Fluorocarbon paint is a kind of coating with fluorine resin as the main film-forming material, which has good weather resistance, heat resistance, low temperature resistance, chemical resistance, and its unique non-bonding, low friction and other characteristics. After decades of development, fluorine-containing coatings have been widely used in many industries such as construction, chemical industry, electrical appliances, electronics, machinery, aerospace, and household applications. The defoamer for fluorocarbon paint is an additive commonly used for paint defoaming, and its application in coatings plays an important role in improving the stability of coatings. Let's take a look!
1. What are the hazards caused by air bubbles in fluorocarbon paint?
The hazard of foaming is that if there are many air bubbles in the coating, the surface of the coating will become uneven, and even the appearance quality of the coating will be affected. In addition, in harsh environments such as high temperature and humidity, the large amount of foam generated will also reduce the service life of the coating. The formation of air bubbles between the coating and the substrate can reduce the bond strength of the coating-layer interface, and in severe cases, even cause peeling and cracking. If a hole appears after coating, it needs to be repaired or recoated, which can increase the cost of the coating.
Second, the characteristics of defoamer for fluorocarbon paint.
The substance used as the main body of the defoamer must meet the following conditions:
1) Basically insoluble in foaming liquid;
2) Lower surface tension than soaking liquid;
3) It is easy to disperse in the foaming liquid;
4) It has good chemical inertness.
Silicone emulsion is usually a milky white emulsion with good flowability, it is chemically stable, heat resistant and physiologically good. Its ability to effectively disperse in both aqueous and aqueous phases makes it very versatile. Therefore, as a defoamer for fluorocarbon paint, it can well solve the problem of paint blistering, it can be quickly spread on the foaming liquid surface, and the faster it spreads, so its defoaming ability is very strong.
The above content is provided by the "Defeng defoamer source manufacturer", if you need **, please indicate the source.