MXPA01008533A - Inhibiting growth of microorganisms in water-based pesticide suspensions - Google Patents
Inhibiting growth of microorganisms in water-based pesticide suspensionsInfo
- Publication number
- MXPA01008533A MXPA01008533A MXPA/A/2001/008533A MXPA01008533A MXPA01008533A MX PA01008533 A MXPA01008533 A MX PA01008533A MX PA01008533 A MXPA01008533 A MX PA01008533A MX PA01008533 A MXPA01008533 A MX PA01008533A
- Authority
- MX
- Mexico
- Prior art keywords
- weight
- composition
- water
- acetic acid
- microorganisms
- Prior art date
Links
- 239000000575 pesticide Substances 0.000 title claims abstract description 21
- 239000000725 suspension Substances 0.000 title claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 244000005700 microbiome Species 0.000 title claims abstract description 14
- 230000002401 inhibitory effect Effects 0.000 title claims abstract description 7
- QTBSBXVTEAMEQO-UHFFFAOYSA-N acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims abstract description 66
- 239000000203 mixture Substances 0.000 claims abstract description 37
- 239000007798 antifreeze agent Substances 0.000 claims abstract description 12
- 239000004094 surface-active agent Substances 0.000 claims abstract description 12
- 230000000361 pesticidal Effects 0.000 claims description 19
- 230000000749 insecticidal Effects 0.000 claims description 12
- 239000002917 insecticide Substances 0.000 claims description 10
- 239000002562 thickening agent Substances 0.000 claims description 7
- -1 alkyl naphthalenesulfonates Chemical class 0.000 claims description 6
- 229920001400 block copolymer Polymers 0.000 claims description 6
- WSFSSNUMVMOOMR-UHFFFAOYSA-N formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 6
- UFWIBTONFRDIAS-UHFFFAOYSA-N naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 claims description 6
- XSQUKJJJFZCRTK-UHFFFAOYSA-N urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 4
- YWTYJOPNNQFBPC-UHFFFAOYSA-N Imidacloprid Chemical group [O-][N+](=O)\N=C1/NCCN1CC1=CC=C(Cl)N=C1 YWTYJOPNNQFBPC-UHFFFAOYSA-N 0.000 claims description 3
- 230000000855 fungicidal Effects 0.000 claims description 3
- 239000000417 fungicide Substances 0.000 claims description 3
- 230000002363 herbicidal Effects 0.000 claims description 3
- 239000004009 herbicide Substances 0.000 claims description 3
- GOOHAUXETOMSMM-UHFFFAOYSA-N propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 claims description 3
- 229920001285 xanthan gum Polymers 0.000 claims description 3
- 239000000230 xanthan gum Substances 0.000 claims description 3
- 235000010493 xanthan gum Nutrition 0.000 claims description 3
- 229940082509 xanthan gum Drugs 0.000 claims description 3
- 239000005906 Imidacloprid Substances 0.000 claims description 2
- 229920001732 Lignosulfonate Polymers 0.000 claims description 2
- 125000005192 alkyl ethylene group Chemical group 0.000 claims description 2
- 125000005233 alkylalcohol group Chemical group 0.000 claims description 2
- 239000004202 carbamide Substances 0.000 claims description 2
- 239000001913 cellulose Substances 0.000 claims description 2
- 229920002678 cellulose Polymers 0.000 claims description 2
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical class [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 2
- 235000011187 glycerol Nutrition 0.000 claims description 2
- 150000002334 glycols Chemical class 0.000 claims description 2
- 229940056881 imidacloprid Drugs 0.000 claims description 2
- 239000000391 magnesium silicate Substances 0.000 claims description 2
- 235000012243 magnesium silicates Nutrition 0.000 claims description 2
- 125000002467 phosphate group Chemical class [H]OP(=O)(O[H])O[*] 0.000 claims description 2
- 239000000419 plant extract Substances 0.000 claims description 2
- 229920000058 polyacrylate Polymers 0.000 claims description 2
- PSZYNBSKGUBXEH-UHFFFAOYSA-M naphthalene-1-sulfonate Chemical class C1=CC=C2C(S(=O)(=O)[O-])=CC=CC2=C1 PSZYNBSKGUBXEH-UHFFFAOYSA-M 0.000 claims 1
- IAYPIBMASNFSPL-UHFFFAOYSA-N oxane Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 claims 1
- 238000009472 formulation Methods 0.000 description 12
