Defoamer for Aqueous Systems, Solvent- and VOC-free
Borchers® AF 1171 is a polysiloxane, VOC-free anti-foaming agent and defoamer. This defoaming agent is ideal for preventing paint production and millbase foaming in aqueous decorative and general industrial systems. Borchers® AF 1171 works in solvent- and water-based coatings.
Benefits of Defoamers for Aqueous Systems
Antifoams and defoamers like Borchers® AF 1171 provide foam control during paint production and millbase phases in aqueous coating systems. Borchers® AF 1171 improves gloss, substrate wetting, and color strength in pigmented systems. It avoids microfoam formation during manufacturing.
Borchers® AF 1171 is a mixture of foam destroying silicones and hydrophobic components. It is very efficient in the grinding stage, increases density, and works well when preparing pigment concentrates.
Ideal applications include a wide range of decorative and general industrial aqueous coatings. Borchers® AF 1171 antifoaming agent is effective in spray paints used on metal and concrete tile roofs when combined with Borchi® Gel 0621 rheology modifier.
Appearance milky white liquid Non-volatile content Min. 98 % ISO 3251
(1g, 1h, 125 °C)
pH Neutral Density 1.01 – 1.05 g/ml ISO
2811-3 (25 °C)
Viscosity 210 – 290 mPa.s
ASTM D 1638 (25 °C)
Color NA Flash point 250 °C Refractive index NA Turbidity NA Solvent(s) NA
• Improves film gloss, substrate wetting, color strength in pigmented systems
• Avoids microfoam formation during manufacturing
• Easy to emulsify in water
• Should be used in grinding step, but can also be added in let-down or post-add
• Supports quick air release of entrapped air in the surface during application
• Coatings based on
- Water soluble alkyds
- Straight and vinyl acrylates
- Hydroxyl-bearing polyacrylates
The recommended dosage is 0.05 – 1.50 % Borchers® AF 1171 to the total weight of the formulation depending upon the
binder system and which property is being addressed. The exact dosage should be experimentally determined. In
pigmented systems, 2/3 of the defoamer portion should be added to the grind and 1/3 to the letdown.
Protect from the effects of weathering and store at temperatures between 5 and 30 °C. Once opened, containers should be
resealed immediately after each removal of the product. Separation may occur, mix well before use.
Please refer to our safety data sheet for information relating to product safety.
For chemical inventory status, please review section 15 of the current SDS.
Click here to access the SDS portal.
For additional regulatory information, please contact [email protected].