PROCESS FOR ENCAPSULATING A HYDROPHOBIC ACTIVE

Described are processes for encapsulating a hydrophobic active in a core-shell mesocapsule comprising preparing a high internal phase ratio emulsion having a continuous aqueous phase and a dispersed oil phase comprising at least one hydrophobic active and one or more pre-polymers, reducing the volum...

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Bibliographische Detailangaben
Hauptverfasser:	MALOTKY DAVID L, SCHMIDT DALE C
Format:	Patent
Sprache:	eng
Schlagworte:	AGRICULTURE ANIMAL HUSBANDRY BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES, AS HERBICIDES CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY FISHING FORESTRY HUMAN NECESSITIES HUNTING HYGIENE MEDICAL OR VETERINARY SCIENCE PERFORMING OPERATIONS PEST REPELLANTS OR ATTRACTANTS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PLANT GROWTH REGULATORS PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTSTHEREOF SPECIFIC USE OF COSMETICS OR SIMILAR TOILETPREPARATIONS THEIR RELEVANT APPARATUS TRANSPORTING TRAPPING
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Beschreibung
Zusammenfassung:	Described are processes for encapsulating a hydrophobic active in a core-shell mesocapsule comprising preparing a high internal phase ratio emulsion having a continuous aqueous phase and a dispersed oil phase comprising at least one hydrophobic active and one or more pre-polymers, reducing the volume fraction of the high internal phase ratio emulsion below 0.74 with an aqueous phase stream, and then forming a dispersion of core-shell mesocapsules containing hydrophobic active by either: i) allowing the reduced volume fraction emulsion to sit for 12 hours when the pre-polymer is isocyanate, or ii) contacting the reduced volume fraction emulsion with a third aqueous stream comprising a cross-linking agent.