# US 2021/0275429 A1 · Cosmetic treatment process for a keratin material

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- Number: US 2021/0275429 A1
- Document ID: US20210275429A1
- Status: Published application
- Kind: A1
- Application number: 16/482,888
- Filed: 2018-02-15
- Published: 2021-09-09
- Earliest claimed: 2017-02-27
- Assignees: L'oreal
- Applicants: L'oreal
- Inventors: Jennyfer Cazares Delgadillo; Dominique BORDEAUX
- Web page: https://patentgrep.com/patent/US20210275429A1

## CPC

- A61K 8/817: {Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen; Compositions or derivatives of such polymers, e.g. vinylimidazol, vinylcaprolactame, allylamines (Polyquaternium 6)}
- A61N 1/0428: {Specially adapted for iontophoresis, e.g. AC, DC or including drug reservoirs}
- A45D 19/0066: {Coloring or bleaching}
- A61K 8/731: {Cellulose; Quaternized cellulose derivatives}
- A61K 8/736: {Chitin; Chitosan; Derivatives thereof}
- A61K 8/8182: {Copolymers of vinyl-pyrrolidones. Compositions of derivatives of such polymers}
- A61N 1/30: Apparatus for iontophoresis, {i.e. transfer of media in ionic state by an electromotoric force into the body}, or cataphoresis
- A61N 1/325: {for iontophoresis, i.e. transfer of media in ionic state by an electromotoric force into the body (electrodes for external use A61N1/0428)}
- A61Q 5/10: Preparations for permanently dyeing the hair
- A61Q 5/12: Preparations containing hair conditioners
- A61Q 19/00: Preparations for care of the skin
- A45D 2200/20: Additional enhancing means
- A45D 2200/25: Kits
- A61K 2800/4324: in preparations for permanently dyeing the hair
- A61K 2800/5426: cationic
- A61K 2800/83: Electrophoresis; Electrodes; Electrolytic phenomena
- A61K 2800/87: Application Devices; Containers; Packaging
- A61K 2800/88: Two- or multipart kits
- A61N 1/328: {for improving the appearance of the skin, e.g. facial toning or wrinkle treatment}
- 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)
- A61N: ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY (measurement of bioelectric currents A61B; surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body A61B18/00; anaesthetic apparatus in general A61M; incandescent lamps H01K; infrared radiators for heating H05B)
- A45D: HAIRDRESSING OR SHAVING EQUIPMENT (wigs, toupees or the like A41G3/00, A41G5/00; hairdressers' chairs A47C1/04; hair cutting appliances, razors B26B); EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
- A61Q: SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS

## Abstract

A cosmetic treatment process for a keratin material, including placing the keratin material in contact with at least one cationic polymer with a molecular weight of between 500 and 5,000,000 daltons, and either simultaneously with or consecutively to the placing the keratin material in contact with said cationic polymer, an electric current is applied using at least one electrode for a time that is sufficient to deposit at the surface of the keratin material an effective amount of said cationic polymer.

## Claims

### Claim 1

A cosmetic treatment process for a keratin material, comprising:
placing in the keratin material in contact with at least one cationic polymer with a molecular weight of between 500 and 5,000,000 daltons, and
either simultaneously with or consecutively to placing the keratin material in contact with said cationic polymer, applying an electric current using at least one electrode for a time that is sufficient to deposit at the surface of the keratin material an effective amount of said cationic polymer, when electrically powered with a supply.

### Claim 2 (depends on 1)

The process as claimed in claim 1, wherein the application of the current is performed with a mean current density at the surface of contact with the keratin materials of between 0.01 mA/cm2 rms and 1 mA/cm2 rms.

### Claim 3 (depends on 1)

The process as claimed in claim 1, wherein the current is applied for a time of between 30 seconds and 30 minutes.

### Claim 4 (depends on 1)

The process as claimed in claim 1, comprising the simultaneous delivery of a continuous current and a pulsed current and the generation of a pulsed current stimulus with a mean current density on the surface of the keratin materials ranging from 0.05 mA/cm2 rms to 0.5 mA/cm2 rms, a pulse time ranging from 200 microseconds to 300 microseconds and a pulse frequency ranging from 100 Hz to 300 Hz.

### Claim 5 (depends on 1)

The process as claimed in claim 1, wherein current intensity is modified for the purposes of locally adjusting a given degree of deposition of the cationic polymers on a keratin material.

### Claim 6 (depends on 1)

The process as claimed in claim 1, wherein which the current intensity is modified as a function of location on the keratin materials, in which the keratin materials are hair and the current intensity is varied according to the location on the hair spanning from the root of the hair to the end of the hair.

### Claim 7 (depends on 1)

The process as claimed in claim 1, wherein which the current intensity is modified as a function of a locally detected characteristic, especially a color.

### Claim 8 (depends on 1)

The process as claimed in claim 1, further comprising an additional step consecutive to the step of applying the electric current, the additional step comprising placing in contact of the deposited cationic polymers with the anionic form of an additional cosmetic active agent and/or care active agent, chosen especially from dyestuffs.

### Claim 9 (depends on 1)

The process as claimed in claim 1, wherein the cationic polymer has a cationic charge density at least equal to 0.7, ranging from 0.9 to 7 meq/g.

### Claim 10 (depends on 1)

The process as claimed in claim 1, comprising:
a) the generation of a continuous current stimulus with a mean current density of between 0.01 mA/cm2 rms and 0.5 mA/cm2 rms; and
b) the generation of a current stimulus, especially a unidirectional pulsed current with a mean current density of between 0.01 mA/cm2 rms and 10 mA/cm2 rms, a pulse time ranging from 10 microseconds to 500 microseconds; and a pulse frequency ranging from 10 Hz to 500 Hz, the continuous current and the pulsed current being applied for a time that is sufficient to deposit said cationic polymer on the surface.

### Claim 11 (depends on 1)

A device for the cosmetic treatment of keratin materials, for the use of the treatment process as claimed in claim 1, when the device is electrically powered by a supply.

### Claim 12 (depends on 1)

A kit comprising:
a) a topical composition for caring for and/or washing keratin materials, comprising at least an effective amount of at least one cationic polymer with a molecular weight ranging from 500 to 5,000,000 daltons, and
b) a device for treatment by applying an electric current, which is suitable for performing a process as claimed in claim 1, when the device is electrically powered by a supply.