- 230000002335 preservative Effects 0.000 description 5
- 239000003755 preservative agent Substances 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 229920000233 poly(alkylene oxides) Polymers 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- 150000001298 alcohols Chemical class 0.000 description 2
- 239000003945 anionic surfactant Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002736 nonionic surfactant Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 241000894007 species Species 0.000 description 2
- 239000004546 suspension concentrate Substances 0.000 description 2
- 244000215068 Acacia senegal Species 0.000 description 1
- 229920005682 EO-PO block copolymer Polymers 0.000 description 1
- 229920002907 Guar gum Polymers 0.000 description 1
- 229920000084 Gum arabic Polymers 0.000 description 1
- 239000005583 Metribuzin Substances 0.000 description 1
- FOXFZRUHNHCZPX-UHFFFAOYSA-N Metribuzin Chemical group CSC1=NN=C(C(C)(C)C)C(=O)N1N FOXFZRUHNHCZPX-UHFFFAOYSA-N 0.000 description 1
- LZGUHMNOBNWABZ-UHFFFAOYSA-N N-nitro-N-phenylnitramide Chemical compound [O-][N+](=O)N([N+]([O-])=O)C1=CC=CC=C1 LZGUHMNOBNWABZ-UHFFFAOYSA-N 0.000 description 1
- IZUPBVBPLAPZRR-UHFFFAOYSA-N Pentachlorophenol Chemical compound OC1=C(Cl)C(Cl)=C(Cl)C(Cl)=C1Cl IZUPBVBPLAPZRR-UHFFFAOYSA-N 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- WXMKPNITSTVMEF-UHFFFAOYSA-M Sodium benzoate Chemical compound [Na+].[O-]C(=O)C1=CC=CC=C1 WXMKPNITSTVMEF-UHFFFAOYSA-M 0.000 description 1
- 239000005839 Tebuconazole Substances 0.000 description 1
- PXMNMQRDXWABCY-UHFFFAOYSA-N Tebuconazole Chemical group C1=NC=NN1CC(O)(C(C)(C)C)CCC1=CC=C(Cl)C=C1 PXMNMQRDXWABCY-UHFFFAOYSA-N 0.000 description 1
- 239000000205 acacia gum Substances 0.000 description 1
- 235000010489 acacia gum Nutrition 0.000 description 1
- 230000002378 acidificating Effects 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 239000007900 aqueous suspension Substances 0.000 description 1
- 125000003710 aryl alkyl group Chemical group 0.000 description 1
- 229960000892 attapulgite Drugs 0.000 description 1
- 229920003086 cellulose ether Polymers 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000000994 depressed Effects 0.000 description 1
- KARVSHNNUWMXFO-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane;hydrate Chemical class O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O KARVSHNNUWMXFO-UHFFFAOYSA-N 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- SXRSQZLOMIGNAQ-UHFFFAOYSA-N glutaraldehyde Chemical compound O=CCCCC=O SXRSQZLOMIGNAQ-UHFFFAOYSA-N 0.000 description 1
- 150000004676 glycans Polymers 0.000 description 1
- 239000000665 guar gum Substances 0.000 description 1
- 235000010417 guar gum Nutrition 0.000 description 1
- 229960002154 guar gum Drugs 0.000 description 1
- 239000008240 homogeneous mixture Substances 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000000813 microbial Effects 0.000 description 1
- 229910052625 palygorskite Inorganic materials 0.000 description 1
- 239000003090 pesticide formulation Substances 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- 150000004804 polysaccharides Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000002035 prolonged Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000004299 sodium benzoate Substances 0.000 description 1
- 235000010234 sodium benzoate Nutrition 0.000 description 1
- 150000003871 sulfonates Chemical class 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
Abstract
The present invention provides a composition for inhibiting the growth of microorganisms in water-based pesticide suspensions. In accordance with this invention, the composition comprises from about 0.01%to about 60%by weight of a pesticide;from about 0%to about 20%by weight of a surfactant;from about 0%to about 20%by weight of an antifreeze agent;from about 0%to about 5%by weight of a viscosity builder;from about 0.5%to about 2%by weight of acetic acid;and from about 10%to about 99.49%by weight of water. In a preferred embodiment of the invention, the acetic acid has a pH of from about 3 to about 5.
