Defoamer is a non-toxic and non-irritating additive, which is widely used in the coating industry. Because in the process of coating configuration, a large amount of foam will be generated due to raw materials or process problems, such as water-based polyurethane, which is often used in the configuration of water-based coatings, but because it contains a large amount of surfactant, it is very easy to foam. Therefore, it is necessary to use a specific defoamer for defoaming treatment. Today, let's take a look at the role of defoamer in the coating industry.
In water-based coatings
Today, with the increasing safety and environmental protection standards, the defoamer added to water-based coatings uses water as a diluent, which can well deal with the foam that appears in the production process of water-based coatings and maintain the aesthetics and high temperature resistance of water-based coatings. performance.
And because it does not contain harmful substances, it will not volatilize into the air, so it will not cause harm to the human body and will not affect the transparency of the water-based paint, easy to yellow and other defects.
Coating industry
In latex paint
In latex paint, the addition of defoamer can deal with the existing foam and inhibit the appearance of foam, in addition to reducing the cost, it can also better help the latex paint molecules to disperse evenly, making it finer and higher in whiteness. It can also improve the strength, water resistance and scrub resistance of the latex paint film, and has a small density, a certain suspension, and can play an anti-settling role.
In powder coating
In powder coatings, a large number of gaps between powder particles are filled with air. With the increase of temperature, the melting of powder coatings will cause these air to be wrapped to form bubbles, which will affect the appearance of the coating film. The addition of defoamer can prevent the generation of these bubbles and improve the powder coating rate and spray area. It can also increase the thickness of the paint film and improve the wear resistance and durability of the coating.
defoamer in paint
In wood coatings
The function of wood coatings is to better reflect the texture of the wood surface. If there is foam in the coating, it will seriously cover the texture of the wood. Therefore, it is necessary to add a defoamer, which can effectively reduce the problems caused by foam. The unnecessary cost of the paint film will not affect the transparency of the paint film while improving the gloss of the paint film.
If you have other questions about the application of defoamer in the coating industry, please contact us at 86 13428601010, and relevant technicians will analyze and answer them for you
