Microcapsules comprising a lipophilic surfactant and oil

B - Operations – Transporting – 01 – J

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B01J 13/00 (2006.01)

Patent

CA 2712454

The invention relates to an aqueous dispersion comprising microcapsules, the capsule wall of which is made of radically polymerised monomers and the capsule core of which comprises at least one oil and at least one lipophilic surfactant. The continuous phase of the dispersion comprises at least one agrochemical. The invention also relates to a method for producing an aqueous dispersion with the steps: i) provision of an aqueous dispersion comprising microcapsules, the capsule wall of which is made of radically polymerised monomers and the capsule core of which comprises at least one oil and at least one lipophilic surfactant (microcapsule crude dispersion), and ii) at least one agrochemical is added. The invention also relates to the use of the microcapsule crude dispersion for producing an aqueous dispersion and to a product comprising, as separate components, a microcapsule crude dispersion and at least one agrochemical for combined use in combating undesired plant growth and/or for controlling undesired insect or acaricide infestation of plants and/or for combating phytopathogenic fungi.

L'invention concerne une dispersion aqueuse comprenant des microcapsules dont l'enveloppe est constituée de monomères ayant subi une polymérisation radicalaire et dont le noyau comprend au moins une huile. Selon l'invention, le noyau de la capsule comprend au moins un tensioactif lipophile et la phase continue de la dispersion comprend au moins un produit agrochimique. L'invention concerne également un procédé pour la production d'une dispersion aqueuse, selon lequel: i) on fournit une dispersion aqueuse comprenant des microcapsules dont l'enveloppe est constituée de monomères ayant subi une polymérisation radicalaire et le noyau comprend au moins une huile et au moins un tensioactif lipophile (dispersion brute de microcapsules), ii) que l'on mélange à au moins un produit agrochimique. L'invention concerne en outre l'utilisation de la dispersion brute de microcapsules pour produire une dispersion aqueuse, ainsi qu'un produit comprenant comme constituants séparés une dispersion brute de microcapsules et au moins un produit agrochimique à utiliser ensemble pour lutter contre la végétation indésirable, l'attaque de plantes par des insectes ou des acariens et/ou des champignons phytopathogènes.

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