Microcapsule

• Main Authors: GAUCKLER, LUDWIG JULIUS, KRAUS JUILLERAT, FRANZISKA, GONZENBACH, URS THOMAS, STURZENEGGER, PHILIP NOAH
• Format: Patent
• Language: English
• Published: 13.06.2013
• Subjects: ADHESIVES; ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND WAXES; BLASTING; CANDLES; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; DETERGENT COMPOSITIONS; DETERGENTS; DYES; FATTY ACIDS THEREFROM; FOODS OR FOODSTUFFS; FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BYSUBCLASSES A23B - A23J; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEAT EXCHANGE IN GENERAL; HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS,IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT; HEATING; HUMAN NECESSITIES; HYGIENE; LAKES; LIGHTING; MECHANICAL ENGINEERING; MEDICAL OR VETERINARY SCIENCE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; MORDANTS; NATURAL RESINS; ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES; PAINTS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; POLISHES; PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL; RECOVERY OF GLYCEROL; RESIN SOAPS; SOAP OR SOAP-MAKING; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OFNUTRITIVE QUALITIES, PHYSICAL TREATMENT; THEIR RELEVANT APPARATUS; THEIR TREATMENT, NOT COVERED BY OTHER CLASSES; TRANSPORTING; USE OF SINGLE SUBSTANCES AS DETERGENTS; WEAPONS

A microcapsule (10, 20), in particular of spherical shape, comprising a hollow capsule core (11, 21) encased by a capsule shell (12, 22), is characterized in that the capsule shell (12, 22) is at least partially made of hydrated cementitious material. Furthermore, a method for the production of microcapsule comprises the steps of: a) preparing of a suspension (100) of particulate cementitious material (111) in a solvent (125) and b) preparing a dispersion (200) by mixing the suspension (100) of step a) with an immiscible fluid (130), so that (i) the suspension (100) is present as a dispersed phase in the fluid (130) as a dispersion medium or that (ii) the fluid (130) is present as the dispersed phase in the suspension (100) as the dispersion medium, such that the particulate material (111) of the suspension adsorbs at least partially at a phase boundary between the fluid (130) and the suspension (100), and c) allowing the particulate material (112) adsorbed at the phase boundary to hydrate with the formation of an individual microcapsule (115).