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US 9,962,674 B2Granted
Hybrid microcapsules
AssigneeFirmenich SA
InventorsYongtao Wu, Lahoussine Ouali
Life of this patent
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Abstract
The present invention relates to a process for the preparation of organic-inorganic microcapsules, with a flavor or fragrance core and a hybrid shell composed of at least two types of inorganic particles that are cross-linked. Microcapsules obtained by said process are also an object of the invention. Consumer products comprising said capsules, in particular perfumed consumer products in the form of home care or personal care products, are also part of the invention.
Claims20
A process for the preparation of an organic-inorganic microcapsule comprising the steps of:
- 1) suspending in water first inorganic particles having at least one amine functionality and second inorganic particles having at least one hydroxyl functionality, to form an aqueous phase;
- 2) suspending at least one polyisocyanate in a perfume or flavor oil to form an oil phase;
- 3) adding the oil phase to the water phase and mixing them to form an oil-in-water Pickering emulsion under conditions allowing interfacial reaction between the at least one polyisocyanate and the functional groups on the first and second inorganic particles to form an inorganic-organic microcapsule, wherein the first and second inorganic particles are selectively cross-linked in the emulsion with the at least one polyisocyanate.
Dependencies are inferred from the claim text.