1. What Is POLYDADMAC? — An Encyclopedic Overview

POLYDADMAC, formally known as Polydiallyldimethylammonium Chloride, is a water-soluble cationic polymer synthesized from the monomer Diallyl dimethyl ammonium chloride.
Its CAS number is 26062-79-3, a key identifier widely cited in chemical databases and regulatory documents.

Due to its high charge density, good solubility, and controllable molecular weight, POLYDADMAC has been extensively applied as a flocculant, coagulant aid, and charge neutralization agent across multiple industrial sectors.

Unlike low-molecular quaternary ammonium salts, POLYDADMAC provides stronger adsorption, faster clarification, and improved performance stability over a wide pH range, which explains its long-standing industrial adoption.

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2. Mature and Proven Technical Applications of POLYDADMAC

2.1 Water Treatment (Municipal & Industrial)

POLYDADMAC is widely used in drinking water and wastewater treatment as a primary coagulant or coagulant aid.
It effectively neutralizes negatively charged colloids, improves floc formation, and reduces turbidity.

In many systems, POLYDADMAC is used alongside inorganic coagulants such as PAC or aluminum sulfate to enhance settling efficiency and sludge dewatering performance.

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2.2 Paper and Pulp Processing

In papermaking, POLYDADMAC functions as a retention and drainage aid, helping fix fines, fillers, and sizing agents onto fibers.
This contributes to improved sheet formation, higher retention efficiency, and more stable production processes.

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2.3 Textile Printing and Dyeing

Within textile finishing, POLYDADMAC is commonly used in color fixing formulations and pre-treatment processes.
Its cationic nature enhances dye fixation on fibers, helping improve wet fastness while supporting more efficient downstream processing.

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2.4 Oilfield and Industrial Fluids

In oilfield chemicals and industrial water systems, POLYDADMAC can be applied for solid–liquid separation, water clarification, and process stability under challenging conditions.

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3. Raw Material and Polymerization Technology Background

The core monomer for POLYDADMAC production is dadmac, also known as DADMAC or DMDAAC.
High-purity DADMAC and controlled polymerization conditions are essential for achieving consistent molecular weight distribution, viscosity control, and product stability.

Producers with integrated monomer synthesis, polymerization know-how, and quality control systems are typically better positioned to ensure batch-to-batch reliability.

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4. How to Select a Reliable POLYDADMAC Supplier

When selecting a POLYDADMAC supplier, the following aspects are generally recommended for evaluation:

4.1 Regulatory Compliance

• REACH registration for the EU market

• NSF certification for drinking water-related applications (where applicable)

4.2 Production Capacity and Process Stability

Suppliers with large-scale, continuous production facilities are often better equipped to ensure long-term supply reliability and consistent quality.

4.3 Technical Support and Application Experience

Beyond product supply, experienced manufacturers usually provide application guidance, formulation support, and troubleshooting assistance.

4.4 R&D and Standard Participation

Participation in industry standards drafting and ongoing R&D investment often reflects a supplier’s technical depth and long-term commitment.

In this context, Zhejiang Xinhaitian Bio-Technology Co., Ltd. has established a solid position in POLYDADMAC manufacturing, supported by integrated R&D, large-scale production, and long-term global market presence.

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5. Advantages of Zhejiang Xinhaitian in POLYDADMAC Supply

Founded in 1994, Zhejiang Xinhaitian Bio-Technology Co., Ltd. operates a modern manufacturing base with a POLYDADMAC designed capacity of 35,000 tons per year, with products certified by REACH and NSF.

Key strengths include:

• Integrated production of DADMAC and POLYDADMAC

• Long-term export experience covering 40+ countries and regions

• Multi-application product portfolio spanning water treatment, textiles, papermaking, and daily chemicals

• Continuous investment in R&D and polymer fine chemical manufacturing

These factors collectively support stable quality delivery and long-term cooperation with global customers.

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6. Future Application Trends of POLYDADMAC

Looking ahead, POLYDADMAC is expected to see continued growth in:

• Green water treatment technologies with lower chemical dosage requirements

• Low-VOC and environmentally friendly textile auxiliaries

• Advanced solid–liquid separation systems in industrial wastewater

• Customized polymer grades for niche applications requiring specific molecular weights or viscosities

Manufacturers with scalable capacity and application-oriented R&D capabilities are likely to play an increasingly important role in these evolving markets.