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BR-112016002915-B1 - Sprayable agrochemical formulation, concentrated formulation, use of a fatty ester of a C3 to C8 polyol, or oligomer thereof, and methods for reducing spray drift and for vegetation treatment to control pests and/or provide nutrients.

BR112016002915B1BR 112016002915 B1BR112016002915 B1BR 112016002915B1BR-112016002915-B1

Abstract

SPRAYABLE AGROCHEMICAL FORMULATION, CONCENTRATED FORMULATION, USE OF A FATTY ESTER OF A C3 TO C8 POLYOL, OR OLIGOMER THEREOF, AND METHODS FOR REDUCING SPRAY DEVIATION AND FOR VEGETATION TREATMENT TO CONTROL PESTS AND/OR PROVIDE NUTRIENTS. Spray deviation reducing agents for agrochemical formulations and methods for reducing spray deviation in agrochemical formulations are disclosed. An agrochemical formulation may comprise at least one spray deviation reducing agent comprising a fatty ester of a C3 to C8 polyol, or oligomer thereof having 2 to 5 repeating units. The formulation also comprises at least one agrochemical and/or nutrient active ingredient, and optionally a clathrate compound. A sprayable agrochemical formulation may comprise 0.01% by weight to 1.0% by weight of a spray drift reducing agent that is non-ionic, non-self-emulsifying, has a hydrophilic-lipophilic balance of less than 7, and is capable of reducing spray drift by at least 10%, and also comprises at least one agrochemical and/or nutrient active ingredient, and optionally, a clathrate compound.

Inventors

  • GREGORY JAMES LINDNER
  • KEVIN WADE PENFIELD

Assignees

  • CRODA, INC

Dates

Publication Date
20260317
Application Date
20140729
Priority Date
20130814

Claims (18)

  1. 1. Sprayable agrochemical formulation, characterized in that it comprises: i) a concentration of 0.01% by weight to 2% by weight of at least one spray drift reducing agent comprising a fatty ester of a C3 to C8 polyol, or an oligomer thereof having 2 to 5 repeating units; ii) at least one active agrochemical and/or nutrient ingredient; iii) optionally a clathrate compound; and iv) surfactants wherein the fatty ester of a C3 to C8 polyol, or its oligomer, has a general structure (I): wherein: P is a residue of a C3 to C8 polyol, or an oligomeric residue thereof having 2 to 5 repeating units, each said polyol having m active hydrogen atoms, where m is an integer in the range of 2 to 7; each R1 independently represents hydrogen, a C1 to C28 hydrocarbyl, or an alkanoyl group represented by -C(O)R2 wherein R2 represents a C8 to C28 hydrocarbyl; wherein at least one R1 group is or comprises an alkanoyl group represented by -C(O)R2, wherein it comprises surfactants selected from nonionic alkoxylates and alkoxylated fatty alcohol, wherein the nonionic alkoxylate component is selected from lauryl alcohol ethoxylate (4 EO), lauryl alcohol ethoxylate (5 EO), lauryl alcohol ethoxylate (6 EO), oleyl alcohol ethoxylate (3 EO), oleyl alcohol ethoxylate (5 EO) or oleyl alcohol ethoxylate (10 EO); and wherein the polyol is 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, wherein said formulation is in the form of a suspension concentrate (SC), an oil-based suspension concentrate (OD), or a suspoemulsion (SE), wherein the hydrophilic-lipophilic balance (HLB) of the spray deviation reducing agent is in the range of 4 to 5 when based on C6 sugar alcohols, and less than 4 when based on C3 polyols, in that the fatty esters of C3 to C8 polyols or their oligomers are selected from sorbitan monooleate, glycerol monooleate, sorbitan sesquioleate, sorbitan dioleate, sorbitan trioleate, glycerol ester of talol or diglycerol ester of talol, 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 soybean oil or diglycerol ester of soybean oil, diglycerol oleate, triglycerol oleate, diglycerol isostearate, or triglycerol isostearate.
  2. 2. Formulation according to claim 1, characterized in that the polyol residue is a C3 to C6 polyol residue.
  3. 3. Formulation according to claim 1 or 2, characterized in that said oligomer has 2 to 4 repeating units.
  4. 4. Formulation according to any of the preceding claims, characterized in that the polyol oligomer is selected from diglycerol, triglycerol, tetraglycerol, dierythritol, trierythritol, tetraerythritol, di-1,3-propanediol, tri-1,3-propanediol, di(trimethylolpropane), or tri(trimethylolpropane).
  5. 5. Formulation according to any of the preceding claims, characterized in that the polyol has a value of m active hydrogen atoms in the range of 2 to 6.
  6. 6. Formulation according to any one of claims 2 to 5, characterized in that the hydrocarbyl group R1 is selected from a C1 to C28 alkyl or a C1 to C28 alkenyl.
  7. 7. Formulation according to claim 6, characterized in that the C1 to C28 alkyl or a C1 to C28 alkenyl is selected from dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, nonadecyl, eicosyl, or their branched variants, and the alkenyl radicals are selected from dodecenyl, tridecenyl, tetradecenyl, pentadecenyl, hexadecenyl, heptadecenyl, octadecenyl, nonadecenyl, eicosenyl, or their branched variants.
  8. 8. Formulation according to any of the preceding claims, characterized in that said alkanoyl group represented by -C(O)R2 is a fatty acid residue.
  9. 9. Formulation according to claim 8, characterized in that the fatty acid is selected from among C10 to C30 fatty acids.
  10. 10. Formulation according to claim 8 or 9, characterized in that the fatty acid is selected from caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, arachidic acid, behenic acid, lignoceric acid, 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.
  11. 11. Formulation according to any of the preceding claims, characterized in that the fatty esters of C3 to C8 polyols or their oligomers are selected from glycerol, diglycerol, or sorbitan esters of oleic acid, elaidic acid, linoleic acid, or erucic acid.
  12. 12. Formulation according to any of the preceding claims, characterized in that the clathrates are urea clathrates or thiourea clathrates.
  13. 13. Formulation according to any of the preceding claims, characterized in that the molecular weight (weight average) of the spray drift reducing agent is in the range of 200 to 2,200.
  14. 14. Sprayable agrochemical formulation according to claim 1, characterized in that it comprises: i) a spray drift reducing agent in the range of 0.01% by weight to 1.0% by weight, wherein the spray drift reducing agent is non-ionic, non-self-emulsifying, has an HLB less than 7, and is capable of reducing spray drift by at least 10%; and ii) at least one agrochemical and/or nutrient active ingredient; and iii) optionally a clathrate compound.
  15. 15. A concentrated formulation suitable for preparing a sprayable agrochemical formulation as defined in any one of claims 1 to 14, said concentrated formulation characterized in that it comprises from 0.01% by weight to 2% by weight of a spray deviation reducing agent of a fatty ester of a C3 to C8 polyol, or oligomer thereof having 2 to 5 repeating units.
  16. 16. Use of a fatty ester of a C3 to C8 polyol, or oligomer thereof having 2 to 5 repeating units, characterized by being used as a spray drift reducing agent in an agrochemical formulation comprising at least one agrochemical and/or nutrient active ingredient, and optionally a clathrate compound.
  17. 17. Method for reducing spray drift, characterized by the use of an agrochemical formulation as defined in any of claims 1 to 14, and/or a diluted concentrated formulation as defined in claim 15.
  18. 18. A method for treating vegetation to control pests and/or provide nutrients, said method characterized in that it comprises applying a formulation as defined in any one of claims 1 to 14, and/or a diluted concentrated formulation as defined in claim 15, either to said vegetation or to the immediate environment of said vegetation.

