WO2012145177A1 - Spray drift reduction agents comprising low hydrophilic-lipophilic balance surfactants - Google Patents
Spray drift reduction agents comprising low hydrophilic-lipophilic balance surfactants Download PDFInfo
- Publication number
- WO2012145177A1 WO2012145177A1 PCT/US2012/032265 US2012032265W WO2012145177A1 WO 2012145177 A1 WO2012145177 A1 WO 2012145177A1 US 2012032265 W US2012032265 W US 2012032265W WO 2012145177 A1 WO2012145177 A1 WO 2012145177A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- spray
- surfactants
- surfactant
- lipophilic balance
- low hydrophilic
- Prior art date
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Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
- A01N25/24—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests containing ingredients to enhance the sticking of the active ingredients
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
- A01N25/30—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests characterised by the surfactants
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N57/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic phosphorus compounds
- A01N57/10—Biocides, pest repellants or attractants, or plant growth regulators containing organic phosphorus compounds having phosphorus-to-oxygen bonds or phosphorus-to-sulfur bonds
- A01N57/12—Biocides, pest repellants or attractants, or plant growth regulators containing organic phosphorus compounds having phosphorus-to-oxygen bonds or phosphorus-to-sulfur bonds containing acyclic or cycloaliphatic radicals
Definitions
- This invention relates generally to drift reduction agents for use in agricultural applications, but may also be applied in other applications where it is beneficial to reduce off-target deposition.
- Spray drift may be defined as the physical movement of airborne spray particles through the air at the time of application or soon thereafter to any off-target site.
- formulations with greater spray drift characteristics are typically unfavorable because less of the formulation interacts with the target site.
- drift reduction agents are typically added to the spray mixtures to reduce the amount of spray drift that occurs.
- DTT drift reduction technology
- TMA tank mix adjuvants
- PSD particle size distribution
- oil products that can be mineral or natural based, such as esterified seed oil. These oils produce either emulsions or invert emulsions that are thought to function by preventing small drops from forming during spray generation due to the emulsion phase present.
- Surfactants are typically added to many pesticidal spray solutions to increase bioefficacy. When a surfactant is added to a spray solution the surface tension and dynamic surface tensions may be reduced. It is thought that this reduction in surface tension makes it easier to generate smaller droplets. Adding a surfactant typically reduces the average particle size and more importantly generally increases the amount of fines generated during spraying. It is the finer particles that typically drift the most. Therefore, despite their other benefits, surfactants are not typically thought of as agents to reduce spray drift.
- HLB hydrophilic-lipophilic balance
- Surfactants are amphiphilic molecules that concentrate at the interface between two phases and modify the properties of that interface.
- a list of surfactants can be found in McCutcheon's Emulsifiers & Detergents or the Industrial Surfactants Handbook.
- the hydrophilic-lipophilic balance (HLB) of a surfactant is measured on an empirical scale developed by Griffin (W.C. Griffin, J. Cosmet. Chem., 1, 311, 1949). This scale ranges from 0 to 20, with 0 for a completely lipophilic molecule and 20 for a completely hydrophilic molecule.
- the function of surfactants can be generally described by then HLB number. Defoaming surfactants have an HLB range of 1-3.
- Water-in-oil emulsifiers have an HLB range of 3-6. Wetting agents have an HLB range of 7-9. Oil-in-water emulsifiers have an HLB range of 8-18. Detergents have an HLB range of 13-15. Solubilizers have an HLB range of 15-18.
- Surfactants with low HLB are not considered soluble in water. They are considered dispersible in water. They may form this dispersed phase spontaneously, without agitation. In other words, low HLB surfactants form a surfactant-rich dispersed phase when added to water. The presence of the dispersed surfactant-rich phase is thought to reduce the amount of fines formed during the spray atomization process. This novel DRT TMA chemistry is not believed to deleteriously broaden the particle size distribution as the polymeric DRT agents do.
- low HLB is defined as any surfactant HLB that will result in the surfactant's cloud point as measured in the targeted spray system being below the temperature at which the system is sprayed. In some embodiments this HLB is from about 7 to about 9. However, the actual HLB required will therefore be a function of the spray system components and their concentrations.
- a dispersed surfactant-rich phase will form, and this dispersed phase will function to reduce the fines generated even though the surface tension is reduced due to the presence of the dispersed surfactant phase.
- Higher HLB surfactants should also reduce fines if used above their cloud point. This would normally required elevated temperatures in the absence of formulation additives designed to reduce the cloud point.
- Examples of the low HLB surfactants of the current invention may include, but are not limited to, alcohol alkoxylates, alkylamine alkoxylates, polyetheramine alkoxylates, ethylene oxide/propylene oxide block polymers, phosphate esters, alkyl sulfates, alkyl ether sulfates, alkyl and alkylbenzene sulfonates, fatty acid esters, fatty oil alkoxylates, saccharide derivatives, sorbitan derivatives, alkyl phenol alkoxylates, arylphenol alkoxylates, sulphosuccinates and sulphosuccinamates and combinations thereof.
- the surfactants can be nonionic, anionic, cationic or zwitterionic.
- SURFONIC® surfactants that are commercially available from the Huntsman Corporation of The Woodlands, Texas.
- Embodiments of the present invention also disclose a pesticidal composition to reduce spray drift that comprises one or more active ingredients and one or more low hydrophilic-lipophilic balance surfactants.
- the one or more active ingredients may be herbicides, insecticides, fungicides or combinations thereof. Such herbicides may be water soluble herbicides or other herbicides such as 2,4-D esters.
- the one or more active ingredients may be glyphosate or one or more salts or esters thereof.
- Embodiments of the present invention disclose a method of reducing spray drift by providing a composition for spraying that comprises a pesticide and a low hydrophilic- lipophilic balance surfactant and spraying the composition.
- Further embodiments include a method of controlling weeds by contacting such a pesticidal composition to the weed or soil; a method of controlling insects by applying such a pesticidal composition to insects, soils or crops; and a method of controlling fungi by applying such a pesticidal composition to the fungi, crops or soils.
- Embodiments of the present invention disclose a method of reducing spray drift comprising providing a composition for spraying that comprises a surfactant and spraying the spray mixture above the surfactant's cloud point as measured in the spray mixture.
- Embodiments of the present invention disclose a spray composition comprising a blend of two or more surfactants wherein the blend has a low hydrophilic-lipophilic balance.
- a method is disclosed of producing a spray drift reduction composition by blending a low HLB surfactant with a second surfactant (such as higher HLB surfactants) to produce a blend with a low hydrophilic-lipophilic balance.
- a second surfactant such as higher HLB surfactants
- a user may add low HLB surfactants to a spray tank mixture.
- the pesticidal composition would have a blend of two or more surfactants where the effective surfactant blend has a combined low HLB level.
- the primary application of this technology will be to reduce drift during the spraying of pesticide formulations. However, the technology may also be applicable in other areas such as polyurethane or polyurea spraying, paint spraying, or other spraying systems where it is beneficial to reduce off-target deposition.
- Table 1 shows particle size data.
- the spray particle size distribution and percent fines can be measured using ASTM Standard Test Method E2798: "Characterization of Performance of Pesticide Spray Drift Reduction Adjuvants for Ground Application.” Sample solutions where sprayed through a nozzle (XR8004VS) at 40 psig.
- Example 1 the pesticide composition, contains 1.7v/v% POWERMAX® herbicide (commercially available from The Monsanto Company of St. Louis, Missouri. POWERMAX is a registered mark of The Monsanto Company) diluted into 342 ppm hardness water.
- EO average 3 moles ethylene oxide
- Example 3 is the same base composition as Example 1 except it also contains 0.5% SURFONIC® LI 2-3 surfactant which is commercially available from the Huntsman Corporation of The Woodlands, Texas.
- Example 4 is the same base composition as Example 1 except it also contains 0.5% SURFONIC® TDA-3B surfactant which is commercially available from Huntsman Corporation of The Woodlands, Texas.
- Example 5 is the same base composition as Example 1 except it also contains 0.5% TERMIX® 5910 tank mix adjuvant which is commercially available from Huntsman Corporation of The Woodlands, Texas. Table 1: Particle Size Data
- Table 1 shows several low HLB surfactants that reduce the amount of fines while also reducing both dynamic (10 mSec) and static (I s) surface tension.
- Table 1 also shows that the low HLB surfactant SURFONIC TDA-3B reduced %fines ⁇ 105 microns from 16.0 v/v% with no DRT adjuvant to a value of only 8.7 %. This is almost a 50% reduction in fines, while dynamic surface tension dropped from 51.3 to 48.8 mN/m and static surface tension dropped from 42.9 to 26.9 mN/m. Normally a reduction in tension would result in an increase in the volume of fines generated during spraying.
