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Stabilized formulations containing fumed ALUMINUM OXIDE

A technology of fumed alumina and water emulsion, which is applied in the direction of fungicides, insecticides, biocides, etc., can solve the problems of chemical and physical stability, uneven distribution of active ingredients, physical instability, etc., and achieve excellent redispersion ability, excellent chemical and physical stability

Active Publication Date: 2017-10-24
FMC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Tank mixing two or three different commercial formulations often results in physical instability, causing precipitation, flocculation, phase separation, etc. of the active ingredient, resulting in an uneven distribution of the active ingredient
Combining active ingredients in a single formulation is advantageous, but is further complicated by the disparate physical properties of the active ingredients, where both chemical and physical stability becomes an issue

Method used

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  • Stabilized formulations containing fumed ALUMINUM OXIDE
  • Stabilized formulations containing fumed ALUMINUM OXIDE
  • Stabilized formulations containing fumed ALUMINUM OXIDE

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Preparation of Suspoemulsion Concentrate Formulations of Atrazine, Piprovir, and Metriclofenac with Fumed Alumina as Stabilizer

[0040] Step A: Atrazine / Pirovir Suspension Concentrate (SC)

[0041] 179.90 grams of deionized water, 0.10 grams of glacial acetic acid, 36.00 grams of polyethylene glycol, 0.60 grams of antifoaming agent (from Dow Chemical Company Antifoam AF), 0.60 grams of preservatives (from Dow ChemicalCompany's Kathon TM CG / ICP), 14.10 grams of alkyl EO / PO copolymer nonionic surfactant (Tergitol from Dow Chemical Company TM XD), 20.10 grams of acrylic graft copolymer surfactant (from Huntsman Performance Products G-2500), 7.80 grams of an aqueous dispersion of fumed alumina (from Evonic Industries W630), 37.50 grams of Pirov (99.3% purity) and 303.0 grams of Atrazine (97.0% purity) were added to a 1 liter beaker and mixed using a Silverson homogenizer at 4500 rpm for five minutes. The mixture was transferred to an Eiger mill and milled at 3000 ...

Embodiment 2

[0048] Preparation of Atrazine / Pirovet Suspension Concentrate (SC) and Meclofenac Aqueous Emulsion (EW) Using Fumed Alumina as Stabilizer

[0049] In a manner similar to step A of Example 1, an additional SC composition comprising atrazine and piprovir was prepared. In a manner analogous to Example 1, Step B, an additional EW composition comprising mefenoxetate was prepared. Table 2A below summarizes additional SC compositions; Table 2B summarizes additional EW compositions.

[0050] Table 2A

[0051] SC Compositions Comprising Atrazine and Pirov

[0052]

[0053] Pirowe 99.3% pure

[0054] Atrazine 97% purity

[0055] Terg XD = Tergitol from The Dow Chemical Company TM XD

[0056] Tersp2500 = from Huntsman Performance Products 2500

[0057] Areodisp = from Evonic Industries W630

[0058] Glycol = propylene glycol

[0059] Dow AF = from The Dow Chemical Company Antifoam AF

[0060] Kathon = Kathon from The Dow Chemical Company TM CG / ICP

[0061] Thickene...

Embodiment 3

[0074]Preparation of Suspoemulsion Concentrate Formulations of Atrazine, Piprovir, and Meclofenac Using Fumed Alumina as Stabilizer

[0075] Step A: Atrazine / Pirovir Suspension Concentrate

[0076] 2.311 kg of deionized water, 7.7 grams of glacial acetic acid, 463.0 grams of propylene glycol, 7.7 grams of antifoam (from The Dow Chemical Company Antifoam AF), 6.9 grams of preservatives (from ThorSpecialties, Inc. MV), 181.4 grams of alkyl EO / PO copolymer nonionic surfactant (Tergitol from The Dow Chemical Company TM XD), 258.5 grams of acrylic graft copolymer surfactant (from Huntsman Performance Products G-2500) mixture was added to the slurry tank and mixed until homogeneous. Pirov (480.0 grams, 99.3% purity) and atrazine (3.862.0 kg, 97.0% purity) were added in portions such that the barrel portions were thoroughly mixed before the next portion was added. The mixture was transferred to an attritor and ground, keeping the temperature below 30 °C, until a particle size...

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Abstract

The present invention relates to novel herbicidal aqueous suspoemulsion or aqueous suspension compositions comprising a herbicidal active agent and fumed alumina as a stabilizer, having excellent chemical and physical stabilizers and excellent redispersion properties.

Description

field of invention [0001] The present invention relates to the field of agrochemical formulations. Background technique [0002] In order to be able to effectively eliminate or control unwanted vegetation, it is desirable to use effective herbicide chemicals. Compositions comprising two or more herbicides are desirable in agricultural specialty applications and related endeavors because of the desire to broaden the spectrum or range of control of unwanted plant species that are killed or controlled. [0003] Due to the desirability of having compositions with the above properties, it is beneficial to use combinations of herbicides in a single herbicidal application to obtain enhanced control of multiple weeds. Combinations of pesticides are known and are available as mixed solutions of the active ingredients in commercially available formulations. One method of preparing such compositions is known as "tank mixing", wherein the ingredients in their commercial form are mixed...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N43/90A01N43/70A01N43/80A01N25/04A01N25/22A01P3/00A01P7/04A01P13/00
CPCA01N43/70A01N43/80A01N43/90
Inventor T·马丁
Owner FMC CORP