Process for preparing microcapsules

Patent metadata

Field	Value
Publication number	US-2021106964-A1
Application number	US-201916981047-A
Country	US
Kind code	A1
Filing date	Jun 19, 2019
Priority date	Jun 21, 2018
Publication date	Apr 15, 2021
Grant date	—

Abstract

Described herein is a new process for the preparation of core-shell microcapsules. Also described herein are microcapsules. Also described herein are consumer products including said microcapsules, in particular perfumed consumer products or flavoured consumer products.

First claim

1 - A process for preparing a core-shell microcapsule slurry, said process comprising the steps of:
a) dispersing an oil phase comprising a hydrophobic material, into an aqueous phase comprising a globular protein to form an oil-in-water emulsion; b) adding an aqueous solution comprising a polysaccharide into the oil-in-water emulsion; and c) applying a sufficient condition to induce the denaturation of the protein to form core-shell microcapsules in the form of a slurry.

2 - The process according to claim 1 , characterized by the fact that the mean oil droplet size in the oil-in-water emulsion is greater than 10 microns.

3 - The process according to claim 1 , characterized by the fact that the globular protein is selected from the group consisting of whey protein, beta-lactoglobulin, ovalbumine, bovine serum albumin, vegetable protein, and mixtures thereof.

4 - The process according to claim 1 , characterized by the fact that the polysaccharide is selected from the group consisting of pectin, carrageenans, alginate, and mixtures thereof.

5 - The process according to claim 1 , characterized by the fact that the protein is whey protein and the polysaccharide is pectin.

6 - The process according to claim 1 , characterized by the fact that the denaturation of the protein in step c) is induced by a heating step.

7 - The process according to claim 6 , characterized by the fact that the heating step is carried out at a temperature T den comprised between 50 and 100° C.

8 - The process according to claim 1 , characterized by the fact that the weight ratio between the oil phase and the protein is comprised between 1 and 10.

9 - The process according to claim 1 , characterized by the fact that the weight ratio between the protein and the polysaccharide is comprised between 1 and 10.

10 - The process according to claim 1 , characterized by the fact that a calcium solution is further added in the emulsion obtained in step a) and/or in the mixture obtained in step b).

11 - The process according to claim 1 , characterized by the fact that a crosslinker is added in the mixture obtained in step b) and/or in the mixture obtained in step c).

12 - The process according to claim 1 , characterized by the fact that:
a polyfunctional monomer is further dissolved in the oil phase in step a), and the process comprises a further step before step c) consisting of applying conditions sufficient to induce interfacial polymerization of the polyfunctional monomer.

13 - A microcapsule slurry comprising at least one microcapsule made of:
an oil-based core comprising a hydrophobic material, and at least one shell comprising a protein and a polysaccharide.

14 - The microcapsule slurry according to claim 13 , wherein the microcapsules are made of:
an oil-based core comprising a hydrophobic material; and an inner shell made of a polymerized polyisocyanate having at least two isocyanate functional groups and an outer shell comprising whey protein and pectin.

15 - A composition comprising microcapsules according to claim 13 , wherein the composition is in the form of a perfumed product.

16 - The process according to claim 1 , wherein the hydrophobic material is a flavor or a perfume.

17 - The process according to claim 1 , wherein the polysaccharide is high methoxy pectin.

18 - The process according to claim 1 , wherein the heating step is carried out at a temperature T den comprised between 80 and 100° C.

19 - The process according to claim 1 , wherein the crosslinker is selected from the group consisting of transglutaminase, glutaraldehyde, genipin, and mixtures thereof.

20 - A composition comprising microcapsules as defined in claim 13 , wherein the composition is in the form of a perfumed product selected from the group consisting of body care products and laundry care products, or in the form of a flavored product selected from the group consisting of snacks, dairy products, bakery products, and confectionary.

Assignees

• Firmenich & Cie

Inventors

• Elabbadi Amal
• Erni Philipp
• Jacquemond Marlene

Classifications

• B01J13/10 Primary

  Complex coacervation, i.e. interaction of oppositely charged particles · CPC title

• C11D3/505

  encapsulated or adsorbed on a carrier, e.g. zeolite or clay · CPC title

• B01J13/16

  Interfacial polymerisation · CPC title

• B01J13/14

  Polymerisation; cross-linking · CPC title

• A23L27/72

  Encapsulation · CPC title