Method for preparing microcapsules and microparticles of controlled size

The present invention relates to a method for the preparation of microparticles and solid microcapsules comprising the following steps:a) the addition, with stirring, of composition C′2 in a composition C3, the compositions C′2 and C3 not being miscible with each other, the composition C′2 being eit...

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Bibliographische Detailangaben
Hauptverfasser:	Demoulin, Damien, Walters, Jamie
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES AGRICULTURE ANIMAL HUSBANDRY BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES, AS HERBICIDES CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOSITIONS BASED THEREON DYES FISHING FOODS OR FOODSTUFFS FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BYSUBCLASSES A23B - A23J FORESTRY HUMAN NECESSITIES HUNTING HYGIENE LAKES MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS MEDICAL OR VETERINARY SCIENCE METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS MORDANTS NATURAL RESINS ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES ORGANIC MACROMOLECULAR COMPOUNDS PAINTS PERFORMING OPERATIONS PEST REPELLANTS OR ATTRACTANTS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PLANT GROWTH REGULATORS POLISHES PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTSTHEREOF PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL SPECIFIC USE OF COSMETICS OR SIMILAR TOILETPREPARATIONS THEIR PREPARATION OR CHEMICAL WORKING-UP THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OFNUTRITIVE QUALITIES, PHYSICAL TREATMENT THEIR RELEVANT APPARATUS THEIR TREATMENT, NOT COVERED BY OTHER CLASSES TRANSPORTING TRAPPING
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Beschreibung
Zusammenfassung:	The present invention relates to a method for the preparation of microparticles and solid microcapsules comprising the following steps:a) the addition, with stirring, of composition C′2 in a composition C3, the compositions C′2 and C3 not being miscible with each other, the composition C′2 being either a monophasic composition C2 or an emulsion (E1) comprising drops of a composition C1, comprising at least one active ingredient, dispersed in a polymeric composition C2, the compositions C1 and C2 not being miscible in each other, the viscosity of composition C3 being greater than 10,000 mPa·s at 25° C. at a shear rate of s−1 and being less than 10,000 mPa·s at 25° C. at a shear rate of between 100 s−1 and 100,000 s−1, wherein an emulsion (E2) is obtainedb) applying shear to the emulsion (E2), the applied shear rate being less than 1000 s−1, wherein an emulsion (E3) is obtained; andc) the polymerization of the composition C′2.