Defoamers for water-based coatings can achieve defoaming effect mainly by destroying the surface tension of foam or changing the stability of foam film. The active ingredients in its molecular structure can quickly penetrate into the foam, reduce the mechanical strength of foam membrane, promote the foam to burst, and effectively inhibit the formation of new foam.

The main reasons for the foaming of water-based coatings include the mixing of air during the mixing process, the retention of bubbles caused by uneven construction surfaces, and the effect of surfactants in water-based coatings. In addition, improper environmental temperature, humidity, and coating formulation may also cause foaming.

Water based paint defoamers are mainly divided into organosilicon, mineral oil, polyether, and modified polysiloxane. Various defoamers have different characteristics, such as silicone defoamers, which are efficient and long-lasting, but may affect the glossiness of coatings; Mineral oil defoamers have a lower price, but may affect the water resistance of coatings.

With the increasing awareness of environmental protection, environmentally friendly water-based paint defoamers are becoming more and more popular in the market. This type of defoamer usually has the advantages of low VOC emissions, non-toxic and harmless, and good biodegradability, which can effectively reduce the harm to the environment and human health.

When selecting water-based coating defoamers, it is necessary to comprehensively consider factors such as defoaming effect, compatibility with the coating, impact on coating performance (such as glossiness, water resistance, etc.), cost, and environmental performance.

Taking a certain automobile manufacturing plant as an example, by introducing efficient and environmentally friendly water-based paint defoamers, the problem of paint foaming on the production line has been successfully solved, improving coating efficiency and product quality, while reducing VOC emissions, achieving a win-win situation of economic and environmental benefits.

Water based paint defoamers should be stored in a cool, dry, well ventilated place, away from direct sunlight and high temperatures. During transportation, attention should be paid to moisture, heat, and impact prevention to ensure stable product quality.