Poly (Diallyldimethylammonium Chloride)

Product Details

CasNo： 26062-79-3

MF： (C8H16ClN)n

Appearance： liquid

Delivery Time： 15 days

Packing： 200kg/drum

Purity： 99%

1. Basic Information

• Chinese Name: 聚二烯丙基二甲基氯化铵 (Poly (Diallyldimethylammonium Chloride))
• English Name: Poly (Diallyldimethylammonium Chloride)
• Abbreviation: PDADMAC; Polyquaternium-6 (INCI name for cosmetic use)
• CAS Number: 26062-79-3
• Molecular Formula: (C8​H16​NCl)n​ (repeating unit structure; n = degree of polymerization, corresponding to molecular weight ranges)
• Molecular Weight: Conventional industrial-grade products have a molecular weight range of 10,000–1,000,000 Da, customizable by application:
  • Low molecular weight: 10,000–50,000 Da
  • Medium molecular weight: 50,000–500,000 Da
  • High molecular weight: 500,000–1,000,000 Da
• Common Synonyms: Poly(dimethyldiallylammonium chloride); PDADMAC; Polyquaternium-6

2. Appearance and Properties

• Industrial-grade products are mostly colorless to pale yellow transparent liquids (solid content: 20%–50%); some high-purity solid products appear as white powders or granules.
• Liquid products have no obvious odor; viscosity increases with molecular weight:
  • Low-molecular-weight products (20% solid content, 25°C): ~50–200 mPa·s
  • High-molecular-weight products (20% solid content, 25°C): ~1,000–5,000 mPa·s
• Highly soluble in water, forming a homogeneous transparent solution after dissolution; insoluble in organic solvents such as ethanol, acetone, and benzene. It has good acid-base resistance and remains stable in the pH range of 2–11.

3. Core Physical and Chemical Properties

4. Key Performance Characteristics

1. High Cationic Charge Density & Strong Adsorption: Dense quaternary ammonium cation groups on the molecular chain rapidly adsorb negatively charged particles (e.g., colloidal particles, pigments, fibers, bacterial cell walls) in water or on substrate surfaces. This forms stable aggregates, enabling efficient flocculation, solid-liquid separation, or surface modification.
2. Excellent Water Solubility & Easy Use: Regardless of low, medium, or high molecular weight, PDADMAC dissolves quickly in water without heating or co-solvents. The solution is free of precipitation or stratification and can be directly diluted for dosing, reducing operational complexity.
3. Versatility for Multiple Scenarios: It combines flocculation, dispersion, emulsification, antistatic, and bactericidal functions:
   • Used as a flocculant in water treatment.
   • Used as a retention and drainage aid in papermaking.
   • Used as an antistatic agent in textiles.
   • Used as a conditioner in cosmetics.
     This "one-material-multiple-uses" trait reduces the need for multiple additives.
4. Good Environmental Compatibility: Biodegradable (compliant with EU EC 1272/2008, biodegradation rate >60%), its degradation products are small-molecule amines and inorganic salts. It contains no heavy metal residues, causing minimal pollution to water and soil, aligning with "green industry" trends.
5. Strong Stability & Anti-Interference: Stable over a wide pH range (2–11) and in certain salt concentrations, it is not easily affected by calcium/magnesium ions or other impurities in water. This makes it suitable for complex water quality (e.g., industrial wastewater, high-salinity groundwater) or multi-component systems (e.g., cosmetic formulations).

5. Application Fields

1. Water Treatment (Core Scenario)

• Municipal Sewage Treatment: Used as a primary/secondary flocculant to quickly adsorb suspended particles, COD (chemical oxygen demand), and color in sewage. It improves solid-liquid separation efficiency in sedimentation tanks and reduces effluent turbidity.
• Industrial Wastewater Treatment: Targets printing and dyeing wastewater (adsorbs dye molecules), electroplating wastewater (removes heavy metal ion complexes), and papermaking wastewater (flocculates fibers and fillers) to achieve efficient pollutant removal and meet discharge standards.
• Drinking Water Purification: Replaces traditional aluminum salts (e.g., polyaluminum chloride) as a coagulant aid. It shortens floc sedimentation time, reduces residual aluminum in drinking water, and enhances water safety.

