OIL DISPERSIONS (OD)
An OD is a non aqueous suspension concentrate. It combines a very good biological efficacy with an environmental friendly formulation. The active ingredient is dispersed in oils or methylated crop oils.
therefore main features are :
• No Aromatic Solvent
• Non aqueous formulation
• Non Flammable & low volatility
• Higher efficiency,
• No Labeling issue
- TYPICAL COMPOSITION
Active Ingredient 40 – 200 g/l
Emulsifier 100 – 200 g/l
Dispersant 50 – 100 g/l
Rheology Modifier 50 – 100 g/l
Stabilizer 1 - 10 g/l
Oil or Methyl Ester up to 1 Liter
Particle size 2 – 4 μm
Viscosity (Brookfield, #2, 20 rpm) 1000 - 1500 cPs
Emulsion stability Excellent
Suspensibility > 90 %
Efficacy Similar to EC
Production Process Similar to S.C, water is replaced by Oil media
- WHY ODS HAVE A BRIGHT FUTURE
ODs have several advantages vs standard formulation.
OD as a replacement for EC
Nowadays EC are under a strong regulatory pressure to replace toxic and flammable solvents with a less toxic and non flammable solutions. OD meets these needs: the oil content gives a favorable eco-toxicological profile guarantying a very high biological efficacy.
• No toxic and no flammable formulations
• Very high biological efficacy
OD as a replacement for SC
Suspension concentrates are very safe formulation but the aqueous media is normally not ideal to boost pesticide’s biological efficacy. Growers, as standard practice, add tank mix adjuvants to guarantee an higher performance. OD, with his oil content, guarantees the highest biological results. For water sensitive active ingredients OD represents the sole technical solution to liquid formulation.
• Very safe formulation along with high biological performance
• Ideal for active ingredients not stable in water
OD as an alternative to WDG
Water dispersible granules are very safe but are quite expensive. Optimal biological efficacy requires adjuvants. OD with his oil content and better particle size distribution combines high efficacy with better cost.
• Better efficacy at lower cost
- FORMULATION CHALLENGES IN ODs
OD formulation presents several challenges in production. To obtain a good and stable formulation over the time, optimal formulation additives are required in addition to optimum process. A particular attention must be given to the rheological agent.
Its dispersion and activation are key to the stability of the formulation over time.
Here bellow are listed some important requirements for additives:
Perfectly dispersible in the Oil
No phase separation
Excellent Oil Emulsification
Good Coverage and Penetration
For a good stability over the time a crucial factor is the rheological agent.
This should meet the following properties:
• Provide the right yield value
• Provide the right viscosity
• Be homogeneously dispersed and activated in the formulation
Production process must ensure:
• Total activation of the Rheological agent
• Even distribution in the whole formulation
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