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CN-121986778-A - Spray drift reduction

CN121986778ACN 121986778 ACN121986778 ACN 121986778ACN-121986778-A

Abstract

Spray drift reducing agent for agrochemical formulations for reducing spray drift of agrochemical formulations containing active agents and/or micronutrients. The reducing agent is selected from alkoxylated polyols or polyamines, which are optionally acyl terminated, and the formulation may optionally contain nonionic alkoxylates. Also provided are methods of preparing the formulations, and the use of the formulations to reduce spray drift in the case of agrochemical formulations applied to plants.

Inventors

  • L. P. Dempsey
  • LINDNER GREG J.
  • J.S. sun

Assignees

  • 禾大公司

Dates

Publication Date
20260508
Application Date
20170626
Priority Date
20160701

Claims (15)

  1. 1. A sprayable agrochemical formulation comprising; i) At least one spray drift reducing agent; ii) optionally nonionic alkoxylates, and Iii) At least one agrochemical active agent and/or nutrient; Wherein the formulation comprises a reducing agent in the range of 0.001 to 4 wt%, And wherein the spray drift reducing agent has the general structure (I): Wherein the method comprises the steps of R 1 is a residue of a monosaccharide selected from glucose, fructose or sorbitol, each of said monosaccharides having m active hydrogen atoms, wherein m is an integer of at least 2; AO is oxyalkylene; Each n independently represents an integer ranging from 1 to 100; Each R 2 independently represents hydrogen, or an acyl group represented by-C (O) R 3 , wherein each R 3 independently represents a residue of a hydroxyalkyl group of the formula HO-X-COOH and a hydroxyalkenylcarboxylic acid, wherein X is a divalent saturated or unsaturated aliphatic residue containing at least 8 carbon atoms and not more than 20 carbon atoms, and wherein at least 4 carbon atoms are present directly between the hydroxyl group and the carboxylic acid group, and Wherein on average at least two R 2 groups per molecule are defined alkanoyl groups.
  2. 2. The formulation according to claim 1, wherein R 1 is a residue of a monosaccharide, disaccharide or higher oligosaccharide, or a residue derived from a monosaccharide, disaccharide or higher oligosaccharide.
  3. 3. The formulation according to any one of claims 1 to 2, wherein the alkylene oxide group AO is selected from the group consisting of oxyethylene, oxypropylene, oxybutylene, or oxytetramethylene.
  4. 4. A formulation according to any one of claims 1 to 3, wherein the value of each parameter n ranges from 2 to 50.
  5. 5. The formulation according to any one of claims 1 to 4, wherein the total number of alkylene oxide residues (i.e. n x m) in the general structure (I) is in the range of 10 to 300.
  6. 6. The formulation according to claim 1, wherein the hydroxyalkyl carboxylic acid is 12-hydroxystearic acid.
  7. 7. The formulation according to any preceding claim, wherein the spray drift reducing agent is a liquid having a molecular weight in the range 3,000 to 8,000.
  8. 8. A formulation according to any preceding claim, wherein the nonionic alkoxylate is an alkoxylated fatty alcohol.
  9. 9. A formulation according to any preceding claim, wherein the nonionic alkoxylate is an alkoxylated alcohol of the general formula: Wherein the method comprises the steps of R 4 is a linear or branched, saturated or unsaturated, substituted or unsubstituted hydrocarbon radical having from 4 to 30 carbon atoms, AO is oxyalkylene; x is an integer of 1 to 30.
  10. 10. A formulation according to any preceding claim, wherein the nonionic alkoxylate is 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.
  11. 11. A concentrate formulation suitable for preparing a sprayable agrochemical formulation according to any of claims 1 to 10, said concentrate comprising a spray drift reducer having the general structure (I): Wherein the method comprises the steps of R 1 is a residue of a monosaccharide selected from glucose, fructose or sorbitol, each of said monosaccharides having m active hydrogen atoms, wherein m is an integer of at least 2; AO is oxyalkylene; Each n independently represents an integer ranging from 1 to 100; Each R 2 independently represents hydrogen, or an acyl group represented by-C (O) R 3 , wherein each R 3 independently represents a residue of a hydroxyalkyl group of the formula HO-X-COOH and a hydroxyalkenylcarboxylic acid, wherein X is a divalent saturated or unsaturated aliphatic residue containing at least 8 carbon atoms and not more than 20 carbon atoms, and wherein at least 4 carbon atoms are present directly between the hydroxyl group and the carboxylic acid group, and Wherein on average at least two R 2 groups per molecule are defined alkanoyl groups.
  12. 12. A sprayable agrochemical formulation comprising; i) A spray drift reducing agent in the range of 0.001 to 4 wt%, wherein the reducing agent is capable of reducing spray drift by at least 10%, and Ii) at least one agrochemical active and/or nutrient, Wherein the spray drift reducing agent has the general structure (I): Wherein the method comprises the steps of R 1 is a residue of a monosaccharide selected from glucose, fructose or sorbitol, each of said monosaccharides having m active hydrogen atoms, wherein m is an integer of at least 2; AO is oxyalkylene; Each n independently represents an integer ranging from 1 to 100; Each R 2 independently represents hydrogen, or an acyl group represented by-C (O) R 3 , wherein each R 3 independently represents a residue of a hydroxyalkyl group of the formula HO-X-COOH and a hydroxyalkenylcarboxylic acid, wherein X is a divalent saturated or unsaturated aliphatic residue containing at least 8 carbon atoms and not more than 20 carbon atoms, and wherein at least 4 carbon atoms are present directly between the hydroxyl group and the carboxylic acid group, and Wherein on average at least two R 2 groups per molecule are defined alkanoyl groups.
  13. 13. Use of a compound having the general structure (I) as a spray drift reducing agent in an agrochemical formulation comprising at least one agrochemical active and/or nutrient: Wherein the method comprises the steps of R 1 is a residue of a monosaccharide selected from glucose, fructose or sorbitol, each of said monosaccharides having m active hydrogen atoms, wherein m is an integer of at least 2; AO is oxyalkylene; Each n independently represents an integer ranging from 1 to 100; Each R 2 independently represents hydrogen, or an acyl group represented by-C (O) R 3 , wherein each R 3 independently represents a residue of a hydroxyalkyl group of the formula HO-X-COOH and a hydroxyalkenylcarboxylic acid, wherein X is a divalent saturated or unsaturated aliphatic residue containing at least 8 carbon atoms and not more than 20 carbon atoms, and wherein at least 4 carbon atoms are present directly between the hydroxyl group and the carboxylic acid group, and Wherein on average at least two R 2 groups per molecule are defined alkanoyl groups.
  14. 14. A method of reducing spray drift by using an agrochemical formulation according to any one of claims 1 to 10 or claim 12 and/or a diluted concentrated formulation according to claim 11.
  15. 15. A method of treating a plant for pest control and/or nutrient provision, the method comprising applying a formulation according to any one of claims 1 to 10 or claim 12 and/or a diluted concentrated formulation according to claim 11 to the plant or the surrounding environment of the plant.

