After introducing silicone defoamer and polyether defoamer one after another, today we will talk about mineral oil defoamer. It is also a widely used defoamer, such as architectural coatings, printing inks, adhesives and other industries. Let's find out together.
Mineral oil defoamer, its main components are carrier oil, hydrophobic particles, emulsifiers and preservatives and some other synergistic chemical additives. Among them, the carrier oil acts as a low surface tension compound, which determines its defoaming properties and long-lasting properties of anti-foaming. Mineral oil is insoluble in water on the liquid film of the foam, which leads to the destruction of the integrity of the liquid film, the recovery and fluidity of the liquid film, and the rupture of the foam, thus achieving the effect of defoaming .
Mineral oil
After understanding the properties of its ingredients, let's understand its advantages and disadvantages. Only by fully understanding it, we will not be in a hurry when choosing.
Mineral oil defoamer easily rises to the surface of the liquid when it is in use. In the coating system, the mineral oil contained in the defoamer is easy to float to the surface when the paint film dries, causing the surface of the paint film to become black and affecting the gloss of the paint film, so it is generally not suitable for high-gloss paints, but like those for gloss The degree of requirement is not very high, such as in matte paint, the defoamer is very suitable.
However, mineral oil defoamers also contain waxes and/or hydrophobic silica to improve performance. These products may also contain surfactants, which improve the compatibility of mineral oil defoamers in coatings without causing shrinkage. The phenomenon of holes, pinholes and even hammer marks accelerates emulsification and diffusion, and thus increases the speed of defoaming.
Mineral oil defoamer
Based on the above statements, the use of mineral oil defoamer has good compatibility with coatings, large dosage latitude, and is not easy to shrink, but it will reduce the gloss in water-based paints and coatings, and is suitable for use in products with less stringent color requirements. Perform defoaming.
After the above description, I believe that everyone has a certain understanding of mineral oil defoamer. It has its own advantages and disadvantages. Everyone should decide how to use it according to their actual situation.
If you have any questions about mineral oil defoamers or have defoamer needs, please contact 86 13428601010 and our technicians will answer you.
