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Comparison of water-based and oil-based paints
Release time:
2018-09-06
Water-based paint is a coating that uses water as a diluent and does not contain organic solvents. It is free of benzene, toluene, xylene, formaldehyde, free TDI, toxic heavy metals, and has no toxic or irritating odor. It is harmless to the human body, does not pollute the environment, and the paint film is full, crystal clear, flexible, and has the characteristics of water resistance, abrasion resistance, aging resistance, yellowing resistance, fast drying, and easy use. It can be used on a variety of materials such as wood, metal, plastic, glass, and building surfaces. Oil-based paint, on the other hand, refers to a coating made with organic solvents. It contains volatile organic compounds (VOCs), which are not only toxic to humans and pollute the environment, but are also flammable and explosive; some varieties also
Water-based paint uses water as a diluent and does not contain organic solvents. It is free of benzene, toluene, xylene, formaldehyde, free TDI, and toxic heavy metals. It is non-toxic, odorless, harmless to humans, environmentally friendly, and the paint film is full, crystal clear, flexible, and has good water resistance, wear resistance, aging resistance, yellowing resistance, fast drying, and easy use. It can be used on various materials such as wood, metal, plastic, glass, and building surfaces. Oil-based paint, on the other hand, is made using organic solvents and contains volatile organic compounds (VOCs). In addition to being toxic to humans and polluting the environment, it is also flammable and explosive; some varieties also contain large amounts of toxic substances such as formaldehyde, benzene, and lead, making it an "invisible killer" that pollutes the environment and harms consumers' health. Furthermore, due to its inherent composition, oil-based paint has extremely demanding transportation conditions, but its contribution before the advent of water-based paint cannot be denied.
Advantages of Water-based Paint:
1. Water-based coatings use water as a solvent, saving a large amount of resources; they eliminate the fire hazard during construction; reduce air pollution; and only use a small amount of low-toxicity alcohol ether organic solvents, improving working environment conditions.
2. Water-based coatings can be directly applied on wet surfaces and in humid environments; they have good adaptability to material surfaces and strong coating adhesion.
3. Water-based coating application tools can be cleaned with water, greatly reducing the consumption of cleaning solvents.
4. The electrophoretic coating of water-based coatings is uniform and smooth. It has good leveling properties; the inner cavity, welds, corners, and edges can all be coated with a certain thickness of coating, providing good protection; the electrophoretic coating has the best corrosion resistance, and the salt spray resistance of thick-film cathodic electrophoretic coatings can reach up to 1200h.
Advantages of Oil-based Paint:
1. Corrosion resistance, water resistance, oil resistance, chemical resistance, light resistance, and temperature resistance, etc. Objects exposed to the atmosphere are eroded by oxygen, moisture, etc., causing metal rust, wood decay, and cement weathering. Applying oil-based coatings to the surface of objects forms a protective film that can prevent or delay the occurrence and development of these destructive phenomena, extending the service life of various materials.
2. Color, gloss, pattern, and smoothness, etc. Objects of different materials coated with oil-based coatings can obtain a colorful and gorgeous appearance.
3. Low price and easy to produce. Good brushing effect.
Disadvantages of Water-based Paint:
1. Water-based coatings have high requirements for the cleanliness of the construction process and the material surface. Due to the high surface tension of water, impurities easily cause pinholes in the coating.
2. Water-based coatings are highly corrosive to coating equipment and require corrosion-resistant linings or stainless steel materials, resulting in high equipment costs.
3. Baking-type water-based coatings have strict requirements for construction environment conditions (temperature and humidity), increasing the investment in temperature and humidity control equipment and energy consumption.
4. Water has a large latent heat of vaporization, resulting in high baking energy consumption. Cathodic electrophoretic coatings need to be baked at 180℃; while the drying time of latex coatings is very long.
5. High-boiling organic cosolvents produce a lot of oil smoke during baking, which condenses and drips onto the coating surface, affecting the appearance.
6. Water-based coatings have poor water resistance, resulting in poor stability of the coating and bath solution, and poor water resistance of the coating.
Disadvantages of Oil-based Paint:
1. Slow drying and poor physicochemical properties of the coating.
2. High content of substances harmful to human health, with harmful substances continuously releasing and volatilizing for a long time.
3. Very prone to yellowing, poor durability, and most of the coating quality has been replaced by synthetic resin paints with superior performance.
4. The coating is harder and more brittle, and is difficult to repair after damage.
5. Highly flammable and must be stored separately according to fire safety requirements.
Both oil-based and water-based paints have their own disadvantages. During decoration, it is necessary to consider where to use them, and understand both the advantages and disadvantages to avoid trouble with re-coating.
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