Product Type: Sulfonate-based wetting agent, specifically designed for Water Dispersible Granule (WDG), with the core chemical component being a modified alkyl sulfonate complex.
Core Features: Different from ordinary sulfonate wetting agents, it has both strong universality and high-efficiency wettability, which can quickly reduce the solid-liquid interfacial tension and is suitable for various WDG formula systems.
Appearance and Physical Properties: It is a light yellow to brown transparent liquid (or free-flowing powder, not clearly marked, inferred based on the commonality of sulfonate additives); the pH value (1% aqueous solution) is 6.0-8.0, and it is well compatible with most pesticide active ingredients and additives.
2. Key Performance Parameters
Recommended Dosage: The addition ratio in WDG formulations is 1% - 3%. For poorly wettable active ingredients (such as hydrophobic herbicides), it can be adjusted to 2% - 4%. The optimal ratio should be verified by small-scale tests.
Wetting Efficiency Indicators:
Contact Angle: On the surface of water-sensitive WDG particles, the time for the contact angle to drop from more than 90° to less than 30° is ≤15 seconds (the industry average is about 20 - 30 seconds).
Disintegration Assistance: When compounded with a dispersant, it can shorten the disintegration time of WDG particles by 10% - 20%.
Compatibility and Stability:
Compatibility: It is compatible with naphthalene sulfonate dispersants (such as HDB-382), non-ionic surfactants (such as fatty alcohol polyoxyethylene ether) and most pesticide active ingredients (such as pyrethroids, organophosphates) without problems such as delamination and precipitation.
Environmental Stability: In the temperature range of -5℃ - 50℃ and pH 5.0 - 9.0 acid-base environment, the wetting performance fluctuation is ≤5%; after 12 months of normal temperature storage, the active ingredient retention rate is ≥98%.
3. Application Scenarios
Core Application Fields:
Agricultural Pesticide WDG Preparation: Suitable for various pesticide WDG formulations, especially for WDG formulations of hydrophobic active ingredients (such as acetochlor, fenvalerate), solving the pain points of "poor wettability and slow disintegration".
Chemical Powder Wetting Treatment: Used for wetting hydrophobic powders (such as paraffin micropowder, polyethylene wax) in the coating and ink industries to improve the dispersibility of powders in aqueous systems.
Suitable Processes: Compatible with mainstream WDG production processes such as extrusion granulation and spray granulation, and can be directly added to the active ingredient-additive premix without adjusting existing process parameters.
4. Core Advantages
Wide Universality: No need to adjust separately for specific active ingredients or formulations, suitable for more than 90% of WDG product types, reducing customers' formula development costs.
Outstanding Wettability: Quickly reduce the solid-liquid interfacial tension, making WDG particles "wet in seconds" in water, solving the problem of "particle floating and uneven efficacy" during field application.
High Cost-Effectiveness: Excellent wetting effect can be achieved with low addition amount (1% - 3%). Compared with imported similar wetting agents, the comprehensive cost is reduced by 15% - 20%.
Safety and Environmental Friendliness: Acute oral toxicity LD50 > 2000mg/kg (low toxicity level), biodegradation rate (BOD5/CODcr) ≥0.4, complying with domestic and international environmental standards for pesticide additives.
5. Precautions for Use
When mixing the formula, it is recommended to premix HDB-1903 and the dispersant evenly before adding the active ingredient to avoid fluctuations in wetting performance caused by excessive local concentration.
It should be stored in a cool and ventilated place (temperature ≤35℃) in a sealed manner, avoiding direct sunlight; if there is slight delamination, it does not affect the performance after stirring evenly.
For strongly acidic/strongly alkaline active ingredients (such as glyphosate, lime sulfur), a compatibility small test (total formula amount within 200g) should be carried out before the first use to verify the wetting effect and stability.
6. Quality Standards
Execution Standard: Enterprise Standard Q/HD 015 - 2025 (subject to the official standard of the manufacturing enterprise).
Key Index Control: Active ingredient content ≥95%, moisture content ≤1.0%, pH value (1% aqueous solution) 6.0 - 8.0, total content of heavy metals (lead, cadmium) ≤10mg/kg.
