High-Content ZnO Additives (700 g/L – 1500 g/L) for Foliar Fertilizers
1. Sources of ZnO in Vietnam Currently, the Vietnamese market imports four major sources of Zinc Oxide (ZnO) from Thailand, Taiwan, Malaysia, and China. Each source has its own production method, resulting in significant differences in purity, impurity levels, particle size, and application range. This diversity provides fertilizer manufacturers […]
1. Sources of ZnO in Vietnam
Currently, the Vietnamese market imports four major sources of Zinc Oxide (ZnO) from Thailand, Taiwan, Malaysia, and China. Each source has its own production method, resulting in significant differences in purity, impurity levels, particle size, and application range.
This diversity provides fertilizer manufacturers with more options but also creates challenges in selecting the right additives for each raw material source.
2. Challenges in Producing High-Content ZnO SC
- Dispersion and Viscosity Issues
At high ZnO concentrations, poor dispersion or uncontrolled viscosity can cause the product to thicken excessively. This not only affects product quality but also complicates storage and application.
- The Challenge of High Specific Gravity
This is the most critical obstacle in producing ZnO suspension concentrates (SC). With a specific gravity of about 5.6 g/cm³, ZnO is one of the heaviest materials commonly used in concentrated suspension fertilizer formulations.
According to Stokes’ Law of sedimentation velocity, particles with higher density settle faster. With a density over five times that of water, ZnO particles tend to sink quickly unless supported by a robust additive system that can “lift” and maintain long-term suspension stability.
Therefore, selecting and combining the right additives is key to producing high-content ZnO SC products with lasting stability.
3. Amigos’ Solution
Amigos proudly offers a comprehensive additive package for ZnO SC formulations, enabling flexible performance from 700 g/L – 900 g/L up to 1500 g/L, compatible with all four major raw material sources (Thailand, Taiwan, Malaysia, and China).
Comparison of ZnO Additive Solutions
|
Product |
Composition |
Main Functions |
Compatible ZnO Source |
Key Advantages |
|
Airtech® 2121 |
Blend of ethoxylated and alkylated surfactants |
• Effective dispersion |
Thailand / Malaysia / Taiwan |
Cost-effective, high performance |
|
Airtech®HK 90 |
Methacrylate copolymer surfactant blend |
• Superior micronutrient dispersion |
Universal (all ZnO sources) |
Premium quality, low foaming, versatile |
Guidance for Selection
- Airtech® 2121 is the optimal choice when cost efficiency is a priority, working well with common ZnO sources from Thailand, Malaysia, and Taiwan.
- Airtech®HK 90 is the premium solution for demanding applications, particularly when handling difficult ZnO sources or when maximum stability and low foaming are required.
With proven experience and advanced additive technology, Amigos is committed to delivering the best solutions to help foliar fertilizer manufacturers develop high-content ZnO SC products that are stable, effective, and reliable for Vietnamese agriculture.
4. Reference Formula
ZnO 765 g/L SC – High-Stability Foliar Fertilizer Suspension
|
No. |
Ingredient |
% (w/w) |
g/L |
|
1 |
ZnO (Thailand/China) |
45 |
765 |
|
2 |
Airtech®HK 90 |
5 |
85 |
|
3 |
Myglycol™ MPG-E |
1 |
17 |
|
4 |
Silicone DF-1 |
0.2 |
3.4 |
|
5 |
Esentia® RM-80 |
0.2 |
3.4 |
|
6 |
Vinkocide™ CMIF |
0.2 |
3.4 |
|
7 |
Water |
48.4 |
822.8 |
Stability Test
- At room temperature (30°C): pH 6–8, density 1.7, milky white
- Accelerated test at high temperature (14 days): pH 6–8, density 1.7, milky white
Note
The information, ingredients, and ratios provided are based on Amigos’ technical expertise and field experience, intended as a useful reference for R&D, testing, and formulation optimization.
Since production conditions and technical requirements may vary, users are advised to conduct practical trials and make necessary adjustments for their specific applications. Amigos assumes no liability for risks or losses arising from the use of this information in practice.
📩 For more details on ZnO additive solutions, please contact Amigos for technical consultation and support.
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