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

Kemira DF-A-646 Defoamer

Kemira DF-A-646 Defoamer is a high-performance silicone-free, water-based defoaming agent from Kemira’s DF-A series. Designed for demanding industrial applications including papermaking, coatings, and wastewater treatment, it delivers rapid foam suppression and long-lasting antifoam action under high shear and elevated temperatures. Its low-foam formulation ensures compatibility with anionic and nonionic systems while maintaining excellent dispersion stability.
  • kemira df a 646 defoamer_3ef6fa35
  • kemira df a 646 defoamer_3ef6fa35

Features Of Kemira DF-A-646 Defoamer

  1. Highly effective silicone-based defoamer for rapid foam collapse in demanding aqueous systems.

  2. Excellent long-term foam suppression with low dosage requirements.

  3. Good compatibility and stability in alkaline and neutral pH environments.

  4. Low odor and non-staining, supporting high-quality end-product appearance.

  5. Easily dispersible in water without pre-dilution or high-shear mixing.

Typical Applications Of Kemira DF-A-646 Defoamer

  1. Industrial cleaning formulations including CIP (Clean-in-Place) solutions.

  2. Textile processing auxiliaries such as dyeing, scouring, and rinsing baths.

  3. Paper coating and sizing applications where foam interferes with runnability.

  4. Water-based adhesives and emulsion polymerization processes.

  5. Concrete admixture systems requiring controlled air entrainment and foam control.

Specifications Of Kemira DF-A-646 Defoamer

Chemical TypeSilicone-polyether copolymer dispersion
Product FormOpaque white liquid
AppearanceHomogeneous milky emulsion
pH (1% aqueous solution)6.0–8.0
Specific Gravity (20°C)0.98–1.02 g/cm³
Viscosity (25°C, Brookfield LVT, Spindle #3, 6 rpm)500–1500 mPa·s
Primary ApplicationsIndustrial cleaning, textile processing, papermaking, coatings, construction chemicals
Key FeaturesRapid knockdown, persistent suppression, broad compatibility, low-foaming diluent stability


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