Description
INHIBITION OF THE GROWTH OF MICROORGANISMS IN SUSPENSIONS OF PESTICIDES BASED ON WATER
TECHNICAL FIELD OF THE INVENTION The present invention relates to a composition for inhibiting or eliminating the growth of microorganisms in water-based pesticidal suspensions. More specifically, the composition of the present invention consists of a pesticide, a surfactant, an antifreeze agent, a viscosity improver, acetic acid and water. The acetic acid is present in an amount of about 0.5% to about 2% by weight of the total pesticide suspension. The pH of the acetic acid is from about 3 to about 5. BACKGROUND OF THE INVENTION A pesticidal suspension is a homogeneous mixture of small solid particles of pesticide suspended in a liquid medium. The growth of microorganisms in the pesticidal suspension can cause the formation of a solid precipitate and, therefore, a loss of homogeneity in the mixture. The formation of the precipitate and the loss of homogeneity can lead to a failure of the product due to non-uniform applications of the pesticide and to sealing of de-purifiers and nozzles used with the application equipment. A practice developed in the art is the combination or formulation of pesticidal compounds with a preservative to reduce or eliminate the growth of microorganisms in pesticide suspensions. In U.S. Pat. No. 5,283,231 describes formaldehyde, sodium benzoate, glutaraldehyde, and pentachlorophenol as effective preservatives to prevent microbial spoilage in suspensions of low-melting dinitroaniline pesticides. Not all preservatives are effective against all types of microorganisms in all pesticide suspensions. Therefore, there is a need in the art to determine specific preservatives that are effective in a particular fluid aqueous pesticidal composition (i) to reduce or eliminate the growth of microorganisms, (ii) being at the same time easy to handle during its preparation and use and (iii) maintaining an excellent shelf life even during prolonged storage. OBJECTS OF THE INVENTION It is an object of the present invention to provide a composition for inhibiting or eliminating the growth of microorganisms in suspensions of water-based pesticides. This and other objects that will be apparent to those skilled in the art are achieved by the addition of acetic acid to the water-based pesticidal formulation. The composition of the water-based pesticidal formulation includes from about 0.01% to about 60% by weight of a pesticide, from about 0% to about 20% by weight of a surfactant, of about 0% by weight. about 20% by weight of an antifreeze agent, from about 0% to about 5% of a viscosity improver and from about 10% to about 99.49% of water. Acetic acid is added to the pesticide formulation based on water in an amount of about 0.5% to about 2% by weight of the formulation. The pH of the acetic acid is from about 3 to about 5. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS OF THE INVENTION The composition of the pesticidal suspension of the present invention consists of a combination of a pesticidal formulation based on water and acetic acid. The pesticidal formulation includes a pesticide, a surfactant, a thickener, an antifreeze agent and water. The pesticide is selected from the group consisting of an insecticide, a fungicide and a herbicide. Preferably, the insecticide is imidaclo-prid, the fungicide is tebuconazole and the herbicide is metribuzin. The pesticide is present in an amount such that it re-presents from about 0.01% to about 60% by weight of the total pesticidal suspension. Surfactants are used to reduce the surface tension at the water-solid interface and, therefore, they increase the tendency of the water to contact the entire surface of the particles of the active component. Suitable surfactants include wetting agents and dispersing agents. In addition, both anionic and nonionic surfactants are useful. Examples of anionic surfactants include arylalkyl sulphonates and alkyl naphthalenesulfonates. Nonionic surfactants include arylalkyl polyether alcohols, polyalkylene oxide block copolymers, polyalkylene oxide block copolymer monohydric alcohols and alkylphenols of polyalkylene oxide block copolymers. Preferred surfactants include condensates of naphthalene and formaldehyde, sulfonates of naphthalene, alkyl naphthalene sulfonates, lignosulfonates, block copolymers of ethylene oxide and propylene oxide, ethoxylates of alkylalcohols, ethoxylates of al-quilphenols, sodium dodecylbenzenesulfonates, ethoxylates of tristyrylphenol, block copolymers of alkylethylene oxide and propylene oxide, polyacrylates and phosphate esters. The amount of surfactant in the pesticidal formulation is such that it represents from about 0% to about 20% by weight of the total pesticide suspension. A viscosity improver is generally an anionic water-soluble or water-dispersible colloid possessing shear thinning properties, low temperature sensitivity, good stability in both acidic and basic media and compatibility with most inorganic materials. Suitable thickening agents include thickeners. Examples of viscosity improvers include polysaccharide gums, such as xanthan gum, guar gum, gum arabic, organically modified montmorillonite clays, attapulgite clays, carboxy-vinyl copolymers and cellulose ethers. Preferred viscosity improvers include xanthan gum, aluminum magnesium silicates, thickeners of plant extracts and thickeners of cellulose derivatives. The viscosity improver is present in an amount such that it represents from about 0% to about 5% by weight of the total pesticidal suspension.
An antifreeze agent is a depressant of the freezing point. Examples of antifreeze agents include relatively low molecular weight aliphatic alcohols. Preferred antifreeze agents include glycols, glycerin and urea. The amount of antifreeze agent in the pesticidal formulation is such that it represents from about 0% to about 20% by weight of the total pesticidal suspension. The acetic acid in the composition serves as a preservative, which is used to reduce or eliminate the growth of microorganisms in the mixture. The acetic acid is present in an amount such that it represents from about 0.5% to about 2% by weight of the total pesticidal suspension and, preferably, from about 0.6% to about 1% by weight. Further, in a preferred embodiment, the acetic acid has a pH of from about 3 to about 5. The composition of the pesticidal suspension also includes from about 10% to about 99.49% by weight of water. The composition of the pesticidal suspension of the present invention is generally as follows.
