time it is also highly flammable. Remember the main rule: if a solvent evaporates quickly, it has low temperature flash, therefore fire hazard. Do not use flammable liquids such as solvent or combination solvent indoors, the vapors of which may be ignited by the slightest spark in electrical outlet or a switch. The solvent is commonly used to remove traces of wax and oil, and to soften and polish shellac-based mastics.

Solvents for nitro varnish- a mixture of several liquids, the properties of which differ depending on the brand. For best compatibility, it is generally recommended to use a solvent and varnish from the same manufacturer together. Solvents have a pungent odor and this makes handling them unpleasant. When added to nitro varnish, they improve the flow and leveling of the coating film, making the gloss more uniform. They also provide better adhesion due to more deep penetration into wood and speed up drying. Like the solvent, it is not recommended for indoor use due to its high fire hazard.

Methanol Is a very effective solvent and thinner for shellac and other alcohol-based compounds, but it causes corrosion of many metals and deterioration of finished coatings. Despite its excellent working properties, it is one of the most hazardous solvents. For safety, it is better to replace it with ethyl or isopropyl alcohol. Methanol, like methylene chloride, requires very careful handling. Regular carbon filters respirators do not retain vapors of these solvents. When purchasing a respirator, find out if it is designed to work with these substances. Remember - not all respirators are created equal.

When working with any organic solvents and thinners, observe the rules fire safety and personal hygiene, so as not to jeopardize your health and life. Make the workshop a place to work without fear of trouble.

What solvent what to dilute, dilute - table

Polyurethane paint (enamel UR 1012)
Polyurethane paint UR 1012 is a two-component system consisting of a semi-finished product of enamel and a polyisocyanate hardener, mixed before use.
Semi-finished enamel product is a suspension of pigments and fillers in a solution of polyester acrylate resin with the addition of solvents and targeted additives.
Polyurethane paint (enamel UR 1012 ) is intended for corrosion protection internal surfaces tanks, cisterns, storage facilities for light oil products, pumping and storage equipment, operated in an open industrial atmosphere of temperate, cold, maritime and tropical climates, as well as in an atmosphere containing corrosive agents.
The coating system, consisting of polyurethane enamel applied to the primed surface, retains protective and decorative properties in an open industrial atmosphere of temperate and cold climates - 12 years, in an atmosphere of a marine and tropical climate - 5 years, subject to the established application technology, storage and transportation rules ...
Polyurethane paint (enamel UR 1012 ) is issued different colors according to the RAL color chart.
Surface preparation for painting .
The surface to be painted must first be cleaned of mechanical impurities, water-soluble salts, fats, oils. Degreasing is carried out with a cloth moistened with solvent, xylene, acetone or other aromatic solvents.
The surface must be dry and clean before painting.
Cleaning from rust, scale, residues old paint made by hand or mechanically up to St 2 or by shot blasting (sandblasting) method up to the SA2 - SA2.5 grade according to international standard ISO 8501-1: 1988. This cleaning gives the required adhesion.
Preparation of polyurethane paint to application.
Before use, semi-finished polyurethane paint (enamel UR 1012 ) mix thoroughly and add the required amount of hardener, mix, hold for 15-20 minutes. If necessary, polyurethane paints are diluted to a working viscosity according to a VZ-246 viscometer with a nozzle diameter of 4 mm at a temperature of (20.0 ± 0.5) 0C with a R-5A solvent (according to GOST 7827-74) or a mixture of xylene (according to GOST 9410-78 or GOST 9949-76) and butyl acetate (according to GOST 8981-78) in a ratio of 4: 1. Recommended working viscosity when applied by brush or roller - 35 s, pneumatic spray - 8-22 s, airless spray - 45 s.
Polyurethane paints (enamels UR 1012 ) after dilution, thoroughly mix again and filter through a sieve with a mesh of 0.1N-0.2N in accordance with GOST 6613-86 or a similar sieve of imported production, or a mesh of synthetic fabric (nylon, polyester or polyamide) with a nominal hole size of 100-200 microns according to GOST 4403-91.
Dyeing .
Polyurethane paints (enamels UR 1012 ) is applied to the surface by pneumatic and airless spraying, brush or roller in 1-2 layers at an ambient temperature of 5 to 350C and a relative humidity of not more than 80%.
Polyurethane paintsapplied on a surface pre-primed with FL, EP primers.
Theoretical consumption of polyurethane paint (enamels UR 1012 ) on a single layer coating 80-110 g / m2.
Practical coverage depends on application method, surface preparation and product configuration.
Guarantee period storage of semi-finished products - 12 months from the date of manufacture.
The shelf life of polyurethane paint (a mixture of a semi-finished product with a hardener) is at least 6 hours.
You can buy from us polyurethane paints sUR 1012price: