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
  • A01N57/18—Biocides, pest repellants or attractants, or plant growth regulators containing organic phosphorus compounds having phosphorus-to-carbon bonds
  • A01N57/20—Biocides, pest repellants or attractants, or plant growth regulators containing organic phosphorus compounds having phosphorus-to-carbon bonds containing acyclic or cycloaliphatic radicals

Definitions

• the present invention relates to spray drift reductants for agrochemical formulations, particularly for use in spray drift reduction, and more especially for use as spray drift reductants and a method of reducing spray drift in agrochemical formulations comprising said compounds with one or more agrochemical actives and/or nutrients.
• liquid compositions typically include one or more compounds intended to improve one or more properties of the liquid composition, such as for example, storage stability, ease of handling, and/or pesticide efficacy against target organisms.
• each spray mixture evaluated is different and is composed of a formulated pesticide active ingredient and more frequently several actives appearing in different formulations.
• Each pesticide formulation would be expected to exert an independent effect on droplet size and spray quality when applied separately since they contain independent arrays of formulants, many of which are surface active or contribute to the concentration of dispersed phases in the spray mixture.
• the research is clear in the importance of each of these materials to the final properties of the mixture and also to the droplet size distribution and spray quality produced by the mixture when applied through a series of nozzles and under differing spray conditions.
• the research cited clearly describes the capacity of a technology applied to reduce pesticide drift to be more accurately defined using a combination of the contribution from spray system design and operating parameters with the contribution from an appropriately representative admixture of diluted materials in the model spray mixtures.
• This mixture should in all cases include a suitable pesticide or pesticides along with a representative adjuvant system.
• the parties assessing the US EPA Drift Reduction Technology certification testing protocol need to consider and include this relevant research in the final adopted methodology.
• NIC agricultural non-ionic
• Additional benefits suitable for adding value include improvements in limiting or reducing the formation of driftable fine droplets under select spray conditions.
• the present invention seeks to provide the use of compounds in agrochemical compositions in combination with one or more agrochemical active and/or nutrient, where the compounds may provide comparable (i.e. by not degrading the spray pattern) or improved properties with regard to spray drift compared to formulations used without spray drift reductants, or in comparison to existing spray drift reductants.
• the present invention also seeks to provide the use of agrochemical concentrates and dilute formulations comprising said spray drift reductants. Additionally, the present invention seeks to provide a method of reducing spray drift, and a method of treating vegetation for pests or to provide nutrients.
• a sprayable agrochemical formulation comprising;
• a concentrate formulation suitable for making a sprayable agrochemical formulation of the first aspect comprising a spray drift reductant of a fatty ester of a C 3 to C 8 polyol, or an oligomer thereof having from 2 to 5 repeat units.
• a sprayable agrochemical formulation comprising;
• a fatty ester of a C 3 to C 8 polyol, or an oligomer thereof having from 2 to 5 repeat units as spray drift reductant in an agrochemical formulation comprising at least one agrochemical active and/or nutrient, and optionally a clathrate compound.
• an agrochemical formulation of the first or third aspects and/or a diluted concentrate formulation of the second aspect.
• a method of treating vegetation to control pests and/or to provide nutrients comprising applying a formulation of the first or third aspects, and/or a diluted concentrate formulation of the second aspect, either to said vegetation or to the immediate environment of said vegetation.
• fatty ester of a C 3 to C 8 polyol or polyol oligomer comprising agrochemical formulations, and in particular use of these compounds, provides for comparable (i.e. by not degrading the spray pattern), or improved drift control during spraying of said formulation.
• use of the fatty ester of a C 3 to C 8 polyol or oligomer provides for better spray patterns and gives fewer driftable particles.
• the number refers to the total number of carbon atoms present in the substituent group, including any present in any branched groups. Additionally, when describing the number of carbon atoms in, for example fatty acids, this refers to the total number of carbon atoms including the one at the carboxylic acid, and any present in any branch groups.
• drift refers to off-target movement of droplets of an agrochemical composition that is applied to a target pest or environment for the pest or to provide nutrients.
• Spray applied compositions typically exhibit decreasing tendency to drift with decreasing relative amount, typically expressed as a volume percentage of total spray applied droplet volume, of small size spray droplets, that is, spray droplets having a droplet size below a given value, typically a droplet size of less than 150 micrometers.
• Spray drift of pesticides in particular can have undesirable consequences such as, for example, unintended contact of phytotoxic pesticides with non-pest pest plants like crops or ornamental plants along with damage to such non-pest plants.
• spray drift reductant refers to compounds which when added to a sprayable agrochemical formulation may provide a reduction in observed spray drift when compared to the formulation not comprising said agent.
• the fatty ester of a C 3 to C 8 polyol, or oligomer thereof, may have a general structure (I):
• the fatty ester of a C 3 to C 8 polyol, or oligomer thereof having from 2 to 5 repeat units, is preferably non-ionic.
• polyol is well known in the art, and refers to an alcohol comprising more than one hydroxyl group.
• active hydrogen refers to the hydrogen atoms present as part of the hydroxyl groups of the C 3 to C 8 polyol P. Therefore, it will be understood that the integer m, being the number of active hydrogens in said C 3 to C 8 polyol, is equivalent to the number of hydroxyl groups present for each C 3 to C 8 polyol.
• polyol residue refers to an organic radical derived from polyol by removal of m active hydrogen atoms, each hydrogen atom being from one of the hydroxyl groups present.
• the polyol residue is a C 3 to C 8 polyol residue, i.e. formed from a C 3 to C 8 polyol. More preferably, a C 3 to C 7 polyol residue, particularly C 3 to C 6 polyol residues.
• the polyol residue may also be a residue of an oligomer of a C 3 to C 8 polyol, said oligomer having from 2 to 5 repeat units of the monomer polyol.
• said oligomers have from 2 to 4 repeat units. More preferably, from 2 to 3 repeat units.
• the oligomer may be a homogeneous oligomer formed from identical monomer polyol units, or may be heterogeneous being formed from a number of different C 3 to C 8 polyol monomer units.
• Particularly suitable polyol oligomers may be selected from diglycerol, triglycerol, tetraglycerol, dierythritol, trierythritol, tetraerythritol, di-1,3-propanediol, tri-1,3-propanediol, di(trimethylolpropane), or tri(trimethylolpropane).
• said oligomer is selected from diglycerol, triglycerol, tetraglycerol, di(trimethylolpropane), or tri(trimethylolpropane).
• said oligomer is selected from diglycerol, triglycerol, di(trimethylolpropane), or tri(trimethylolpropane). Most preferably, said oligomer may be diglycerol or di(trimethylolpropane).
• the polyol may be linear, branched, partially cyclic, or cyclic.
• the index m is a measure of the alcohol functionality of the polyol, and the fatty ester —C(O)R 2 will replace some or all of the active hydrogen atoms (dependent on the reaction conditions).
• esterification at a particular site may be restricted or prevented by steric hindrance.
• the polyols used in the present invention have a value of m active hydrogen atoms in the range from 2 to 7.
• the value of m is in the range from 2 to 6. More preferably, in the range from 3 to 5.
