As one of the indispensable materials in the fields of architecture and industry, the coating effect of coatings directly affects the appearance quality and durability of products. However, in the production and construction of coatings, the production of foam often affects the uniformity and adhesion of coatings, thereby reducing the coating effect. Therefore, defoamers in the paint industry have become essential for improving the coating effect.

The main reasons for foam formation in the production and construction of coatings are the introduction of air during mixing, the active ingredients of pigments and additives, and the viscosity of coatings themselves. The existence of foam will lead to uneven and orange peel on the coating surface, which will seriously affect the coating effect. Therefore, the use of defoamer has become an inevitable choice to control foam and improve coating quality.

The commonly used defoamers in the coating industry include organosilicon, polyether, and mineral oils. Different types of defoamers have different defoaming mechanisms and applicable ranges. Organosilicon defoamers are suitable for high-temperature coatings and anti-corrosion coatings due to their efficient defoaming ability and good heat and acid alkali resistance; Polyether defoamers are suitable for water-based coatings and latex paints due to their good water solubility and compatibility with coatings; Mineral oil defoamers have been applied in certain solvent based coatings due to their lower cost and stable defoaming effect.

The timing and method of application of defoamers are crucial in the production process of coatings. Generally speaking, defoamers can be added at various stages such as pigment dispersion, resin dissolution, additive addition, and coating mixing and stirring. Depending on the type of coating and production process, the amount of defoamer added also needs to be precisely controlled. Excessive defoamer may affect the leveling and glossiness of the coating, while insufficient addition may not achieve the desired defoaming effect.

In addition, process parameters such as temperature and stirring speed during the coating production process can also affect the effectiveness of defoamers. Therefore, in actual production, it is necessary to adjust the process parameters according to specific situations to ensure that the defoamer can fully exert its effect.

In addition to the use of defoamer in the production process, an appropriate amount of defoamer can also be added in the coating construction process to solve the foam problem. For example, if foam or bubbles are found on the coating surface during spraying, roller coating or brush coating, the construction can be stopped immediately and an appropriate amount of defoamer can be added for remedy. The production of foam can also be effectively reduced by adjusting the construction method and controlling the construction environment, such as temperature and humidity.

With the increasing awareness of environmental protection and the increasingly strict environmental regulations, the demand for environmentally friendly defoamers in the coating industry is growing. Traditional defoamers may contain harmful substances that pose potential threats to the environment and human health. Therefore, developing and producing environmentally friendly defoamers has become an important task at present. Environmentally friendly defoamers should have the characteristics of being non-toxic, odorless, and easily degradable, and should not have a negative impact on the environment and human health during use.

Defoamers in the paint industry are important auxiliary materials for improving coating effectiveness. By selecting appropriate defoamer and applying it correctly, the production of foam can be effectively controlled, the uniformity and adhesion of the coating can be improved, and the coating effect can be improved. In the future, with the continuous development and promotion of environmentally friendly defoamers, the coating industry will become more green, environmentally friendly, and sustainable.