Microcapsule powder

A process for making hydrophobicized powders of micro- and/or nanocapsules involving the steps of: (a) providing an aqueous polymer solution containing at least one active ingredient and at least one hydrophilic polymer; (b) providing an oil component heated to a temperature above a gel point of the...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	GRISONI PHILIPPE
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOSITIONS BASED THEREON GENERAL PROCESSES OF COMPOUNDING HUMAN NECESSITIES HYGIENE MEDICAL OR VETERINARY SCIENCE METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES SPECIFIC USE OF COSMETICS OR SIMILAR TOILETPREPARATIONS THEIR PREPARATION OR CHEMICAL WORKING-UP THEIR RELEVANT APPARATUS TRANSPORTING WORKING-UP
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Beschreibung
Zusammenfassung:	A process for making hydrophobicized powders of micro- and/or nanocapsules involving the steps of: (a) providing an aqueous polymer solution containing at least one active ingredient and at least one hydrophilic polymer; (b) providing an oil component heated to a temperature above a gel point of the aqueous polymer solution; (c) dispersing (a) in (b) in the presence of a water-in-oil emulsifier to form a dispersion; (d) cooling the dispersion to a temperature below the gel point of the aqueous polymer solution to form micro- and/or nanocapsules containing the active ingredient encapsulated therein; (e) harvesting the micro- and/or nanocapsules from the dispersion; and (f) contacting the micro- and/or nanocapsules with an oil-absorbing auxiliary ingredient.