# US 11,992,548 B2 · Hair treatment compositions, kits, and methods of use > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,992,548 B2 - Document ID: US11992548B2 - Status: Granted - Kind: B2 - Application number: 17/104,240 - Filed: 2020-11-25 - Published: 2021-05-27 - Granted: 2024-05-28 - Earliest claimed: 2019-11-27 - Assignees: L'oreal - Applicants: L'oreal - Inventors: Erika Suzanne Ritchie; Rachel Ferebee Maher; Ronak Rughani - Web page: https://patentgrep.com/patent/US11992548B2 ## CPC - A61K 8/73: Polysaccharides - A61K 8/22: Peroxides; Oxygen; Ozone - A61K 8/676: {Ascorbic acid, i.e. vitamin C} - A61K 8/736: {Chitin; Chitosan; Derivatives thereof} - A61Q 5/002: {Preparations for repairing the hair, e.g. hair cure} - A61Q 5/10: Preparations for permanently dyeing the hair - A61Q 5/12: Preparations containing hair conditioners - 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 Hair treatment compositions, kits for producing such hair treatment compositions, and methods for using such kits and/or hair treatment compositions are provided for treating hair. Methods for treating hair typically include: obtaining a first composition comprising one or more polysaccharides with amine group(s) and water; adding ascorbic acid and one or more peroxides, peroxo compounds, or combinations thereof to the first composition to obtain a second composition; applying the second composition to hair; and heating the hair, which has the second composition applied thereto, to a temperature above 25° C. Kits for improving hair typically include a first composition comprising one or more polysaccharides with amine group(s) and water; a second composition comprising up to 100 wt. % of ascorbic acid; and a third composition comprising a peroxide, a peroxo compound, or a combination thereof, wherein the first composition, the second composition, and the third composition are separately contained. ## Claims ### Claim 1 A method for treating hair comprising: (i) obtaining a first composition comprising chitosan; (ii) adding ascorbic acid and one or more peroxides to the first composition to obtain a second composition; and (iii) applying the second composition to hair, wherein the second composition has a pH of about 2 to about 6 and comprises: (a) about 0.1 to about 10 wt. % of the chitosan; (b) about 0.01 to about 5 wt. % of ascorbic acid; (c) about 0.01 to about 5 wt. % of the one or more peroxides; (d) about 60 to about 99 wt. % of water; and (e) optionally, about 0.1 to about 5 wt. % of one or more acids selected from tannic acid, caffeic acid, acetic acid, citric acid, gallic acid, or mixtures thereof; wherein the weight percentages are based on a total weight of the second composition. ### Claim 2 (depends on 1) The method of claim 1, further comprising heating the hair, which has the second composition applied thereto, to a temperature of above 25° C. ### Claim 3 (depends on 1) The method of claim 1, wherein the pH of the second composition is about 2.5 to about 5. ### Claim 4 (depends on 1) The method of claim 1, wherein the second composition comprises the one or more acids of (e). ### Claim 5 (depends on 4) The method of claim 4, wherein the second composition comprises tannic acid. ### Claim 6 (depends on 4) The method of claim 4, wherein the second composition comprises caffeic acid. ### Claim 7 (depends on 4) The method of claim 4, wherein the second composition comprises acetic acid. ### Claim 8 (depends on 4) The method of claim 4, wherein the second composition comprises citric acid. ### Claim 9 (depends on 4) The method of claim 4, wherein the second composition comprises gallic acid. ### Claim 10 (depends on 4) The method of claim 4 comprising heating the hair to a temperature of 30° C. to 200° C. ### Claim 11 (depends on 10) The method of claim 10, wherein the heating is carried out with a blow dryer, a flat iron, a heating hood, or a curling iron. ### Claim 12 (depends on 4) The method of claim 4, wherein the one or more peroxides is hydrogen peroxide. ### Claim 13 (depends on 4) The method of claim 4, wherein the second composition comprises: (a) about 0.1 to about 10 wt. % chitosan; (b) about 0.01 to about 5 wt. % of ascorbic acid; (c) about 0.01 to about 5 wt. % of hydrogen peroxide; (d) about 60 to about 99 wt. % of water; and (e) about 0.1 to about 5 wt. % of one or more acids selected from tannic acid, caffeic acid, citric acid, and gallic acid. ### Claim 14 (depends on 13) The method of claim 13, wherein the second composition comprises: (a) about 0.5 to about 3 wt. % of chitosan; (b) about 0.05 to about 2 wt. % of ascorbic acid; (c) about 0.01 to about 2 wt. % of hydrogen peroxide; (d) about 60 to about 99 wt. % of water; and (e) about 0.1 to about 5 wt. % of one or more acids selected from tannic acid, caffeic acid, citric acid, and gallic acid. ### Claim 15 A method for treating hair comprising: (i) obtaining a first composition comprising chitosan; (ii) adding hydrogen peroxide; and (iii) applying the second composition to hair, wherein the second composition has a pH of about 2.5 to about 5 and comprises: (a) about 0.5 to about 3 wt. % of chitosan; (b) about 0.05 to about 2 wt. % of ascorbic acid; (c) about 0.01 to about 2 wt. % of hydrogen peroxide; (d) about 60 to about 99 wt. % of water; and (e) about 0.1 to about 5 wt. % of one or more acids selected from tannic acid, caffeic acid, citric acid, and gallic acid; wherein the weight percentages are based on a total weight of the second composition; and (iv) heating the hair, which has the second composition applied thereto, to a temperature of 30° C. to 200° C. ### Claim 16 (depends on 15) The method of claim 15, wherein the pH of the second composition is about 3 to about 4. ### Claim 17 (depends on 15) The method of claim 15, wherein the heating is carried out with a blow dryer, a flat iron, a heating hood, or a curling iron. ### Claim 18 (depends on 15) The method of claim 15, wherein the second composition further comprises one or more silicones.