Description

Spray drift reduction The application is a divisional application of a Chinese patent application 201780038643.7 as a main case. Cross-reference to related applications The present application relates to and claims the benefits of U.S. provisional patent application No. 62/357,510 filed on 7/1/2016, the contents of which are incorporated herein by reference. Technical Field The present invention relates to spray drift reducing agents for use in agrochemical formulations, in particular for spray drift reduction and more particularly as spray drift reducing agents, and methods of reducing spray drift of agrochemical formulations comprising said compounds and one or more agrochemical active agents and/or nutrients. Background Many agricultural pesticides, including insecticides, fungicides, herbicides, miticides and plant growth regulators are applied in liquid compositions. In addition to pesticides, the liquid compositions generally include one or more compounds that are desired to improve one or more characteristics of the liquid composition such as storage stability, ease of handling, and/or efficacy of the pesticide on the target organism. The field of agricultural spray drift has been active for decades, with important findings disclosing the importance of agricultural spray mixture composition and properties to the ability of small droplets to form and the impact of this effect on drift ability. In most overwhelming cases, the references extracted herein relate to floor nozzle sprayer applications, although failing to identify or describe a predictive model with a range of characteristics measured on the spray mixture was reported, researchers have agreed very consistently throughout the last 20 years that the effectiveness of any Drift Reduction Technique (DRT) depends not only on spray system design and operating parameters, but the choice of various design and engineering parameters (nozzle type, fluid pressure, flow rate or orifice size, and spray angle) is in many cases affected by the differences in composition and characteristics of the spray mixture used. The summarized studies are well known in great detail that each spray mixture evaluated is different and includes formulated pesticidal active ingredients and more frequently several active agents are present in different formulations. Individual pesticide formulations when applied separately may be expected to exert independent effects on droplet size and spray quality, as they contain independent formulation families, many of which are surfactants or assist in concentrating the dispersed phase in the spray mixture. It is clear from the study that these substances each have importance on the final properties of the mixture and on the droplet size distribution and spray quality produced by the mixture when applied through a series of nozzles and under different spray conditions. A reasonable conclusion made when these formulations are combined into a single application is that the number of interactions of the components will increase and the type and strength of these interactions will vary based on the relative amounts of dilution and the component and concentration variations that occur in the final spray mixture. In addition, there are also effects exerted by other spray regulators or adjuvants which are also contributing components and effects which depend on their independently selected formulations, wherein the formulations each have different effects on droplet size and spray quality. Frequently, the components and effect contributions of the adjuvants used can govern the spray characteristics, especially if substances and compositions are chosen that are known to strongly influence the droplet size distribution and the spray quality of the mixture as adjuvants. To illustrate how the study understanding becomes complex, a detailed description of the effects of these spray components has emerged ten years ago, describing differences in the effects on critical droplet size criteria observed in a continuous series of similar surfactant materials. In view of this clearly demonstrated fact, the effect of nozzles alone as the only technique applied with said capability to reduce pesticide drift (whether already certified or sought to be certified for Drift Reduction Technology) does not justify the application of the data obtained with water as the spray mixture. It is now well recognized that this practice is misplaced and unduly overly simplified, particularly if (1) a solution pesticide is present that contains a significant amount of surfactant adjuvants and (2) other substances have been added that are purposefully added to modify spray droplet size, pattern or quality. The cited studies clearly describe the ability of the applied technology to reduce pesticide drift, which is more precisely defined by the combination of the contributions of the spray system design and operating parameters and the contribution of the diluted substance in