Having thus described our invention, the following examples are given as illustrative thereof and are not intended to be in any way limiting the specification and the claims. All weights and percentages given are parts by weight or percentages by weight, unless otherwise indicated. EXAMPLES Example 1 A study was carried out to demonstrate the effectiveness of adding from about 0.0% to about 1% by weight of acetic acid to inhibit or eliminate the growth of microorganisms in a suspension concentrate based on water (CS ) that contained 2 pounds per gallon of insecticide (ADMIRE 2F). The insecticidal formulation was mixed together and homogenized by m of a high shear mixer. The composition of the insecticidal formulation included approximately 21% by weight of a finely ground solid insecticide, approximately 4% by weight of a surfactant, approximately 10% by weight of an antifreeze agent, approximately 0.18% by weight. weight of a viscosity improver, approximately 64% by weight of water and acetic acid levels in the range of 0.0% to 1.0%, as seen in the following Table 1. Acetic acid had a pH in the range of 3 to 5. The samples were then inoculated with species of bacteria specific for the production site and evaluated for a period of 72 hours at a temperature of about 30 ° C. Table 1
Example 2 A study was conducted to demonstrate the effectiveness of 0.0% to 1% by weight of acetic acid in inhibiting or eliminating the growth of microorganisms in a water-based suspension concentrate (CS) containing 1, 6 pounds per gallon of insecticide (PROVADO 1.6F). The insecticide formulation was mixed together and homogenized by m of a high shear mixer. The composition of the insecticide formulation included about 17% by weight of a finely ground solid insecticide, about 4% by weight of a surfactant, about 10% by weight of an antifreeze agent, about 0.25% by weight of a viscosity improver, about 68% by weight of water and acetic acid levels in a range of 0.0% to 1.0%, as shown in Table 2 given below. The pH of the acetic acid was in the range of 3 to 5. The samples were then inoculated with species of bacteria that were specific to the production site and were evaluated over a period of 72 hours at a temperature of approximately 30 °. C.
Table 2
The results shown in Tables 1 and 2 show that the addition of from about 0.6% by weight to about 1% by weight of acetic acid to the pesticide-based water suspension was effective in eliminating the growth of microorganisms throughout the 72-hour trial period. Although the invention has been described in detail in the foregoing for purposes of illustration, it is to be understood that such detail has only that purpose and that those skilled in the art can make variations therein without deviating from the spirit and scope of the invention, except in what may be limited by the claims.
Claims (8)
1. A composition for inhibiting or eliminating the growth of microorganisms in suspensions of water-based pesticides, consisting of: a. from about 0.01% to about 60% by weight of a pesticide, b. from about 0% to about 20% by weight of a surfactant, c. from about 0% to about 20% by weight of an antifreeze agent, d. from about 0% to about 5% by weight of a viscosity improver, e. from about 0.5% to about 2% by weight of acetic acid and f. from about 10% to about 99.49% by weight of water.
2. The composition of Claim 1, wherein the acetic acid is present in an amount of about 0.6% to about 1.0% by weight of the pesticidal suspension.
3. The composition of Claim 1, wherein the pesticide is selected from the group consisting of an insecticide, a herbicide and a fungicide.
4. The composition of Claim 2, wherein the insecticide is imidacloprid.
5. The composition of Claim 1, wherein the surfactant is selected from the group consisting of naphthalene / formaldehyde condensates, naphthalene sulfonates, alkyl naphthalenesulfonates, lignosulfonates, ethylene oxide / propylene oxide block copolymers, alkylalcohol ethoxylates , alkylphenol ethoxylates, sodium dodecylbenzenesulfonates, tristyrylphenol ethoxylates, alkylethylene oxide / propylene oxide block copolymers, polyacrylates and phosphate esters.
6. The composition of Claim 1, wherein the antifreeze agent is selected from the group consisting of glycerin, glycols and urea.
7. The composition of Claim 1, wherein the viscosity improver is selected from the group consisting of xanthan gum, aluminum magnesium silicates, thickeners of plant extracts and thickeners of cellulose derivatives.
8. The composition of Claim 1, wherein the pH of the acetic acid is from about 3 to about 5.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09264202 | 1999-03-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
MXPA01008533A true MXPA01008533A (en) | 2002-05-09 |
Family
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