Encapsulated essential oils

Details Encapsulated essential oils Encapsulated essential oils

B - Operations, Transporting

01

J

B01J 13/16 (2006.01) A01N 65/08 (2009.01) A01N 25/28 (2006.01) A01P 1/00 (2006.01) A01P 3/00 (2006.01) C08L 75/00 (2006.01)

Patent

CA 2525263

The invention provides a process for the preparation of essential oil microcapsules comprising dissolving a di- or polyisocyanate into an essential oil, emulsifying the resulting mixture in an aqueous solution containing a di- or polyamine, and or a di or polyhydroxy compound to effect encapsulation of said essential oil through interfacial polymerization, whereby there is formed a polyurea and/orpolyurethane film around the essential oil droplets which film enhances the stability of said essential oil, reduces its evaporation rate and controls its release rate when applied to a substrate.

L'invention concerne un procédé de préparation de microcapsules d'huiles essentielles comprenant des étapes de dissolution d'un di ou polyisocyanate en une huile essentielle, de mise en émulsion du mélange obtenu dans une solution aqueuse contenant une di ou polyamine et/ou un composé di ou polyhydroxy afin d'effectuer l'encapsulation de ladite huile essentielle par polymérisation interfaciale permettant la formation d'un film de polyurée et/ou polyuréthanne autour des gouttes d'huiles essentielles, ledit film améliorant la stabilité de l'huile essentielle, réduisant sa vitesse d'évaporation et surveillant sa vitesse de libération lors de son application sur un substrat.

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