In the coating industry, the production of foam is often the key factor affecting the coating effect and construction efficiency. The importance of defoamers in coatings as key additives to solve this problem is self-evident. This article aims to provide a basic overview of defoamers for coatings, including their definition, classification, and principles of action.

Paint defoamer is a chemical substance that can quickly destroy the foam structure in the paint and inhibit the formation of foam. They can ensure the smoothness and uniformity of the coating in the construction process by reducing the surface tension, increasing the foam bursting speed or changing the foam surface properties.

There are various types of defoamers for coatings, which can be divided into organic silicon, mineral oils, polyethers, fatty acid esters, etc. according to their composition; According to the shape, it can be divided into liquid type, solid powder type, lotion type, etc. Different types of defoamers are suitable for different coating systems and process conditions.

The action principle of defoamer mainly includes three aspects: surface tension reduction, foam structure destruction, thickening and inhibition. These mechanisms work together to ensure that the foam in the paint is effectively controlled.

As an important additive in the coating industry, defoamers play a crucial role in improving coating quality and construction efficiency. Understanding its basic concepts and classifications can help in better selecting and applying such products.