FENNOPOL DADMAC 20, 40, and 50 are industrial-grade poly(diallyldimethylammonium chloride) (PolyDADMAC) products from Kemira, differentiated mainly by active solid content—20%, 40%, and 50% respectively—alongside tailored molecular weights and charge densities. Their cationic nature, water solubility, and strong adsorption capacity make them versatile across water treatment, papermaking, textiles, and oilfield industries, with each grade optimized for specific efficiency and cost - performance needs.
All three grades act as coagulants, flocculant aids, and sludge dewatering agents, but their dosages and scenarios differ. FENNOPOL DADMAC 20, with its lower solid content, is ideal for small - scale drinking water plants or low - turbidity raw water treatment. It neutralizes negative charges on colloids and suspended particles, forming small, dense flocs that boost clarity while cutting down the use of aluminum sulfate or ferric chloride, thus lowering residual metal ions. It also suits pre - treatment of lightly polluted industrial wastewater (e.g., electronics or food processing) to reduce organic load before advanced treatment.
FENNOPOL DADMAC 40 is the most widely used for municipal and industrial wastewater. It excels in treating printing - dyeing, papermaking, and leather wastewater, which are high in organics and turbidity. As a primary coagulant, it can partially replace inorganic coagulants, and when paired with anionic polyacrylamide (PAM), it enhances floc formation and speeds up sedimentation. In sludge dewatering, it adsorbs onto sludge particles, raising cake density and reducing water content by 10–15%, which improves the efficiency of belt filter presses and centrifuges, lowering disposal costs.
FENNOPOL DADMAC 50, with the highest solid content and charge density, is for heavy - duty scenarios. It handles high - turbidity industrial wastewater (e.g., coal washing or mining effluent) and is a premium sludge dewatering agent for biological or chemical sludge with high organic content. It also works in membrane pre - treatment to remove colloids and organics, extending membrane lifespan and reducing cleaning frequency. All grades perform stably in a wide pH range (0.5–14), ensuring reliable results in diverse water conditions.
In papermaking, these grades serve as retention - drainage aids, pitch control agents, and strength modifiers. FENNOPOL DADMAC 20 is often used in small paper mills producing low - grade paper like newsprint. It adsorbs onto cellulose fibers and calcium carbonate fillers, improving fines retention and drainage speed, which cuts energy use in paper machines and reduces raw material loss.
FENNOPOL DADMAC 40 is a staple in medium - to - large mills making packaging or printing paper. It boosts filler retention rate by 15–20%, enhances inter - fiber bonding to improve dry strength, and controls pitch deposits from mechanical pulp, reducing machine downtime. It also aids AKD sizing, making paper more water - resistant.
FENNOPOL DADMAC 50 is designed for high - end specialty paper (e.g., coated or conductive paper). Its high charge density firmly fixes pigments and coating binders, enhancing surface smoothness and printability. It also acts as an antistatic agent, preventing static buildup during high - speed printing and packaging.
In textiles, all grades are formaldehyde - free dye - fixing agents for anionic dyes (reactive, acid). FENNOPOL DADMAC 20 is for small - batch dyeing of delicate fabrics (silk, wool), forming a protective film to improve washing and rubbing fastness without affecting hand feel. DADMAC 40 is for large - scale cotton or polyester dyeing, while DADMAC 50 is for high - color - fastness requirements (e.g., outdoor textiles), as its higher charge density strengthens dye - fiber bonding. They also function as antistatic agents in fiber processing to reduce yarn breakage.
In the oilfield industry, DADMAC 40 and 50 are clay stabilizers. They adsorb onto clay surfaces to prevent swelling and migration in formation pores, maintaining reservoir permeability and boosting oil recovery. DADMAC 50, with its higher charge density, is preferred for high - salinity or high - temperature reservoirs, while DADMAC 40 is used in conventional water - injection wells. DADMAC 20 is sometimes used in low - cost, low - pressure well maintenance.
In mining, DADMAC 40 aids in mineral ore flotation and tailings dewatering, separating valuable minerals from gangue. In daily chemicals, diluted DADMAC 20 is added to shampoos as a conditioning agent to reduce frizz and improve combability.
