The entire process of coating grinding, mixing, and spraying is prone to generating fine foam, which, after drying, forms pinholes and pockmarks, significantly reducing the protective and decorative properties. Siloxane-based defoaming silicone oil has become the core material for solving foam defects. Traditional mineral oil defoamers have poor compatibility and are prone to causing paint film shrinkage and fogging; modified silicone oil defoamers have both defoaming and long-term anti-foaming capabilities. During the grinding stage, they can quickly break the bubbles in the slurry, and during the spraying process, they can inhibit air entrainment, eliminating pinhole flaws at the source.
For thick-coat artistic coatings and high-solid-content industrial anti-corrosion coatings, the high-activity concentrated defoaming silicone oil has outstanding advantages. With a very low addition amount, it can effectively control foam for a long time without affecting the dispersion of pigments. Water-based interior and exterior wall latex paints and floor paints special emulsified silicone oil are suitable for high alkaline emulsion systems. They do not separate during storage or break down, and their defoaming performance does not deteriorate over a long period.
Test data show that the exterior wall coatings using IOTA defoaming silicone oil do not have any impact on salt spray and wash resistance performance, and the paint film is dense and intact. With the popularization of automated high-speed production lines in coating factories, the problem of production capacity loss caused by foam has intensified. Environmental-friendly low-ring silicone oil defoamers gradually replace traditional inefficient defoaming raw materials comprehensively. In 2026, the purchase volume of coating defoaming additives increased by 19% compared to the previous year.