The presence of foam in paint has always been a problem for paint manufacturers. Therefore, paint defoamer has become an indispensable helper in paint production. However, in the process of use, many people will have such a problem, to deal with the foam problem, why should the defoamer be added twice? For this question, let's follow the editor to see below.
Application of Coating Defoamer
In the category of defoamers for coatings, the components, properties, and effects of defoamers are different. Therefore, before choosing a defoamer for coatings, the first thing we should do is to find out whether the foaming liquid is in the foam. There are components that can stabilize foam and systems of foaming liquids, such as acrylic emulsions, water-soluble resins, oil-based paints, etc. The defoamers applicable to these systems are different, and the specifics should be verified based on experimental data.
Defoamer for Coating
The reason why it is added to the paint in two times is that adding too much water-based paint defoamer at one time will cause oil drift, shrinkage, and emulsification. Too little will result in poor results and small bubbles will remain. It is divided into two additions. The first time is to react with the original solution and play a role in suppressing foam. It is added in the stage of grinding raw materials. The second addition is in the paint mixing stage, in order to eliminate some foam that cannot be suppressed in the early stage. Compared with the effect of direct addition at one time, unnecessary costs will be reduced, and if it is added in two times, it will be easier to stir evenly each time. Not only that, adding it in two times can also prevent the problem of re-foaming. This is because there is a high shear condition in the environment of part of the construction process, which will test the long-lasting defoaming ability of the defoamer.
The above is the reason why the coating defoamer brought to you by Nanhui Defoamer is divided into two additions.
Guangdong Nanhui New Material Co., Ltd. has been focusing on the production of defoamer for many years. Selling high-quality and inexpensive defoamer to major user industries, the products have been well received and received a large number of repeat customers. For more information on defoamer, please call: 86 13428601010