Silicone Defoamer / Antifoam for Printing Inks
CAS Number: 8050-81-5
Polydimethylsiloxane-based defoamer and antifoam compounds formulated for the rapid elimination of foam and micro-foam in water-based flexographic, gravure, and digital printing inks, preventing foam-induced print defects such as pinholes, craters, and density variations. Available as neat silicone oil, emulsion, or silica-filled compound to suit solvent, waterborne, and UV ink systems.
Technical Specifications
| appearance | White to off-white emulsion or clear silicone oil |
| active content (%) | 10–100 (grade dependent) |
| viscosity (mPa·s) | 100–5000 (25 °C) |
| pH (emulsion grades) | 5.0–8.0 |
| density (g/mL, 25 °C) | 0.95–1.05 |
Applications
- Defoamer in waterborne flexo and gravure inks
- Antifoam in digital inkjet ink formulations
- Foam control in UV-curable printing inks
- Antifoam in overprint aqueous varnishes
- Defoamer in water-based screen printing inks
Key Features
- Rapid and persistent defoaming at very low addition levels (0.01–0.3%)
- Available in waterborne emulsion for water-based ink compatibility
- Silica-filled grades for enhanced defoaming in high-foam systems
- Minimal impact on gloss, adhesion, and overprint varnish wettability
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