TERSPERSE 2700

Product Details

CasNo： 36290-04-7

MF： (C10H8O3S)n.(CH2O)n.xNa

Appearance： liquid

Delivery Time： 15 days

Packing： 200kg/drum

Purity： 99%

1. Basic Attributes

• Product Type: Alkylnaphthalene sulfonate formaldehyde condensate-based polymeric dispersant, with the core component being a branched alkylnaphthalene sulfonate sodium formaldehyde condensate. It achieves particle dispersion and stabilization through synergistic electrostatic repulsion and steric hindrance effects, suitable for high-solid-content (≥65%) aqueous suspension systems. It is particularly applicable in pesticide suspensions (SC), water-based coatings, ceramic slurries, and mineral processing slurries.
• Key Certifications: Complies with EU REACH Regulation, China’s HG/T 4575-2013 Standard for Dispersants Used in Pesticide Suspensions. It is free of nonylphenol (NP) and alkylphenol ethoxylates (APE), with a biodegradation rate of ≥80%. Some specifications meet the "low toxicity" and "low irritation" classifications in EU EC 1272/2008 CLP Regulation and can pass the US EPA pesticide adjuvant compliance certification.
• Applicable Systems: Compatible with neutral to weakly alkaline aqueous systems (pH 6.5-11.0), highly tolerant to high electrolytes (e.g., 18% potassium chloride solution, 10% ammonium sulfate solution). It can be used stably in environments with temperatures ranging from -8℃ to 52℃. It is not suitable for strongly acidic (pH < 5.5) or strongly oxidizing (e.g., containing high-concentration sodium hypochlorite) systems.

2. Core Physicochemical Properties

3. Functions and Typical Application Scenarios

• Core Functions:

  1. Efficient Dispersion and Long-Term Stability: Through the adsorption of sulfonate sodium groups on the particle surface to form a dense electrostatic double layer and the construction of a three-dimensional steric hindrance barrier by branched alkyl chains, particles (D50≤3μm) can maintain stable suspension for 130 days without sedimentation. In pesticide SC after thermal storage (54℃×14 days), the particle size growth is ≤4.5%, and the suspension rate remains ≥90%, far superior to traditional lignin dispersants (particle size growth ≥12%, suspension rate ≤75%).
  2. Viscosity Reduction and High Solid Content Adaptation: In aqueous systems, it can increase the solid content to over 72% while controlling the system viscosity below 1600 mPa·s (25℃, 20rpm). Taking 50% glufosinate-ammonium SC as an example, after adding this dispersant, the system viscosity decreases from 2200 mPa·s to 1200 mPa·s, reducing solvent usage by 15% and lowering packaging and transportation costs.
  3. Enhanced Salt and Shear Resistance: In 18% high-salt solutions, the dispersion performance retention rate is ≥88%. It can withstand high-speed stirring at 3500r/min and the shear force of nano mills (sand mills), with a secondary agglomeration rate of particles after grinding ≤5%, suitable for industrial continuous production processes and improving production efficiency.
  4. Synergistic Dispersion: When compounded with nonionic surfactants, it can produce a "synergistic dispersion effect", increasing dispersion efficiency by 15%-20%, reducing the dosage of a single dispersant, and improving the low-temperature stability of the formulation (no delamination after storage at -5℃ for 7 days).

• Typical Application Fields:

  • Agrochemical Industry: Used in formulations such as 50% pyraclostrobin SC, 45% glufosinate-ammonium SC, and 30% difenoconazole SC. The recommended dosage is 2.8%-5.5%. When replacing traditional naphthalene sulfonate formaldehyde condensates (e.g., NNO, MF), it can improve the thermal storage stability of the formulation by 25% and extend the efficacy duration by 7-10 days.
  • Water-Based Coatings: As a dispersant for pigments such as titanium dioxide (R902), heavy calcium carbonate (1250 mesh), and talc, with a recommended dosage of 0.9%-2.2%. It can reduce grinding time by more than 35%, improve coating hiding power (increased by 12% compared to without addition), avoid "floating and blooming" of the paint film, and make the coating scrub resistance ≥3000 cycles (GB/T 9266 standard).
  • Ceramic and Mineral Processing: Used in ceramic green body slurries (e.g., alumina ceramics) and mineral flotation slurries (e.g., kaolin), with a recommended dosage of 1.6%-3.2%. It can reduce the viscosity of ceramic slurries, improve slurry fluidity, and increase the sintered density of green bodies to above 2.6g/cm³. In kaolin flotation, it can increase concentrate recovery by 8%-10%.
  • Battery Materials Assistance: Used in the pretreatment slurry of lithium battery anode materials (natural graphite), with a recommended dosage of 1.2%-2.0%. It can improve the dispersion uniformity of graphite particles, reduce electrode sheet cracks, and enhance battery cycle performance (1000-cycle capacity retention rate ≥85%).

4. Usage Specifications and Precautions

• Recommended Dosage: 2.8%-5.5% in the agrochemical field, 0.9%-2.2% in the water-based coatings field, 1.6%-3.2% in the ceramic/mineral processing field, and 1.2%-2.0% in the battery materials field. It is recommended to determine the optimal ratio through small-scale tests (sedimentation volume ratio test, particle size distribution test, viscosity test). Excessive addition (exceeding the recommended upper limit by 20%) may lead to increased foam in the system, which can be adjusted by adding an organic silicon defoamer (e.g., BYK-024), with the defoamer dosage being 5%-8% of the dispersant dosage.
• Compatibility: Can be compounded with nonionic surfactants (e.g., AEO-9, NP-10) and anionic surfactants (e.g., sodium dodecylbenzene sulfonate). It is strictly prohibited to mix with high-concentration cationic surfactants (e.g., cetyltrimethylammonium bromide, dodecyldimethylbenzylammonium chloride), otherwise, ion association reaction will occur, resulting in precipitation and dispersion failure.
• Storage Requirements: Seal and store in a cool, ventilated place (5-38℃), avoiding direct sunlight and freezing (below -8℃ may cause the active ingredient to precipitate). The unopened shelf life is 24 months, and it should be used within 6 months after opening. The remaining product should be tightly capped to prevent moisture. If irreversible delamination occurs in the solution (not restored after heating), it should not be used.
• Safety: The acute oral toxicity LD50 (rat) >3500mg/kg, classified as low toxicity. Skin irritation test (rabbit) shows mild irritation (erythema subsides within 24h), and eye irritation test shows no irritation. It is recommended to wear acid and alkali-resistant gloves and safety glasses during operation. If it comes into contact with the skin accidentally, rinse with water, no special treatment is required. It is prohibited to store with food and feed.