• the preferred numbers of hydroxyl groups present on the polyol will be the same as listed for the preferred numbers of m active hydrogen atoms.
• the polyol residue may be homogeneous in that it comprises only one specific polyol residue and is formed from one specific polyol.
• the polyol residue starting material may be heterogeneous in that it comprises a mixture of a number of different polyols have different values of m selected from those listed above, and therefore the polyol residue formed therefrom may be heterogeneous.
• the polyol may be selected from diols, triols, tetrols, pentols, hexols, heptols, or octols.
• the polyol may be selected from triols, tetrols, pentols, hexols, or heptols. More preferably, the polyol may be selected from triols, tetrols, or hexols.
• Suitable specific polyols may be selected from ethylene glycol, isosorbide, 1,3-propanediol, propylene glycol, trimethylolpropane, trimethylolethane, glycerol, triglycerol, erythritol, threitol, pentaerythritol, sorbitan, arabitol, xylitol, ribitol, fucitol, mannitol, sorbitol, sucrose, maltose, galactitol, iditol, inositol, volemitol, isomalt, maltitol, or lactitol.
• polyols obtainable from natural sources may be preferred.
• sugar alcohols may be used to form the polyol residue.
• saccharide derived polyols having from 4 to 7 hydroxyl groups.
• preferred sugars and sugar alcohols may include monosaccharides and disaccharides having from 4 to 7 hydroxyl groups. Residues of monosaccharide, more preferably of glucose, fructose or sorbitol, and particularly of sorbitol or sorbitan, may be preferred as polyols obtained from natural sources.
• polyol residues are those wherein m represents a value of 3, 4, or 6, and where said residues are C 3 to C 6 polyol residues.
• the polyol residue is formed from glycerol, sorbitol, sorbitan, or oligomers thereof.
• the C 1 to C 28 hydrocarbyl may preferably be selected from a C 1 to C 28 alkyl or a C 1 to C 28 alkenyl.
• alkyl refers to saturated hydrocarbon radicals being straight chain, branched, or combinations thereof, containing from 1 to 28 carbon atoms.
• the alkyls each contain from 5 to 26 carbon atoms. More preferably, 10 to 24 carbon atoms. Most preferably, 16 to 22 carbon atoms.
• alkyl radicals may be independently selected from methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, nonadecyl, eicosyl, henicosyl, docosyl, tricosyl, tetracosyl, pentacosyl, hexacosyl, heptacosyl, octacosyl, or branched variants thereof.
• the alkyl radicals may preferably be selected from dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, nonadecyl, eicosyl, or branched variants thereof.
• alkenyl refers to hydrocarbon radicals having at least one or a plurality, preferably no more than four, double bonds.
• the alkenyl radicals may be straight chain, or branched moieties, or combinations thereof.
• the alkenyl radicals may each contain from 2 to 28 carbon atoms.
• the alkenyls each contain from 5 to 26 carbon atoms. More preferably, 10 to 24 carbon atoms. Most preferably, 16 to 22 carbon atoms.
• alkenyl radicals may be independently selected from ethyl, propenyl, butenyl, pentenyl, hexenyl, heptenyl, octenyl, nonenyl, decenyl, undecenyl, dodecenyl, tridecenyl, tetradecenyl, pentadecenyl, hexadecenyl, heptadecenyl, octadecenyl, nonadecenyl, eicosenenyl henicosenyl, docosenyl, tricosenyl, tetracosenyl, pentacosenyl, hexacosenyl, heptacosenyl, octacosenyl, or branched variants thereof.
• the alkenyl radicals may preferably be selected from dodecenyl, tridecenyl, tetradecenyl, pentadecenyl, hexadecenyl, heptadecenyl, octadecenyl, nonadecenyl, eicosenyl, or branched variants thereof.
• At least one of the R 1 groups present in the spray drift reductant represents an alkanoyl group represented by —C(O)R 2 in which R 2 will represent a C 8 to C 28 hydrocarbyl.
• Said alkanoyl group may preferably be a residue of a fatty acid.
• the C 8 to C 28 hydrocarbyl is preferably selected from a C 8 to C 28 alkyl or C 8 to C 28 alkenyl. More preferably, a C 8 to C 14 alkyl or C 12 to C 24 alkenyl. Most preferably, a C 8 to C 12 alkyl or C 16 to C 20 alkenyl.
• Said C 8 to C 28 alkyl or C 8 to C 28 alkenyls may be selected from the alkyl radicals and alkenyl radicals as listed herein having 8 to 28 carbon atoms. Said C 8 to C 28 alkyl or C 8 to C 28 alkenyls may also be selected such that the resulting ester is in a liquid state at room temperature and pressure. The chain lengths may be selected so that the viscosity of the spray drift reductant is kept low and within desired values and the resulting is not a waxy solid.
• a fatty acid refers to the moiety that is the resulting product of the fatty acid in a particular reaction scheme or subsequent formulation or chemical product, regardless of whether the moiety is actually obtained from the specified chemical species.
• a ‘fatty acid residue’ thereby refers to the moiety which results when a fatty acid participates in a particular reaction (i.e. the residue is a fatty alkanoyl group RC(O)—).
• the fatty acid residue is therefore ‘derived’ from the respective fatty acid. It is understood that this moiety can be obtained by a reaction with a species other than the specified fatty acid per se, for example, by a reaction with an unsaturated fatty acid chloride, ester, or anhydride.
• the fatty acids used in the present invention are preferably selected from C 10 to C 30 fatty acids, more preferably C 12 to C 24 fatty acids, particularly C 14 to C 22 fatty acids, further preferably C 16 to C 22 fatty acids. Especially C 18 fatty acids may be preferred.
• the fatty acids may be selected from linear or branched fatty acids.
• the fatty acids may be selected from saturated or unsaturated fatty acids.
• unsaturated fatty acids may be selected from unsaturated fatty acids comprising at least one unsaturated carbon-carbon double bond. Particularly preferred are unsaturated fatty acids having in the range from 1 to 3 carbon-carbon double bonds. Most preferred are mono-unsaturated or di-unsaturated fatty acids residues.
• the carbon-carbon double bond(s) of the fatty chain may be present either in a cis or a trans configuration.
• the fatty acids residues used are derived from linear mono-unsaturated or di-unsaturated fatty acids.
• the preferred fatty acids may also comprise some tri-unsaturated fatty acids as it has been found that addition may improve cold liquid stability properties.
• Iodine values are understood to represent the average amount of unsaturation of fats or oils, and is expressed in terms of the number of centigrams of iodine absorbed per gram of sample (% iodine absorbed).
• said fatty acids may be selected such that the iodine value is greater than 70.
• said iodine value is greater than 90. More preferably, said iodine value is greater than 100. Most preferably, said iodine value is greater than 110.
• Suitable saturated fatty acids may be selected from caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, arachidic acid, behenic acid, or lignoceric acid.
• Preferred saturated fatty acids may be selected from caprylic acid, capric acid, lauric acid, or myristic acid.
• Suitable unsaturated fatty acids may be selected from myristoleic acid, palmitoleic acid, sapienic acid, oleic acid, elaidic acid, vaccenic acid, linoleic acid, linoelaidic acid, arachidonic acid, eicosapentaenoic acid, erucic acid, or docosahexaenoic acid.
• Preferred unsaturated fatty acids may be selected from oleic acid, linoleic acid, linolenic acid, palmitoleic acid, or elaidic acid. Particularly preferred unsaturated fatty acids may be oleic acid, linoleic acid, and mixtures thereof.
• the fatty acids may be unsaturated fatty acid mixtures obtained from natural fats and oils, e.g. canola oil, sunflower oil, soybean oil, olive oil, cotton seed oil, grape seed oil, peanut oil, rapeseed oil, safflower oil, cottonseed oil, or tall oil.
• canola oil, safflower oil, soybean oil, or tall oil e.g. canola oil, sunflower oil, soybean oil, olive oil, cotton seed oil, grape seed oil, peanut oil, rapeseed oil, safflower oil, cottonseed oil, or tall oil.
• canola oil, safflower oil, soybean oil, or tall oil e.g. canola oil, sunflower oil, soybean oil, olive oil, cotton seed oil, grape seed oil, peanut oil, rapeseed oil, safflower oil, cottonseed oil, or tall oil.
