Product Type: Special terminal sulfonate-based WDG (Water Dispersible Granule) wetting agent, with the core component being modified end-group substituted alkyl sulfonate. Different from traditional mid-chain sulfonate structures, its molecular design is more suitable for foam-free application scenarios.
Core Features: It has both absolute foam-free property and broad-spectrum universality. While rapidly reducing the solid-liquid interfacial tension to achieve efficient wetting, no foam is generated throughout the process. Moreover, there is no need to adjust the formula for specific active ingredients, and it is suitable for multiple WDG systems.
Appearance and Physical Properties: It appears as a colorless to light yellow transparent liquid (or white free-flowing powder, not clearly marked, inferred based on the common characteristics of terminal sulfonate additives); the pH value (1% aqueous solution) is 6.2-8.2, and it has excellent compatibility with most pesticide active ingredients (such as herbicides, insecticides) and dispersants (such as naphthalene sulfonates), without stratification or precipitation.
2. Key Performance Parameters
Recommended Dosage: The addition ratio in WDG formulations is 1.0%-3.0%. For ultra-hydrophobic active ingredients (such as fipronil, pyraclostrobin), it can be adjusted to 2.5%-4.0%. The optimal ratio needs to be verified by small-scale tests (it is recommended to start testing from 2.0%).
Wetting and Foam-Free Efficiency Indicators:
Contact Angle: On the surface of water-sensitive WDG particles, the time for the contact angle to decrease from over 90° to below 30° is ≤15 seconds, which is more than 25% faster than similar foam-free wetting agents in the industry (average 20-25 seconds).
Foam Height: Tested with a Ross-Miles foam meter (0.1% aqueous solution, 25℃), the foam height is always 0mm (no visible foam), and there is no foam rebound after standing for 30 minutes.
Disintegration Assistance: When compounded with a dispersant, it can shorten the disintegration time of WDG particles by 20%-30%, and the suspension after disintegration has good uniformity (suspension rate ≥98%).
Compatibility and Stability:
Compatibility: It is compatible with non-ionic surfactants (such as fatty alcohol polyoxyethylene ether), inorganic salt fillers (such as ammonium sulfate, kaolin), and most pesticide active ingredients without compatibility conflicts.
Environmental Stability: Within the temperature range of -8℃-60℃ and pH range of 5.0-10.0, the fluctuation of wetting performance is ≤3%; after 18 months of sealed storage at room temperature, the active ingredient retention rate is ≥97%, far exceeding the industry standard of 12 months.
3. Application Scenarios
Core Application Fields:
Agricultural Pesticide WDG Preparation: It is mainly suitable for scenarios with "zero tolerance" for foam, such as WDG for UAV spraying (to avoid foam affecting the atomization effect of UAVs and causing liquid drift) and WDG for refined application in greenhouses (to prevent foam from clogging nozzles and ensure uniform application); it is also suitable for conventional field crop WDG, simplifying the formula development process.
Chemical Foam-Free Wetting Treatment: It is used for powder wetting in electronic pastes (such as silver paste, copper paste) and high-end coatings (such as water-based industrial paints) to avoid surface defects (such as pinholes, shrinkage cavities) caused by foam; it can also be used for ceramic powder dispersion to improve the density uniformity of green bodies.
Suitable Processes: It is compatible with mainstream WDG production processes such as extrusion granulation, spray granulation, and fluidized bed granulation. It can be directly added to the active ingredient-additive premix without adjusting existing equipment parameters (such as stirring speed, granulation temperature), reducing production transformation costs.
4. Core Advantages
Dual Excellence in Foam-Free and Wetting: It breaks through the industry pain point that "foam-free means sacrificing wetting efficiency". While achieving "zero foam", its wetting speed is more than 25% faster than similar products, solving the foam interference problem in application and production.
Wide Universality Coverage: It is suitable for more than 90% of WDG formula types, including pesticide active ingredients with different action mechanisms and different filler systems. There is no need to develop exclusive wetting schemes for a single product, reducing customers' formula research and development costs and time.
Outstanding Cost-Effectiveness: Efficient effects can be achieved with a low addition amount (1.0%-3.0%). Compared with the combination scheme of "ordinary wetting agent + special defoamer", the comprehensive cost is reduced by 18%-25%; and the number of formula components is reduced, simplifying the production process.
Safety, Environmental Protection and Compliance: The acute oral toxicity LD50 > 2000mg/kg (low-toxicity level), and the biodegradation rate (BOD5/CODcr) ≥0.48. It complies with EU REACH regulations, US EPA standards, and China's GB/T 23377-2020 "General Environmental Safety Requirements for Pesticide Additives", and can meet the market access requirements of major global markets.
5. Precautions for Use
When mixing the formula, it is recommended to premix HDB-1908 with the dispersant for 2-3 minutes until uniform, and then add the active ingredient and filler to avoid excessive local concentration affecting the foam-free performance.
It should be stored in a sealed manner in a cool and dry place (temperature ≤35℃), avoiding direct sunlight and high-temperature exposure; if it is in liquid form, it may become slightly viscous in a low-temperature environment. It can be used normally after heating to 20℃ and stirring evenly without affecting performance.
For strong oxidizing active ingredients (such as potassium permanganate) or strong alkaline active ingredients (such as Bordeaux mixture), a small-scale 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 019-2025 (subject to the official standard issued by the manufacturer).
Key Index Control: Active ingredient content ≥96%, moisture content ≤0.8% (≤0.5% for liquid form), pH value (1% aqueous solution) 6.2-8.2, foam height (0.1% aqueous solution) 0mm, total content of heavy metals (lead, cadmium, mercury, arsenic) ≤5mg/kg, free formaldehyde content ≤0.1%.
