# US 2018/0021239 A1 · Copolymers for improving color intensity and washfastness of temporary hair dyes > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0021239 A1 - Document ID: US20180021239A1 - Status: Published application - Kind: A1 - Application number: 15/654,269 - Filed: 2017-07-19 - Published: 2018-01-25 - Earliest claimed: 2016-07-20 - Assignees: Sekisui Specialty Chemicals America, LLC - Applicants: Sekisui Specialty Chemicals America, LLC - Inventors: David B. Wurm - Web page: https://patentgrep.com/patent/US20180021239A1 ## CPC - A61K 8/817: {Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen; Compositions or derivatives of such polymers, e.g. vinylimidazol, vinylcaprolactame, allylamines (Polyquaternium 6)} - A61Q 5/065: {Preparations for temporary colouring the hair, e.g. direct dyes} - A61Q 5/10: Preparations for permanently dyeing the hair - A61K 2800/4324: in preparations for permanently dyeing the hair - 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 method for dyeing hair includes applying a polyvinyl amine copolymer solution to the hair; and applying a hair dye composition to the hair. A hair dye composition includes an aqueous base fluid; a polyvinyl amine copolymer; and an anionic or cationic hair dye. A method of making a hair dye composition includes mixing a polyvinyl amine copolymer and an anionic or cationic hair dye into an aqueous base fluid. ## Claims ### Claim 1 A method for dyeing hair, comprising: applying a polyvinyl amine copolymer solution to the hair; and applying a hair dye composition to the hair. ### Claim 2 (depends on 1) The method for dyeing hair of claim 1, wherein the polyvinyl amine copolymer solution is a component of the hair dye composition. ### Claim 3 (depends on 1) The method for dyeing hair of claim 1, wherein the polyvinyl amine copolymer solution is applied to the hair prior to the hair dye composition. ### Claim 4 (depends on 3) The method for dyeing hair of claim 3, wherein applying the polyvinyl amine copolymer solution to the hair comprises: spraying the polyvinyl amine copolymer solution onto the hair. ### Claim 5 (depends on 1) The method for dyeing hair of claim 1, wherein the weight average molecular weight of the polyvinyl amine copolymer is greater than or equal to about 5,000 g/mol, and less than or equal to about 2,000,000 g/mol. ### Claim 6 (depends on 1) The method for dyeing hair of claim 1, wherein the polyvinyl amine copolymer comprises from about 0.5 mol % to 20 mol % amine functional groups. ### Claim 7 (depends on 1) The method for dyeing hair of claim 1, wherein the polyvinyl amine copolymer solution has a pH value from about 6 to 12. ### Claim 8 (depends on 1) The method for dyeing hair of claim 1, wherein the amount of polyvinyl amine copolymer within the polyvinyl amine copolymer solution is from about 0.01% to 10% by weight of the solution. ### Claim 9 (depends on 1) The method for dyeing hair of claim 1, wherein the hair dye composition includes an anionic or a cationic hair dye. ### Claim 10 (depends on 9) The method for dyeing hair of claim 9, wherein the anionic or cationic hair dye is at least one selected from Direct Red 80, Basic Blue 3, acid violet 43, D&C Orange 5, disperse black 9, and Fast Green FCF. ### Claim 11 A hair dye composition, comprising: an aqueous base fluid; a polyvinyl amine copolymer; and an anionic or cationic hair dye. ### Claim 12 (depends on 11) The hair dye composition of claim 11, wherein the weight average molecular weight of the polyvinyl amine copolymer is greater than or equal to about 5,000 g/mol, and less than or equal to about 2,000,000 g/mol. ### Claim 13 (depends on 11) The hair dye composition of claim 11, wherein the polyvinyl amine copolymer comprises from about 0.5 mol % to 20 mol % amine functional groups. ### Claim 14 (depends on 11) The hair dye composition of claim 11, wherein the hair dye composition has a pH value from about 6 to 12. ### Claim 15 (depends on 11) The hair dye composition of claim 11, wherein the amount of polyvinyl amine copolymer within the polyvinyl amine copolymer solution is from about 0.01% to 10% by weight of the solution. ### Claim 16 (depends on 11) The hair dye composition of claim 11, wherein the anionic or cationic hair dye is at least one selected from Direct Red 80, Basic Blue 3, acid violet 43, D&C Orange 5, disperse black 9 and Fast Green FCF. ### Claim 17 (depends on 11) The hair dye composition of claim 11, further comprising: at least one additive selected from a conditioner, buffer, thickening agent, color enhancer, compatibilizer, emulsifier, and suspending agent. ### Claim 18 A method of making a hair dye composition, comprising: mixing a polyvinyl amine copolymer and an anionic or cationic hair dye into an aqueous base fluid. ### Claim 19 (depends on 18) The method of claim 18, wherein the polyvinyl amine copolymer comprises from about 0.5 mol % to 20 mol % amine functional groups. ### Claim 20 (depends on 18) The method of claim 18, wherein the hair dye composition has a pH value from about 6 to 12.