WHAT IS WATER-BASED PAINT?

Water-based paint is a type of paint that uses water as the dispersion medium or main solvent. Film-forming ingredients are usually acrylic resins, styrene acrylic, water-dispersible polyurethane (PUD) or water-based epoxy depending on the intended use.

After application, the water evaporates and the plastic particles bond together to form a durable paint film on the surface of the material. By using water instead of organic solvents, this type of paint has significantly lower volatile organic compound (VOC) content than many traditional paint lines, contributing to reducing odor and being more friendly to the environment and users.

WHAT IS ALKYD ORIGINAL PAINT?

Alkyd-based paint is a paint line that uses Alkyd resin as a film-forming agent and often uses organic solvents such as mineral spirits or hydrocarbon solvents to adjust viscosity.

A characteristic feature of Alkyd paint is that the curing process takes place through an oxidation reaction with oxygen in the air. After the solvent evaporates, Alkyd resin continues to react with oxygen to form a hard and well-adhered paint film.

Thanks to this property, Alkyd paint has long been widely used in painting metal, steel structures, machinery, iron doors, railings, industrial equipment and many outdoor applications.

COMPARISON OF INGREDIENTS AND DRYING MECHANISMS

The biggest difference between the two paint systems lies in the composition and film formation method.

Water-based paint dries mainly through the evaporation of water combined with the bonding of polymer particles. Some two-component paint lines also have a chemical curing reaction to increase durability.

Meanwhile, Alkyd paint goes through two stages including solvent evaporation and oxidation reaction. Because it takes time for oxygen to diffuse into the paint layer, many Alkyd paints take longer to dry completely than water-based paints.

ADHESION

Both paint systems have good adhesion if the surface is treated properly.

Alkyd paint usually adheres very well to steel, cast iron, wood and appropriately primed surfaces. This is the reason this type of paint is still commonly used in the mechanical and steel structure industries.

Modern water-based paint also achieves very high adhesion thanks to the development of acrylic and polyurethane resin technology. Many products can be used on concrete, walls, wood, metal or composite materials when combined with the appropriate primer.

OUTDOOR DURABILITY

Weather resistance depends on each resin system and product formulation.

Water-based paints using high-quality acrylic resin often have very good UV resistance, long-lasting color retention and are less susceptible to chalking when used outdoors.

Meanwhile, Alkyd paint has beautiful gloss and high mechanical durability, but if exposed for a long time to strong sunlight, some lines Alkyd Traditional products may yellow or lose luster over time.

RESISTANCE TO CORROSION

For metal structures, Alkyd paint combined with anti-rust primer is still a popular choice thanks to its good protection ability in normal environments.

However, in marine, chemical or heavy industrial environments, both water-based and Alkyd paints are often replaced by higher performance paint systems such as epoxy, polyurethane or fluoropolymer to meet long-term corrosion protection requirements.

PAINT SMELL AND ENVIRONMENTAL FACTORS

This is one of the most noticeable differences.

Water-based paint usually has a light odor, low VOC content, is easy to clean tools with water and is suitable for homes, schools, hospitals, offices as well as projects that require limited emissions.

In contrast, Alkyd paint has a clearer solvent smell, requires the use of specialized thinners and requires good ventilation during application.

CONSTRUCTION AND MAINTENANCE

Water-based paint has the advantage of drying quickly, being easy to apply, easy to clean tools and shortening the time to complete the project.

Alkyd paint has good self-leveling ability, creates a beautiful glossy surface and is often highly appreciated in applications that require aesthetics on metal or wooden furniture. However, drying time is longer and cleaning tools after construction also takes more effort due to the use of solvents.

SHOULD I CHOOSE WATER-BASED PAINT OR ALKYD-BASED PAINT?

If you prioritize environmental friendliness, low odor, quick construction and use for houses or civil works, water-based paint is the right choice.

If you need a paint layer with high gloss, smooth surface and application on iron doors, railings, machinery or metal structures under normal environmental conditions, Alkyd paint is still an effective and affordable solution.

For industrial projects with very high anti-corrosion requirements, the selection should be based on the entire paint system (primer, intermediate paint and topcoat) instead of just comparing between Alkyd and water-based paint.

DEVELOPMENT TREND OF TWO PAINT SYSTEMS

In recent years, the global paint industry has been shifting strongly to water-based products to meet increasingly stringent regulations on VOC emissions and environmental protection. Acrylic, polyurethane and resin technology epoxy Water-based products are constantly being improved, helping to improve weather resistance, abrasion resistance and adhesion on many types of materials.

Meanwhile, Alkyd paint still plays an important role in many fields thanks to its reasonable cost, ease of application and beautiful surface quality. At the same time, improved Alkyd lines such as urethane-modified Alkyd, High Solids Alkyd and water-based Alkyd are also being developed to reduce solvent emissions while still maintaining the inherent advantages of the system. Alkyd resin.

Water-based paint and Alkyd-based paint both have their own advantages and no one type is absolutely superior in every application. Water-based paint stands out for its environmental friendliness, low odor, quick drying and good color retention, while Alkyd paint is highly appreciated for its gloss, self-leveling ability and effectiveness on many metal and wood surfaces. Choosing the appropriate paint system should be based on actual usage conditions, technical requirements, working environment and desired lifespan of the project to achieve optimal protection and aesthetics.

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