# US 11,077,032 B2 · Stable dispersions containing drops comprising a gelling agent

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- Number: US 11,077,032 B2
- Document ID: US11077032B2
- Status: Granted
- Kind: B2
- Application number: 15/760,961
- Filed: 2016-09-16
- Published: 2019-02-28
- Granted: 2021-08-03
- Earliest claimed: 2015-09-18
- Assignees: Capsum
- Applicants: Capsum
- Inventors: Mathieu Goutayer; Amélie Pujol
- Web page: https://patentgrep.com/patent/US11077032B2

## CPC

- A61K 8/11: Encapsulated compositions
- A61K 8/042: {Gels}
- A61K 8/044: {Suspensions}
- A61K 8/19: containing inorganic ingredients
- A61K 8/345: {containing more than one hydroxy group}
- A61K 8/37: Esters of carboxylic acids
- A61K 8/732: {Starch; Amylose; Amylopectin; Derivatives thereof}
- A61K 8/8147: {Homopolymers or copolymers of acids; Metal or ammonium salts thereof, e.g. crotonic acid, (meth)acrylic acid; Compositions of derivatives of such polymers}
- A61K 8/898: containing nitrogen, e.g. amodimethicone, trimethyl silyl amodimethicone or dimethicone propyl PG-betaine
- A61Q 1/02: Preparations containing skin colorants, e.g. pigments (preparations in powder form A61Q1/12)
- A61Q 13/00: Formulations or additives for perfume preparations (essential oils or perfumes per se C11B9/00)
- A61Q 19/00: Preparations for care of the skin
- A61Q 19/08: Anti-ageing preparations
- B01J 13/0052: {Preparation of gels}
- B01J 13/0065: {containing an organic phase}
- B01J 13/10: Complex coacervation, i.e. interaction of oppositely charged particles
- A61K 2800/412: Microsized, i.e. having sizes between 0.1 and 100 microns
- A61K 2800/5424: anionic
- A61K 2800/5426: cationic
- A61K 2800/594: Mixtures of polymers
- A61K: PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES (devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms A61J3/00; chemical aspects of, or use of materials for deodorisation of air, for disinfection or sterilisation, or for bandages, dressings, absorbent pads or surgical articles A61L; soap compositions C11D)
- A61Q: SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS

## Abstract

A dispersion containing a dispersed phase comprising drops and a continuous aqueous phase, preferably in the form of a gel, in which the drops comprise a fatty phase containing at least one gelling agent and a shell, wherein the shell comprises at least one anionic polymer and at least one cationic polymer.

## Claims

### Claim 1

A dispersion containing a dispersed fatty phase comprising drops and a continuous aqueous phase in which the drops comprise a fatty phase containing at least one gelling agent and a shell, wherein the shell comprises at least one anionic polymer and at least one cationic polymer, and wherein said gelling agent is a heat-sensitive gelling agent.

### Claim 2 (depends on 1)

The dispersion according to claim 1, wherein the gelling agent is chosen from organic, inorganic, polymeric or molecular lipophilic gelling agents; solid fatty substances at ambient temperature and pressure; and mixtures thereof.

### Claim 3 (depends on 2)

The dispersion according to claim 2, wherein the gelling agent is selected from the group consisting of polyacrylates, esters of dextrin and fatty acid(s), glycerol esters of fatty acid(s), polyamides, and mixtures thereof.

### Claim 4 (depends on 3)

The dispersion according to claim 3, wherein the esters of dextrin and fatty acid(s) are selected from the group consisting of dextrin palmitates, dextrin myristates, dextrin palmitates/ethylhexanoates, and mixtures thereof.

### Claim 5 (depends on 1)

The dispersion according to claim 1, comprising from 0.5% to 99.99% by weight of gelling agent(s) relative to the total weight of the fatty phase.

### Claim 6 (depends on 1)

The dispersion according to claim 1, wherein the cationic polymer is a silicone polymer modified with a primary, secondary or tertiary amine function.

### Claim 7 (depends on 1)

The dispersion according to claim 1, wherein the cationic polymer has the following formula:
in which:
R1, R2 and R3, independently of each other, represent OH or CH3;
R4 represents a group —CH2— or a group —X—NH—, in which X is a divalent alkylene radical in C3 or C4;
x is an integer from 10 to 5000;
y is an integer between 2 and 1000; and
z is an integer between 0 and 10.

### Claim 8 (depends on 1)

The dispersion according to claim 1, wherein each drop comprises from 0.01% to 10% by weight of cationic polymer(s) relative to the total weight of the fatty phase.

### Claim 9 (depends on 1)

The dispersion according to claim 1, wherein the anionic polymer is a polymer comprising monomeric units having at least one carboxylic acid chemical function.

### Claim 10 (depends on 1)

The dispersion according claim 1, wherein the dispersion comprises from 0.01% to 5% by weight of anionic polymer(s) relative to the total weight of the dispersion.

### Claim 11 (depends on 1)

The dispersion according to claim 1, further comprising at least one biological/cosmetic active agent chosen from hydrating agents, cicatrizing agents, depigmenting agents, UV filters, desquamating agents, antioxidants, active agents stimulating the synthesis of dermal macromeoleculars, active agents stimulating the synthesis of epidermal macromoleculars, dermodecontracting agents, antiperspirants, soothing agents, anti-aging agents, and mixtures thereof.

### Claim 12 (depends on 1)

The dispersion according to claim 1, wherein the average diameter of the drops of the dispersed phase is from 0.2 μm to 3000 μm.

### Claim 13 (depends on 1)

The dispersion according to claim 1, characterized in that it does not comprise surfactant.

### Claim 14 (depends on 1)

The dispersion according to claim 1, comprising at least 5% by weight of glycerin relative to the total weight of the dispersion.

### Claim 15 (depends on 1)

The dispersion of claim 1, wherein the continuous aqueous phase is in the form of a gel.

### Claim 16 (depends on 1)

A method for preparing the dispersion according to claim 1, comprising the following steps:
optionally heating an oily fluid FI at a temperature of from 40° C. to 150° C.;
contacting an aqueous fluid FE and the oily fluid FI; and
the formation of drops of fatty phase, consisting of the oily fluid FI, dispersed in a continuous aqueous phase, constituted by fluid FE, wherein the drops comprise a shell isolating the core of the drops of the fatty phase of the dispersion,
in which:
the oily fluid FI comprises at least one cationic polymer, and at least one gelling agent, and
the aqueous fluid FE comprises water and at least one anionic polymer.

### Claim 17 (depends on 1)

A composition comprising a dispersion according to claim 1, in association with a physiologically acceptable medium.

### Claim 18 (depends on 17)

A non-therapeutic method for the cosmetic treatment of a keratin material, comprising a step of applying to the keratin material at least one layer of a cosmetic composition according to claim 17.

### Claim 19 (depends on 1)

A non-therapeutic method for the cosmetic treatment of a keratin material, comprising a step of applying to the keratin material a dispersion according to claim 1.