Description

[001] This application relates to, and claims the benefit of priority to, U.S. Provisional Application No. 61/865,753, entitled "SPRAY DRIFT REDUCTION," filed August 14, 2013, the contents of which are incorporated herein in their entirety by reference for all purposes. [002] The present invention relates to spray drift reducing agents for agrochemical formulations, particularly for use in reducing spray drift, and more specifically for use as spray drift reducing agents and to a method of reducing spray drift in agrochemical formulations comprising said compounds with one or more agrochemical active ingredients and/or nutrients. [003] Many agricultural pesticides, including insecticides, fungicides, herbicides, miticides, and plant growth regulators, are applied in the form of a liquid composition. In addition to the pesticide, such liquid compositions typically include one or more compounds intended to enhance one or more properties of the liquid composition, such as storage stability, ease of handling, and/or pesticide efficacy against target organisms. [004] The field of agricultural spray drift has been active for several decades with significant findings published on the importance of agricultural spray mixture properties and composition on the potential for small droplet formation and the influence of this effect on drift potential. In the overwhelming majority of circumstances for the reviewed citations here related to ground-level spray boom applications, although the inability to identify or describe a single predictive model using the spectrum of measured properties was reported, there was significant agreement of opinion among researchers over the previous 20 years that the effectiveness of any Drift Reduction Technology (DRT) is a function not only of the operational parameters and design of the spraying system, but that each selection of design and engineering parameters (nozzle type, fluid pressure, flow rate or orifice size, and spray angle) is influenced, in many cases differently, by the composition and properties of the applied spray mixture. [005] As has been captured by the research summarized in great detail, each spray mixture evaluated is different and is composed of a formulated pesticide active ingredient and more frequently several active ingredients appearing in different formulations. It would be predicted that each pesticide formulation would exert an independent effect on droplet size and spray quality when applied separately because they contain independent arrangements of formulants, many of which are surface-active agents or contribute to the concentration of the dispersed phases in the spray mixture. The research is clear on the importance of each of these materials for the final properties of the mixture and also for the droplet size distribution and spray quality produced by the mixture when applied through a series of nozzles and under different spraying conditions. [006] When these formulations are combined in a single application, it is reasonable to conclude that the number of interactions between the components will increase and that the types and strength of these interactions will change based on changes in the relative dilution rates and the components and concentrations that appear in the final spray mixture. Added to this will be the influence exerted by other adjuvants or spray modifiers which are also contributing components and effects that are a function of their independently selected formulators, each of which has a different effect on droplet size and spray quality. Frequently, the component and effect contributions of the adjuvants used can dominate the spray properties, particularly when the adjuvant is selected for materials and compositions that are known to strongly influence the droplet size distribution and spray quality of a mixture. To illustrate how sophisticated this research understanding has become, detailed descriptions of the influence of spray components emerged over the past decade, to the point of describing differences in effect on critical droplet size criteria observed in a continuous series of analogous surfactant materials. [007] Considering this clearly demonstrated fact, the performance of a nozzle alone as the sole technology applied in the stated capacity to reduce pesticide drift (whether already certified or seeking certification as a Drift Reduction Technology) cannot be certified for application using data developed with water as the spray mixture. It is now well recognized that this practice is misguided and has been inappropriately oversimplified, especially when (1) a pesticide solution containing significant amounts of surfactant adjuvant is present and (2) other materials intentionally added to modify droplet size, pattern, or quality have been added. [008] The cited research clearly describes the ability of an applied technology to reduce pesticide drift to be more accurately defined using a combination of the contrib