OA19681A - A stable agrochemical composition and process thereof. - Google Patents
A stable agrochemical composition and process thereof. Download PDFInfo
- Publication number
- OA19681A OA19681A OA1201900468 OA19681A OA 19681 A OA19681 A OA 19681A OA 1201900468 OA1201900468 OA 1201900468 OA 19681 A OA19681 A OA 19681A
- Authority
- OA
- OAPI
- Prior art keywords
- active ingrédient
- additive
- low melting
- agrochemical composition
- premix
- Prior art date
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- WQRCEBAZAUAUQC-UHFFFAOYSA-N ethyl 2-(4-chloro-2-oxo-1,3-benzothiazol-3-yl)acetate Chemical group C1=CC=C2SC(=O)N(CC(=O)OCC)C2=C1Cl WQRCEBAZAUAUQC-UHFFFAOYSA-N 0.000 description 1
- KQTVWCSONPJJPE-UHFFFAOYSA-N etridiazole Chemical compound CCOC1=NC(C(Cl)(Cl)Cl)=NS1 KQTVWCSONPJJPE-UHFFFAOYSA-N 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- DMYHGDXADUDKCQ-UHFFFAOYSA-N fenazaquin Chemical compound C1=CC(C(C)(C)C)=CC=C1CCOC1=NC=NC2=CC=CC=C12 DMYHGDXADUDKCQ-UHFFFAOYSA-N 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- LYCAIKOWRPUZTN-UHFFFAOYSA-N glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- ISGUIIHZEJGUGQ-UHFFFAOYSA-N heptacosaethylene glycol monomethyl ether Chemical compound COCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCO ISGUIIHZEJGUGQ-UHFFFAOYSA-N 0.000 description 1
- 239000008240 homogeneous mixture Substances 0.000 description 1
- 229940056881 imidacloprid Drugs 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 229910000460 iron oxide Inorganic materials 0.000 description 1
- CAVJXSIWUWTTQE-UHFFFAOYSA-N iron(2+);oxygen(2-);titanium(2+) Chemical compound [O-2].[O-2].[Ti+2].[Fe+2] CAVJXSIWUWTTQE-UHFFFAOYSA-N 0.000 description 1
- VRWKTAYJTKRVCU-UHFFFAOYSA-N iron(6+);hexacyanide Chemical compound [Fe+6].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-] VRWKTAYJTKRVCU-UHFFFAOYSA-N 0.000 description 1
- 230000002045 lasting Effects 0.000 description 1
- 238000011068 load Methods 0.000 description 1
- CIEXPHRYOLIQQD-UHFFFAOYSA-N methyl N-(2,6-dimethylphenyl)-N-2-furoylalaninate Chemical compound CC=1C=CC=C(C)C=1N(C(C)C(=O)OC)C(=O)C1=CC=CO1 CIEXPHRYOLIQQD-UHFFFAOYSA-N 0.000 description 1
- 239000011859 microparticle Substances 0.000 description 1
- 230000004660 morphological change Effects 0.000 description 1
- UFWIBTONFRDIAS-UHFFFAOYSA-N naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 1
- PSZYNBSKGUBXEH-UHFFFAOYSA-N naphthalene-1-sulfonic acid Chemical class C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 PSZYNBSKGUBXEH-UHFFFAOYSA-N 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- IAYPIBMASNFSPL-UHFFFAOYSA-N oxane Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 1
- 230000002688 persistence Effects 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- ABLZXFCXXLZCGV-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)=O ABLZXFCXXLZCGV-UHFFFAOYSA-N 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 230000003389 potentiating Effects 0.000 description 1
- 230000002335 preservative Effects 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- GOOHAUXETOMSMM-UHFFFAOYSA-N propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 1
- 229940108410 resmethrin Drugs 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 235000019333 sodium laurylsulphate Nutrition 0.000 description 1
- 239000004328 sodium tetraborate Substances 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000001694 spray drying Methods 0.000 description 1
- 229920001909 styrene-acrylic polymer Polymers 0.000 description 1
- 235000000346 sugar Nutrition 0.000 description 1
- 239000001117 sulphuric acid Substances 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- OBZIQQJJIKNWNO-UHFFFAOYSA-N tolclofos-methyl Chemical compound COP(=S)(OC)OC1=C(Cl)C=C(C)C=C1Cl OBZIQQJJIKNWNO-UHFFFAOYSA-N 0.000 description 1
- HSMVPDGQOIQYSR-KGENOOAVSA-N triflumizole Chemical compound C1=CN=CN1C(/COCCC)=N/C1=CC=C(Cl)C=C1C(F)(F)F HSMVPDGQOIQYSR-KGENOOAVSA-N 0.000 description 1
