TERSPERSE 4894

Product Details

CasNo： 26677-99-6

MF： (C4H4O4)n.(C3H4O2)n

Appearance： liquid

Delivery Time： 15 days

Packing： 200kg/drum

Purity： 99%

1. Basic Attributes

• Product Type: Polycarboxylate-based block copolymer dispersant, with the core component being an acrylic acid-maleic anhydride block copolymer derivative. It achieves dispersion and stabilization of nanoscale particles (D50≤1μm) through synergistic steric hindrance and electrostatic repulsion effects, suitable for high-solid-content (≥70%) aqueous suspension systems. It is particularly applicable in pesticide nano-suspensions (nano-SC), high-end water-based coatings, and lithium battery electrode 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 ≥85%. 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 6.0-10.0), highly tolerant to high electrolytes (e.g., 20% potassium sulfate solution, 15% ammonium dihydrogen phosphate solution). It can be used stably in environments with temperatures ranging from -10℃ to 55℃. It is not suitable for strongly acidic (pH < 5) or strongly reducing (e.g., containing high-concentration sodium sulfite) systems.

2. Core Physicochemical Properties

3. Functions and Typical Application Scenarios

• Core Functions:

  1. Nanoscale Dispersion and Long-Term Stability: Through the adsorption of carboxylic acid groups on the particle surface and the construction of a three-dimensional steric hindrance layer by polyether segments, nanoscale particles (D50≤1μm) can maintain stable suspension for 150 days without sedimentation. In pesticide nano-SC after thermal storage (54℃×14 days), the particle size growth is ≤3%, and the suspension rate remains ≥92%, far superior to traditional dispersants (particle size growth ≥8%, suspension rate ≤75%).
  2. High Solid Content and Low Viscosity Adaptation: In aqueous systems, it can increase the solid content to over 75% while controlling the system viscosity below 1000 mPa·s (25℃, 20rpm). Taking 5% abamectin nano-SC as an example, after adding this dispersant, the system viscosity decreases from 1800 mPa·s to 800 mPa·s, reducing solvent usage by 18% and lowering packaging and transportation costs.
  3. Enhanced Salt and Shear Resistance: In 20% high-salt solutions, the dispersion performance retention rate is ≥90%. It can withstand ultra-high-speed stirring at 5000r/min and the shear force of nanomills (sand mills), with a secondary agglomeration rate of particles after grinding ≤4%, suitable for industrial continuous production processes of nanomaterials 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 -8℃ for 7 days).

• Typical Application Fields:

  • Agrochemical Industry: Used in formulations such as 5% abamectin nano-SC and 10% lambda-cyhalothrin nano-SC. The recommended dosage is 3%-6%. It can increase pesticide bioavailability by more than 30% and extend the efficacy duration by 7-10 days.
  • High-End Water-Based Coatings: As a dispersant for nanomaterials such as nano-titanium dioxide (P25) and nano-alumina, with a recommended dosage of 1%-3%. It can improve coating weather resistance by 50%, achieve a hardness of above 5H, and is suitable for high-end fields such as aerospace and automobiles.
  • Lithium Battery Materials: Used in lithium battery cathode material (e.g., lithium iron phosphate, ternary material) slurries, with a recommended dosage of 2%-5%. It can optimize electrode porosity and ion conductivity, enhancing battery cycle life (1000-cycle capacity retention rate ≥85%).
  • Nanomaterial Processing: Used in the aqueous dispersion of nanomaterials such as nano-calcium carbonate and nano-zinc oxide, with a recommended dosage of 0.8%-2.5%. It can achieve a dispersed particle size D50≤100nm, meeting the application requirements of high-end functional materials (e.g., nano-coatings, nano-catalysts).

4. Usage Specifications and Precautions

• Recommended Dosage: 3%-6% in the agrochemical field, 1%-3% in the high-end coatings field, 2%-5% in the lithium battery slurry field, and 0.8%-2.5% in the nanomaterial processing 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-028), with the defoamer dosage being 5%-8% of the dispersant dosage.
• Compatibility: Can be compounded with nonionic surfactants (e.g., AEO-7, NP-9) 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 (5-30℃), avoiding direct sunlight and freezing (below -10℃ 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) >5000mg/kg, classified as practically non-toxic. Skin irritation test (rabbit) shows no irritation, and eye irritation test shows no irritation. It is recommended to wear acid and alkali-resistant gloves 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.