High-load liquid agrochemical formulations are important innovations that optimize pest control through increased transportation efficiency, reduced volume of containers to dispose and decreased use of solvent resulting in a reduced environmental impact. Development of these formulations, however, is not without challenges such as low active ingredient solubility, tank-mixing problems and high viscosity at low temperatures.  Due to the high concentration of active ingredient in high-load compositions, there is less room for other coformulants and therefore fewer options available to control high viscosity that may be inherent in such compositions. High viscosity makes the formulation difficult to measure and pump, especially at the lower temperatures typically encountered in early spring.  In addition, the viscosity of emulsifiable concentrate formulations may impact pourability and emulsion formation stability and may cause stickiness or adhesion to the application equipment walls and filters, which could become a hindrance for product adoption in the market.  A high-load emulsifiable concentrate type agrochemical formulation case study is used to investigate the effect of solvent chemistries and their physical-chemical properties on the viscosity of the formulation and its tank mix dilutions at low temperatures.

Influence of solvent chemistry on the viscosity of high-load emulsifiable concentrate agrochemical formulations

2019 Fall National Meeting

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