# US 2019/0169418 A1 · Water-in-oil polyacrylamide-based microemulsions and related methods > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0169418 A1 - Document ID: US20190169418A1 - Status: Published application - Kind: A1 - Application number: 16/201,457 - Filed: 2018-11-27 - Published: 2019-06-06 - Earliest claimed: 2009-06-19 - Assignees: Exacto, Inc. - Applicants: Exacto, Inc. - Inventors: Franklin E. Sexton; Ryan T. Strash; Todd J. O'Connell - Web page: https://patentgrep.com/patent/US20190169418A1 ## CPC - C08L 33/26: Homopolymers or copolymers of acrylamide or methacrylamide - A01N 25/04: Dispersions, {emulsions, suspoemulsions, suspension concentrates} or gels (foams A01N25/16) - C02F 1/56: Macromolecular compounds - C08K 3/20: Oxides; Hydroxides {(graphene oxides C08K3/042)} - C08K 5/06: Ethers; Acetals; Ketals; Ortho-esters - C08K 5/09: Carboxylic acids; Metal salts thereof; Anhydrides thereof - C08K 11/00: Use of ingredients of unknown constitution, e.g. undefined reaction products - C08L 53/00: Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers - C08L 71/02: Polyalkylene oxides - C08L 91/00: Compositions of oils, fats or waxes; Compositions of derivatives thereof - C08K 5/0058: {Biocides; (macromolecular substances as carriers for biocide material A01N25/10)} - C08K 5/101: of monocarboxylic acids - C08L 2201/52: Aqueous emulsion or latex, e.g. containing polymers of a glass transition temperature (Tg) below 20°C - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - 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 - C02F: TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE (separation in general B01D; special arrangements on waterborne vessels of installations for treating water, waste water or sewage, e.g. for producing fresh water, B63J; adding materials to water to prevent corrosion C23F; treating radioactively-contaminated liquids G21F9/04; regeneration of reactants for recirculation into processes, see the relevant places for the processes) - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) ## Abstract A water-in-oil microemulsion, including a polyacrylamide, a ratty acid, a surfactant, an oil continuous phase, and an aqueous discontinuous phase in the oil continuous phase. The fatty acid includes a tail oil fatty acid, oleic acid, or a combination of a tail oil fatty acid and oleic acid. The water-in-oil microemulsion contains 6 to 48 parts by weight of the polyacrylamide, 30 to 62 parts by weight of the fatty acid, and 20 to 44 parts by weight of the surfactant per 100 parts by weight of the polyacrylamide, the fatty acid, and the surfactant combined. ## Claims ### Claim 1 A water-in-oil microemulsion, comprising: a polyacrylamide; a fatty acid comprising a tall oil fatty acid, oleic acid, or a combination of a tall oil fatty acid and oleic acid; a surfactant; an oil continuous phase; an aqueous discontinuous phase in the oil continuous phase; and a pesticide and/or a fertilizer, wherein the water-in-oil microemulsion contains 6 to 48 parts by weight of the polyacrylamide, 30 to 62 parts by weight of the fatty acid, and 20 to 44 parts by weight of the surfactant per 100 parts by weight of the polyacrylamide, the fatty acid, and the surfactant combined. ### Claim 2 (depends on 1) The water-in-oil microemulsion of claim 1 wherein the oil continuous phase comprises a methylated soybean oil. ### Claim 3 (depends on 1) (Original) The water-in-oil microemulsion of claim 1 wherein the fatty acid is C8 to C30 fatty acid. ### Claim 4 (depends on 1) The water-in-oil microemulsion of claim 1 wherein the fatty acid comprises myristic acid, lauric acid, palmitic acid, stearic acid, oleic acid, linoleic acid, or a mixture thereof. ### Claim 5 (depends on 1) The water-in-oil microemulsion of claim 1, wherein the fatty acid comprises the tall oil fatty acid, and wherein the water-in-oil microemulsion contains 6 to 40 parts by weight of the polyacrylamide, 30 to 