Microencapsulation product and process

B - Operations – Transporting – 01 – J

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B01J 13/14 (2006.01) A01N 25/28 (2006.01) A01N 37/18 (2006.01) A01P 17/00 (2006.01) A61K 8/11 (2006.01) A61Q 17/02 (2006.01)

Patent

CA 2589701

Microcapsules possessing Lewis acid - Lewis base salt walls incorporate water- immiscible materials, such as N,N-diethyl-m-toluamide (DEET), as a core component. Such microcapsules, or similar microcapsules incorporating other core components, may be made by emulsifying a water-immiscible core component in an aqueous solution of one wall-forming reactant, such as the Lewis base, and then mixing that solution with the other wall-forming reactant, such as the Lewis acid. Various adjuvants may be included with the core component to contribute additional characteristics, such as enhancement of a controlled release characteristic or improved mechanical stability.

Microcapsules possédant des parois constituées d'un sel d'acide de Lewis / base de Lewis, qui contiennent des matières non miscibles dans l'eau, telles que le N,N-diéthyl-m-toluamide (DEET), en tant que constituant du noyau. Ces microcapsules, ou des microcapsules similaires comportant d'autres constituants de noyau, peuvent être obtenues en émulsifiant un constituant de noyau non miscible dans l'eau dans une solution aqueuse d'un réactif formant une paroi, tel que la base de Lewis, puis en mélangeant cette solution avec l'autre réactif formant une paroi, tel que de l'acide de Lewis. Divers adjuvants peuvent être ajoutés au constituant de noyau pour conférer des caractéristiques supplémentaires, telles que l'amélioration d'une caractéristique de libération prolongée ou une meilleure stabilité mécanique.

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