# US 11,077,043 B2 · Liquid hair dye composition > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,077,043 B2 - Document ID: US11077043B2 - Status: Granted - Kind: B2 - Application number: 16/649,011 - Filed: 2018-09-20 - Published: 2020-09-17 - Granted: 2021-08-03 - Earliest claimed: 2017-09-20 - Assignees: Kao Corporation - Applicants: Kao Corporation - Inventors: Fumina Abo; Shunsuke Watanabe; Keiji Monda; Takeshi Iizaki - Web page: https://patentgrep.com/patent/US11077043B2 ## CPC - A61K 8/49: containing heterocyclic compounds - A61K 8/345: {containing more than one hydroxy group} - A61Q 5/065: {Preparations for temporary colouring the hair, e.g. direct dyes} - A61K 2800/10: General cosmetic use - A61K 2800/4322: in preparations for temporarily coloring the hair further containing an oxidizing agent - A61K 2800/882: Mixing prior to application - 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) - A61Q: SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS ## Abstract A liquid hair dye composition, comprising components (A) and (B), wherein the content (X) of component (A) in the composition is 1.5 mass % or more and 9.3 mass % or less, the content (Y) of component (B) in the composition is 9 mass % or more and 98.5 mass % or less, and the liquid hair dye composition satisfies the following formula (1) (with the proviso that a liquid hair dye composition which has the content of diol of 50 mass % or more and the content of water of 2 mass % or less is excluded), Y≥10.875X−10.875 (1), (A) an azo dye of the formula (A-1), and (B) a monoalcohol and/or a diol other than alkanolamines. ## Claims ### Claim 1 A liquid hair dye composition, comprising: (A) an azo dye of the formula (A-1): and (B) at least one selected from the group consisting of a lower monoalcohol having 2 or 3 carbon atoms, a monocyclic aromatic monoalcohol, and a diol having 2 to 6 carbon atoms, wherein a content (X) of the component (A) in the composition is from 1.5 mass % to 9.3 mass %, a content (Y) of the component (B) in the composition is from 9 mass % to 98.5 mass %, and the liquid hair dye composition satisfies the formula (1), Y>10.875X−10.875 (1), with a proviso that the liquid hair dye composition is not a composition in which a diol content is 50 mass % or more and a water content is 2 mass % or less. ### Claim 2 (depends on 1) The liquid hair dye composition according to claim 1, further comprising an alkaline agent. ### Claim 3 (depends on 2) The liquid hair dye composition according to claim 2, wherein the alkaline agent is at least one selected from the group consisting of an alkanolamine and a salt thereof, ammonia and a salt thereof, an alkane diamine and a salt thereof, a carbonate, a hydrogen carbonate, and an alkali metal hydroxide. ### Claim 4 (depends on 1) The liquid hair dye composition according to claim 1, wherein a pH at 25° C. when diluted 10 times by mass with water is from 7.5 to 12.0. ### Claim 5 (depends on 1) The liquid hair dye composition according to claim 1, wherein the liquid hair dye composition is suitable for mixing with another liquid preparation before use. ### Claim 6 (depends on 5) The liquid hair dye composition according to claim 5, wherein the other liquid preparation is a hair dye composition. ### Claim 7 (depends on 5) The liquid hair dye composition according to claim 5, wherein the other liquid preparation is a two-agent hair dye composition consisting of a first agent comprising an alkaline agent and an oxidation dye precursor, and a second agent comprising an oxidizing agent. ### Claim 8 (depends on 5) The liquid hair dye composition according to claim 5, wherein the other liquid preparation is a multiple-agent hair dye composition comprising a first agent comprising an alkaline agent and an oxidation dye precursor, and a second agent comprising an oxidizing agent. ### Claim 9 A method for dyeing hair, comprising: mixing a liquid hair dye composition comprising (A) an azo dye of the following formula (A-1) and (B) at least one selected from the group consisting of a lower monoalcohol having 2 or 3 carbon atoms, a monocyclic aromatic monoalcohol, and a diol having 2 to 6 carbon atoms, with another liquid preparation to prepare a mixture: and subsequently applying the mixture to hair for dyeing the hair, wherein a content (X) of the component (A) in the composition is from 1.5 mass % to 9.3 mass %, a content (Y) of the component (B) in the composition is from 9 mass % to 98.5 mass %, and the liquid hair dye composition satisfies the formula (1) Y≥10.875X−10.875 (1), with a proviso that the liquid hair dye composition is not a composition in which a diol content is 50 mass % or more and a water content is 2 mass % or less. ### Claim 10 (depends on 9) The method according to claim 9, wherein the other liquid preparation is a hair dye composition. ### Claim 11 (depends on 9) The method according to claim 9, wherein the other liquid preparation is a multiple-agent hair dye composition comprising a first agent comprising an alkaline agent and an oxidation dye precursor, and a second agent comprising an oxidizing agent. ### Claim 12 (depends on 9) The method according to claim 9, wherein the other liquid preparation is a two-agent hair dye composition consisting of a first agent comprising an alkaline agent and an oxidation dye precursor, and a second agent comprising an oxidizing agent. ### Claim 13 (depends on 1) The liquid hair dye composition according to claim 1, wherein the content (X) of the component (A) in the composition is from 5.5 mass % to 9.3 mass %. ### Claim 14 (depends on 1) The liquid hair dye composition according to claim 1, wherein the content (Y) of the component (B) in the composition is from 47.0 mass % to 98.5 mass %.