• the fatty acid used may be purified prior to use in the present invention. Purification may be undertaken to raise the levels of desired fatty acid chains and reduce the level of undesired fatty acid chains in order to modify the iodine values, titre values, or pour points.
• Particularly suitable fatty esters of C 3 to C 8 polyols or oligomers thereof include glycerol, diglycerol, or sorbitan esters of oleic acid, elaidic acid, linoleic acid, or erucic acid
• the fatty esters of C 3 to C 8 polyols or oligomers of the present invention may be esterified at any of the m active hydrogen sites on the polyol thereby providing mono ester or poly esterified polyols. Said polyols may therefore be partially or fully esterified. Preferably, said polyols are partial esters which remain insoluble in water.
• the fatty esters of C 3 to C 8 polyols or oligomers of the present invention may be esterified at between 25 to 75% of the m active hydrogen sites on the polyol. Preferably, 35 to 65% of the m active hydrogen sites. More preferably, 40 to 60% of the m active hydrogen sites. Most preferably, around 50% of the m active hydrogen sites.
• the fatty esters of C 3 to C 8 polyol used in the present invention preferably comprise a mixture of mono-, di-, tri-, and optionally tetra-, esters.
• the concentration of monoesters is suitably at least 20%, preferably at least 25%, more preferably at least 30%, particularly at least 35%, and especially at least 40% by weight based upon the total concentration of fatty esters of C 3 to C 8 polyol.
• the concentration of the combination of monoesters and diesters is suitably at least 50%, preferably at least 65%, more preferably at least 75%, particularly at least 80%, and especially at least 85% by weight based upon the total concentration of fatty esters of C 3 to C 8 polyol.
• the concentration of tri- and tetra-esters is suitably not more than 50%, preferably not more than 35%, more preferably not more than 25%, particularly not more than 20%, and especially not more than 15% by weight based upon the total concentration of fatty esters of C 3 to C 8 polyol.
• the preferred amounts of mono-, di-, tri-, and optionally tetra-, esters may preferably be for monomeric polyol esters.
• the fatty esters of C 3 to C 8 polyol or oligomers thereof preferably have a HLB value, as calculated by Griffin's method, of less than 10, more preferably less than 8, and most preferably less than 7.
• the fatty esters of C 3 to C 8 polyol component suitably has a HLB value in the range from 1 to 8, preferably 2 to 6, more preferably 3 to 5.
• the HLB of the spray drift reductant may be in the range 4 to 5 where the fatty esters of C 3 to C 8 polyol or oligomer thereof is based on C 6 sugar alcohols. In an alternative embodiment where the fatty esters of C 3 to C 8 polyol or oligomer thereof is based on C 3 polyols, the HLB may be less than 4.
• fatty esters of C 3 to C 8 polyol or oligomers thereof may be selected from sorbitan mono-oleate, glycerol mono-oleate, sorbitan sesquioleate, sorbitan di-oleate, sorbitan tri-oleate, glycerol ester of tall oil or diglycerol ester of tall oil, glycerol ester of canola oil or diglycerol ester of canola oil, glycerol ester of safflower oil or diglycerol ester of safflower oil, glycerol ester of soy oil or diglycerol ester of soy oil, di-glycerol oleate, tri-glycerol oleate, di-glycerol isostearate, or tri-glycerol isostearate.
• the spray drift reductants may preferably be liquid at room temperature and pressure. Most preferably, the spray drift reductants are liquid and remain as liquid and free from suspended solids in the sprayable agrochemical formulation at temperatures down to 0° C. for at least 24 hours.
• the spray drift reductants may also have low or no aquatic toxicity, and be acceptable for food use.
• the reductants may be selected from those which avoid classification as hazardous under the Globally Harmonized System (GHS), that are acceptable for organic production as defined by the USDA National Organic Program, and/or that are acceptable for use as additives to food as defined by the US Food and Drug Administration, the UN WHO Joint Expert Committee on Food Additives (JECFA) or related EU food safety regulations.
• GGS Globally Harmonized System
• JECFA UN WHO Joint Expert Committee on Food Additives
• the spray drift reductant may preferably be non-self-emulsifiable. Said reductant may therefore need to be emulsified, and said emulsification may be achieved by mechanical action, such as homogenisation, or by addition of an emulsifier compound.
• clathrate refers to a chemical substance which comprises a lattice that traps or contains the relevant molecules, in this case fatty esters of a C 3 to C 8 polyol or oligomer thereof having from 2 to 5 repeat units. Said spray drift reductants, when comprised in said lattice will be understood as being in a ‘clathrated’ form.
• Clathrates which may be used for the present invention include in particular urea clathrates or thiourea clathrates. Preferably, urea clathrates are used.
• the spray drift reductants which are comprised in the clathrated are the fatty esters of a C 3 to C 8 polyol or oligomer thereof having from 2 to 5 repeat units as already defined herein.
• the spray drift reductant when including a clathrate in the agrochemical formulation, may be selected from mono and diglycerol esters comprised within urea clathrates.
• Clathrates may be preferably included in the agrochemical formulation when including nutrients, especially where the agrochemical formulation is in the form of dry, water soluble, or water dispersible solid.
• the spray drift reductant of the present invention may be obtainable by esterifying a C 3 to C 8 polyol.
• the fatty esters of C 3 to C 8 polyol may be obtained by esterifying a C 3 to C 8 polyol by any suitable method.
• the respective polyglyceride (for example triglyceride) may be trans-esterified to provide a mixture of mono and poly esterified polyol.
• the method may be adapted to provide higher concentrations of more preferred components.
• the oligomers may be first formed by oligomerising the respective polyol monomer units, and the oligomer may then be esterified.
• the step of esterification of the polyol or polyol oligomer may be undertaken by techniques well known in the art, for example by reacting the polyol or oligomer with the required amounts of fatty acid source under acidic or basic conditions.
• the polyol or oligomer therefore undergoes an esterification reaction with fatty acid.
• the spray drift reductant of the present invention may be obtained by directly esterifying a polyol or oligomer.
• the method of forming the C 3 to C 8 polyol or oligomer esters may comprise using biologically derived fatty acids and polyols or oligomers. It can be seen that the components may be derived from biological materials, but the spray drift reductant itself is formed by a chemical synthesis. This may result in greater reproducibility and more consistent product with greater purity. Synthesising the reductants in this way allows for improved control of the process, and therefore improved control of the resultant properties such as viscosity and freezing point.
• the polyol or oligomer may be partially or fully esterified. At least one of the active hydrogens m of the polyol or oligomer is esterified. Preferably, at least 1 or 2 of the active hydrogens m of the polyol or oligomer are esterified.
• R 1 groups on average in the range from 1 to 2.5 of the R 1 groups comprise an alkanoyl group represented by —C(O)R 2 .
• the clathrate comprising a spray drift reductant may be used when preparing dry, solid agrochemical formulations, preferably when preparing a nutrient comprising formulation.
• the method of forming the clathrate comprising the reductant includes the steps of heating, if necessary melting, the reductant to an appropriate temperature, then adding in urea to form a mixture.
• the clathrate compound is added at an amount of above 40 wt. % of the mixture, more preferably around 50 wt. %.
• the mixture is then recrystallised by either i) pouring in to slabs and producing particles by grinding, ii) pastilating it, or iii) spraying of the clathrate to give fine granular solid.
• the molecular weight (weight average) of the spray drift reductant is preferably in the range from 200 to 2200, more preferably 250 to 1900, particularly 330 to 1500, further preferably, 350 to 1270, and especially 370 to 950.
