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In the vast coating industry, PE primers are widely used due to their excellent adhesion and corrosion resistance. However, the generation of foam in the preparation and construction of coatings is a common and urgent problem to be solved. Foam not only affects the construction performance of the coating, but also causes defects such as depressions, bubbles, and holes in the coating film. At this time, defoamers for PE primers came into being and became an important auxiliary agent in the coating industry.

Application scenarios of defoamers for PE primers

The generation of foam in PE primers mainly comes from two aspects:

One is the air introduced by the coating during mixing and stirring, and the other is the gas released by chemical reactions or volatile organic compounds. These factors change the surface tension of the coating system, and air is easily mixed into it to form foam.

The main function of defoamers for PE primers is to quickly reduce the stability of foam and accelerate the rupture of foam. It effectively controls and eliminates foam by reducing the surface tension of the coating system, destroying the balance of the foam film, and making the foam film thinner until it ruptures and dissipates.

In the field of metal corrosion protection, PE primer is widely used as a pretreatment coating for metal surfaces. By rationally selecting and applying PE primer defoamers, not only the foam problem in the metal surface coating process is solved, but also the uniformity and adhesion of the coating are significantly improved, extending the service life of the metal structure.

In short, although the defoamer for PE primer is not conspicuous, it is an important item to ensure the performance and construction quality of the coating. In the development process of the coating industry, it will continue to play its role as a silent guardian, helping the coating industry to move towards a more effective and environmentally friendly direction.