A fast-acting, broad-spectrum biocide for treating raw materials, processing water, and contaminated products.
DOWICIL QK-20
$0.00
Market: Adhesives & Sealants, Coatings-Architectural, Coatings-Construction, Coatings-Industrial, ConstructionProduct Category: Biocides/Fungicides/Preservatives
Supplier: Dupont
DOWICILâ„¢ QK-20 Antimicrobial is a fast-acting, broad-spectrum biocide that is ideal for reducing microbiological contamination in raw materials or products such as aqueous paints and coatings, polymers, slurries, adhesives, latex and resin emulsions, sizing, caulk, process water and specialty industrial products including inks, polishes, waxes, detergents, and cleansers. DOWICIL QK-20Â quickly and economically cleans up potential sources of contamination without requiring a shut down or delay in production.
In finished products, this biocide can be used effectively in combination with long-term preservatives to reduce the bio-burden on the long-term preservatives and minimize the likelihood of organism tolerance. This can lower the changes for field failure, product recall, product rework, and downtime.
This product also serves as a fast-acting, low cost preservative for aqueous formulations such as adhesives where short term protection ranging from several days to several weeks is needed.
The compound 2,2-dibromo-3-nitrilopropionamide (DBNPA) is the active ingredient in this biocide.
DOWICIL QK-20 Applications
- In-process “house-keeping” applications
- Incoming raw materials
- Process water/make-up recycle water
- Combination or supplemental short-term preservative for finished products
- Aqueous paints and coatings
- Caulk
- Waxes and polishes
- Detergents and cleaners
- Resin emulsions
- Latex, Sizing, Adhesives
- Slurries, Inks, Surfactants
Performance Data
Typical Organism Reduction in an Anionic Surfactant by DOWICIL QK-20
Greater than a 3 log reduction in microorganisms occurred within 48 hours following the addition of 200 ppm DOWICIL QK-20 Antimicrobial. This same approximated reduction in microorganism counts occurred within 24 hours following the addition of 300, 400, and 500 ppm DOWICIL QK-20 Antimicrobial. The counts remained at 102 CFU/mL, which is the test detection limit, for the length of the study (1 week).
Typical Organism Reduction in Latex by DOWICIL QK-20 Antimicrobial
Greater than a 3 log reduction in microorganisms was observed within 24 hours following the addition of 300, 400, and 500 ppm DOWICIL QK-20 Antimicrobial. This same reduction in organisms occurred more quickly, within 5 hours, following the addition of 500 ppm DOWICIL QK-20 Antimicrobial. The counts remained at 102 CFU/mL, which is the test detection limit, for the length of the study (1 week).
Physical Properties
| Active Ingredient | 2,2-dibromo-3-nitrilopropionamide |
| CAS Number of DBNPA | 1022-01-2 |
| Precent Active Ingredient | 20% |
| Inert Ingredients | Polyethylene glycol/water |
| Colour | Clear to amber |
| Appearance | Liquid |
| Odour | Low, mildly antiseptic |
| Freezing Point | About -50°C (per ASTM D97) |
| Pour Point | About -45°C (per ASTM D97) |
| Free Flowing | About -30°C (per ASTM D97) |
| Freeze-Thaw Stability | Passed 7 cycles at -15°C to +20°C |
| Boiling point | > 120°C for solution, but active ingredient decomposes |
| Specific Gravity | 1.24 – 1.27 g/mL at 23°C |
| Miscibility | Miscible with water in all proportions |
| Vapor Pressure (DBNPA) | 2 x 10-5 mmHg at 23°C |
| Flash Point | Non detected (COC) |
| Partition Coefficient | P=0.1 for mineral oil/water |
| Storage Stability | Analysis shows that 95% of the original concentration of the active ingredient is maintained when stored in appropriate containers after 9 months. |
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