Capsule for cosmetics

Patent metadata

Field	Value
Publication number	US-12239722-B2
Application number	US-202017625408-A
Country	US
Kind code	B2
Filing date	Jul 8, 2020
Priority date	Jul 9, 2019
Publication date	Mar 4, 2025
Grant date	Mar 4, 2025

Abstract

The present invention relates to a method for producing a capsule for cosmetics. The capsule for cosmetics produced according to the present invention has the advantage of being capable of stably storing an active ingredient and, unlike conventional technology, despite its large size, giving less texture upon rupturing.

First claim

The invention claimed is:

1. A method for producing a capsule for cosmetics, the method comprising:
preparing an emulsion by mixing a continuous phase comprising a polymer having at least two carboxyl groups and a dispersed phase comprising a polyvalent cation transporter; and
adjusting the pH of the emulsion to 10 or less, followed by gelation,
wherein the step of adjusting the pH of the emulsion to 10 or less is performed in a range of 1 minute to 120 minutes after the emulsion is prepared.

2. The method of claim 1 , wherein the polymer having at least two carboxyl groups is a compound represented by the following Chemical Formula 1:

in Chemical Formula 1, R comprises at least one selected from the group consisting of an alkylene having 1 to 50 carbon atoms and a cyclic hydrocarbon having 3 to 60 carbon atoms.

3. The method of claim 1 , wherein a content of the polymer having at least two carboxyl groups is 0.001 to 30 parts by weight with respect to a total weight of the continuous phase of 100 parts by weight.

4. The method of claim 1 , wherein a solvent of the continuous phase is water.

5. The method of claim 1 , wherein the polyvalent cation transporter is a compound which releases polyvalent cations at a pH of 10 or less.

6. The method of claim 5 , wherein the polyvalent cation transporter comprises at least one selected from the group consisting of a silicate compound, an oxide compound and a salt compound, which comprise polyvalent cations.

7. The method of claim 1 , wherein a content of the polyvalent cation transporter is 0.002 to 30 parts by weight with respect to a total weight of the dispersed phase of 100 parts by weight.

8. The method of claim 1 , wherein a solvent of the dispersed phase comprises at least one selected from the group consisting of a hydrocarbon-based solvent; a solvent comprising an ether group; a solvent comprising an ester group; a solvent comprising a ketone group; a solvent comprising benzene; a haloalkane-based solvent; and a silicone-based solvent.

9. The method of claim 1 , wherein the dispersed phase further comprises an active ingredient, wherein the active ingredient comprises at least one selected from the group consisting of a fragrance, a dye, a catalyst, an antioxidant and a drug.

10. The method of claim 1 , wherein the preparation of the emulsion is performed under a condition of 1 to 16000 RPM.

11. The method of claim 1 , wherein the gelation is performed under conditions of 0 to 100° C., 1 to 1440 minutes and 1 to 6000 RPM.

12. A capsule for cosmetics prepared by the method of claim 1 , wherein the capsule has a diameter of 10 to 10,000 μm and a wall thickness of 0.05 to 100 μm.

Assignees

• Lg Household & Health Care Ltd

Inventors

• Park No Jin
• Hwang Byung Woo
• Shim Woo Sun

Classifications

• A61Q19/00

  Preparations for care of the skin · CPC title

• A61K2800/56

  Compounds, absorbed onto or entrapped into a solid carrier, e.g. encapsulated perfumes, inclusion compounds, sustained release forms · CPC title

• A61K8/8147

  Homopolymers or copolymers of acids; Metal or ammonium salts thereof, e.g. crotonic acid, (meth)acrylic acid; Compositions of derivatives of such polymers · CPC title

• A61K8/733

  Alginic acid; Salts thereof · CPC title

• A61K8/26

  Aluminium; Compounds thereof · CPC title