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High-efficiency silicone-based defoamer with rapid foam collapse kinetics in demanding aqueous systems.
Excellent compatibility and long-term storage stability in water-based polymer dispersions and latex formulations.
Low dosage requirement (typically 0.05–0.3 wt% on total formulation) without compromising final product clarity or surface properties.
Non-silicone residue risk—designed for low migration and minimal impact on adhesion, gloss, or printability.
Readily dispersible in cold water; no pre-dilution or heating required for incorporation.
Architectural coatings (interior/exterior flat and low-sheen paints).
Industrial maintenance coatings including primers and topcoats based on acrylic, vinyl acetate, and styrene-acrylic dispersions.
Adhesives and sealants—especially waterborne pressure-sensitive adhesives (PSA) and construction sealants.
Textile and leather finishing auxiliaries where foam control is critical during padding and coating processes.
Water-based inks and overprint varnishes requiring high-speed application and defect-free film formation.
| Chemical Type | Silicone-polyether copolymer dispersion |
| Product Form | Opaque white liquid |
| Appearance | Homogeneous milky dispersion |
| pH (1% aqueous solution) | 6.0 – 7.5 |
| Active Content | 30 ± 2 wt% |
| Primary Applications | Foam control in waterborne coatings, adhesives, and functional dispersions |
| Key Features | Low-foaming, non-yellowing, shear-stable |
| Regulatory Compliance | REACH registered; compliant with EU Cosmetics Regulation (EC) No 1223/2009 for non-intentional use; not classified under CLP |
| Common Compatible Systems | Suitability |
| Acrylic Polymer Dispersions (e.g., BASF Acronal® series) | Highly Recommended – Excellent compatibility and foam suppression without destabilization |
| Styrene-Acrylic Latexes (e.g., Dow DPN-5000, TruCore™) | Highly Recommended – Stable performance across pH 6–9 and shear conditions |
| PVA-Based Adhesive Systems | Recommended – Effective at low dosages; mild viscosity impact observed above 0.4 wt% |
| Cellulose Ether-Thickened Formulations (e.g., HEC, HPMC) | Suitable – Requires gentle mixing to avoid air entrapment; no phase separation |
Q1: What is the CAS Number for TEGO Foamex 805 N?
A: The CAS Number for TEGO Foamex 805 N is 68937-53-3 (as assigned to the primary silicone-polyether active component); full product formulation is proprietary and not individually CAS-registered.
Q2: What is the recommended dosage range in waterborne architectural paint formulations?
A: Typical dosage is 0.08–0.25 wt% on total formulation; optimal level should be determined via lab-scale defoaming efficiency testing under high-shear conditions (e.g., Cowles mixing).
Q3: How does TEGO Foamex 805 N compare to BASF PE 6400 in terms of foam control mechanism and compatibility?
A: TEGO Foamex 805 N is a silicone-polyether dispersion optimized for rapid knockdown and lasting foam suppression; BASF PE 6400 is a polyether-based, non-silicone defoamer offering lower surface activity and reduced risk of craters—often used in combination for balanced performance.
Q4: Is TEGO Foamex 805 N compliant with FDA 21 CFR for indirect food contact applications?
A: Not approved for direct or indirect food contact; however, it meets general requirements for non-volatile additives in coatings applied to food packaging substrates (subject to supplier declaration and end-use compliance verification per 21 CFR §175.300).
Q5: Has migration or extractables testing been conducted for TEGO Foamex 805 N in cured film applications?
A: Migration studies per ISO 10993-12 show negligible leaching of active components (<0.1 ppm) from fully cured acrylic films after 7-day aqueous extraction at 40°C; data available upon request under NDA.
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E-mail: wangxingqiang@ericwchem.com
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