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Advantages of Silicone Defoamers
Release Date:
2021-01-22
(1) Wide range of applications: Due to the unique chemical structure of methyl silicone oil, it is immiscible with water and with substances containing optically active groups, as well as with nitrogen-containing compounds and hydrocarbon-based organic compounds. Because methyl silicone oil is insoluble in a wide variety of substances, it boasts an extensive application scope, being suitable for demulsification in aqueous systems and also for use in oil-based systems.
Silicone defoamer Advantages
(1) Wide range of applications: Due to the unique chemical structure of methyl silicone oil, it is immiscible with water and with substances containing optically active groups, as well as with nitrogen‑containing compounds and hydrocarbon‑based organic compounds. Because methyl silicone oil is insoluble in a wide variety of substances, it boasts an extensive application scope, being suitable for demulsification in aqueous systems and also for use in oil‑based systems.
(2) Low interfacial tension: Methyl silicone oil typically exhibits a surface tension of 20–21 dynes/cm, which is lower than that of water (76 dynes/cm) and most conventional defoaming agents, resulting in excellent emulsion-breaking efficiency.
(3) Excellent heat resistance: Taking commonly used dimethyl silicone oil as an example, it can withstand 150°C over long periods and temperatures exceeding 300°C for short durations, with its Si–O bonds remaining intact. This ensures that silicones can be used across a wide temperature range.
(4) Excellent chemical stability: Due to the stability of the Si–O bond, methyl silicone oil exhibits very high chemical stability and rarely undergoes exothermic reactions with other substances. Consequently, provided it is properly formulated, silicone‑based defoamers can be used in systems containing acids, bases, or salts.
(5) Physiological plasticity: Methyl silicone oil has been shown to be non‑toxic and free of adverse effects in both humans and animals, with a median lethal dose exceeding 34 g/kg. Consequently, organosilicone defoamers—when used in conjunction with suitable non‑toxic thickeners and other compatible ingredients—can be safely employed in industries such as food, healthcare, pharmaceuticals, and personal care products.
(6) Excellent defoaming performance: Silicone‑based defoamers not only effectively eliminate existing foam but also significantly inhibit foam formation, preventing further foaming. They are required in very small quantities—adding just one part per million (1 ppm) of the weight of the foaming substance is sufficient to achieve defoaming. Typical application levels range from 1 to 100 ppm. In addition to being cost‑effective, they do not contaminate the materials being treated.
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