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WACKER AK 20000 SILICONE FLUID is a medium viscosity linear non-reactive polydimethylsiloxane in WACKER® AK series, designed for polyurethane release, industrial lubrication and defoaming. With high bond energy Si-O structure, it has excellent temperature resistance, low volatility and strong hydrophobicity, with good fluidity and processability, outperforming mineral oils.
Medium Viscosity & Easy Processing - Moderate viscosity, good fluidity, easy to add and coat, suitable for various processes
Excellent Chemical Stability - Non-reactive, resistant to acid, alkali and oxidation, good compatibility with most substrates
Wide Temperature Resistance Range - Stable at -55℃ to 300℃, resistant to radiation and high-temperature aging
Low Volatility & Shear Resistance - Extremely low volatility, good shear stability, less loss during long-term use
Outstanding Release Effect - Suitable for release of polyurethane and other materials, easy to peel off, no impact on substrate performance
Polyurethane Release - Mold release for polyurethane products, improving demolding efficiency and ensuring smooth surface
Industrial Lubrication - Lubrication for general equipment and precision components, reducing friction loss and extending service life
Defoaming Application - Defoaming in anhydrous/non-polar systems, quickly inhibiting foam and improving product quality
Dielectric Application - Insulation for medium and low voltage electrical equipment, ensuring stable insulation at high and low temperatures
| Auto Ignition Temperature | About 450℃ (Typical Value) |
| Density (25℃) | About 0.97 g/cm³ (Typical Value) |
| Flash Point (Closed Cup) | >320℃ (Typical Value) |
| Kinematic Viscosity (25℃) | About 20,000 mm²/s (Typical Value) |
| Dynamic Viscosity (25℃) | About 20,000 mPa·s (Typical Value) |
| Setting Point | About -55℃ (Typical Value) |
| Surface Tension (25℃) | About 0.021 N/m (Typical Value) |
| Refractive Index (25℃) | 1.403 (Typical Value) |
Q1: What is the primary function of WACKER AK 20000 Silicone Oil in industrial formulations?
A: WACKER AK 20000 Silicone Oil functions primarily as a surface-active additive to improve substrate wetting, reduce surface tension, and suppress foam formation—especially in water-based systems such as coatings, adhesives, and cleaning formulations.
Q2: Is WACKER AK 20000 Silicone Oil compatible with common polymer emulsions and aqueous dispersions?
A: Yes, it demonstrates good compatibility with a broad range of acrylic, styrene-acrylic, vinyl acetate, and polyurethane dispersions, and is typically added during the final stage of formulation to preserve its effectiveness and avoid destabilization.
Q3: How should WACKER AK 20000 Silicone Oil be incorporated into a formulation?
A: It is generally added under mild agitation at room temperature or slightly elevated temperatures. Pre-dilution in water or co-solvent may be beneficial for uniform dispersion, particularly in low-shear systems.
Q4: Does WACKER AK 20000 Silicone Oil affect the gloss or film appearance of finished coatings?
A: At recommended use levels, it typically does not negatively impact gloss or clarity; however, overdosing may lead to surface defects such as craters or haze, so dosage should be optimized per specific formulation and application method.
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