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Polydiallyldimethylammonium chloride (shortened polyDADMAC or polyDDA), also commonly polyquaternium-6, is a
homopolymer of diallyldimethylammonium chloride (DADMAC). The molecular weight of polyDADMAC is typically in the range of
hundreds of thousands of grams per mole, and even up to a million for some products. PolyDADMAC is usually delivered as a
liquid concentrate having a solids level in the range of 10 to 50%. It is a high charge density cationic polymer. The charge density
makes it well suited for flocculation. Actually, pDADMAC or DMDAAC, is used as a coagulant - a charge neutralization process that
precedes flocculation.
Properties
- Physical Form: Typically available as a colorless to pale yellow viscous liquid.
- Charge Density: Exhibits a high cationic charge density, making it highly effective in various ionic interactions.
- Solubility: Completely soluble in water, forming a clear, viscous solution.
- Stability: Demonstrates good chemical stability and can withstand a wide pH range, making it suitable for diverse applications.
Applications
1.Water Decolorization Applications
- Coagulation and Flocculation: PolyDADMAC is extensively used in the treatment of both drinking water and wastewater. It
acts as a coagulant to neutralize the charges of suspended particles, allowing them to aggregate into larger flocs that can be
easily removed.
- Sludge Dewatering: The polymer aids in the dewatering of sludge, improving the efficiency of the separation process and
reducing the volume of sludge for disposal.
2.Paper and Pulp Industry:
- Retention and Drainage Aid: In the paper manufacturing process, polyDADMAC improves the retention of fines and fillers,
enhances drainage, and increases the efficiency of the paper machine.
- Pitch Control: It helps in controlling pitch and stickies in the papermaking process, which can cause problems with paper
quality and machine runnability.
3.Cosmetics and Personal Care Products:
- Conditioning Agent: Known as polyquaternium-6 in the cosmetics industry, it is used as a conditioning agent in hair care products, providing improved hair manageability and feel.
4.Oil and Gas Industry:
- Drilling Fluids: PolyDADMAC is used in the formulation of drilling fluids to enhance the stability and performance of the drilling process.
- Enhanced Oil Recovery: It can be used in enhanced oil recovery processes to improve the efficiency of oil extraction from
reservoirs.
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