Organic silicone Defoamers

Organic silicone defoamers are highly efficient defoamers and foam suppressants with polydimethylsiloxane (PDMS) as the main component. They are widely used in chemical, food, water treatment, textile, and pharmaceutical industries. Their core characteristics are low surface tension, strong chemical inertness, and high-temperature resistance, enabling them to quickly disrupt foam stability.

Composition of Organosilicone Defoamers

Main Components

Component | Function

Polydimethylsiloxane (PDMS) | Main defoaming component, reduces liquid surface tension, and promotes foam breakdown.

Silica (SiO₂) | Enhances the dispersibility of PDMS and improves defoaming efficiency (hydrophobic SiO₂ is more effective).

Emulsifier | Ensures uniform dispersion of organosilicone in water (e.g., Span, Tween series).

Carrier (Water/Oil): Adjusts viscosity to suit different systems (water-based/oil-based defoamers).

Common Types:

Water-soluble silicone defoamers: Used in aqueous systems (e.g., wastewater treatment, fermentation industries).

Oil-soluble silicone defoamers: Used in oil-based systems (e.g., lubricants, paints).

Self-emulsifying silicone defoamers: No additional emulsification required, suitable for high-shear systems.

Food-grade silicone defoamers (compliant with FDA/GB 2760): Used in food processing and beverage production.