Product Type: Compound WDG wetting agent (sulfonate + defoamer), with the core component being a complex of modified alkyl sulfonate and special defoamer.
Core Features: Different from ordinary wetting agents, it combines high-efficiency wettability and low foam property. While quickly reducing the solid-liquid interfacial tension, it inhibits foam formation and accumulation, making it suitable for WDG formula systems sensitive to foam.
Appearance and Physical Properties: It appears as a light yellow to 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 6.5 to 8.5, showing good compatibility with most pesticide active ingredients and dispersants.
2. Key Performance Parameters
Recommended Dosage: The addition ratio in WDG formulations is 1.5% - 3.5%. For highly hydrophobic active ingredients (such as trifluralin and metolachlor), it can be adjusted to 3% - 5%. 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 ≤20 seconds, and the foam height is ≤5mm (the average foam height of similar products in the industry is about 8 - 12mm).
Disintegration Assistance: When compounded with a dispersant, it can shorten the disintegration time of WDG particles by 15% - 25%, and there is no obvious foam overflow during the disintegration process.
Compatibility and Stability:
Compatibility: It is compatible with naphthalene sulfonate dispersants (e.g., HDB-382), non-ionic surfactants (e.g., fatty alcohol polyoxyethylene ether), and most pesticide active ingredients (e.g., triadimefon, malathion), without problems such as stratification, precipitation, or abnormal foam increase.
Environmental Stability: Within the temperature range of -5℃ - 50℃ and pH range of 5.5 - 9.0, the fluctuation of wetting and defoaming performance is ≤5%; after 12 months of storage at room temperature, the retention rate of active ingredients is ≥97%.
3. Application Scenarios
Core Application Fields:
Agricultural Pesticide WDG Preparation: Focus on pesticide formulations sensitive to foam, such as pre-emergence herbicide WDG for paddy fields (to prevent drug solution loss due to floating foam) and insecticide WDG for greenhouse vegetables (to reduce foam-induced blockage of spraying equipment).
Chemical Low-Foam Wetting Treatment: Used for wetting hydrophobic powders (e.g., PTFE micropowder, silicone powder) in the coating and ink industries, ensuring no excessive foam during the dispersion of powders in aqueous systems, thus improving product appearance and performance stability.
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
Balanced Low-Foam Property and Wettability: While ensuring rapid wetting (contact angle ≤20 seconds), the foam height is controlled within 5mm, solving the pain point of "high wettability accompanied by high foam" of traditional wetting agents.
Strong Versatility: Suitable for more than 85% of WDG product types, especially meeting the low-foam demand of hydrophobic active ingredients. No additional defoamer is needed, simplifying formula costs.
Significant Cost-Effectiveness: A low addition amount (1.5% - 3.5%) can achieve the dual effects of "wetting + defoaming". Compared with the compound scheme of "wetting agent + defoamer", the comprehensive cost is reduced by 10% - 18%.
Safety and Environmental Friendliness: The acute oral toxicity LD50 is >2000mg/kg (low-toxicity level), and the biodegradation rate (BOD5/CODcr) is ≥0.42, complying with domestic and international environmental standards for pesticide additives.
5. Precautions for Use
When mixing the formula, it is recommended to premix HDB-1903X with the dispersant evenly before adding the active ingredient, to avoid fluctuations in defoaming performance caused by excessive local concentration.
It should be stored in a sealed manner in a cool and ventilated place (temperature ≤35℃), avoiding direct sunlight; if slight stratification occurs, it does not affect the performance after stirring evenly.
For strong oxidizing active ingredients (e.g., potassium permanganate 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 016 - 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) 6.5 - 8.5, foam height (0.1% aqueous solution, Ross-Miles foam meter method) ≤10mm, total content of heavy metals (lead, cadmium) ≤10mg/kg.