- RVKCCVTVZORVGD-UHFFFAOYSA-N trinexapac-ethyl Chemical group O=C1CC(C(=O)OCC)CC(=O)C1=C(O)C1CC1 RVKCCVTVZORVGD-UHFFFAOYSA-N 0.000 description 1
- LESVOLZBIFDZGS-UHFFFAOYSA-N vamidothion Chemical compound CNC(=O)C(C)SCCSP(=O)(OC)OC LESVOLZBIFDZGS-UHFFFAOYSA-N 0.000 description 1
- 239000004562 water dispersible granule Substances 0.000 description 1
- WCJYTPVNMWIZCG-UHFFFAOYSA-N xylylcarb Chemical compound CNC(=O)OC1=CC=C(C)C(C)=C1 WCJYTPVNMWIZCG-UHFFFAOYSA-N 0.000 description 1
Abstract
An agrochemical composition comprising at least one low melting active ingredient; at least one moisture sensitive active ingredient; and an additive, characterised in that said additive has a softening point or melting point lower than the melting point of said low melting active ingredient; a process for the preparation thereof, a method of use thereof and a kit comprising the same is disclosed.
Description
A STABLE AGROCHEMICAL COMPOSITION AND PROCESS THEREOF
FIELD OF THE INVENTION
The présent invention relates to a stable agrochemical composition. The présent invention more particularly relates to stable agrochemical composition comprising a low melting active ingrédient and a moisture sensitive active ingrédient.
BACKGROUND AND THE PRIOR ART
Physically compatible agrochemical mixtures exhibit better pest management. These mixtures show multifaceted advantages than when applied individually. But achieving physical compatibility becomes major challenge while combining two or more agrochemicals. The problem of physical compatibility further aggravâtes when low melting active ingrédient needs to be formulated with another active ingrédient.
Some of the low melting active ingrédients like pyrethroids (synthetic pyrethrins) are known to control agricultural insect pests on crops. Pyrethroids interfère with the ionic conductance of nerve members by prolonging the sodium current. This stimulate nerves to discharge repeatedly causing hyper-excitability in poisoned animais.
Active ingrédients having pest control ability selected from fungicides such as strobilurins and insecticides such as organophosphates are advantageous to be co-formulated with low melting actives for better pest management. Some of these active ingrédients are moisture sensitive and thus rapidly dégradé while processing into a suitable formulation or composition.
Moisture sensitive active ingrédient, such as Acephate (organophosphate) is a systemic and contact insecticide of moderate persistence with residual activity lasting about 10-15 days. Acephate, being highly prone to moisture and is not very stable in conventional pesticidal formulations, such that a vigorous décomposition of acephate in conventional formulations takes place depending on storage conditions and, as a resuit, the insecticidal activity of acephate sometimes cannot be fully utilized.
Though it is advantageous to co-formulate moisture sensitive active ingrédients with low melting active ingrédients for better pest management, it is challenging to 5 develop stable as well as efficacious formulation.
There are large number of low melting active ingrédient formulations that are being used for combating pest attacks on plants. Available formulations include émulsion concentrâtes (EC), aqueous émulsion (ES). But, these formulations cannot be prepared when another active ingrédient is moisture sensitive and is prone to 10 water.
Dry granular formulations such as water dispersible granules of low melting active ingrédients like pyrethroids hâve been known and are in practice. The conventional ways of preparing granules include methods like extrusion granulation wherein a 15 dough is prepared using water which is then subjected to granulation. Another way of preparing the granules is to make a slurry in water and then subject it to spray drying.
When the low melting ingrédients like pyrethroids hâve to be combined in a pre20 mix with a moisture sensitive ingrédients like organophosphates, it becomes a challenge to do so as the moisture sensitive ingrédient cannot be granulated using water. Moreover, rise in température during extrusion granulation may melt low melting actives. Once granules are extruded and kept in ambient conditions, low melting actives become solid again. This solid-liquid-solid phase change resuit 25 into altered morphology leading to changed crystal form, or a layering of the ingrédient on the surface of the granules or the granules may become hard. This granular composition when applied in fields by way of dilution/ tank mixing yields unsatisfactory non-uniform dissolution (dispersion) of the composition with lack of homogeneity in the resulting mixture and prevents distribution of constant 30 concentration of the desired active in the fields. Lack of dispersion in desired manner will reduce the availability of the active ingrédient for the intended use as pesticide thereby making the product ineffective.
Another method which is employed for making a pre-mix of such ingrédients is to 5 dissolve the low melting ingrédient into suitable solvent and then mix it with the moisture sensitive ingrédient and then granulate. This method requires use of large amount of organic solvents which are not only expensive but are not environmentally friendly. The granules may hâve to be subjected to longer drying period in order to remove the traces of solvent from the final product.
WO2015142609 A1 discloses micro particles comprising water soluble organothiophosphate (e.g. Acephate) and pyrethroids (e.g. Bifenthrin). The invention présents effective odor control solution by adding odor-absorbing and odor-masking components.
US20090208423 discloses synergistic insecticidal composition comprising imidacloprid, lambda- cyhalothrin and a conventional agriculturally acceptable carrier or excipient formulated as an aqueous formulation or dry based formulations. The application also discloses a process of mixing the actives and 20 the excipients to obtain a homogenous mixture of ail ingrédients, which is micronized and granulated to yield the granular formulation. While this process is acceptable, micronizing the inert fillers in which liquid active is absorbed can pose several problems since the liquid naturally tends to corne out during fine grinding. Such compositions obtained do not generally exhibit good dispersibility and shelf 25 life especially since the low melting actives undergoes a phase change during the ambient storage températures (-5 to 50° C) leading to caking and crystal growth.
Indian Patent Application No. 1709/MUM/2010 discloses synergistic insecticidal composition of acephate and bifenthrin wherein bifenthrin technical dissolved in 30 solubilizer was sprayed onto the mixture of acephate technical and formulation auxiliaries to obtain granules. The problem with this method is large amount of solubilizer required by bifenthrin that imparts softness to the finished granules. In this case, high loading of active ingrédients is not possible due to undesirable softness of granules.
WO2002076213 A1 discloses a pesticidal composition comprising specified pyrethroids and organophosphates in a weight ratio of 50:1 to 1:5 wherein a pyrethroid is selected from deltamethrin, fenvalerate, esfenvalerate, cyfluthrin, beta-cyfluthrin and bifenthrin, and an organophosphate insecticide selected from triazophos, profenofos, chlorpyrifos-methyl, monocrotofos, acephate, 10 methamidophos and diethyl 1-phenyl-1 H-1,2,4-triazol-3-yl phosphate.
Although various efforts had been taken in the past to develop a stable pesticidal composition containing low melting active ingrédients and moisture sensitive active ingrédients, there is still a long felt need to develop an alternative, simple and an 15 efficient product and a process for developing the stable pesticidal compositions of these active ingrédients. Also, there is a need for developing such formulations, wherein the formulation overcomes drawbacks of the prior art and exhibits increased stability with respect to dégradation of moisture sensitive actives and dispersibility/suspensibility of low melting active ingrédient in combination. The 20 physical stability of the formulation during storage/use is a key problem in the art and the same is to be addressed.
OBJECTIVES
It is an objective of the invention to provide an agrochemical composition 25 comprising a low melting active ingrédient and a moisture sensitive active ingrédient.
Another objective of the invention to provide an agrochemical composition comprising a low melting active ingrédient and a moisture sensitive active ingrédient which is stable.
Another object of the présent invention is to provide methods of controlling pests using the compositions of the présent invention.
Yet another objective of the présent invention is to provide a non-dusty, free flowing, storage stable dry composition comprising at least one low melting active ingrédient and a moisture sensitive active ingrédient.
SUMMARY OF THE INVENTION
In accordance with the above objectives, the présent invention provides a stable agrochemical composition comprising:
a) at least one low melting active ingrédient;
b) at least one moisture sensitive active ingrédient; and
c) an additive;
characterised in that said additive has a softening point or melting point lower than the melting point of said low melting active ingrédient.
