PolyDADMAC PDMDAAC Cationic Polymer Solution

PolyDADMAC PDMDAAC Cationic Polymer Solution is a linear, water-soluble quaternary ammonium polymer produced by the polymerization of DADMAC monomers. The finished product is a homogeneous, viscous aqueous solution that requires no further dissolution or preparation. It functions through electrostatic adsorption to neutralize charges, thereby achieving flocculation, decolorization, and purification. It maintains stable performance across a pH range of 4.0--10.0 and offers advantages such as chlorine resistance, resistance to gelation, and low irritation, making it a highly regarded liquid cationic agent for drinking water treatment and various industrial processes.

Definition of Liquid PolyDADMAC Products

1. Chemical Name: Polydiallyldimethylammonium chloride solution (abbreviated as PolyDADMAC or PDMDAAC); CAS No. 26062-79-3.

2. Material Properties: A linear, high-molecular-weight quaternary ammonium strong cationic polyelectrolyte. The finished product is a colorless to pale yellow, viscous, homogeneous liquid that is completely miscible with water, forming a true solution free of insoluble particles.

3. Mechanism of Action: Electrostatic attraction generated by quaternary ammonium cationic groups on the molecular chain adsorbs negatively charged colloids, suspended impurities, and organic components within the water or system. This neutralizes charges and simultaneously achieves adsorption-coagulation, flocculation-sedimentation, and decolorization-purification effects.

4. Basic Safety Properties: Safe and non-toxic, non-flammable, and minimally irritating to the skin. It is not classified as a hazardous chemical and is suitable for use in drinking water treatment applications.

What are the physical performance advantages of the liquid form?

1. Broad pH Tolerance and Stable Performance Under Fluctuating Conditions

The reagent maintains stable physicochemical properties within a pH range of 4.0--10.0; it does not undergo hydrolysis or degradation, nor does it form gels during long-term storage in aqueous solution, making it suitable for production systems with significant pH fluctuations.

2. Chlorine Resistance, Suitable for Chlorine-Containing Process Environments

It does not rapidly deactivate in the presence of residual chlorine, allowing for use in combined disinfection-flocculation processes and minimizing performance loss after dosing.

3. Defined Physicochemical Parameters Facilitate Process Calibration

The PolyDADMAC PDMDAAC Cationic Polymer Solution has a specific gravity of approximately 1.04 g/cm³, a freezing point of -2.8°C, and a thermal decomposition range of 280--300°C. With clearly defined physical specifications, facilities can directly select appropriate storage tanks, piping, and dosing equipment based on these parameters.

4. Liquid Form Avoids Drawbacks of Powder Handling

Unlike powdered PolyDADMAC, the liquid product poses no dust inhalation risk and eliminates issues with localized clumping or poor solubility; the composition is uniform, ensuring high batch-to-batch consistency.

Applications in Water Treatment

1. Drinking Water Purification

This product holds NSF certification for drinking water applications and is listed in Australian drinking water treatment guidelines. It can serve as a primary flocculant—replacing some metal salt-based agents—to remove colloidal matter, color, and organic impurities, thereby reducing effluent turbidity.

2. Industrial Sewage and Wastewater Treatment

It effectively neutralizes charges, decolorizes, and flocculates various types of industrial wastewater. By rapidly compressing the colloidal electrical double layer, it promotes the aggregation and settling of fine suspended impurities, thereby reducing the load on downstream biochemical and filtration units.

3. Solid-Liquid Separation of Mining Slurries

Used in mineral slurry dewatering processes, it destabilizes colloids within the sludge system, accelerates solid-liquid separation, and enhances dewatering efficiency.

4. Process Compatibility

Compatible with mainstream water treatment units such as dissolved air flotation (DAF) systems and sedimentation tanks. It produces dense flocs with rapid settling speeds; dosage is controllable, helping to manage overall chemical consumption costs.

PolyDADMAC Solution Usage Instructions

1. Dilution Ratio: While the stock solution can be dosed directly, on-site application usually recommends dilution with clean water at a ratio of 1:10. The diluted solution should be used shortly after preparation; long-term storage of the working solution is not recommended.

2. Dosing Point Selection: Dose upstream of the mixing stage to ensure rapid, thorough mixing and effective charge neutralization; follow this with a gentle flocculation zone to promote floc growth.

3. Dosage Control: Actual dosage depends on raw water turbidity, colloid content, and pH levels. Conducting on-site beaker tests to determine the optimal concentration is recommended rather than applying fixed values directly.

4. Equipment Requirements: The stock solution is compatible with automatic metering dosing pumps. Use PE (polyethylene) storage tanks and ensure piping avoids direct contact with strong oxidizing agents. Maintain ambient temperatures above the product's freezing point; insulate storage tanks in cold conditions to prevent solidification.

5. Compatibility Note: Avoid direct mixing with anionic agents at the same dosing point; contact between the two causes rapid flocculent precipitation, rendering the product ineffective.

Quality Control

1. Feedstock Control: DADMAC monomers used for polymerization come entirely from in-house production lines. Monomer purity is tested upon entry to minimize impurity carry-over into the final polymer product.

2. Process Control: Temperature and system viscosity are monitored in real-time during polymerization to control key metrics—molecular weight and charge density—ensuring batch-to-batch variations remain within acceptable limits.

3. Finished Product Testing: Parameters include appearance, specific gravity, viscosity, solids content, charge density, and pH. A test report is issued for every batch of PolyDADMAC PDMDAAC Cationic Polymer Solution; non-compliant products are not released for shipment.

4. Compliance Verification: For drinking-water-grade products, safety-related parameters are verified in parallel against NSF standards and international drinking water guidelines to ensure compliance with export customers' requirements.

5. Sample Retention & Traceability: Samples are retained from every finished product batch for the duration of the product's shelf life; should questions regarding application suitability arise, these samples can be retrieved for re-testing.

Supply Solutions for Buyers

1. Flexible Packaging Options: Available in 50kg, 125kg, and 200kg PE drums, as well as 1000kg IBC totes; these packaging options cater to various procurement scales, ranging from small-scale pilot tests to small-to-medium factories and large-scale continuous production facilities.

2. Storage, Transport, and Shelf Life: Store in a sealed container within a cool, dry warehouse, away from strong oxidizing agents; shipped as non-hazardous goods; product shelf life is 24 months.

3. Pre-sales Technical Support: Samples are available for prospective customers to conduct laboratory pilot tests and confirm the suitable product grade and dosage range.

4. Bulk Delivery Capabilities: Leveraging an integrated DADMAC-PolyDADMAC supply chain, we fulfill standard stock orders and schedule production based on specific order volumes, facilitating bulk shipments worldwide.

5. Comprehensive Technical Services: We provide product selection guidance, assisting customers in choosing the appropriate viscosity and molecular weight specifications based on their specific process conditions, thereby minimizing trial-and-error costs.