# US 11,433,011 B2 · Methods for treating chemically relaxed hair > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,433,011 B2 - Document ID: US11433011B2 - Status: Granted - Kind: B2 - Application number: 15/603,889 - Filed: 2017-05-24 - Published: 2018-11-29 - Granted: 2022-09-06 - Earliest claimed: 2017-05-24 - Assignees: L'oreal - Applicants: L'oreal - Inventors: Kwana Patterson; Barbara Mitchell; Anand Mahadeshwar - Web page: https://patentgrep.com/patent/US11433011B2 ## CPC - A61K 8/41: Amines - A45D 7/04: chemical - A61K 8/36: Carboxylic acids; Salts or anhydrides thereof - A61K 8/362: Polycarboxylic acids - A61Q 5/04: Preparations for permanent waving or straightening the hair - A61K 2800/884: Sequential application - 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) - 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 The instant disclosure relates to methods for treating chemically relaxed hair. The methods include applying a neutralizing composition to the chemically relaxed hair, the neutralizing composition comprising: at least 0.5 wt. % of at least one carboxylic acid, one or more C2-C6 monoalkanolamines, and water. The neutralizing composition is allowed to remain on the hair for a period of time. The hair is also treated with a neutralizing conditioner, which is a different than the neutralizing composition. The neutralizing conditioner includes: at least 0.5 wt. % of at least one carboxylic acid, one or more C2-C6 monoalkanolamines, one or more cationic surfactants, and water. The neutralizing conditioner is allowed to remain on the hair for a period of time. After treatment with a neutralizing composition and a neutralizing conditioner, the hair may be further treated with a shampoo, a conditioner, a conditioning shampoo, etc., dried, and/or styled. ## Claims ### Claim 1 A method for treating chemically relaxed hair comprising: A. applying a neutralizing composition to hair within 24 hours after a lanthionizing chemical relaxer composition has been rinsed from the hair, the neutralizing composition comprising: a. at least 0.5 wt. % of at least one carboxylic acid selected from the group consisting of maleic acid, oxalic acid, malonic acid, malic acid, glutaric acid, citraconic acid, citric acid, glycolic acid, succinic acid, adipic acid, tartaric acid, fumaric acid, sebacic acid, benzoic acid, glyoxylic acid monohydrate, a salt thereof, and a mixture thereof; b. one or more C2-C6 monoalkanolamines; and c. water; B. allowing the neutralizing composition to remain on the hair for about 10 seconds to about 30 minutes; C. after allowing the neutralizing composition to remain on the hair for about 10 seconds to about 30 minutes, without rinsing the neutralizing composition from the hair, applying a neutralizing conditioner, the neutralizing conditioner comprising: i. at least 0.5 wt. % of at least one carboxylic acid selected from the group consisting of maleic acid, oxalic acid, malonic acid, malic acid, glutaric acid, citraconic acid, citric acid, glycolic acid, succinic acid, adipic acid, tartaric acid, fumaric acid, sebacic acid, benzoic acid, glyoxylic acid monohydrate, and a mixture thereof; ii. one or more C2-C6 monoalkanolamines; iii. one or more cationic surfactants; and iv. water; D. allowing the neutralizing conditioner to remain on the hair for about 5 minutes to about 30 minutes; and E. rinsing the neutralizing conditioner and the neutralizing composition from the hair. ### Claim 2 (depends on 1) The method of claim 1, wherein the ratio of the total amount of the at least one carboxylic acid, a salt thereof, or mixture thereof in the neutralizing composition to the total amount of the one or more monoalkanolamines in the neutralizing composition is about 1:1 to about 5:1. ### Claim 3 (depends on 1) The method of claim 1, wherein the neutralizing composition comprises at least 0.5 wt. % of maleic acid, malonic acid, a salt thereof, or a mixture thereof. ### Claim 4 (depends on 1) The method of claim 1, wherein the neutralizing composition comprises at least 0.5 to about 8 wt. % of the at least one carboxylic acid, based on the total weight of the neutralizing composition. ### Claim 5 (depends on 1) The method of claim 1, wherein the neutralizing conditioner comprises at least 0.5 wt. % of maleic acid, malonic acid, a salt thereof, or a mixture thereof. ### Claim 6 (depends on 1) The method of claim 1, wherein the neutralizing conditioner comprises at least 0.5 to about 8 wt. % of the at least one carboxylic acid, based on the total weight of the neutralizing conditioner. ### Claim 7 (depends on 1) The method of claim 1, wherein the neutralizing composition comprises monoethanolamine. ### Claim 8 (depends on 1) The method of claim 1, wherein the neutralizing composition comprises about 0.2 to about 5 wt. % of the one or more C2-C6 monoalkanolamines, based on the total weight of the neutralizing composition. ### Claim 9 (depends on 1) The method of claim 1, wherein the neutralizing conditioner comprises monoethanolamine. ### Claim 10 (depends on 1) The method of claim 1, wherein the neutralizing conditioner comprises about 0.2 to about 5 wt. % of the one or more C2-C6 monoalkanolamines, based on the total weight of the neutralizing conditioner. ### Claim 11 (depends on 1) The method of claim 1, wherein the neutralizing composition comprises about 85 to about 98 wt. % water. ### Claim 12 (depends on 1) The method of claim 1, wherein the neutralizing conditioner comprises about 60 to about 90 wt. % water. ### Claim 13 (depends on 1) The method of claim 1, wherein the neutralizing composition is allowed to remain on the hair for about 5 to 15 minutes before rinsing from the hair. ### Claim 14 (depends on 1) The method of claim 1, wherein the neutralizing conditioner is allowed to remain on the hair for about 5 to 15 minutes before rinsing. ### Claim 15 (depends on 1) The method of claim 1, wherein the one or more cationic surfactants are selected from the group consisting of cetrimonium chloride, cetrimonium methosulfate, stearimonium chloride, behentrimonium chloride, behentrimonium methosulfate, behenamidopropyltrimonium methosulfate, stearamidopropyltrimonium chloride, arachidtrimonium chloride, distearyldimonium chloride, dicetyldimonium chloride, tricetylmonium chloride, oleamidopropyl dimethylamine, linoleamidopropyl dimethylamine, stearamidopropyl dimethylamine, isostearamidopropyl dimethylamine, oleyl hydroxyethyl imidazoline, stearamidopropyldimethylamine, behenamidopropyldimethylamine, behenamidopropyldiethylamine, behenamidoethyldiethyl-amine, behenamidoethyldimethylamine, arachidamidopropyldimethylamine, arachidamido-propyidiethylamine, arachidamidoethyidiethylamine, arachidamidoethyidimethylamine, quaternium-91, and a mixture thereof. ### Claim 16 (depends on 1) The method of claim 1 wherein the total amount of the one or more cationic surfactants in the neutralizing conditioner are about 0.1 to about 15 wt. %, based on the total weight of the neutralizing conditioner. ### Claim 17 (depends on 1) The method of claim 1, wherein the neutralizing conditioner further comprises: v. one or more fatty compounds. ### Claim 18 (depends on 17) The method of claim 17, wherein the one or more fatty compounds are selected from the group consisting of oils, waxes, butter, alkanes, fatty alcohols, fatty acids, fatty alcohol derivatives, fatty acid derivatives, esters of fatty alcohols, hydroxy-substituted fatty acids, waxes, triglyceride compounds, lanolin, ceramide, and a mixture thereof. ### Claim 19 (depends on 17) The method of claim 17, wherein the total amount of the one or more fatty compounds is about 1 to about 40 wt. %, based on the total weight of the neutralizing conditioner. ### Claim 20 (depends on 1) The method of claim 1, wherein the neutralizing conditioner further comprises: vi. one or more water-soluble solvents. ### Claim 21 (depends on 20) The method of claim 20, wherein the one or more water-soluble solvents are selected from the group consisting of polyhydric alcohols, glycol ethers, C1-4 alcohols, and a mixture thereof. ### Claim 22 (depends on 20) The method of claim 20, wherein the total amount of water-soluble solvents in the neutralizing conditioner are about 1 to about 40 wt. %, based on the total weight of the neutralizing conditioner. ### Claim 23 (depends on 1) The method of claim 1, wherein the method comprises increasing a mean Young's modulus of the hair by at least 10% relative to hair treated with only a chemical relaxer composition. ### Claim 24 (depends on 1) The method of claim 1, wherein the method comprises increasing a mean break stress of the hair by at least 10% relative to hair treated with only a chemical relaxer composition.