Name: Micro-Emulsion Defoamer MED-20
Brand: Coatingsink
SKU: micro-emulsion-defoamer-med20
Availability: InStock

Question 1

Why choose a micro-emulsion defoamer over a conventional silicone emulsion in high-gloss waterborne coatings?

Accepted Answer

Micro-emulsion particle sizes below 0.5 μm minimize light scattering, preserving gloss and film clarity. Conventional macro-emulsion defoamers risk visible micro-foam craters and haze at effective loading rates, making MED-20 the preferred choice where 85°+ gloss must be maintained.

Question 2

What is the recommended addition method and dosage for MED-20?

Accepted Answer

Add MED-20 to the aqueous phase during let-down at 0.05–0.2% on total formulation weight. In low-shear mixing systems, pre-dilute 1:5 in deionized water before addition to improve distribution. A split addition — half at grind, half at let-down — is effective for high-pigment-load formulations.

Question 3

Is MED-20 compatible with anionic and non-ionic surfactant packages?

Accepted Answer

Yes. MED-20 is compatible with both anionic and non-ionic surfactant systems commonly used in waterborne architectural and wood coatings. Avoid use in cationic systems or formulations with pH above 10, which can destabilize the emulsion.

pH	6.0–8.0
Particle Size	< 0.5 μm
Active Content	20%
Density (25°C)	1.00 g/ml
Viscosity (25°C)	200–500 mPa·s

Micro-Emulsion Defoamer MED-20

Specifications

FAQ

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