• the agrochemical formulation according to the present invention may also contain components, such as surfactant materials which form part of the emulsifier system.
• Said surfactants may include surfactant dispersants.
• Suitable surfactants include relatively hydrophilic surfactants, e.g. having a HLB value of greater than 10, preferably greater than 12.
• the surfactants may alternatively be relatively hydrophobic surfactants which are not fatty esters of C 3 to C 8 polyol or oligomers thereof having 2-5 repeat units, and may have HLB values of less than 10, preferably less than 8.
• Relatively hydrophilic surfactants include alkoxylate surfactants with an average in the range from about 10 to about 100 alkylene oxide, particularly ethylene oxide, residues; and relatively hydrophobic surfactants include alkoxylate surfactants preferably with an average in the range from about 3 to about 10 alkylene oxide, particularly ethylene oxide, residues.
• Suitable surfactants may be selected from those which may be emulsifying, readily miscible, non-gelling, readily dilutable, and/or dispersible.
• Suitable surfactants may include polysorbates, for example poly alkoxylated sugar alcohol esters. Suitable examples of such surfactants may include typically non-ionic polymeric ether surfactants. The most commonly used examples are polysorbates such as polysorbate 20 and polysorbate 80 (sold under the Tween brand).
• a surfactant comprising non-ionic alkoxylate, preferably an alkoxylated fatty alcohol, may be included.
• the oxyalkylene groups (AO) may be selected from groups of the formula —(C y H 2y O)— where y is an integer selected from 2, 3, or 4. Preferably, y is 2 or 3.
• the oxyalkylene group AO may be selected from oxyethylene, oxypropylene, oxybutylene, or oxytetramethylene.
• the oxyalkylene group is selected from oxyethylene (EO) and/or oxypropylene (PO).
• oxyalkylene chain is homopolymeric
• homopolymers of ethylene oxide or propylene oxide are preferred. More preferably, homopolymers of ethylene oxide are particularly preferred.
• the oxyalkylene groups may be the same or may be different along said oxyalkylene chain.
• the oxyalkylene chain may be a block or random copolymer of differing oxyalkylene groups.
• block or random copolymer of differing oxyalkylene groups in the alkoxylated fatty alcohol may be particularly preferred.
• the number of oxyalkylene groups in each oxyalkylene chain (i.e. the value of the each parameter x) will be in the range from 1 to 30. Preferably, in the range from 2 to 25. More preferably, in the range from 3 to 10. Further preferably, in the range from 4 to 7.
• the C 4 to C 30 hydrocarbyl may preferably be selected from a C 4 to C 30 alkyl or a C 4 to C 30 alkenyl.
• alkyl refers to saturated hydrocarbon radicals being straight chain, branched, or combinations thereof, containing from 4 to 30 carbon atoms.
• the alkyls each contain from 6 to 24 carbon atoms. More preferably, 8 to 22 carbon atoms. Most preferably, 10 to 20 carbon atoms.
• alkyl radicals may be independently selected from methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, nonadecyl, eicosyl, henicosyl, docosyl, tricosyl, tetracosyl, pentacosyl, hexacosyl, heptacosyl, octacosyl, or branched variants thereof.
• the alkyl radicals may preferably be selected from dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, nonadecyl, eicosyl, or branched variants thereof.
• alkenyl refers to hydrocarbon radicals having at least one or a plurality, preferably no more than four, double bonds.
• the alkenyl radicals may be straight chain, or branched moieties, or combinations thereof.
• the alkenyl radicals may each contain from 4 to 30 carbon atoms. Preferably, the alkenyls each contain from 5 to 26 carbon atoms. More preferably, 10 to 24 carbon atoms. Most preferably, 16 to 22 carbon atoms.
• alkenyl radicals may be independently selected from ethyl, propenyl, butenyl, pentenyl, hexenyl, heptenyl, octenyl, nonenyl, decenyl, undecenyl, dodecenyl, tridecenyl, tetradecenyl, pentadecenyl, hexadecenyl, heptadecenyl, octadecenyl, nonadecenyl, eicosenenyl henicosenyl, docosenyl, tricosenyl, tetracosenyl, pentacosenyl, hexacosenyl, heptacosenyl, octacosenyl, or branched variants thereof.
• the alkyl radicals may preferably be selected from dodecenyl, tridecenyl, tetradecenyl, pentadecenyl, hexadecenyl, heptadecenyl, octadecenyl, nonadecenyl, eicosenyl, or branched variants thereof.
• R 3 may be derived from, and the residue of a fatty alcohol.
• R 3 is derived from a fatty alcohol
• R 3 represents an alkoxy group (R—O—) being a residue of a fatty alcohol.
• a fatty alcohol refers to the moiety that is the resulting product of the fatty alcohol in a particular reaction scheme or subsequent formulation or chemical product, regardless of whether the moiety is actually obtained from the specified chemical species.
• a ‘fatty alcohol residue’ thereby refers to the moiety which results when a fatty alcohol participates in a particular reaction (i.e. the residue is a fatty alkoxy group R—O).
• the fatty alcohol residue is therefore ‘derived’ from the respective fatty alcohol. It is understood that this moiety can be obtained by a reaction with a species other than the specified fatty alcohol per se, for example, by a reaction with an unsaturated fatty alcohol chloride, ester, or anhydride.
• the fatty alcohols may preferably be selected from C 4 to C 30 fatty alcohols, more preferably C 6 to C 24 fatty alcohols, particularly C 10 to C 22 fatty alcohols, further preferably C 10 to C 16 fatty alcohols, and especially C 12 fatty alcohols.
• the fatty alcohols may be selected from linear or branched fatty alcohols.
• the fatty alcohols may be selected from saturated or unsaturated fatty alcohols.
• unsaturated fatty alcohols may be selected from unsaturated fatty alcohols comprising at least one unsaturated carbon-carbon double bond. Particularly preferred are unsaturated fatty alcohols having in the range from 1 to 3 carbon-carbon double bonds. Most preferred are mono-unsaturated fatty alcohols residues.
• the carbon-carbon double bond of the fatty chain may be present either in a cis or a trans configuration.
• the fatty alcohols residues used are derived from linear saturated fatty alcohols.
• Suitable saturated and unsaturated fatty alcohols in particular may be selected from capryl alcohol pelargonic alcohol, capric alcohol, undecyl alcohol, lauryl alcohol, tridecyl alcohol, myristyl alcohol, pentadecyl alcohol, cetyl alcohol, palmitoleyl alcohol, heptadecyl alcohol, stearyl alcohol, nonadecyl alcohol, arachidyl alcohol, heneicosyl alcohol, or behenyl alcohol, oleyl alcohol, elaidyl alcohol, linoleyl alcohol, linolenyl alcohol, or erucyl alcohol.
• unsaturated and saturated C 10 to C 16 fatty alcohols may be preferred.
• the fatty alcohols may preferably be selected from capric alcohol, lauryl alcohol, or myristyl alcohol.
• Suitable non-ionic alkoxylates having utility in the context of the present invention may be selected from lauryl alcohol (4 EO) ethoxylate, lauryl alcohol (5 EO) ethoxylate, lauryl alcohol (6 EO) ethoxylate, oleyl (3 EO) ethoxylate, oleyl (5 EO) ethoxylate, or oleyl (10 EO) ethoxylate.
• the non-ionic alkoxylates may in particular be selected from those which are miscible with the spray drift reductant.
• Agrochemically active compounds in particular systemic insecticides and fungicides, or nutrients require a formulation which allows the active compounds or nutrients to be taken up by the plant/the target organisms.
• agrochemical formulation refers to compositions including an active or nutrient agrochemical, and is intended to include all forms of compositions, including concentrates and spray formulations. If not specifically stated, the agrochemical formulation of the present invention may be in the form of a concentrate, a diluted concentrate, or a sprayable formulation.
• the spray drift reductant may be combined with other components in order to form an agrochemical formulation comprising at least one agrochemical active and/or nutrient.
• agrochemical active compounds may be formulated as an emulsifiable concentrate (EC), emulsion concentrate (EW), suspension concentrate (SC), soluble liquid (SL), as an oil-based suspension concentrate (OD), and/or suspoemulsions (SE).
• EC emulsifiable concentrate
• EW emulsion concentrate
• SC suspension concentrate
• SL soluble liquid
• OD oil-based suspension concentrate
• SE suspoemulsions
