Due to the fluctuation of the quality of Emamectin benzoate, the problematic phenomena of Indoxacarb emamectin benzoate suspension concentrate products are mainly:
- Small oily clusters sink to the bottom after shearing.
- The technicals melt during the grinding process, and the material is bonded to the dispersing disc.
- Filter the slurry after grinding, small soft caking will be found on the sieve.
Figure 1. Problematic phenomena of Emamectin benzoate suspension concentrate mass production
How to solve the production problems of emamectin benzoate suspension concentrate caused by quality change in TC?
Let's learn about the SINVOCHEM solution by use of polycarboxylate based dispersant SP-C08!
Dispersant SP-C08
SP-C08 is a high molecular weight polycarboxylate dispersant with high lipophilic group. SP-C08 can improve the multi-point adsorption with Emamectin benzoate and is not easy to be interfered by salt impurities, and the affinity between the active ingredient and water is greatly reduced.
Application case: Indoxacarb emamectin benzoate suspension concentrate
Heat Resistance Test
Emamectin benzoate after change contain more salt impurity with low melting point, if the grinding temperature is too high, resulting in the dissolution of the impurities in the system, and the conductivity of the system will increase.
Figure 2. Variation of conductivity with grinding time and temperature in different formulation systems
By testing the conductivity of the different formulation samples after grinding under different temperature conditions. It was demonstrated that there was no significant difference in the conductivity between SP-C08 formulation and the market benchmark formulation when the grinding temperature is around 30℃. When the grinding temperature was elevated over 40℃, there was a significant increase in the conductivity of the market benchmark formulation, whereas there was no significant change in the conductivity of the SP-C08 formulation.
Filtered the slurry after grinding, there was caking problem of market benchmark formulation. but the SP-C08 formulation did not suffer from the problem of caking caused by the melting of active ingredient.
It is shown that the dispersant SP-C08 has excellent heat resistance, low melting point impurities are not easy to melt.
Particle Size Test
|
|
SP-C08 D50-D90-D98(μm) |
Market benchmark D50-D90-D98(μm) |
|
Particle size (initial) |
1.01-3.24-5.34 |
1.79-3.61-7.94 |
|
Particle size (after heat storage) |
1.29-3.90-5.71 |
2.05-8.52-10.98 |
Table 1. Particle size detection before and after thermal storage
Dispersant SP-C08 was proven to have excellent particle size control ability of the Indoxacarb emamectin benzoate, with no significant increase in particle size after hot storage compared to Market benchmark dispersant.