The choice of material for marking depends on the basis on which road paint will be used in specific conditions of the highway or parking. The base is determined by the type of binder that holds the pigment and fillers on asphalt or concrete, ensuring the adhesion and longevity of the line. An error in determining the base leads to rapid abrasion of the marking, flaking of the film or the inability to carry out work in the required weather windows.
Modern technologies for the production of paints for road works offer several chemical bases, each of which has its own advantages and limitations. Water dispersion It is considered the most environmentally friendly, alkyd They provide a high level of resistance, and chloro-recurrence The compositions are irreplaceable in the cold season. Understanding the chemical nature of the binder allows you to choose the right solvent, equipment for application and calculate the economic efficiency of the project.
Water-dispersion compositions: environmental friendliness and speed
Water base road paint is the standard for most works in the warm season, as the solvent in it is ordinary water. Such materials are often called acrylic or latex, because these polymers create a strong film after the evaporation of moisture. The main advantage is the absence of a sharp smell and fire safety during storage and transportation, which simplifies logistics at facilities with strict safety requirements.
adhesion water paints to dry asphalt is achieved by deep penetration of the emulsion into the pores of the coating. However, there is a critical nuance: application is possible only at an air temperature not lower than +5 ° C and humidity not more than 80%. If you apply the material on a wet base, the water will not evaporate, and the film will not form, which will lead to washing off the markings with the first rain.
- 🎨 Fast drying (15-40 minutes) allows you to open the movement in the shortest possible time.
- 🌿 The absence of toxic fumes makes the composition suitable for work in tunnels and closed parking lots.
- 💧 Easy cleaning of equipment with water immediately after completion of work, without the use of aggressive chemicals.
To improve visibility at night, water-dispersion paints must be added retroreflective microspheres that are embedded in the still dry layer.
Alkyd and oil bases: classical strength
Alkyd paints, often referred to as oil paints, are based on alkyd resins and organic solvents such as white spirit or solvent. This type of material has historically been used longer than others and has proven to be a reliable solution for high-intensity roads. Film produced alkyd-bindingIt has high elasticity and resistance to temperature changes, which prevents line cracking during expansion and compression of asphalt.
The drying process here occurs not only due to the evaporation of the solvent, but also due to oxidative polymerization in contact with oxygen of the air. This ensures the formation of a very dense and chemically resistant layer. However, the drying time of such compositions is much higher than that of aquatic analogues, and can range from 30 minutes to 2 hours depending on weather conditions and layer thickness.
⚠️ Warning: Alkyd paints are flammable and require special storage conditions. Work with them should be carried out in a good ventilator!To increase wear resistance, modifying additives and plasticizers are often introduced into the composition. Thyxotropic properties modern alkyd materials allow them to be applied without undertone even on vertical surfaces of curbs or signs, which expands the scope of their application.
Chlorocaucucasants for extreme conditions
When the question arises on what basis road paint will withstand winter operation or application at negative temperatures, the answer is chlorin rubber compositions. The basis here is a solution of chlorinated rubber in a mixture of organic solvents. The uniqueness of the technology lies in the ability of the material to dry even at temperatures up to -10 ° C, which makes it the only option for winter road markings.
The high evaporation rate of solvents allows you to form a durable film in 10-15 minutes, even in the cold. Chlorocauchuc has excellent adhesion old coatings and can be applied over existing markings without first removing, if it does not have serious defects. This significantly reduces the labor costs of line restoration.
Technology of application of chlorin rubber
It requires a thorough cleaning of the surface from snow and ice. The temperature of the material itself should be at least 15 ° C, so the containers are often heated. Work is carried out in overalls due to the high concentration of solvent vapors.
Two-component epoxy and polyurethane systems
Two-component trains are used for extreme load areas, such as intersections, public transport stops and industrial site entrances. The basis of such paints is epoxy or polyurethane resins, which are mixed with a hardener immediately before application. As a result of a chemical reaction, a coating is formed that is stronger than the asphalt itself.
The main difference from single-component materials is the irreversibility of the drying process. If the ordinary paint simply dries, the two-component polymerizes, creating a mesh structure of macromolecules. Epoxy foundations provide phenomenal resistance to abrasion of studded rubber and exposure to fuel (combustible and lubricants).
Parameter Water base alkyd Two-pronged Drying time 15-40 minutes 30-120 minutes 15-30 minutes Term of service 6-12 months. 12-18 months. 24-36 months. Application temperature from +5°C -5°C -10°C Resistance to FSM Low. Medium Tall. Two-component paints do not require the addition of microspheres to the mass, since high adhesion allows you to apply them on top of the reflectors already embedded in the asphalt or use a special sprinkle.
Thermoplastic Materials: Hot Application
Although technically not quite a “paint” in liquid form, thermoplastic is an essential material for marking, where the basis is thermoplastic resins. The material comes in the form of solid pellets or blocks and requires heating to 180-220°C to enter the working state. After cooling, the mass hardens, forming a layer of 1.5-4 mm thick, which is impossible to achieve with liquid paints.
The basis of thermoplastic can be oil-polymer or based on canifoli. Such materials provide better visibility in the rain due to the relief and the possibility of forming profiles (noise strips). Thermoplastic markings It lasts for 2-3 years or more, withstanding the most intensive traffic flows.
- 🔥 It requires special smelting and marking equipment (kohers).
- 🛣️ Ideal for highways and places with high truck traffic.
- 📉 The high initial cost is compensated by a long service life.
Criteria for the selection of the basis for different types of surfaces
The choice of what basis will be the road paint, dictated not only by the budget, but also by the type of base. For fresh asphalt, which still contains bitumen oils, some types of water paints without pre-priming are not suitable, since detachment can occur. Concrete coatings with high porosity and alkaline reaction require materials with high penetrative power or special primers.
The seasonality of the work is also taken into account. If you need to mark the road in late autumn or early spring, when temperatures are unstable, the use of water dispersions is risky. In such cases, the chloro-recurrence or fast-drying alkyd compounds, sacrificing environmental friendliness for the sake of guaranteed results.
☑️ Checklist before purchase
Done: 0 / 5Frequently Asked Questions (FAQ)
Can you mix the paints of different bases?
It's not recommended. Mixing water and organ-soluble paint will lead to folding of the composition, loss of properties and defect when applied. Even paints of the same group, but from different manufacturers, can have incompatible chemical additives.
How to Dilute the Thickened Road Paint?
Depends on the base. Water paints are diluted with pure water (usually no more than 5-10% of the volume). Alkyd and chloro rubber - the appropriate organic solvents (white spirit, solvent, toluene), specified in the technical passport of the product.
Why does the paint peel off in a month?
The main reasons: application on a wet or dirty base, violation of temperature, lack of primer in problem areas or use of material with an expired shelf life. It is also possible non-compliance with the drying technology between layers.
What is the best paint base for parking in the shopping center?
For internal parking, water-dispersion acrylic paints are optimal due to the lack of odor and fire safety. For external parking lots with high cross-country traffic, it is better to choose alkyd or two-component compounds.