2. Papermaking & Textile Industries

• Papermaking: Acts as a retention and drainage aid, adsorbing fine fibers and fillers (e.g., calcium carbonate) in pulp to reduce fiber loss in white water. It improves paper strength and uniformity and also functions as a paper strengthener to enhance tear resistance.
• Textiles: Serves as an antistatic agent and softener. It adsorbs onto fiber surfaces to form a cationic film, reducing surface resistance, minimizing static generation, and increasing fabric softness for improved wear comfort.

3. Personal Care

• Cosmetics & Toiletries: Used as a conditioner (INCI: Polyquaternium-6) in shampoos and conditioners. It adsorbs onto negatively charged hair surfaces, forming a protective film to reduce frizz and split ends, and enhance smoothness and shine. In facial cleansers and lotions, it acts as a stabilizer to improve system homogeneity.

4. Other Industrial Fields

• Oilfield Exploitation: Used as a drilling fluid additive to adjust viscosity and fluid loss, stabilize wellbores, and prevent collapse.
• Food Industry: Food-grade PDADMAC (compliant with FDA 21 CFR §173.320) acts as a clarifier for fruit juices and beer. It removes suspended impurities and improves product transparency.
• Paints & Inks: Functions as a dispersant and stabilizer to prevent pigment particle agglomeration, enhancing storage stability and coating uniformity of paints/inks.

6. Safety Information

1. Industrial-Grade Product Safety:
   • Low toxicity (LD₅₀ > 5,000 mg/kg, oral acute toxicity test), but liquid products may cause mild irritation to skin and eyes. Wear gloves and goggles during operation to avoid direct contact.
   • In case of skin contact: Rinse immediately with water. In case of eye contact: Rinse with plenty of water for over 15 minutes and seek medical attention promptly.
2. Food-Grade/Cosmetic-Grade Product Safety:
   • Food-grade PDADMAC (FDA-compliant) and cosmetic-grade Polyquaternium-6 (EU CosIng-compliant) have passed safety assessments. When used within specified limits (≤0.05% in food, ≤2% in cosmetics), they are harmless to humans and non-sensitizing.
3. Environmental Safety:
   • High biodegradation rate and no ecotoxicity (LC₅₀ > 1,000 mg/L for fish, EC₅₀ > 500 mg/L for algae). It does not accumulate in the environment and complies with global environmental regulations.
4. Usage Recommendations:
   • Dilute industrial-grade products before dosing (typically to 0.1%–1% concentration) to avoid agglomeration from high local concentrations.
   • When compounding with other agents (e.g., anionic flocculants), add them sequentially with stirring intervals to prevent premature reactions and precipitation.
   • For food/cosmetic applications, use grade-specific products; do not substitute with industrial-grade PDADMAC.

7. Packaging and Storage

1. Packaging Forms

• Liquid Products:
  • Small sizes (1L, 5L, 20L): HDPE (high-density polyethylene) plastic bottles with sealed caps, suitable for laboratory R&D or small-batch trials.
  • Industrial sizes (200L, 1,000L): 200L HDPE plastic drums (with liners), 1,000L IBC totes (with valves) — moisture-proof, leak-proof, and easy for transportation and mechanical dosing.
• Solid Products (Powder/Granules):
  • 25kg kraft paper bags (lined with PE film), 50kg cardboard drums — hermetically sealed to prevent moisture absorption and caking.

2. Storage Conditions

• Store in a cool, dry area (temperature: 5–30°C, relative humidity: <75%); avoid direct sunlight and high temperatures (>60°C) to prevent product degradation or viscosity changes.
• Gently stir liquid products periodically during storage to avoid concentration unevenness from long-term standing.
• Seal solid products tightly to prevent moisture absorption and caking (caked products can be crushed and used normally after dissolution).
• Shelf Life:
  • Unopened liquid products: 12–24 months (varies by solid content; higher solid content products have shorter shelf lives).
  • Unopened solid products: 24–36 months.
  • Use opened products within 1 month and reseal immediately after each use.