• the active compound in an EC formulation and in an SL formulation, may be present in dissolved form, whereas in an OD, SC, or SE formulations the active compound may be present as a solid or emulsified liquid.
• the spray drift reductant of the present invention will particularly find use in a SC, OD, or SE formulation.
• the agrochemical formulation of the present invention may be in the form of a concentrate, a diluted concentrate, or a sprayable formulation.
• Agrochemical concentrates are agrochemical compositions, which may be aqueous or non-aqueous, and which are designed to be diluted with water (or a water based liquid) to form the corresponding spray formulations.
• Said compositions include those in liquid form (such as solutions, emulsions, or dispersions) and in solid form (especially in water dispersible solid form) such as granules or powders.
• Spray formulations are aqueous agrochemical formulations including all the components which it is desired to apply to the plants or their environment.
• Spray formulations can be made up by simple dilution of concentrates containing desired components (other than water), or by mixing of the individual components, or a combination of diluting a concentrate and adding further individual components or mixtures of components.
• end use mixing is carried out in the tank from which the formulation is sprayed, or alternatively in a holding tank for filling the spray tank.
• Such mixing and mixtures are typically termed tank mixing and tank mixtures.
• a spray drift reductant may therefore be incorporated into the formulation of the agrochemical active or nutrient compound (in-can formulation) or be added after dilution of the concentrated formulation of the spray liquor (tank-mix).
• in-can formulation agrochemical active or nutrient compound
• tank-mix a concentrated formulation of the spray liquor
• spray drift reductants it is advantageous to incorporate the spray drift reductants into the formulation. This also avoids the unnecessary use of additional packaging material for the tank-mix products.
• concentrates thus formed may comprise typically up to 95 wt. % agrochemical actives or nutrients.
• Said concentrates may be diluted for use resulting in a dilute composition having an agrochemical active or nutrient concentration of about 0.5 wt. % to about 1 wt. %.
• a dilute composition for example, a spray formulation, where a spray application rate may be from 10 to 500 l.ha ⁇ 1
• the agrochemical active or nutrient concentration may be in the range from about 0.001 wt. % to about 1 wt. % of the total formulation as sprayed.
• the spray drift reductant of the formula (I) will typically be used either in an amount proportional to the amount of the active agrochemical or nutrient in the formulation, or more preferably in an amount proportional to the volume of spray solution to be applied.
• the proportion of spray drift reductant will depend on the solubility of the components in the liquid carrier.
• the concentration of spray drift reductant in such a concentrate will be from 1 wt. % to 99 wt. %.
• the concentration of spray drift reductant in such a concentrate will be from 1 wt. % to 99 wt. %.
• the concentration of spray drift reductant in such a concentrate will be from 1 wt. % to 99 wt. %.
• the concentration of spray drift reductant in such a concentrate will be from 1 wt. % to 99 wt. %.
• the concentration of spray drift reductant in such a concentrate will be from 1 wt. % to 99 wt. %.
• the spray drift reductant Upon dilution to form, for example, a spray formulation, the spray drift reductant will typically be present at a concentration of from 0.01 wt. % to 2 wt. %, more usually from 0.03 wt. % to 0.5 wt. % of the spray formulation. Further preferably, from 0.12 wt. % to 0.4 wt. % of the spray formulation.
• concentrates solid or liquid
• the concentrates will typically be diluted to form the spray formulations.
• the dilution may be with from 1 to 10,000, particularly 10 to 1,000, times the total weight of the concentrate of water to form the spray formulation.
• the agrochemical active is present in the aqueous end use formulation as solid particles, most usually it will be present as particles mainly of active agrochemical.
• the active agrochemical can be supported on a solid carrier e.g. silica or diatomaceous earth, which can be solid support, filler or diluent material as mentioned above.
• the liquid will typically be an oil.
• the oil may be or include a mineral oil, including aliphatic (paraffin) mineral oils and aromatic mineral or synthetic oils, such as those sold under the trade name Solvesso; an optionally hydrogenated vegetable oil, such as an optionally hydrogenated cotton seed oil, linseed oil, mustard oil, neem oil, niger seed oil, oiticica oil, olive oil, palm oil, palm kernel oil, peanut oil, perilla oil, poppy seed oil, rape seed oil, safflower oil, sesame oil, or soybean oil; an ester oil (a synthetic ester oil), especially a C 16 ester of a C 8 to C 22 fatty acid, especially a C 12 to C 18 fatty acid, or a mixture of esters, such as methyl laurate, 2-ethylhexyl laurate, heptadecanoate, heptadecenoate, heptadeca
• the spray formulations will typically have a pH within the range from moderately acidic (e.g. about 3) to moderately alkaline (e.g. about 10), and particular near neutral (e.g. about 5 to 8). More concentrated formulations will have similar degrees of acidity/alkalinity, but as they may be largely non-aqueous, pH is not necessarily an appropriate measure of this.
• the agrochemical formulation may include solvents (other than water) such as monopropylene glycol, oils which can be vegetable or mineral oils such as spray oils (oils included in spray formulations as non-surfactant adjuvants), associated with the reductant.
• solvents may be included as a solvent for the spray drift reductant and/or as a humectant, e.g. especially propylene glycol.
• humectant e.g. especially propylene glycol.
• solvents will typically be included in an amount of from 5 wt. % to 500 wt. %, desirably 10 wt. % to 100 wt. %, by weight of the spray drift reductant.
• Such combinations can also include salts such as ammonium chloride and/or sodium benzoate, and/or urea especially as gel inhibition aids.
• the agrochemical formulation may also include;
• compositions and formulations of and used in this invention may be included in the compositions and formulations of and used in this invention.
• examples include linear alcohol alkoxylates (as may be present in materials made for use in this invention derived from linear alcohols in the starting materials); alkylpolysaccharides (more properly called alkyl oligosaccharides); fatty amine ethoxylates e.g.
• coconut alkyl amine 2EO coconut alkyl amine 2EO
• sorbitan and sorbitol ethoxylate derivatives such as those sold under the trade names Atlox and Tween by Croda Europe Limited
• derivatives of alk(en)yl succinic anhydride in particular those described in PCT applications WO 94/00508 and WO 96/16930.
• the agrochemical formulations may also include other components including:
• Suitable agrochemical actives for use in the formulations according to the invention are all agrochemically active compounds, preferably those which are solid at room temperature. It is envisaged that the spray drift reductant of the present invention would have broad applicability to all types of agrochemical actives.
• Agrochemical actives refer to biocides which, in the context of the present invention, are plant protection agents, more particular chemical substances capable of killing different forms of living organisms used in fields such as medicine, agriculture, forestry, and mosquito control. Also counted under the group of biocides are so-called plant growth regulators.
• Biocides for use in agrochemical formulations of the present invention are typically divided into two sub-groups:
• biocides selected from insecticides, fungicides, or herbicides may be particularly preferred.
• pesticide will be understood to refer to any substance or mixture of substances intended for preventing, destroying, repelling, or mitigating any pest.
• a pesticide may be a chemical substance or biological agent (such as a virus or bacteria) used against pests including insects, plant pathogens, weeds, mollusks, birds, mammals, fish, nematodes (roundworms) and microbes that compete with humans for food, destroy property, spread disease or are a nuisance.
