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

VOK VOK-931 Defoamer

VOK VOK-931 Defoamer is a high-efficiency silicone-based antifoam agent designed for demanding industrial applications including coatings, inks, and chemical processing. It delivers rapid foam suppression, excellent compatibility, and long-term stability without affecting product clarity or performance. Ideal for water- and solvent-based systems requiring reliable defoaming action under shear and elevated temperatures.
  • vok vok 931 defoamer_48475b57
  • vok vok 931 defoamer_48475b57

Features Of VOK VOK-931 Defoamer

  1. Highly effective silicone-based defoamer with rapid knock-down and lasting foam suppression.

  2. Excellent compatibility with water-based systems, including acrylic, vinyl acetate, and styrene-butadiene emulsions.

  3. Low dosage requirement—effective at 0.05–0.3% w/w in most formulations.

  4. Thermally stable up to 120°C, suitable for high-temperature polymerization and processing conditions.

  5. Non-staining and non-silicone-residue-forming, ensuring clarity and surface integrity in final products.

Typical Applications Of VOK VOK-931 Defoamer

  1. Latex paint and architectural coatings manufacturing.

  2. Adhesive and sealant formulation (e.g., PVA, SBR, and PU dispersions).

  3. Textile sizing and finishing baths.

  4. Water-based ink production for flexographic and gravure printing.

  5. Industrial cleaning and detergent concentrates.

Specifications Of VOK VOK-931 Defoamer

Chemical TypeSilicone-polyether copolymer dispersion
Product FormOpaque white liquid
AppearanceHomogeneous milky dispersion
pH (1% aqueous dilution)6.0–7.5
Specific Gravity (25°C)1.02–1.06 g/cm³
Viscosity (25°C, mPa·s)150–400 (Brookfield RV, spindle #3, 20 rpm)
Storage Stability≥12 months in unopened original container at 5–30°C
Primary ApplicationsWater-based emulsions, coatings, adhesives, textiles, inks


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