# US 2013/0157862 A1 · Herbicidal picolinic acid salt composition > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0157862 A1 - Document ID: US20130157862A1 - Status: Published application - Kind: A1 - Application number: 13/703,509 - Filed: 2011-06-17 - Published: 2013-06-20 - Earliest claimed: 2010-06-21 - Assignees: Nufarm Australia Limited - Inventors: Aristos Panayi; Chad Richard Ord Sayer - Web page: https://patentgrep.com/patent/US20130157862A1 ## CPC - A01N 43/40: six-membered rings - A01N 37/10: Aromatic or araliphatic carboxylic acids, or thio analogues thereof; Derivatives thereof - A01N 37/38: having at least one oxygen or sulfur atom attached to an aromatic ring system - A01N 37/40: having at least one carboxylic group or a thio analogue, or a derivative thereof, and one oxygen or sulfur atom attached to the same aromatic ring system - A01N 57/20: containing acyclic or cycloaliphatic radicals - A01N: PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF (preservation of food or foodstuff A23); BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES (preparations for medical, dental or toiletry purposes which kill or prevent the growth or proliferation of unwanted organisms A61K); PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS ## Abstract A herbicidal concentrate composition comprising a mixture of the monomethylamine and dimethylamine salts of at least one picolinic acid herbicide of formula (Ia): wherein X2 is selected from hydrogen and amino. ## Claims ### Claim 1 A herbicidal concentrate composition comprising a mixture of the monomethylamine (MMA) and dimethylamine (DMA) salts of at least one picolinic acid herbicide of formula wherein X2 is selected from hydrogen and amino and mixtures of two or more thereof. ### Claim 2 (depends on 1) A herbicidal composition according to claim 1 wherein the herbicide is clopyralid. ### Claim 3 (depends on 1) A herbicidal composition according to claim 1 wherein the mixture of salts is present in aqueous solution of concentration of at least 300 g/L, based on herbicidal acid equivalent. ### Claim 4 (depends on 1) A herbicidal composition according to claim 1 wherein the mixture of salts is present in aqueous solution of concentration of at least 500 g/L, based on herbicidal acid equivalent. ### Claim 5 (depends on 1) A herbicidal composition according to claim 1 wherein the mixture of salts is present in aqueous solution of concentration of at least 700 g/L, based on herbicidal acid equivalent. ### Claim 6 (depends on 5) A herbicidal composition according to claim 5 wherein the mole ratio is in the range of 70%-90% DMA to 30%-10% MMA. ### Claim 7 A composition consisting essentially of: i) clopyralid in the form of the monomethylamine salt and clopyralid in the form of the dimethylamine salt wherein the molar ratio of monomethylamine to dimethylamine is preferably in the range of from 10:90 to 90:10; ii) water; iii) no more than 10% by weight based on the total weight of the composition of additives selected from surfactants and compatibility agents; and iv) wherein the concentration of picolinic acid salt herbicide in the aqueous composition is at least 500 g/L based on herbicidal acid equivalent. ### Claim 8 (depends on 7) A composition according to claim 7 wherein the ratio is from 70%-90% DMA to 30%-10% MMA. ### Claim 9 (depends on 8) A composition according to claim 8 wherein the concentration of clopyralid salt herbicide is at least 500 g/L, based on herbicidal acid equivalent. ### Claim 10 (depends on 9) A composition according to claim 9 wherein the concentration of clopyralid salt herbicide is at least 700 g/L, based on herbicidal acid equivalent. ### Claim 11 (depends on 1) A composition according to claim 1 wherein the composition comprises casein in an amount of from 0.01 to 5% by weight of the concentrate composition. ### Claim 12 A process for preparing a composition described in any one of the previous claims comprising providing at least one herbicidal picolinic acid selected from aminopyralid and clopyralid and reacting the herbicide with methylamine and dimethylamine in a molar ratio of 10:90 to 90:10 to provide a mixture of picolinic acid methylamine and dimethylamine salts. ### Claim 13 (depends on 12) A process according to claim 12 wherein the herbicidal picolinic acid is clopyralid and the ratio is in the range of 20:80 to 80:20. ### Claim 14 (depends on 12) A process according to claim 12 wherein the ratio is in the range of 70%-90% DMA to 30%-10% MMA. ### Claim 15 (depends on 1) A process for preparing an aqueous liquid herbicide composition comprising dissolving a clopyralid monomethylamine salt and clopyralid dimethylamine salt in an aqueous liquid to provide a composition as defined according to claim 1. ### Claim 16 (depends on 2) A method of controlling plant growth comprising diluting a concentrate composition according to claim 2 comprising at least 300 g/L based on herbicidal acid equivalent of a mixture of MMA and DMA salts of clopyralid with water and applying the diluted composition to plants or to soil in which growth of plants are to be controlled. ### Claim 17 (depends on 16) A method according to claim 16 wherein the composition is diluted with water to provide a concentration of clopyralid salt in the range of from 0.01 g/L to 300 g/L (based on acid equivalent) and applied to the plants or soil.