# US 10,946,221 B2 · Method for treating hair, kit, and use of the kit

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- Number: US 10,946,221 B2
- Document ID: US10946221B2
- Status: Granted
- Kind: B2
- Application number: 16/500,630
- Filed: 2018-04-11
- Published: 2020-03-26
- Granted: 2021-03-16
- Earliest claimed: 2017-04-12
- Applicants: Coty Inc.
- Inventors: Andreas Flohr
- Web page: https://patentgrep.com/patent/US10946221B2

## CPC

- A61Q 5/10: Preparations for permanently dyeing the hair
- A61K 8/362: Polycarboxylic acids
- A61K 8/365: Hydroxycarboxylic acids; Ketocarboxylic acids
- A61K 2800/884: Sequential application
- A61Q 5/065: {Preparations for temporary colouring the hair, e.g. direct dyes}
- A61Q 5/08: Preparations for bleaching the hair
- A61Q 5/12: Preparations containing hair conditioners
- A61Q: SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- 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)

## Abstract

A method, a kit and a first composition for treating hair are provided. The method for treating hair comprises applying to the hair a first composition comprising in a cosmetically acceptable carrier, one or more at least bi-functional carboxylic acids, or cosmetically acceptable salts thereof, or mixtures thereof, and applying to the hair a second composition comprising in a cosmetically acceptable carrier, one or more at least bi-functional carboxylic acids, or cosmetically acceptable salts thereof, or mixtures thereof, wherein the first composition has a pH from 7 to 13 and the second composition has a pH from 3 to 7.

## Claims

### Claim 1

A method for treating hair comprising:
(a) mixing a first composition having a pH from 7 to 13 with a hair treatment composition to form a mixed composition, the hair treatment composition comprising one of a bleaching agent, a coloring agent, and a permanent hair waving agent;
(b1) applying to the hair the mixed composition having a pH from 7 to 13; and
(c) applying to the hair a second composition having a pH from 3 to 7, wherein
each of the first composition and the second composition comprises in a cosmetically acceptable carrier, one or more at least bi-functional carboxylic acids of Formula 1, or cosmetically acceptable salts thereof, or mixtures thereof,
wherein Formula 1 is HOOC—Ra-(O—Rb)n-COOH, wherein Ra is selected from the group consisting of C1-C10 alkylene, C1-C10 cycloalkylene, C1-C10 alkenylene, C6-C12 (alkyl)arylene, Rb is C2-C4 alkylene, n is an integer from 0 to 4, wherein Ra or each Rb are substituted with one or more substituents selected from —COOH, —OH, —NH2, —SH, and ═O, and wherein the total number of carbon atoms in Ra plus Rb is 12 or less.

### Claim 2 (depends on 1)

The method of claim 1, wherein a difference between the pH of the first composition and the pH of the hair treatment composition is 1.5 or less.

### Claim 3 (depends on 1)

The method of claim 1, wherein a difference between the pH of the hair treatment composition and the pH of the mixed composition is 0.3 or less.

### Claim 4 (depends on 1)

The method of claim 1, wherein the hair treatment composition comprises one or more oxidizing agents, oxidative dye precursors including one or more couplers and one or more primary intermediates, or both oxidizing agent(s) and oxidative dye precursors.

### Claim 5 (depends on 1)

The method of claim 1, wherein the hair treatment composition comprises one or more reducing agents.

### Claim 6 (depends on 1)

The method of claim 1, wherein the one or more at least bi-functional carboxylic acid of the first composition and of the second composition are identical.

### Claim 7 (depends on 1)

The method of claim 1, wherein the one or more at least bi-functional carboxylic acid is selected from the group consisting of Oxalic Acid, Malonic Acid, Succinic Acid, Glutaric Acid, Adipic Acid, Pimelic Acid, Suberic Acid, Azelaic Acid, Sebacic Acid, Maleic Acid, Fumaric Acid, Glutaconic Acid, Traumatic Acid, Muconic Acid, Glutinic Acid, Citraconic Acid, Mesaconic Acid, Malic Acid, Aspartic Acid, Glutamic Acid, Tartronic Acid, Tartaric Acid, Diaminopimelic Acid, Saccharic Acid, Mesoxalic Acid, Oxaloacetic Acid, Acetonedicarboxylic Acid, Arabinaric Acid, Phthalic Acid, Isophthalic Acid, Terephthalic Acid, Diphenic Acid, 2,6-Naphthalenedicarboxylic Acid, Citric Acid, Isocitric Acid, Aconitic Acid, Propane-1,2,3-tricarboxylic Acid, Trimesic Acid, Methanetetracarboxylic Acid, 1,2,3,4-Benzenetetracarboxylic Acid, 2,2′-(ethane-1,2-diylbis(azanediyl))disuccinic Acid, Aspergillomarasine Acid, Ethylenetetracarboxylic Acid, or derivatives thereof, or cosmetically acceptable salts thereof.

### Claim 8 (depends on 1)

The method of claim 1, wherein the first composition comprises from 0.1% to 25% of the one or more at least bi-functional carboxylic acid, or cosmetically acceptable salt thereof, by total weight of the first composition, or wherein the second composition comprises from 0.1% to 25% of the one or more at least bi-functional carboxylic acid, or cosmetically acceptable salt thereof, by total weight of the second composition.

### Claim 9 (depends on 1)

The method of claim 1, wherein the first composition has a pH from 7.5 to 12 and wherein the second composition has a pH from 3.5 to 6.5.

### Claim 10 (depends on 1)

The method of claim 1, wherein the first composition is substantially free of a further component selected from the group of diamines, polyamines, primary amines, fatty acids, silicones, oxidative dye precursors, direct dyes, reducing agents, unsaturated compounds having one or more carboxylic acid groups, and mixtures thereof.

### Claim 11 (depends on 1)

The method of claim 1, further comprising:
(d) rinsing, shampooing, conditioning the hair, or a combination thereof, wherein step (d) occurs subsequent to step (bi) or step (c).

### Claim 12

A kit comprising:
(1) a first composition having a pH from 7 to 13;
(2) a second composition having a pH from 3 to 7;
wherein each of the first and the second composition comprises in a cosmetically acceptable carrier, one or more at least bi-functional carboxylic acids of Formula 1, or cosmetically acceptable salts thereof, or mixtures thereof;
wherein Formula 1 is HOOC—Ra-(O—Rb)n-COOH, wherein Ra is selected from the group consisting of C1-C10 alkylene, C1-C10 cycloalkylene, C1-C10 alkenylene, C6-C12 (alkyl)arylene, Rb is C2-C4 alkylene, n is an integer from 0 to 4, wherein Ra or each Rb are substituted with one or more substituents selected from —COOH, —OH, —NH2, —SH, and ═O, and wherein the total number of carbon atoms in Ra plus Rb is 12 or less;
wherein the first composition, and the second composition are, separately packaged.