The coating system is prone to foam problems. Foam will affect the performance of the coating film and the construction effect will be worse. The foam can be suppressed by adding water-based paint defoamers. This article analyzes the hazards of paint bubbles and provides solutions for defoaming.
(Picture: The hazards of paint blistering)
The harm of paint foams
With the rapid development of industry and the improvement of people’s living standards, the requirements for product quality are getting higher and higher. If the paint shrinks when it is used, it will not only affect the protective effect of the coating film, but also greatly affect the quality of the coating film. Decorative effect.
Bubbles are tiny bubbles with a diameter of several millimeters that appear on the surface of the coating. It is a heterogeneous system in which insoluble gas enters the liquid under external force and is isolated by the liquid. The bubbles in the coating are the dispersion form of the gas in the coating liquid. It is a typical thermodynamically unstable two-phase system: the presence of bubbles increases the surface area of the coating system, that is, increases the energy of the system; when the bubbles burst, the system The total surface area is greatly reduced, so the energy is reduced accordingly. Therefore, the coating system with bubbles is always in a thermodynamically unstable state.
In the paint production process, air bubbles appear as an interference factor, causing surface defects in the application of the paint product, which not only damages the appearance, but also affects the corrosion resistance and weather resistance of the coating film. Air bubbles are usually due to insufficient adhesion of the coating film. For anti-corrosion coatings, it is often the first appearance of its insufficient anti-corrosion ability.
(Picture: Causes of paint foaming)
Water-based paint for defoaming solutions
Paint bubbles will have a negative impact on the construction effect. How to eliminate paint blistering? Adding defoamer is a very simple method. Defoamers are additives generally used in coating preparation. It mainly plays the role of defoaming and suppressing foam.
Nanhui defoamer manufacturer, in view of the phenomenon that water-based paint is prone to foaming when it is prepared or used, the water-based paint defoamer developed and designed is a type of compound paint defoamer, which can quickly eliminate foam without shrinkage. , Does not affect the characteristics of coating film performance.
(Picture: Free sample of Nanhui water-based paint defoamer)
Advantages of Nanhui water-based paint defoamer:
1. The foam suppression time is long, which can suppress foam for a long time and inhibit foam regeneration;
2. The performance of this defoamer is stable, and it can continue to defoam and suppress foam under strong acid and alkali environment;
3. The concentration of defoamer is high, and the addition amount is very small. The general dosage is about one thousandth to three thousandths of the coating system;
4. Fast defoaming. The surface tension of this defoaming agent is low and can penetrate quickly, resulting in poor surface tension and eliminating foam.
Nanhui is a manufacturer with years of application experience. It has far more defoaming technology than other antifoaming agents in the market. From the above cases, we prove the strength of our Nanhui defoamer. We have a group of excellent defoaming engineers, and an independent laboratory that facilitates defoaming experiments with foams that are difficult for customers to solve. If you want to know more about defoamer products, you can call our hotline: +86 13428601010.
This article is from the manufacturer of Nanhui defoamer (http://www.nhdefoamer.com/), please indicate the source if you need to reprint.