62 parts by weight of the tall oil fatty acid, and 20 to 44 parts by weight of the surfactant per 100 parts by weight of the polyacrylamide, the tall oil fatty acid, and the surfactant combined. ### Claim 6 (depends on 1) The water-in-oil microemulsion of claim 1, wherein the fatty acid comprises the tall oil fatty acid, and wherein the water-in-oil microemulsion contains 8 to 32 parts by weight of the polyacrylamide, 30 to 60 parts by weight of the tall oil fatty acid, and 24 to 43 parts by weight of the surfactant per 100 parts by weight of the polyacrylamide, the tall oil fatty acid, and the surfactant combined. ### Claim 7 (depends on 1) The water-in-oil microemulsion of claim 1, wherein the fatty acid comprises the oleic acid, and wherein the water-in-oil microemulsion contains 10 to 48 parts by weight of the polyacrylamide, 30 to 60 parts by weight of the oleic acid, and 20 to 39 parts by weight of the surfactant per 100 parts by weight of the polyacrylamide, the oleic acid, and the surfactant combined. ### Claim 8 (depends on 1) The water-in-oil microemulsion of claim 1, wherein the fatty acid comprises the oleic acid, and wherein the water-in-oil microemulsion contains 16 to 32 parts by weight of the polyacrylamide, 30 to 60 parts by weight of the oleic acid, and 24 to 38 parts by weight of the surfactant per 100 parts by weight of the polyacrylamide, the oleic acid, and the surfactant combined. ### Claim 9 (depends on 1) The water-in-oil microemulsion of claim 1, wherein the water-in-oil microemulsion is homogenously dispersible in water or water-based mixtures to form a diluted product substantially completely free of solid agglomerates of the polyacrylamide. ### Claim 10 (depends on 1) The water-in-oil microemulsion of claim 1, further comprising an ethylene oxide/propylene oxide (EO/PO) block copolymer. ### Claim 11 (depends on 1) The water-in-oil microemulsion of claim 1, wherein the surfactant is nonionic and has a hydrophilic-lipophilic balance of greater than 9.3. ### Claim 12 (depends on 1) The water-in-oil microemulsion of claim 1, wherein the surfactant comprises an ethoxylate. ### Claim 13 (depends on 12) The water-in-oil microemulsion of claim 12, wherein the ethoxylate comprises nonylphenol ethoxylate, an alcohol ethoxylate, a fatty acid ethoxylate, and combinations thereof. ### Claim 14 (depends on 1) The water-in-oil microemulsion of claim 1, wherein the polyacrylamide comprises a combination of a polyacrylamide homopolymer and a polyacrylamide copolymer. ### Claim 15 (depends on 1) The water-in-oil microemulsion of claim 1, wherein the polyacrylamide comprises an anionic polyacrylamide. ### Claim 16 (depends on 1) The water-in-oil microemulsion of claim 1, wherein the water-in-oil microemulsion has a total weight, and wherein the polyacrylamide constitutes up to about 15 percent by weight of the total weight. ### Claim 17 (depends on 1) The water-in-oil microemulsion of claim 1, wherein: the water-in-oil microemulsion has a total weight; the polyacrylamide constitutes up to about 15 percent by weight of the total weight; the fatty acid constitutes about 2 percent to about 5 percent by weight of the total weight; and the surfactant comprises a nonionic surfactant constituting about 9 to about 20 percent by weight of the total weight. ### Claim 18 (depends on 1) The water-in-oil microemulsion of claim 1, wherein the oil continuous phases comprises a methyl ester of cottonseed oil, canola oil, soybean oil, corn oil, palm kernel oil, coconut oil, or a combination thereof. ### Claim 19 (depends on 1) The water-in-oil microemulsion of claim 1, wherein the oil continuous phase comprises a paraffinic oil, a naturally occurring oil, a derivative of naturally occurring oils, or a combination thereof. ### Claim 20 (canceled) ### Claim 21 (canceled) ### Claim 22 (depends on 1) The water-in-oil microemulsion of claim 1, wherein the polyacrylamide comprises a nonionic polyacrylamide.