# US 2023/0053843 A1 · Composition for brightening or whitening keratin materials

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- Number: US 2023/0053843 A1
- Document ID: US20230053843A1
- Status: Published application
- Kind: A1
- Application number: 17/789,870
- Filed: 2019-12-30
- Published: 2023-02-23
- Earliest claimed: 2019-12-30
- Assignees: L'oreal
- Applicants: L'oreal
- Inventors: Chi MA; Xiuxia WANG
- Web page: https://patentgrep.com/patent/US20230053843A1

## CPC

- A61K 8/062: {Oil-in-water emulsions}
- A61K 8/19: containing inorganic ingredients
- A61K 8/25: Silicon; Compounds thereof
- A61K 8/29: Titanium; Compounds thereof
- A61K 8/375: {the alcohol moiety containing more than one hydroxy group}
- A61K 8/55: Phosphorus compounds
- A61K 8/8152: {Homopolymers or copolymers of esters, e.g. (meth)acrylic acid esters; Compositions of derivatives of such polymers}
- A61K 8/86: Polyethers
- A61Q 1/02: Preparations containing skin colorants, e.g. pigments (preparations in powder form A61Q1/12)
- A61Q 19/02: for chemically bleaching or whitening the skin
- A61K 2800/43: Pigments; Dyes
- 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

## Abstract

A composition for brightening or whitening keratin materials in the form of an emulsion, comprises an oily phase dispersed in an aqueous phase, and comprises: i)from 2.0 wt. % to 10.0 wt% of at least one white particles, relative the total weight of the composition; ii) at least one anionic terpolymer as a thickener; and iii) an emulsifier system including: a)at least one alkyl phosphate salt; b)at least one polyoxyethylene oxide C12-C24 fatty acid ester; and c)at least one glyceryl C12-C24 fatty acid ester. A cosmetic process for brightening or whitening keratin materials, in particular human skin, comprises applying the composition as defined above to the keratin materials.

## Claims

### Claim 1

A composition for brightening or whitening keratin materials in the form of an emulsion, comprising an oily phase dispersed in an aqueous phase, and comprising:
i) from 2.0 wt. % to 10.0 wt. %of at least one white particles, relative the total weight of the composition;
ii) at least one anionic terpolymer as a thickener; and
iii) an emulsifier system including:
a) at least one alkyl phosphate salt;
b) at least one polyoxyethylene oxide C12-C24 fatty acid ester; and
c) at least one glyceryl C12-C24 fatty acid ester.

### Claim 2 (depends on 1)

Composition of claim 1, wherein the white particles are selected from boron nitride, titanium dioxide, silica, pearl, mica, synthetic mica, mica based pearl pigment particles, composite particles comprising titanium dioxide and a substrate selected from alumina, silica, barium sulfate, glass, mica and synthetic mica, or mixtures thereof.

### Claim 3 (depends on 1)

Composition of claim 1, wherein the white particles are present in the composition in an amount ranging from 2.5 wt. % to 8.0 wt. %, preferably from 3 wt. % to 6 wt. %, relative to the total weight of the composition.

### Claim 4 (depends on 1)

Composition of claim 1, wherein the anionic terpolymer is selected from linear or branched and/or crosslinked terpolymers of at least one monomer (1) bearing an acid function being in free or partially or totally salified form with a nonionic monomer (2) chosen from N, N-dimethylacrylamide and 2-hydroxyethyl acrylate and at least one polyoxyethylenated alkyl acrylate monomer (3) of formula (I):
wherein:
R1 represents a hydrogen atom,
R represents a linear or branched C8-C16 alkyl radical, and
n represents a number ranging from 1 to 10.

### Claim 5 (depends on 1)

Composition of claim 1, wherein the anionic terpolymer is present in an amount ranging from 0.1 wt. %to 5 wt. % relative to the total weight of the composition.

### Claim 6 (depends on 1)

Composition of claim 1, wherein the alkyl phosphate salt is selected from monoalkyl phosphate salts of formula (II) :
wherein:
R1 represents a linear or branched, alkyl or alkylene comprising from 4 to 24 carbon atoms, ;
A represents an alkylene group comprising from 2 to 10 carbon atoms;
n represents an integer ranging from 0 to 20;
X represents alkali metals .

### Claim 7 (depends on 1)

Composition according to claim 1, wherein the alkyl phosphate salt is present in the composition in an amount ranging from 0.1 wt. %to 10 wt. % based on the total weight of the composition.

### Claim 8 (depends on 1)

Composition according to claim 1, wherein the polyoxyethylene oxide portion of the C12-C24 fatty acid ester is a polyethylene glycol (PEG) having 50 to 150 units of PEG.

### Claim 9 (depends on 1)

Composition according to claim 1, wherein the polyoxyethylene oxide C12-C24 fatty acid ester is present in the composition in an amount ranging from 0.1 wt. %to 10 wt. % based on the total weight of the composition.

### Claim 10 (depends on 1)

Composition according to claim 1 , wherein the glyceryl C12-C24 fatty acid ester is selected from glyceryl laurate, glyceryl oleate, glyceryl stearate and glyceryl palmitate.

### Claim 11 (depends on 1)

The composition according to claim 1 , wherein the glyceryl C12-C24 fatty acid ester is present in the composition in an amount ranging from 0.1 wt. %to 10 wt. % based on the total weight of the composition.

### Claim 12 (depends on 1)

The composition according to claim 1 , wherein the weight ratio R of alkyl phosphate salt, polyoxyethylene oxide C12-C24 fatty acid ester and glyceryl C12-C24 fatty acid ester as defined below is 1: 0.5-2: 0.5-2, :
R=alkyl phosphate salt/polyoxyethylene oxide C12-C24 fatty acid ester/glyceryl C12-C24 fatty acid ester.

### Claim 13 (depends on 1)

The composition according to claim 1 comprising, relative to the total weight of the composition:
i) from 3 wt. %to 6 wt. %of at least one white particle selected from the group consisting of boron nitride, titanium dioxide, mica and a mixture thereof;
ii) from 0.3 wt. %to 1 wt. %of at least one linear or branched and/or crosslinked terpolymer of
at least one monomer (1) selected from the group consisting of styrenesulfonic acid, ethylsulfonic acid and 2-methyl-2- [(1-oxo-2-propenyl] amino] -1-propanesulfonic acid, in free or partially or totally salified form,
a nonionic monomer (2) selected from the group consisting of N, N-dimethylacrylamide and 2-hydroxyethyl acrylate, and
at least one polyoxyethylenated alkyl acrylate monomer (3) of formula (I):
wherein:
R1 represents a hydrogen atom,
R represents a linear or branched C8-C16 alkyl radical, and
n represents a number ranging from 1 to 10; and
iii) an emulsifier system including:
a) from 0.5 wt. %to 2 wt. %of potassium cetyl phosphate;
b) from 0.5 wt. %to 2 wt. %of at least one polyoxyethylene oxide C12-C24 fatty acid ester selected from PEG 75 stearate, PEG 100 stearate, PEG 75 oleate, PEG 100 oleate, PEG 75 palmitate and PEG 100 palmite, and a mixture thereof; and
c) from 0.5 wt. %to 2 wt. %of at least one glyceryl C12-C24 fatty acid ester selected from glyceryl laurate, glyceryl oleate, glyceryl stearate, glyceryl palmitate, and a mixture thereof.

### Claim 14 (depends on 1)

A cosmetic process for brightening or whitening keratin materials, comprising applying the composition of claim 1 on the keratin materials.