China High Quality Polydadmac for Wastewater Treatment Coagulant (40%) Pdadmac Polymer Paper-Making Auxiliary

Polydiallyldimethylammonium chloride (polyDADMAC) is a water-soluble polymer widely used in various industrial applications. Here is a detailed description of polyDADMAC:

Chemical Structure and Properties

1. Chemical Formula: (C8h16ncl)N
2. Molecular Weight: Variable, depending on the degree of polymerization
3. Appearance: PolyDADMAC is typically available as a clear to pale yellow liquid or as a solid.
4. Solubility: Highly soluble in water
5. Density: Approximately 1.04 g/cm³ (for the liquid form)
6. pH: Neutral to slightly acidic in solution

Synthesis

PolyDADMAC is synthesized by the polymerization of diallyldimethylammonium chloride (DADMAC). The process involves:

1. Monomer Preparation:

   • DADMAC is prepared through the reaction of allyl chloride with dimethylamine, followed by quaternization with hydrochloric acid.

2. Polymerization:

   • The DADMAC monomer undergoes free radical polymerization to form polyDADMAC.
   • The polymerization process can be initiated using thermal, redox, or photochemical initiators.
   • The reaction conditions, such as temperature, pH, and initiator concentration, are carefully controlled to achieve the desired molecular weight and polymer properties.

Applications

PolyDADMAC is used in various industries due to its cationic charge and excellent water solubility. Some primary applications include:

1. Water Treatment:

   • Coagulant and Flocculant: PolyDADMAC is widely used in water and wastewater treatment as a coagulant and flocculant. It helps in the removal of suspended solids, organic matter, and other impurities by promoting aggregation and settling.
   • Sludge Dewatering: It enhances the dewatering of sludge in wastewater treatment plants, improving the efficiency of the process.

2. Paper Industry:

   • Retention and Drainage Aid: PolyDADMAC is used in the paper industry to improve the retention of fibers, fillers, and other additives, leading to better paper quality and production efficiency.
   • Fixative Agent: It helps in fixing dyes and pigments to the paper fibers, ensuring uniform coloration and reducing dye wastage.

3. Textile Industry:

   • Antistatic Agent: PolyDADMAC reduces static electricity in textile fibers, improving the handling and processing of fabrics.
   • Dye Fixative: It enhances the fastness properties of dyes on fabrics, making the colors more durable.

4. Cosmetics and Personal Care:

   • Conditioning Agent: PolyDADMAC is used in hair conditioners and skincare products for its conditioning and antistatic properties. It helps in making hair and skin feel smoother and softer.

5. Oil and Gas Industry:

   • Demulsifier: PolyDADMAC is used in crude oil processing to break water-in-oil emulsions, facilitating the separation of oil and water.

Safety and Handling

• Toxicity: PolyDADMAC is considered to have low toxicity, but it should still be handled with care to avoid skin and eye contact.
• Storage: Store in a cool, dry place, away from direct sunlight and incompatible materials.
• Handling Precautions: Use appropriate personal protective equipment (PPE), such as gloves and safety goggles, when handling polyDADMAC.

Environmental Impact

PolyDADMAC is generally considered to be environmentally safe when used and disposed of properly. It degrades relatively quickly in the environment and does not bioaccumulate. However, it is essential to manage its disposal properly to avoid any potential environmental harm.

PolyDADMAC is a versatile and widely used polymer with numerous applications in water treatment, paper manufacturing, textiles, cosmetics, and the oil and gas industry. Its cationic nature and excellent water solubility make it an effective coagulant, flocculant, conditioning agent, and antistatic agent. Proper handling and storage are crucial to ensure safety and environmental protection.