• pesticides suitable for the agrochemical compositions according to the present invention are given.
• a fungicide is a chemical control of fungi.
• Fungicides are chemical compounds used to prevent the spread of fungi in gardens and crops.
• Fungicides are also used to fight fungal infections.
• Fungicides can either be contact or systemic.
• a contact fungicide kills fungi when sprayed on its surface.
• a systemic fungicide has to be absorbed by the fungus before the fungus dies.
• fungicides encompass the following species: (3-ethoxypropyl)mercury bromide, 2-methoxyethylmercury chloride, 2-phenylphenol, 8-hydroxyquinoline sulphate, 8-phenylmercuri oxyquinoline, acibenzolar, acylamino acid fungicides, acypetacs, aldimorph, aliphatic nitrogen fungicides, allyl alcohol, amide fungicides, ampropylfos, anilazine, anilide fungicides, antibiotic fungicides, aromatic fungicides, aureofungin, azaconazole, azithiram, azoxystrobin, barium polysulphide, benalaxyl-M, benodanil, benomyl, benquinox, bentaluron, benthiavalicarb, benzalkonium chloride, benzamacril, benzamide fungicides,
• herbicide is a pesticide used to kill unwanted plants. Selective herbicides kill specific targets while leaving the desired crop relatively unharmed. Some of these act by interfering with the growth of the weed and are often based on plant hormones. Herbicides used to clear waste ground are non-selective and kill all plant material with which they come into contact. Herbicides are widely used in agriculture and in landscape turf management. They are applied in total vegetation control (TVC) programs for maintenance of highways and railroads. Smaller quantities are used in forestry, pasture systems, and management of areas set aside as wildlife habitat.
• TVC total vegetation control
• Suitable herbicides may be selected from the group comprising: aryloxycarboxylic acid e.g. MCPA, aryloxyphenoxypropionates e.g. clodinafop, cyclohexanedione oximes e.g. sethoxydim, hydroxybenzonitriles e.g. bromoxynil, sulphonylureas e.g. nicosulphuron, triazolopyrimidines e.g. penoxsulam, triketiones e.g.
• aryloxycarboxylic acid e.g. MCPA
• aryloxyphenoxypropionates e.g. clodinafop
• cyclohexanedione oximes e.g. sethoxydim
• hydroxybenzonitriles e.g. bromoxynil
• sulphonylureas e.g. nicos
• mesotriones triazine herbicides such as metribuzin, hexaxinone, or atrazine; sulphonylurea herbicides such as chlorsulfuron; uracils such as lenacil, bromacil, or terbacil; urea herbicides such as linuron, diuron, siduron, or neburon; acetanilide herbicides such as alachlor, or metolachlor; thiocarbamate herbicides such as benthiocarb, triallate; oxadiazolone herbicides such as oxadiazon; isoxazolidone herbicides, phenoxyacetic acids; diphenyl ether herbicides such as fluazifop, acifluorfen, bifenox, or oxyfluorfen; dinitro aniline herbicides such as trifluralin; organophosphonate herbicides such as glufosinate salts and esters and glypho
• herbicides may be selected from 2,4-dichlorophenoxyacetic acid (2,4-D), atrazine, dicamba as benzoic acid, glyphosate, glufosinate, imazapic as imidazolinone, metolachlor as chloroacetamide, picloram, clopyralid, and triclopyr as pyridinecarboxylic acids or synthetic auxins, their respective water soluble salts and esters, and mixtures thereof.
• 2,4-D 2,4-dichlorophenoxyacetic acid
• atrazine dicamba as benzoic acid
• glyphosate glyphosate
• glufosinate glufosinate
• imazapic as imidazolinone
• metolachlor as chloroacetamide
• picloram clopyralid
• triclopyr as pyridinecarboxylic acids or synthetic auxins, their respective water soluble salts and esters, and mixtures thereof.
• An insecticide is a pesticide used against insects in all developmental forms, and include ovicides and larvicides used against the eggs and larvae of insects. Insecticides are used in agriculture, medicine, industry and the household.
• Suitable insecticides may include those selected from: chlorinated insecticides such as, for example, Camphechlor, DDT, Hexachloro-cyclohexane, gamma-Hexachlorocyclohexane, Methoxychlor, Pentachlorophenol, TDE, Aldrin, Chlordane, Chlordecone, Dieldrin, Endosulphan, Endrin, Heptachlor, Mirex and their mixtures; organophosphorous compounds such as, for example, Acephate, Azinphos-methyl, Bensulide, Chlorethoxyfos, Chlorpyrifos, Chlorpyriphos-methyl, Diazinon, Dichlorvos (DDVP), Dicrotophos, Dimethoate, Disulphoton, Ethoprop, Fenamiphos, Fenitrothion, Fenthion, Fosthiazate, Malathion, Methamidophos, Methidathion, Methyl-parathion, Mevinpho
• Miticides are pesticides that kill mites. Antibiotic miticides, carbamate miticides, formamidine miticides, mite growth regulators, organochlorine, permethrin and organophosphate miticides all belong to this category.
• Molluscicides are pesticides used to control mollusks, such as moths, slugs and snails. These substances include metaldehyde, methiocarb and aluminium sulphate.
• a nematicide is a type of chemical pesticide used to kill parasitic nematodes (a phylum of worm).
• active compounds from the classes of the azole fungicides (azaconazole, bitertanol, bromuconazole, cyproconazole, diclobutrazole, difenoconazole, diniconazole, diniconazole-M, epoxiconazole, etaconazole, fenarimol, fenbuconazole, fluquinconazole, flurprimidol, flusilazole, flutriafol, furconazole, furconazole-cis, hexaconazole, imazalil, imazalil sulphate, imibenconazole, ipconazole, metconazole, myclobutanil, nuarimol, oxpoconazole, paclobutrazole, penconazole, pefurazoate, prochloraz, propiconazole, prothioconazole, pyrifenox, simeconazole,
• the spray drift reductant may be used in formulation comprising nutrients in addition to, or as an alternative to, pesticide actives.
• the nutrient is typically in a dry form.
• the spray drift reductant may preferably also be in a dry form comprised in a clathrate, with the clathrate admixed with the nutrient.
• Nutrients refer to chemical elements and compounds which are desired or necessary to promote or improve plant growth. Suitable nutrients generally are described as macronutrients or micronutrients. Micronutrients typically refer to trace metals or trace elements, and are often applied in lower doses. Micronutrients typically refer to those comprising nitrogen, phosphorus, and potassium, and include fertilisers such as ammonium sulphate, and water conditioning agents.
• Suitable nutrients for use in the formulations according to the invention are all nutrient compounds, preferably those which are solid at room temperature. It is envisaged that the spray drift reductant of the present invention would have broad applicability to all types of nutrients.
• the spray drift reductants of the present invention when comprised in a clathrate may find particular use with fertilisers, more preferably fertilisers in solid anhydrous form.
• Suitable micronutrients include trace elements selected from zinc, boron, chlorine, copper, iron, molybdenum, and manganese.
• the micronutrients may be in a soluble form or included as insoluble solids, and may be salts or chelated.
• Suitable macro nutrients include fertilisers and other nitrogen, phosphorus, potassium, calcium, magnesium, sulphur containing compounds, and water conditioning agents.
• Suitable fertilisers include inorganic fertilisers that provide nutrients such as nitrogen, phosphorus, potassium or sulphur. Examples of such fertilisers include:
• Fertilisers may be included in diluted formulations at relatively low concentrations or as more concentrated solutions, which at very high levels may include solid fertiliser as well as solution.
• inclusion of the nutrient would be dependent upon the specific nutrient, and that micronutrients would typically be included at lower concentrations whilst macronutrients would typically be included at higher concentrations.
• the proportion of nutrient in the total concentrate formulation is typically from 5 wt. % to 40 wt. %, more usually, 10 wt. % to 35 wt. %, particularly 15 wt. % to 30, % by weight based on the concentrate.
• the invention further includes a method of treating or providing nutrients to plants using spray formulations including at least one dispersed phase agrochemical and a spray drift reductant of the first aspect.
• the agrochemical may be one or more phytoactives, for example growth regulators and/or herbicides, and/or pesticides, for example insecticides, fungicides or acaricides, or may be a nutrient.
• the invention further includes methods of use including:
• Spray drift reductants refer to materials that reduce the amount of undesired small spray droplets (driftable fines) and/or the amount of undesired large droplets, both in a commercially significant and desirable manner. It is understood that the modification of spray drift characteristics is achieved through the modification of the size and size distribution of droplets in the spray.
• Spray applied formulations typically exhibit decreasing tendency to drift when a decreased amount of small size spray droplets are formed, that is spray droplets having a droplet size below typically 150 ⁇ m. This amount of small driftable droplets may be expressed as a volume percentage of the droplet volume of the total spray applied. There is a desire to reduce the amount of spray drift when compared to formulations either comprising alternative non-ionic surfactants or no spray drift reductant. Spray drift of pesticides can have undesirable consequences which include unintended contact of phytotoxic pesticides with non-pest pest plants causing damage to these non-pest plants, such as crops or ornamental plants.
• the present invention will be understood to improve spray droplet characteristics with none or little degradation of spray pattern.
• Droplet size and spray measurement values may be readily determined by laser light scattering, image analysis, or phase doppler laser measurement. Droplet size measurements as used in the present application are with reference to measurement by laser light scattering using a Sympatec Helos Vario KF laser sizing system. The spray plume was directed down and traversed across the instrument laser beam; data was averaged over the spray plume.
• the spray drift reductant decreases the volume of driftable fine droplets (fines).
• driftable fine droplets are those which are of size less than 150 ⁇ m, where this is understood by ASTM 1519 to represent the droplet size below which the droplets are driftable.
• the reduction in spray drift will be therefore understood as a reduction in the volume percentage of droplets having a droplet size of less than 150 ⁇ m compared to an analogous agrochemical formulation which does not comprise the spray drift reductant of the present invention.
• the spray drift reductant of the present invention may provide a percentage reduction of droplets having a size of less than 150 ⁇ m of at least 10% at a spray pressure of 30 psi. More preferably, at least 20%. Further preferably, at least 30%. Most preferably, at least 40%.
• the spray drift reductant of the present invention may provide a percentage reduction of droplets having a size of less than 150 ⁇ m of at least 10% at a spray pressure of 40 psi. More preferably, at least 20%. Further preferably, at least 30%. Most preferably, at least 40%.
• the spray drift reductant of the present invention may provide a percentage reduction of droplets having a size of less than 150 ⁇ m of at least 10% at a spray pressure of 60 psi. More preferably, at least 20%. Further preferably, at least 30%. Most preferably, at least 40%.
• the spray drift reductant of the present invention may provide a percentage reduction of droplets having a size of less than 105 ⁇ m of at least 10% at a spray pressure of 30 psi. More preferably, at least 20%. Further preferably, at least 30%. Most preferably, at least 40%.
• the spray drift reductant of the present invention may provide a percentage reduction of droplets having a size of less than 105 ⁇ m of at least 10% at a spray pressure of 40 psi. More preferably, at least 20%. Further preferably, at least 30%. Most preferably, at least 40%.
• the spray drift reductant of the present invention may provide a percentage reduction of droplets having a size of less than 105 ⁇ m of at least 10% at a spray pressure of 60 psi. More preferably, at least 20%. Further preferably, at least 30%. Most preferably, at least 40%.
• the spray droplet would have a median volume particle/droplet diameter value.
• the median volume particle diameter refers to the equivalent spherical diameter corresponding to the point on the distribution which divides the population exactly into two equal halves. It is the point which corresponds to 50% of the volume of all the particles, read on the cumulative distribution curve relating volume percentage to the diameter of the particles i.e. 50% of the distribution is above this value and 50% is below. This value is referred to as the ‘D(v,0.5)’ value and is determined as described herein.
• the spray drift reductant increases the D(v,0.5) value.
• the increase in the D(v,0.5) of the spray will be therefore understood as an increase in the spray droplet median volume particle/droplet diameter value compared to an analogous agrochemical formulation which does not comprise the spray drift reductant of the present invention.
• the spray drift reductant of the present invention may provide a percentage increase of the D(v,0.5) value of at least 2% at a spray pressure of 40 psi. More preferably, at least 5%. Most preferably, at least 10%.
• spray drift reductants of the present invention also provide for fewer undesired large droplets, and specifically fewer large droplets in comparison to use of polymer based spray drift reductants.
• Large undesired droplets will be understood to have a size of greater than 500 microns.
• the spray drift reductant of the present invention may provide a percentage reduction of droplets having a size of greater than 500 ⁇ m of at least 5% at a spray pressure of 30 psi. More preferably, at least 10%.
• the spray drift reductant of the present invention may provide a percentage reduction of droplets having a size of greater than 500 ⁇ m of at least 5% at a spray pressure of 40 psi. More preferably, at least 10%.
• the spray drift reductant of the present invention may provide a percentage reduction of droplets having a size of greater than 500 ⁇ m of at least 5% at a spray pressure of 60 psi. More preferably, at least 10%.
• the spray drift reductant of the present invention by reducing the amount of undesired small and large droplets, may change the droplet size distribution of a sprayed formulation.
• the width of the droplet size distribution may be defined as the ‘span’ which is a measure of the width of the distribution based on the 10%, 50% and 90% quantile.
• Span (measured in ⁇ m) may be defined as follows:
• the volume median diameter D(v,0.5) is the as defined herein.
• ‘D(v,0.9)’ and ‘D(v,0.1)’ values are the equivalent spherical diameter corresponding to 90% or 10% respectively of the volume of all the particles, read on the cumulative distribution curve relating volume percentage to the diameter of the particles, i.e. they are the points where 10% or 90% of the distribution is above this value and 90% or 10% are below the value respectively.
• the relative span value represents the width of the particle size distribution of the spray droplets, and therefore how defined the distribution is around the median particle size value. It has been found that using the spray drift reductant of the present invention spray droplet size distribution is more narrowly defined around the desired range.
• the spray drift reductant of the present invention may provide for a narrower relative span in comparison to a sprayed agrochemical formulation not comprising reductant.
• the percentage reduction in relative span is at least 4% at a spray pressure of 30 psi. More preferably, at least 8%. Further preferably, at least 10%. Most preferably, at least 12%.
• the percentage reduction in relative span is at least 4% at a spray pressure of 40 psi. More preferably, at least 8%. Further preferably, at least 10%. Most preferably, at least 12%.
• the percentage reduction in relative span is at least 4% at a spray pressure of 60 psi. More preferably, at least 8%. Further preferably, at least 10%. Most preferably, at least 12%.
• Example 1 to 17 were spray tested using a variety of nozzles. Spray characterisation tests were performed using a XR11004 nozzle, AIXR11004 nozzle, and ULD11004 nozzle, and results are shown in Tables 2, 3, and 4 respectively.
• the drift reduction potential of A1-A3 was compared to polysorbate 20.
• the above results show that the reductants of the present invention provided drift reduction compared to the control and polysorbate formulations. Additionally, this spray drift reduction was provided at low concentrations of between 0.125% and 0.5% (v/v), and across a variety of nozzles.