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- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Dentistry (AREA)
- Plant Pathology (AREA)
- Engineering & Computer Science (AREA)
- Pest Control & Pesticides (AREA)
- Agronomy & Crop Science (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Environmental Sciences (AREA)
- Toxicology (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Catching Or Destruction (AREA)
Abstract
Description
Claims
Priority Applications (10)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2012245869A AU2012245869B2 (en) | 2011-04-20 | 2012-04-05 | Spray drift reduction agents comprising low hydrophilic-lipophilic balance surfactants |
CN201280013357.2A CN103442559B (en) | 2011-04-20 | 2012-04-05 | Spray drift reduction agents comprising low hydrophilic-lipophilic balance surfactants |
ES12773871T ES2756799T3 (en) | 2011-04-20 | 2012-04-05 | Use of spray drift reduction agents comprising low hydrophilic-lipophilic balance surfactants |
MX2013011447A MX352462B (en) | 2011-04-20 | 2012-04-05 | Spray drift reduction agents comprising low hydrophilic-lipophili c balance surfactants. |
US13/696,826 US20130150241A1 (en) | 2011-04-20 | 2012-04-05 | Spray drift reduction agents comprising low hydrophilic-lipophilic balance surfactants |
BR112013024083A BR112013024083A8 (en) | 2011-04-20 | 2012-04-05 | spray deviation reducing agent, pesticidal composition, method for reducing spray deviation, spray composition, and method for producing a spray deviation reducing composition |
EP12773871.4A EP2699089B1 (en) | 2011-04-20 | 2012-04-05 | Use of spray drift reduction agents comprising low hydrophilic-lipophilic balance surfactants |
JP2014506438A JP6227524B2 (en) | 2011-04-20 | 2012-04-05 | Spray drift reducing agent comprising low hydrophilic-lipophilic balance surfactant |
CA2830518A CA2830518C (en) | 2011-04-20 | 2012-04-05 | Spray drift reduction agents comprising low hydrophilic-lipophilic balance surfactants |
US14/987,126 US10123532B2 (en) | 2011-04-20 | 2016-01-04 | Spray drift reduction agents comprising low hydrophilic-lipophilic balance surfactants |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201161477251P | 2011-04-20 | 2011-04-20 | |
US61/477,251 | 2011-04-20 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/696,826 A-371-Of-International US20130150241A1 (en) | 2011-04-20 | 2012-04-05 | Spray drift reduction agents comprising low hydrophilic-lipophilic balance surfactants |
US14/987,126 Division US10123532B2 (en) | 2011-04-20 | 2016-01-04 | Spray drift reduction agents comprising low hydrophilic-lipophilic balance surfactants |
Publications (1)
Publication Number | Publication Date |
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WO2012145177A1 true WO2012145177A1 (en) | 2012-10-26 |
Family
ID=47041879
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2012/032265 WO2012145177A1 (en) | 2011-04-20 | 2012-04-05 | Spray drift reduction agents comprising low hydrophilic-lipophilic balance surfactants |
Country Status (11)
Country | Link |
---|---|
US (2) | US20130150241A1 (en) |
EP (1) | EP2699089B1 (en) |
JP (2) | JP6227524B2 (en) |
CN (1) | CN103442559B (en) |
AR (1) | AR086105A1 (en) |
AU (1) | AU2012245869B2 (en) |
BR (1) | BR112013024083A8 (en) |
CA (1) | CA2830518C (en) |
ES (1) | ES2756799T3 (en) |
MX (1) | MX352462B (en) |
WO (1) | WO2012145177A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014040119A1 (en) * | 2012-09-11 | 2014-03-20 | Vitel Australia Pty Ltd | Spray drift adjuvant formulation and method of use |
WO2016055344A1 (en) * | 2014-10-08 | 2016-04-14 | Evonik Degussa Gmbh | Use of hydrophobic, self-emulsifying polyglycerol esters as adjuvants and anti-spray drift agent |
