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US 2021/0008518 A1Published application
Process for preparing microcapsules with improved deposition
AssigneeFirmenich SA
InventorsLei Shi, Lahoussine Ouali, Lei Han
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Abstract
Described herein is a process for producing perfume- or flavor-containing microcapsules with improved deposition of encapsulated actives on targeted surfaces such as fiber, hair and skin, which can be used in home or personal care products. Also described herein are microcapsules obtainable by such a process and consumer products including these microcapsules.
Claims18
A process for the preparation of a microcapsule slurry comprising the steps of:
- a) dissolving at least one polyisocyanate having at least two isocyanate groups in a hydrophobic active ingredient to form an oil phase;
- b) dispersing the oil phase obtained in step a) into an aqueous solution comprising a mixture of at least one ionic polyvinyl alcohol with at least one cationic polymer to form an oil-in-water emulsion;
- and
- c) applying conditions sufficient to induce interfacial polymerization to form a microcapsule slurry;
- wherein no polymeric cross-linker bearing amino groups with a molecular weight equal or higher than 2 000 g/mol is added at any stage of the process.
2 more elements
Dependencies are inferred from the claim text.