# US 2014/0155571 A1 · Polymerization method and product > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0155571 A1 - Document ID: US20140155571A1 - Status: Published application - Kind: A1 - Application number: 14/110,052 - Filed: 2012-03-27 - Published: 2014-06-05 - Earliest claimed: 2011-04-05 - Assignees: Auckland Uniservices Limited - Inventors: Sudip Ray; Allan James Easteal - Web page: https://patentgrep.com/patent/US20140155571A1 ## CPC - C08G 73/0266: {Polyanilines or derivatives thereof} - H01B 1/026: {Alloys based on copper} - H05K 3/105: {by conversion of non-conductive material on or in the support into conductive material, e.g. by using an energy beam} - C08G 73/0611: {with only one nitrogen atom in the ring, e.g. polypyrroles (polysuccinimides C08G73/1092)} - C08J 2379/02: Polyamines - C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS - H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K}) - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS - C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29) ## Abstract Methods of preparing a polyaniline homopolymer or copolymer comprising at least one carboxylic acid group, and homopolymers or copolymers arising therefrom, the methods comprising: preparing a solution of a polyaniline precursor having at least one aromatic amine group and at least one carboxylic acid group (eg. 2-aminobenzoic acid, 3-aminobenzoic acid or 4-aminobenzoic acid) in a solvent selected from aqueous methanesulfonic acid or aqueous ammonia and optionally one or more additional polyaniline precursors (such as aniline); and oxidatively polymerising the polyaniline precursor or precursors. ## Claims ### Claim 1 A method of preparing a polyaniline homopolymer or copolymer comprising at least one carboxylic acid group; the method comprising: preparing a solution of a polyaniline precursor having at least one aromatic amine group and at least one carboxylic acid group in a solvent selected from the group consisting of aqueous methanesulfonic acid and aqueous ammonia; and optionally one or more additional polyaniline precursors; and oxidatively polymerising the polyaniline precursor or precursors. ### Claim 2 (depends on 1) A method according to claim 1 for preparing a polyaniline homopolymer comprising carboxylic acid groups; the method comprising: preparing a solution of a polyaniline precursor having at least one aromatic amine group and at least one carboxylic acid group in aqueous methanesulfonic acid; and oxidatively polymerising the polyaniline precursor having at least one aromatic amine group and at least one carboxylic acid group. ### Claim 3 (depends on 1) A method according to claim 1 for preparing a polyaniline homopolymer comprising carboxylic acid groups; the method comprising: preparing a solution of a polyaniline precursor having at least one aromatic amine group and at least one carboxylic acid group in aqueous ammonia; and oxidatively polymerising the polyaniline precursor having at least one aromatic amine group and at least one carboxylic acid group. ### Claim 4 canceled ### Claim 5 (depends on 1) A method according to claim 1 for preparing a polyaniline copolymer comprising at least one carboxylic acid group; the method comprising: preparing a solution of a polyaniline precursor having at least one aromatic amine group and at least one carboxylic acid group in aqueous methanesulfonic acid and one or more additional polyaniline precursors; and oxidatively polymerising the polyaniline precursor having at least one aromatic amine group and at least one carboxylic acid group and the one or more additional polyaniline precursors. ### Claim 6 (depends on 1) A method according to claim 1 for preparing a polyaniline copolymer comprising at least one carboxylic acid group; the method comprising: preparing a solution of a polyaniline precursor having at least one aromatic amine group and at least one carboxylic acid group in aqueous ammonia and one or more additional polyaniline precursors; and oxidatively polymerising the polyaniline precursor having at least one aromatic amine group and at least one carboxylic acid group and the one or more additional polyaniline precursors. ### Claim 7 (depends on 1) A method according to claim 1 wherein the polyaniline precursor having at least one aromatic amine group and at least one carboxylic acid group is selected from 2-aminobenzoic acid, 3-aminobenzoic acid or 4-aminobenzoic acid. ### Claim 8 (depends on 1) A method according to claim 1 wherein the one or more additional polyaniline precursors comprises aniline. ### Claim 9 (depends on 1) A method according to claim 1 wherein the ratio of the polyaniline precursor having at least one aromatic amine group and at least one carboxylic acid group: the one or more additional polyaniline precursors is from 99:1 to 1:99. ### Claim 10 (depends on 1) A method according to claim 1 wherein the polyaniline precursor and methanesulfonic acid are present in a ratio of 2:1 to 1:2. ### Claim 11 (depends on 1) A method according to claim 1 wherein the polymerisation is carried out by APS. ### Claim 12 (depends on 1) A method according to claim 1 further including the step of collecting precipitated polyaniline by filtration. ### Claim 13 (depends on 12) A polyaniline random copolymer according to claim 12 comprising 4ABA and aniline monomers. ### Claim 14 (depends on 13) A polyaniline random copolymer according to claim 13 comprising 4ABA and aniline monomers in a ratio of between 3:1 and 1:3. ### Claim 15 (depends on 13) A polyaniline random copolymer according to claim 13 comprising 4ABA and aniline monomers in a ratio of 1:1. ### Claim 16 (depends on 12) A polyaniline random copolymer according to claim 12 comprising 2ABA and aniline monomers. ### Claim 17 (depends on 16) A polyaniline random copolymer according to claim 16 comprising 2ABA and aniline monomers in a ratio of between 3:1 and 1:3. ### Claim 18 (depends on 16) A polyaniline random copolymer according to claim 16 comprising 2ABA and aniline monomers in a ratio of 1:1. ### Claim 19 (depends on 12) A polyaniline random copolymer according to claim 12 comprising 3ABA and aniline monomers. ### Claim 20 (depends on 19) A polyaniline random copolymer according to claim 19 comprising 3ABA and aniline monomers in a ratio of between 3:1 and 1:3. ### Claim 21 (depends on 19) A polyaniline random copolymer according to claim 19 comprising 3ABA and aniline monomers in a ratio of 1:1. ### Claim 22 A polyaniline random copolymer comprising aniline monomers and a monomer selected from the group consisting of 2ABA, 3ABA and 4ABA.