HDB-SC4000

Product Details

CasNo： 9003-04-7

MF： (C3H3NaO2)n

Appearance： liquid

Delivery Time： 15 days

Packing： 200kg/drum

Purity： 99%

1. Core Basic Information

1. Product Name: HDB-SC4000 Dispersant
2. Chemical Category: High-molecular polycarboxylate anionic dispersant, synthesized via free-radical copolymerization to form a comb-like structure. Its molecular chain contains numerous carboxylate groups and polyoxyethylene side chains, achieving dispersion through the dual mechanism of "electrostatic repulsion + steric hindrance".
3. Appearance and Properties: At room temperature, it is a pale yellow to yellow transparent viscous liquid, free from visible impurities, precipitation, or stratification. It has moderate fluidity, facilitating metered addition.
4. Core Functions: Significant viscosity reduction (suitable for high-solid-content systems), broad-spectrum dispersion stability, inhibition of particle agglomeration and particle size growth, compatible with pesticide active ingredients and pigment systems.

2. Key Technical Parameters (Typical Reference Range, Subject to Batch TDS)

3. Core Performance Advantages

1. Outstanding Viscosity Reduction and Grinding Efficiency: For pesticide SC systems with solid content ≥48%, it can reduce the viscosity of the grinding system by 30%-50%, shorten sand milling time by more than 20%, and quickly achieve a stable particle size state of D90 ≤5μm. For example, in a 50% thiophanate-methyl SC formulation, adding 4% can control the system viscosity within 450-550mPa·s.
2. Strong Versatility and Compatibility: Suitable for more than 90% of common pesticide formulations, including fungicides (thiophanate-methyl), insecticides (acetamiprid), herbicides, and other SC formulations. It is also compatible with organic pigments such as Pigment Red 5RK, enabling synergistic dispersion of active ingredients and pigments. When compounded with phosphate-based wetting agents, it can also improve the leaf surface permeability of the liquid.
3. Excellent Dispersion Stability: The molecular chain tightly adsorbs on the particle surface, working with suspending agents to build an "electrostatic-steric" dual barrier, inhibiting Ostwald ripening. After 14 days of thermal storage at 54℃, the suspension rate of 20% AI pesticide SC is ≥92%, and the D90 particle size fluctuation is ≤0.3μm.
4. Good Process Adaptability: Resistant to high shear (sand milling speed 1500-3000r/min), with molecular chains not easily broken; can be added in the pre-mixing or post-adjustment stage without modifying existing equipment parameters.

4. Application Scenarios

1. Agricultural Pesticide Field: Preparation of high-concentration pesticide suspensions (SC), such as 40% difenoconazole SC, 50% thiophanate-methyl SC, 20% acetamiprid SC, etc. The recommended addition amount is 3%-5%, solving the problems of "difficult dispersion of high-content and easy sedimentation".
2. Pigment and Color Paste Field: Aqueous dispersion systems of organic/inorganic pigments (e.g., Pigment Red 5RK color paste), synergistically reducing viscosity and controlling the particle size distribution CV value <15%, improving the color development and stability of the color paste.
3. Other Fields: Suitable for water-dispersible granules (WG), suspoemulsions (SE) and other formulations, especially prominent in high-content and multi-component compound formulations.

5. Usage and Storage Instructions

1. Recommended Dosage:
   • Pesticide SC systems: 3%-5% (based on total mass), can be increased to 6%-7% for high-solid-content (≥50% AI) or nano-scale powders;
   • Pigment color paste systems: 4%-6%, adjusted according to the oil absorption of the pigment.
2. Usage Method:
   • Pre-mixing stage: Premix with humectants and water, then add active ingredients/pigments before sand milling;
   • Post-adjustment stage: If the viscosity is too high after sand milling, add 0.5%-1% of HDB-SC4000 to quickly reduce viscosity.
3. Storage Conditions:
   • Store in a sealed, cool and dry place, with temperature between 5-35℃, avoiding direct sunlight and freezing; slight viscosity may occur in low-temperature environments, and performance is not affected after heating to 20-25℃ and stirring.
4. Shelf Life: 12 months in unopened state (from production date), recommended to use within 1 month after opening.

6. Precautions

1. It is recommended to conduct a 200g small-scale test before first use to determine the optimal dosage for the adapted formula, avoiding insufficient stability due to insufficient dosage or increased costs due to excessive dosage.
2. Wear nitrile gloves during operation to avoid direct skin contact; if it gets into the eyes, rinse immediately with plenty of water and seek medical attention.
3. Do not store with strongly acidic (pH < 4.0) or strong oxidizing substances to prevent molecular chain degradation.
4. Slight color difference may exist between batches, which does not affect product performance.