In accordance with the above objectives, the présent invention provides a process of preparing stable agrochemical composition comprising at least one low melting active ingrédient, at least one moisture sensitive active ingrédient and an additive wherein in the additive has a softening point or melting point lower than the melting point of said low melting active ingrédient.
In accordance with the above objectives, the présent invention provides use of stable compositions according to the présent invention as an agrochemical composition.
In accordance with the above objectives, the présent invention further provides a method of controlling unwanted pests, said method comprising applying an agrochemically effective amount of stable compositions according to the présent invention to the pests or to their locus.
β
Additional features and advantages ofthe présent invention will be apparent from the detailed description that follows, which illustrâtes by way of example, the most preferred features ofthe présent invention which are not to be construed as limiting the scope ofthe invention described herein.
DETAILED DESCRIPTION OF THE INVENTION
Inventors of the présent invention hâve surprisingly found that a stable agrochemical composition in the form a granular composition of a low melting active ingrédient and a moisture sensitive active ingrédient can be prepared by 10 mixing the low melting active ingrédient with a moisture sensitive active ingrédient in the presence of an additive and exposing the pre-mix to compact granulation.
It has been found out surprisingly that the additive used by the inventors prevents the low melting active ingrédient from undergoing crystal modifications or forming a crust on the granules. It is indeed surprising that the additive of the présent invention allows the storage ofthe product under any conditions and still maintain the quality of the product without any détérioration in the dispersibility, suspensibility and availability ofthe active.
It is an accepted method to test the formulation for long term stability and performance to allow the formulation to be kept at 54 degrees for 14 days called as accelerated heat stability (AHS) test and then test the dispersibility, suspensibility and wet sieve test. Drop in suspensibility and dispersibility indicate the poor performance of the formulation in the field after long term storage and 25 increase in wet sieve test indicate the formation of large particles which in the field will clog the nozzle.
It is observed by the inventors that the formulation of the présent invention passes ail the tests after AHS thereby proving its effectiveness in the field even after long 30 term storage. It is believed that the additive used during the process enables the formulation to remain stable for longer duration on storage.
As used herein the term ‘composition’ is used interchangeably with the term ‘formulation’ and is intended to refer to the stable solid dry flowable intended to prevent damage of agricultural crops and its produce from insects and pests.
Compounds are referred to herein as “low melting active ingrédient,” which is a term recognized in the relevant art, particularly in the field of agrochemical compositions. In particular, a low melting active compound according to the présent invention is a compound that has a melting point of less than about 100° C., less than about 90° C., less than about 85° C., less than about 80° C., less than about
75° C., or less than about 70° C or having ability to solidify on room température.
In certain embodiments, a low melting compound according to the invention is a compound with a melting point in the range of about 20° C. to about 100° C. In spécifie embodiments, a low melting compound is a compound that has a melting point in the range of about 25° C. to about 100° C., about 30° C. to about 100° C., about 30° C. to about 90° C., about 30° C. to about 80° C., about 30° C. to about 70° C., about 40° C. to about 90° C., about 40° C. to about 80° C., about 50° C. to about 90° C., about 50° C. to about 80° C., or about 50° C. to about 70° C.
The term ‘moisture sensitive active ingrédient refers to a compound having ability 20 to absorb moisture and undergoes dégradation or other changes in physicochemical parameters.
As used herein, the term “compaction granulation” dénotés a process of granulation wherein compositions comprising active ingrédients is separately, 25 sequentially or simultaneously subjected to compaction by applying pressure as well as to granulation by suitable mechanism such as extrusion.
As used herein, the term dégradation dénotés loss of the active ingrédient as a resuit of exposure to moisture/or on storage.
The term ‘softening point’ dénotés the température at which the additive reaches a spécifie degree of softness. The ‘softening point’ is close to but lower than the melting point of the additive.
The term locus as used herein refers to a place to which a combination according to the invention is applied. It includes application to an individual plant, a group of plants such as a plant and/or its surrounding, and thr» région in which plants may be planted as well application directly to an insect or insects and/or the vicinity in which they are located.
The term agrochemical in the context of this invention refers to any agent used to destroy insects, arachnids, fungi, unwanted végétation, rodents, and other pests.
The term insects includes ail organisms in the class Insecta. Insecticidal refers 15 to the ability of a substance to increase mortality or inhibit, growth rate of insects.
