Exilva – Liquid Fertilizer compatible Capsule Suspension with Exilva

Results shared by AMVAC Chemical Corporation show that the electrolyte tolerance of Exilva® as a rheology modifier when compared to xanthan gum improves the compatibility of a capsule suspension with NPK liquid fertilizers, preventing gelling or precipitation in the tank and allowing mixing all in one.

Results show that when a capsule suspension (CS) structured with Exilva was compared with the same formulation structured with Xanthan Gum, the following observations were made:

• Frequency sweep on the two CS formulations shows that both formulations have solid-like behaviour at 0.5% strain (G’>G”).
  
  
• Upon mixing the CS formulation with the NPK liquid fertilizer:
  • No precipitation or gelling was observed with the Exilva structured CS formulation
  • Precipitation was observed with the xanthan gum structured CS formulation

• Upon filtering the blend of CS formulation and the NPK liquid fertilizer:
  • Clean and non-clogged sieve/screen was observed with the Exilva structured CS formulation.
  • Precipitate caused clogging of the sieve/screen with the xanthan gum structured CS formulation

Key takeaways:

• Exilva is compatible with high ionic strength systems and improves the compatibility of products with liquid fertilizers.
• Exilva is a rheology modifier that improves product stability and compatibility of formulations.
• Exilva is a bio-based additive that allows mixing crop protection products with fertilizers and nutrients.

Left: Picture of capsule suspensions structured with Exilva and with Xanthan Gum.

Middle: Picture of each capsule suspension (1mL) in the liquid fertilizer (50mL). No precipitation observed in the Exilva formulated system. Precipitation observed in the Xanthan Gum formulated system.

Right: Filtering of the capsule suspension and the liquid fertilizer mix. No residues or precipitates observed in the Exilva formulated system, while precipitates exist in the Xanthan Gum formulated system.