# US 12,377,038 B2 · Cosmetic composition > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,377,038 B2 - Document ID: US12377038B2 - Status: Granted - Kind: B2 - Application number: 17/598,956 - Filed: 2020-03-26 - Published: 2022-06-16 - Granted: 2025-08-05 - Earliest claimed: 2019-04-02 - Assignees: Kao Corporation - Applicants: Kao Corporation - Inventors: Kaori Hayashi; Masayuki Narita; Naoya Kawakami; Tomokazu Iseki; Masato Oshika - Web page: https://patentgrep.com/patent/US12377038B2 ## CPC - A61K 8/8158: {Homopolymers or copolymers of amides or imides, e.g. (meth) acrylamide; Compositions of derivatives of such polymers} - A61K 8/34: Alcohols - A61K 8/8152: {Homopolymers or copolymers of esters, e.g. (meth)acrylic acid esters; Compositions of derivatives of such polymers} - A61Q 5/06: Preparations for styling the hair, e.g. by temporary shaping or colouring - A61K 2800/5422: nonionic - A61K 2800/5424: anionic - A61K 2800/5426: cationic - A61K 2800/5428: amphoteric or zwitterionic - A61K 2800/594: Mixtures of polymers - 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 The present invention relates to a cosmetic composition containing the following Components (A), (B), and (C): Component (A): a hydrophobic polymer which dissolves in ethanol at 25° C. in an amount of 1% by mass or more, and has a glass transition temperature Tg of 30° C. or higher, the polymer having the same electric charge as the following Component (B), or not having an electric charge; Component (B): a hydrophilic ionic polymer which dissolves in ethanol at 25° C. in an amount of 1% by mass or more; and Component (C): an ionic polymer which dissolves in ethanol at 25° C. in an amount of 1% by mass or more, the ionic polymer having a different kind of an electric charge to that of the Component (B). The cosmetic composition of the present invention can be suitably used in cosmetics for hair. ## Claims ### Claim 1 A cosmetic composition comprising the following Components (A), (B), and (C): Component (A): a hydrophobic polymer which dissolves in ethanol at 25° C. in an amount of 1% by mass or more, and has a glass transition temperature Tg of 50° C. or higher; Component (B): a hydrophilic ionic polymer which dissolves in ethanol at 25° C. in an amount of 1% by mass or more; and Component (C): an ionic polymer which dissolves in ethanol at 25° C. in an amount of 1% by mass or more; wherein: Component (A) is a cationic polymer or a nonionic polymer, Component (B) is a cationic polymer, and Component (C) is an anionic polymer; or Component (A) is an anionic polymer, Component (B) is an anionic polymer, and Component (C) is a cationic polymer; and wherein: at least one selected from the group consisting of Component (A), Component (B), and Component (C) comprises at least one selected from the group consisting of a constituting unit according to formula 1, a constituting unit according to formula 2, and a constituting unit according to formula 3: wherein: R1 is a hydrogen atom or a methyl group, and each of R2 and R3 is independently a hydrogen atom or a hydrocarbon group having 1 to 6 carbon atoms which may have a substituent, provided that at least one of R2 and R3 is a hydrocarbon group having 1 to 6 carbon atoms which may have a substituent, or alternatively, R2 and R3 are bound to each other to form a ring structure having 3 to 24 carbon atoms; wherein: R4 is a hydrogen atom or a methyl group; X1 is an oxygen atom or NH; when X1 is an oxygen atom: —Y1—X2 is a group selected from an alkyl group having 2 to 18 carbon atoms, an isobornyl group, —(CH2)p—N(R5)2, —(CH2)p—OR5, —C(CH3)2—N(R5)2, and —C(CH3)2—OR5, where p is 1 to 3, and R5 is a hydrogen atom or an alkyl group having 1 to 4 carbon atoms; or Y1 is a group containing 1 to 15 polyoxyalkylene groups having 2 or 3 carbon atoms, and X2 is a hydrogen atom, —CH3, or —C2H5; and when X1 is NH, Y1 is an alkylene group having 1 to 3 carbon atoms, X2 is —N(R5)2, where R5 is a hydrogen atom or an alkyl group having 1 to 4 carbon atoms; and wherein R6 is a hydrogen atom or a methyl group, and X3 is an aromatic group having 6 to 12 carbon atoms; an amount of amine or an amount of carboxylic acid in Component (A) is 1% to 20% by mass; a mass ratio of Component (A) to Component (B) is 0.8 to 1.5; and at least one selected from the group consisting of Component (A), Component (B), and Component (C) comprises at least one selected from the group consisting of an alkylamide group and an aminoalkylamide group. ### Claim 2 (depends on 1) The cosmetic composition according to claim 1, wherein a weight-average molecular weight of Component (A) is 5,000 to 500,000. ### Claim 3 (depends on 1) The cosmetic composition according to claim 1, wherein a proportion of a content of Component (C) to a total content of Components (A), (B), and (C) (Component (C)/(Components (A)+(B)+(C))) is 0.05% to 50% by mass. ### Claim 4 (depends on 1) The cosmetic composition according to claim 1, wherein an amount of amine or an amount of carboxylic acid in Component (B) is 1% to 60% by mass. ### Claim 5 (depends on 1) The cosmetic composition according to claim 1, comprising ethanol. ### Claim 6 (depends on 1) The cosmetic composition according to claim 1, formulated as a hair cosmetic. ### Claim 7 (depends on 1) A method of hair styling, comprising applying a cosmetic composition as defined in claim 1 to hair. ### Claim 8 (depends on 1) The cosmetic composition according to claim 1, wherein Component (A) comprises at least one selected from the group consisting of the constituting unit according to formula 1, the constituting unit according to formula 2, and the constituting unit according to formula 3. ### Claim 9 (depends on 1) The cosmetic composition according to claim 1, wherein Component (B) comprises at least one selected from the group consisting of the constituting unit according to formula 1, the constituting unit according to formula 2, and the constituting unit according to formula 3. ### Claim 10 (depends on 1) The cosmetic composition according to claim 1, wherein each of Component (A) and Component (B) independently comprises at least one selected from the group consisting of the constituting unit according to formula 1, the constituting unit according to formula 2, and the constituting unit according to formula 3. ### Claim 11 (depends on 1) The cosmetic composition according to claim 1, wherein Component (A) is a cationic polymer, Component (B) is a cationic polymer, and Component (C) is an anionic polymer. ### Claim 12 (depends on 1) The cosmetic composition according to claim 1, wherein Component (A) is a nonionic polymer, Component (B) is a cationic polymer, and Component (C) is an anionic polymer. ### Claim 13 (depends on 1) The cosmetic composition according to claim 1, wherein: Component (A) comprises a cationic polymer comprising constituting units derived from N-tert-butyl acrylamide, N,N-dimethylaminopropyl acrylamide, polyethylene glycol monomethacrylate, and dimethylacrylamide; Component (B) comprises a first cationic polymer comprising constituting units derived from N-tert-butyl acrylamide, N,N-dimethylaminopropyl acrylamide, polyethylene glycol monomethacrylate, and ethyl acrylate; and Component (B) comprises a second cationic polymer comprising constituting units derived from N-tert-butyl acrylamide, N,N-dimethylaminopropyl acrylamide, polyethylene glycol monomethacrylate, and dimethylacrylamide. ### Claim 14 (depends on 1) The cosmetic composition according to claim 1, wherein the composition exhibits a curl setting ratio of 32% or greater.