The term ‘plants’ refers to ail physical parts of a plant, including seeds, seedlings, saplings, roots, tubers, stems, stalks, foliage and fruits.
The term “agrochemically effective amount of active” refers to an amount of an active that kills or inhibits the plant disease for which control is desired, in an amount not significantly toxic to the plant being treated.
To “control” or “controlling” insects means to inhibit, through a toxic effect, the 25 ability of insect pests to survive, grow, feed, and/or reproduce, or to limit insectrelated damage or loss in crop plants. To “control” insects may or may not mean killing the insects, although it preferably means killing the insects.
The inventors of the présent invention hâve found that the addition of an additive 30 to a composition of a moisture sensitive active ingrédient, preferably an organophosphorus insecticide, and a low melting active ingrédient resulted in highly stable compositions. The stable composition achieved by addition of an additive facilitated granule formation in the absence of water. Thus, the présent invention provides for compositions that allows avoiding the use of water.
Without wishing to be bound by theory, the inventors in the présent invention hâve surprisingly found, that addition of a low softening or low melting additive to a combination of low melting active ingrédient such as pyrethroids and moisture sensitive active ingradients such as organophosphorus insecticide results in stable granular compositions.
Dry flowables or granules of the présent invention are easy to préparé and store, hâve good dispersibility and suspensibility under storage conditions. The use of an additive in obtaining said stable insecticidal composition without water, circumvents moisture responsible for dégradation of moisture sensitive active like acephate, and compaction below melting point of low-melting pyrethroids (i.e. 30-58 degree Celsius) avoids the cementing problem that occurs due to melting and graduai cooling during température variation in the process and on storage.
Thus, in an aspect, the présent invention may provide a stable agrochemical composition comprising:
a) at least one low melting active ingrédient;
b) at least one moisture sensitive active ingrédient; and
c) an additive;
characterised in that said additive has a softening point or melting point lower than the melting point of the low melting active ingrédient.
In another aspect, the présent invention may provide a stable insecticidal composition comprising:
a) at least one low melting pyrethroid;
b) at least one moisture sensitive insecticide; and
c) an additive;
characterised in that said additive has a softening point or melting point lower than the melting point ofthe low melting pyrethroid.
In an embodiment, the low melting active ingrédient of the présent invention may 5 be selected from insecticides, attractants, sterilants, bactéricides, acaracides, nematicides, fungicides, growth regulators, herbicides, fertilizers and mixtures.
In a preferred embodiment, the low melting active ingrédient of the présent invention is selected from insecticides, attractants, sterilants, bactéricides, 10 acaracides, nematicides, fungicides and growth regulators.
In an embodiment the low melting active ingrédient of the présent invention is selected from nitrothal-isopropyl, myclobutanil, piproctanyl bromide, jodfenphos, Imazalil, lambda-cyhalthrin, triflumizole, vamidothion, xylylcarb, tolclofos-methyl, 15 prothoate, pyriproxyfen, propamocarb hydrochloride, tefluthrin, resmethrin, chlorpropham, cloethocarb, demeton-S, cyfluthrin, cypermethrin, azinphos-ethyl, azinphos-methyl, benalaxyl, benazolin-ethyl, butocarboxim, benzoximate, bioresmethrin, bromopropylate, borax, biphenyl, fluoroglycofen-ethyl, fenbucarb, fenthiocarb, fensulfothion, fosmethilan, furalaxyl, dikegulac, trinexapac-ethyl, 20 ethiofencarb, etridiazole, fenamiphos, fenazaquin, EPN, dodemorph, , mecarphon, etaconazole, fluorbenside, furmecyclox, fenfluthrin, fluenetil, acequinocyl, schradan, transfluthrin, cyprodinil, phosfolan, crufomate, chlorphoxim, chloropropylate, di-allate, chlorofenprop, camphechlor, chlorbenside, chlordimeform, phosphonic acid, trifloxystrobin, picoxystrobin, gamma-cyhalothrin, 25 codlemone, spinetoram, cyflumetofen.
In an embodiment, the low melting active ingrédient of the présent invention is selected from strobilurins or pyrethroids.
The low melting pyrethroid may be selected from but not limited to cypermethrin, fenvalerate, permethrin, alphacypermethrin, betacypermethrin, zetacypermethrin, deltamethrin, cyfluthrin, bifenthrin, lambda-cyhalothrin, and/or bioresmethrin or mixtures thereof.
