Surfactants in agrochemical formulations

Details Surfactants in agrochemical formulations Surfactants in agrochemical formulations

B - Operations, Transporting

01

F

B01F 17/52 (2006.01) A01N 25/30 (2006.01) C05F 3/06 (2006.01) A01N 57/20 (2006.01) C08G 65/333 (2006.01)

Patent

CA 2756758

Surfactant compounds which include an amine ended polyalkylene glycol hydrophile linked to C22 to C60 mainly hydrocarbyl, particularly composite hydrocarbyl, especially derived from a polymerised fatty acid and/or an aralkyl substituted phenol, hydrophobe, are useful in dispersing solids, particularly active agrochemicals, in aqueous media, or as adjuvants in agrochemical formulations, particularly of water soluble non-selective herbicides. In particular the hydrophobe is derived from polymerised fatty acids, such as dimer and, especially, trimer acids or from aralkyl substituted phenols. Aqueous dispersions using such surfactants can remain stable even with substantial concentrations of electrolyte e.g. in stable agrochemical dispersions including water soluble electrolyte agrochemical, such as glyphosate and/or ammonium sulphate.

L'invention concerne des composés tensioactifs qui comprennent un polyalkylèneglycol à terminaison amine lié à un hydrocarbyle principalement de C22 à C60, en particulier un hydrocarbyle composite, en particulier dérivé d'un acide gras polymérisé et/ou un phénol substitué par un aralkyle, hydrophobe, sont utiles dans la dispersion de matières solides, en particulier des substances agrochimiques actives, dans un milieu aqueux, ou en tant qu'adjuvants dans des formulations agrochimiques, en particulier d'herbicides hydrosolubles non sélectifs. En particulier, l'agent hydrophobe est un dérivé d'acides gras polymérisés, tel qu'un dimère et, en particulier, des trimères d'acides ou de phénols substitués par un aralkyle. Des dispersions aqueuses utilisant de tels tensioactifs peuvent rester stables, même avec des concentrations substantielles d'électrolyte, par exemple dans des dispersions agrochimiques stables comprenant un agent agrochimique électrolyte hydrosoluble, tel que le glyphosate et/ou le sulfate d'ammonium.

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