EP2906039A4 (en) * | 2012-10-12 | 2016-04-20 | Dow Agrosciences Llc | Alkylbenzene sulfonate surfactants for controlling herbicide spray drift |
WO2017001346A1 (en) | 2015-06-29 | 2017-01-05 | Lamberti Spa | Method for reducing spray drift |
US10888091B2 (en) | 2013-08-14 | 2021-01-12 | Croda, Inc. | Adjuvancy combination |
US20210251218A1 (en) * | 2018-06-14 | 2021-08-19 | Université de Liège | Bio-herbicide based on essential oil |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU2012245869B2 (en) * | 2011-04-20 | 2015-12-03 | Indorama Ventures Oxides Llc | Spray drift reduction agents comprising low hydrophilic-lipophilic balance surfactants |
AU2012308738B2 (en) | 2011-09-12 | 2016-09-08 | Specialty Operations France | Agricultural pesticide compositions |
CN112741102A (en) * | 2020-12-30 | 2021-05-04 | 浙江新安化工集团股份有限公司 | Fine glufosinate-ammonium herbicide |
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-
2012
- 2012-04-05 AU AU2012245869A patent/AU2012245869B2/en active Active
- 2012-04-05 WO PCT/US2012/032265 patent/WO2012145177A1/en active Application Filing
- 2012-04-05 US US13/696,826 patent/US20130150241A1/en not_active Abandoned
- 2012-04-05 JP JP2014506438A patent/JP6227524B2/en active Active
- 2012-04-05 CA CA2830518A patent/CA2830518C/en active Active
- 2012-04-05 EP EP12773871.4A patent/EP2699089B1/en active Active
- 2012-04-05 BR BR112013024083A patent/BR112013024083A8/en not_active IP Right Cessation
- 2012-04-05 MX MX2013011447A patent/MX352462B/en active IP Right Grant
- 2012-04-05 CN CN201280013357.2A patent/CN103442559B/en active Active
- 2012-04-05 ES ES12773871T patent/ES2756799T3/en active Active
- 2012-04-18 AR ARP120101321A patent/AR086105A1/en active IP Right Grant
-
2016
- 2016-01-04 US US14/987,126 patent/US10123532B2/en active Active
- 2016-09-06 JP JP2016173434A patent/JP6230671B2/en active Active
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014040119A1 (en) * | 2012-09-11 | 2014-03-20 | Vitel Australia Pty Ltd | Spray drift adjuvant formulation and method of use |
EP2906039A4 (en) * | 2012-10-12 | 2016-04-20 | Dow Agrosciences Llc | Alkylbenzene sulfonate surfactants for controlling herbicide spray drift |
US10888091B2 (en) | 2013-08-14 | 2021-01-12 | Croda, Inc. | Adjuvancy combination |
WO2016055344A1 (en) * | 2014-10-08 | 2016-04-14 | Evonik Degussa Gmbh | Use of hydrophobic, self-emulsifying polyglycerol esters as adjuvants and anti-spray drift agent |
US10390530B2 (en) | 2014-10-08 | 2019-08-27 | Evonik Degussa Gmbh | Use of hydrophobic, self-emulsifying polyglycerol esters as adjuvants and anti-spray-drift agents |
WO2017001346A1 (en) | 2015-06-29 | 2017-01-05 | Lamberti Spa | Method for reducing spray drift |
US20210251218A1 (en) * | 2018-06-14 | 2021-08-19 | Université de Liège | Bio-herbicide based on essential oil |
Also Published As
Publication number | Publication date |
---|---|
AU2012245869B2 (en) | 2015-12-03 |
CA2830518A1 (en) | 2012-10-26 |
EP2699089B1 (en) | 2019-09-04 |
US20160219873A1 (en) | 2016-08-04 |
JP6227524B2 (en) | 2017-11-08 |
MX2013011447A (en) | 2013-10-17 |
JP6230671B2 (en) | 2017-11-15 |
CA2830518C (en) | 2019-07-16 |
AU2012245869A1 (en) | 2013-09-19 |
CN103442559B (en) | 2017-03-22 |
CN103442559A (en) | 2013-12-11 |
BR112013024083A8 (en) | 2018-01-16 |
JP2017036286A (en) | 2017-02-16 |
AR086105A1 (en) | 2013-11-20 |
EP2699089A1 (en) | 2014-02-26 |
US10123532B2 (en) | 2018-11-13 |
JP2014512383A (en) | 2014-05-22 |
EP2699089A4 (en) | 2014-09-03 |
ES2756799T3 (en) | 2020-04-27 |
BR112013024083A2 (en) | 2016-08-09 |
MX352462B (en) | 2017-11-27 |
US20130150241A1 (en) | 2013-06-13 |
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