Poly-DADMAC (Polydiallyldimethylammonium Chloride)
Poly-DADMAC (polydiallyldimethylammonium chloride) is a high-charge-density cationic polyelectrolyte widely used in papermaking as a fixative for anionic substances, a coagulant for dissolved and colloidal material, and a drainage and retention aid. Its strong permanent cationic charge neutralizes anionic colloidal substances (ACS) in the white water loop, improving sizing efficiency and reducing chemical demand.
Technical Specifications
| pH | 3.0–6.0 |
| appearance | Colorless to pale yellow viscous liquid |
| active content (%) | 20±2 |
| molecular weight (Da) | 100,000–500,000 |
| charge density (meq/g) | 6–7 |
| viscosity (mPa·s, 25°C) | 200–2000 |
Applications
- Fixative for anionic colloidal substances in papermaking white water
- Charge neutralization to improve retention aid efficiency
- Coagulant for dissolved organic substances in furnish
- Wastewater treatment for suspended solids removal
- Fixation of optical brightening agents onto fibers
Key Features
- Very high permanent cationic charge for effective ACS neutralization
- Improves sizing efficiency of ASA, AKD, and rosin size
- Enhances fixation and retention of dyes and OBA on fibers
- Compatible with all wet-end additives and pH ranges
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