Agricultural Manufacturing Process Aids

Agricultural manufacturing process aids are additives used inside an agrochemical plant — not on the crop — to control foam, hold solids in suspension, and stabilize concentrates during mixing, milling, and filling. The three workhorses here are a silicone defoamer (a PDMS antifoam emulsion), fumed silica for rheology, and xanthan gum as a suspending agent. Specify by the unit operation that is failing, not by a product label.

Foam is the expensive problem in high-shear mixing, wet milling, and filling: entrained air cuts fill accuracy and slows throughput. A polydimethylsiloxane antifoam emulsion knocks foam down at low dose and persists across a batch, unlike a transient alcohol knockdown. Dose it into the make-down tank ahead of the high-shear steps rather than chasing foam after it forms.

Suspension concentrates (SC) and suspoemulsions (SE) settle on the shelf. Fumed silica builds a shear-thinning network that resists settling, and xanthan gum adds low-shear yield stress toward the same goal. The trade-off is real: more anti-settling structure raises viscosity and can make pumping and pouring harder, so balance shelf stability against handling at the target fill temperature.

• Foam control in high-shear mixing, wet milling, and filling of agrochemical concentrates
• Anti-settling and suspension stability for SC, SE, and WDG concentrate platforms
• Rheology and yield-stress control to prevent sedimentation during storage and shipment
• Defoaming in EC make-down and tank-mix preparation at the formulation plant
• Viscosity adjustment of flowable concentrates to a target pour and pump profile

• Polydimethylsiloxane / dimethicone — PubChem
• Silica, amorphous fumed — PubChem
• Xanthan gum — PubChem