Product Type: Compound WDG wetting agent (special sulfonate + defoamer), with the core component being a complex of modified special alkyl sulfonate and high-efficiency defoamer.
Core Features: Different from conventional wetting agents, it combines high-efficiency wettability and ultra-low foam property. While rapidly reducing the solid-liquid interfacial tension, it strongly inhibits foam formation and persistence, making it suitable for WDG formula systems extremely sensitive to foam.
Appearance and Physical Properties: It appears as a light brown to reddish-brown transparent liquid (or free-flowing powder, not clearly marked, inferred based on the common characteristics of compound additives); the pH value (1% aqueous solution) ranges from 6.0 to 8.0, showing excellent compatibility with most pesticide active ingredients and dispersants.
2. Key Performance Parameters
Recommended Dosage: The addition ratio in WDG formulations is 1.2% - 3.0%. For ultra-hydrophobic active ingredients (such as oxyfluorfen and fomesafen), it can be adjusted to 2.5% - 4.0%. The optimal ratio should be verified through small-scale tests.
Wettability and Defoaming 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 ≤18 seconds, and the foam height is ≤3mm (the average foam height of similar products in the industry is about 6 - 10mm).
Disintegration Assistance: When compounded with a dispersant, it can shorten the disintegration time of WDG particles by 20% - 30%, and no visible foam is generated throughout the disintegration process.
Compatibility and Stability:
Compatibility: It is compatible with naphthalene sulfonate dispersants (e.g., HDB-382), non-ionic surfactants (e.g., alkyl glycosides), and most pesticide active ingredients (e.g., diniconazole, chlorpyrifos), without problems such as stratification, precipitation, or abnormal foam rebound.
Environmental Stability: Within the temperature range of -5℃ - 55℃ and pH range of 5.0 - 9.5, the fluctuation of wetting and defoaming performance is ≤3%; after 12 months of storage at room temperature, the retention rate of active ingredients is ≥98%.
3. Application Scenarios
Core Application Fields:
Agricultural Pesticide WDG Preparation: Focus on pesticide formulations with zero tolerance for foam, such as WDG for unmanned aerial vehicle (UAV) spraying (to avoid foam affecting the atomization effect of UAV application) and WDG for precision seeding soil-mixing pesticides (to prevent drug-soil separation caused by foam).
Chemical Ultra-Low Foam Wetting Treatment: Used in industries extremely sensitive to foam, such as electronic pastes and high-end inks, for wetting and dispersing nano-scale powders (e.g., nano-silica, carbon nanotubes) to ensure consistent product performance.
Suitable Processes: Compatible with mainstream WDG production processes such as extrusion granulation and spray granulation. It can be directly added to the active ingredient-additive premix without adjusting existing process parameters.
4. Core Advantages
Dual Excellence in Ultra-Low Foam and Wettability: While ensuring ultra-rapid wetting (contact angle ≤18 seconds), the foam height is controlled within 3mm, solving the industry problem that "wettability and low foam property cannot be achieved simultaneously" for traditional wetting agents.
Balance of Versatility and Targeted Performance: Suitable for more than 80% of conventional WDG products, and provides targeted solutions for the low-foam wetting needs of ultra-hydrophobic and ultra-fine powder active ingredients. No additional defoamer is required, simplifying formula complexity.
Leading Cost-Effectiveness: A low addition amount (1.2% - 3.0%) can achieve the dual ultimate effects of "wetting + defoaming". Compared with the combined scheme of "high-end wetting agent + special defoamer", the comprehensive cost is reduced by 15% - 22%.
Safety, Environmental Protection and Compliance: The acute oral toxicity LD50 is >2000mg/kg (low-toxicity level), and the biodegradation rate (BOD5/CODcr) is ≥0.45, complying with EU REACH regulations and China’s GB/T 23377-2020 environmental standards for pesticide additives.
5. Precautions for Use
When mixing the formula, it is recommended to premix HDB-1904X with the dispersant for 3-5 minutes until uniform, then add the active ingredient to avoid fluctuations in defoaming performance caused by local concentration differences.
It should be stored in a sealed manner in a cool and dry place (temperature ≤30℃), avoiding direct sunlight; if slight stratification occurs, it does not affect the performance after stirring evenly.
For strong reducing active ingredients (such as phosphite series), a compatibility small-scale test (total formula amount within 200g) should be conducted before the first use to verify the stability of wetting and defoaming effects.
6. Quality Standards
Implementation Standard: Enterprise Standard Q/HD 017 - 2025 (subject to the official standard of the manufacturing enterprise).
Key Index Control: Active ingredient content ≥96%, moisture content ≤0.8%, pH value (1% aqueous solution) 6.0 - 8.0, foam height (0.1% aqueous solution, Ross-Miles foam meter method) ≤8mm, total content of heavy metals (lead, cadmium, mercury) ≤10mg/kg.
