Silicone Defoamer for Cooling Water (PDMS)
CAS Number: 9006-65-9
Polydimethylsiloxane (PDMS)-based silicone defoamer emulsion formulated for cooling tower and industrial water treatment applications. Provides fast knockdown and persistent foam suppression at very low dosages. The silicone active spreads rapidly across foam bubbles, reducing surface tension and causing rapid film rupture. Compatible with most cooling water treatment programs.
Technical Specifications
| pH | 6.5–8.5 |
| dosage | 1–10 mg/L (system dependent) |
| density | 0.98–1.02 g/cm³ |
| appearance | White milky emulsion |
| emulsifier type | Non-ionic emulsifier |
| active PDMS content | 10–30% |
Applications
- Cooling tower basin and splash foam control
- Industrial wastewater treatment aeration tank defoaming
- Paper mill and pulp processing water defoaming
- Chemical process water and scrubber water foam control
- Municipal wastewater activated sludge tank defoaming
Key Features
- Ultra-low dosage effective — 1–5 mg/L for most cooling applications
- Fast knockdown with long-lasting foam suppression
- Thermally stable up to 150°C for hot process water
- Compatible with anionic, cationic, and non-ionic water treatment chemicals
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