In SL formulations active ingredient contents between 10 – 50 % can generally be realized.
The pesticide is dissolved in water or a water-soluble organic solvent. To enhance the efficiency and efficacy of the spray mixture, penetration enhancers and wetting agents are often included. Also, water-insoluble co-formulants might be added, for example, anti-foam agents.
For a long-term stable formulation the pesticide must be resistant to hydrolysis. Especially when ionic actives are formulated, a high level of foam might be formed.
|Penetration or wetting adjuvants||5-25|
|Stabilizer (pH, buffer, anti flocculation agents)||0-20|
|Water or a water soluble solvent||to 100|
|LUCRAMUL® AG 4802||Aqueous surfactant blend (TFA free)||Compatible with glyphosate/glufosinate|
|LUCRAMUL® AG 4820||Aqueous surfactant blend (TFA free)||Compatible with glyphosate/glufosinate|
|LUCRAMUL® LOFO 1||Low foaming aqueous surfactant blend (TFA free)||Compatible with glyphosate/glufosinate|
|LUCRAMUL® LOFO 2||Low foaming aqueous surfactant blend (TFA free)||Compatible with glyphosate/glufosinate|
EPA can be submitted on request
Finding the best surfactants for generating efficient formulations can be difficult. Here we introduce four built-in additives for soluble concentrate (SL) formulations showing excellent results as wetting agents. Two of them (LUCRAMUL® LOFO 1 and LUCRAMUL® LOFO 2) are designed for low foam formation.
Surface tension and foam persistency was tested with spray mixtures containing 1% of the following glufosinate ammonium SL formulations:
|Conventional surfactants||1||200||AG 4820*||280|
|Low foam surfactants||4||400||LOFO 1**||250|
* sodium laurylether sulfate (SLES) based
** alkyl poly glycoside (APG) based
The LUCRAMUL® AG types and the LUCRAMUL® LOFO types have a sufficient strength in lowering the dynamic surface tension:
The dynamic surface tension profiles of LUCRAMUL® AG types indicate good wetting properties, whereas a lower foam formation was observed with the LUCRAMUL® LOFO types. LUCRAMUL® LOFO 1 shows remarkably good properties in both measurements producing the lowest amount of foam and the best dynamic surface tension.
The foam volume of the formulations 4-6 containing LUCRAMUL® LOFO 1 or LOFO 2 directly after mixing is significantly lower compared to formulation 1-3 using conventional surfactants. After 30 minutes the foam volume is decreased even further.
LOFO 1 is best used for highly concentrated formulations (>35% active). For low active content LOFO 2 forms stable and efficient formulations.