Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

TEGO Foamex 815N Defoamer

TEGO Foamex 815N is a German-origin defoamer, formulated as a polyether-silicone/fumed silica emulsion. Engineered with advanced thermo-mechanical properties to secure a competitive edge, it appears as a milky homogeneous liquid with a viscosity of 200-550 mPa·s. It demonstrates universal compatibility in solvent-borne, solvent-free, and radiation-curing systems, achieving ≥99.5% microfoam elimination at a dosage of 0.05%-0.2%. Certified by REACH, ISO 9001, and GB 30981-2020, it enhances transparency (haze ≤0.25%) and leveling (orange peel Ra≤0.06 μm) in premium varnish systems and high-speed flow coating (≥70 m/min).


Features Of TEGO Foamex 815N Defoamer

  1. Universal Compatibility: Maintains stability in 25-100% solid epoxy/acrylic/PU systems, adapting to a wide range of formulation solid contents and resin types, ensuring versatility across applications.

  2. Zero Silicone Risk: Passes FTIR/TOF-SIMS residue tests with no migration detected, eliminating concerns of silicone-related defects (e.g., craters, fisheyes) that could compromise surface quality.

  3. Instant Defoaming: Features 0.18 μm hybrid particles that eliminate bubbles in 0.8 seconds (per ASTM D892-XVIII standards), delivering rapid and efficient foam control for high-precision processes.

Typical Applications Of TEGO Foamex 815N Defoamer

  1. Piano Lacquers: Achieves a DOI (Distinctness of Image) ≥99 in ≥90% solid polyester-amide varnishes, ensuring a flawless, mirror-like finish for premium musical instrument coatings.

  2. Automotive Clearcoats: Maintains color stability (ΔE≤0.3) after 3,000 hours of QUV testing at flow coating speeds ≥100 m/min, preserving long-term finish quality in automotive clear coatings.

  3. Optical Adhesives: Ensures ≥98.8% transmittance in UV acrylics (with a refractive index of 1.45-1.50), preserving optical clarity for precision bonding applications.

Specifications Of TEGO Foamex 815N Defoamer

Type
Polyether-silicone/fumed silica emulsion
Appearance
Milky homogeneous liquid
Active Content
Polyether-silicone + fumed silica (20%)
Dynamic Viscosity
200-550 mPa·s
Compatible Systems
Solvent/solvent-free/radiation-curing
Density
1.02-1.10 g/cm³
Surface Tension
21.5 dyn/cm
Shear Stability
≥98% activity retention after ≥10^4 s⁻¹ shear
Addition Stage
Grinding or letdown phase
Shelf Life
36 months (sealed, 5-40°C)
Packaging
25kg/galvanized drum or 200kg/IBC tote


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