Landscapes

• Life Sciences & Earth Sciences (AREA)
• General Health & Medical Sciences (AREA)
• Health & Medical Sciences (AREA)
• Dentistry (AREA)
• Pest Control & Pesticides (AREA)
• Plant Pathology (AREA)
• Engineering & Computer Science (AREA)
• Agronomy & Crop Science (AREA)
• Wood Science & Technology (AREA)
• Zoology (AREA)
• Environmental Sciences (AREA)
• Toxicology (AREA)
• Agricultural Chemicals And Associated Chemicals (AREA)
• Noodles (AREA)
• Surface Heating Bodies (AREA)
• Detergent Compositions (AREA)

Priority Applications (1)

Applications Claiming Priority (3)

Related Parent Applications (1)

Related Child Applications (1)

Publications (1)

Family

ID=51352827

Family Applications (2)

Family Applications After (1)

Country Status (10)

Cited By (16)

Families Citing this family (7)

Citations (3)

Family Cites Families (16)

• 2014
  • 2014-07-29 US US14/910,846 patent/US20160192642A1/en not_active Abandoned
  • 2014-07-29 BR BR112016002915A patent/BR112016002915A2/pt not_active Application Discontinuation
  • 2014-07-29 AU AU2014306973A patent/AU2014306973A1/en not_active Abandoned
  • 2014-07-29 RU RU2016108721A patent/RU2632959C2/ru active
  • 2014-07-29 WO PCT/US2014/048609 patent/WO2015023426A1/en active Application Filing
  • 2014-07-29 CN CN201480045018.1A patent/CN105451552B/zh active Active
  • 2014-07-29 EP EP14750909.5A patent/EP3032950B1/en active Active
  • 2014-07-29 ES ES14750909T patent/ES2950420T3/es active Active
  • 2014-08-13 AR ARP140103042A patent/AR097329A1/es active IP Right Grant
• 2016
  • 2016-02-11 CL CL2016000329A patent/CL2016000329A1/es unknown
• 2018
  • 2018-03-02 AU AU2018201535A patent/AU2018201535B2/en active Active
• 2021
  • 2021-01-19 US US17/152,094 patent/US20210204541A1/en active Pending

Patent Citations (3)

Also Published As

Similar Documents

Legal Events