It is well known that the paint industry has always had foam problems. It can be said that this is a very normal phenomenon. However, the occurrence of foam during paint production or use will lead to low utilization of equipment and decline in product quality. The prolongation of the production cycle and the problems affecting the aesthetics of the product, fortunately, silicone coating defoamers can solve these problems well, but silicone coating defoamers can be divided into many types. Silicone coating defoamers can be divided into emulsion type, silicone oil type and polyether modified silicon type.
1. Emulsion type silicone coating defoamer
It is mainly a silicone oil emulsion made of silicone oil or silicone paste under its emulsification, which can effectively improve the dispersibility of silicone oil in the water-based system, and also accelerate its dispersibility. Emulsion-type silicone paint defoamer is a kind of silicone paint defoamer, so it can solve the paint foam of many water-based systems very well. The emulsifier mainly used in the production of this defoamer is non-ionic, and the effect of a single emulsifier is better when mixed with multiple emulsifiers. The most important indicator of this defoamer is the particle size of the silicone oil emulsion. In order to make its defoaming effect and stability good, its particle size is required to be less than 10 μm
2. Silicone oil type paint defoamer
This defoamer is mainly based on the good dispersion of silicone oil and the defoaming organic solvent. It quickly disperses in the foaming system and quickly penetrates into the foam to achieve a rapid defoaming effect. Because its defoaming substance is It is a non-polar molecule, so it has a faster defoaming speed than ordinary defoamers, so as to avoid the impact of foam on the coating, and its excellent chemical stability can prevent it from colliding with the foaming system. reaction, and at the same time, there will be no delamination, precipitation, etc., which can effectively improve the quality of the coating.
3. Polyether modified silicon coating defoamer
It is mainly developed from polyether and silicone through precise chemical processing, and has the advantages of both silicone and polyether. The lipophilic nature of silicone and the hydrophilic nature of polyether make it suitable for both oily and water-based systems. When used, for these two different foaming systems, it can also quickly eliminate the foam in the foaming liquid, and its anti-foaming substance can prevent the foaming liquid from foaming for a long time The problem is that it uses less and can effectively help customers save costs to a certain extent. Compared with the price of some imported defoamers, its cost performance is still very high. At the same time, it not only has strong defoaming and antifoaming capabilities It also has the advantages of high temperature resistance, acid and alkali resistance and chemical inertness, as well as self-emulsification and cloud point phenomenon