In another preferred embodiment of the présent invention, the low melting 5 pyrethroid is selected from bifenthrin, cypermethrin, alpha-cypermethrin, betacypermethrin, and zeta-cypermethrin.
Thus, in another preferred embodiment, the low melting pyrethroid may be bifenthrin.
In an embodiment, the low melting strobilurin may be selected from trifloxystrobin or picoxystrobin.
In an embodiment, the présent invention may provide a stable agrochemical 15 composition comprising from about 0.1% to about 30% w/w and preferably from about 0.2% to about 20% w/w low melting pyrethroid, of the total weight of the stable agrochemical composition.
Another embodiment of the présent invention may provide a stable insecticidal 20 composition comprising from about 0.1% to about 30% w/w and preferably from about 0.2% to about 20% w/w low melting pyrethroid, of the total weight of the stable insecticidal composition.
In a preferred embodiment of the présent invention, the stable insecticidal 25 composition comprises from about 1% to about 10% w/w low melting pyrethroid, of the total weight of the stable insecticidal composition.
In an embodiment, the moisture sensitive active ingrédient présent within the compositions may be selected from organophosphorus insecticides.
In an embodiment, the moisture sensitive organophosphorus insecticide may be selected from but not limited to acephate, azinphos-Methyl, carbofuran, chlorpyrifos, coumaphos, crufomate, dimethoate, ethoprop, famphur, fenamiphos, isofenfos, methamidophos, methidathion, methyl parathion, mevinphos, monocrotophos, metam sodium, phosalone, phosmet, phosphamidon, profenofos, TEPP, terbufos, tetrachlorvinphos, trichlorfon and combinations thereof.
The preferred organophosphorus insecticide may be selected from acephate, profenophos, phosphomidon or mixtures thereof.
Accordingly, an embodiment of the présent invention may provide a stable insecticidal composition comprising from about 0.5% to about 95% w/w and preferably from about 10% to about 85% w/w organophosphorus insecticide of the total weight of the stable insecticidal composition.
In a preferred embodiment of the présent invention, the stable insecticidal composition comprises from about 40% to about 85% w/w organophosphorus insecticide of the total weight of the stable insecticidal composition
In an embodiment, the présent invention comprises an additive that has a softening point or melting point lower than the melting point of the low melting active ingrédient.
In another embodiment the présent invention comprises an additive that has a melting point lower than the melting point of the low melting active ingrédient.
In an embodiment the softening point of the additive is lower than its melting point of the low melting active ingrédient.
In a preferred embodiment, the présent invention comprises an additive that is water soluble.
In an embodiment, the additive ofthe présent invention may be selected from but not limited to polyethylene glycol (PEG) 6000, PEG 4000, PEG 8000, Nonyl phénol
EO or high molecular weight ethoxylate or propoxylate of fatty acid, fatty acid alcohol, vegetable oils, polyvinyl alcohols, polyacrylates, starch, carboxymethyl cellulose, alginic acid, agar, gum arabic and xanthan gum.
In another embodiment, the additive of the présent invention may be preferably selected from polyethylene glycol (PEG) 6000, PEG 4000, PEG 8000, vegetable oils, and cellulose ethers.
In a preferred embodiment, the additive of the présent invention may be selected 10 from polyethylene glycols.
In an embodiment, in the compositions according to the présent invention, the additive is présent in an amount from about 1% to about 30% by weight of the composition. Preferably the additive is présent in an amount from about 3% to 15 about 20% by weight of the formulation.
The stable insecticidal compositions of the présent invention may further comprise one or more dispersants, wetting agents, fillers, surfactants, anticaking agents, pHregulating agents, preservatives, biocides, antifoaming agents, colorants and other formulation aids.
The dispersants may be selected from ionic and nonionic dispersants to enable disintegration of granules in water with ease, such as salts of polystyrène sulphonic acids, salts of polyvinylsulphonic acids, salts of naphthalenesulphonic acid/formaldehyde condensâtes, salts of condensâtes of naphthalenesulphonic 25 acid, phenolsulphonic acid and formaldéhyde, and salts of lignosulphonic acid, polyethylene oxide/polypropylene oxide block copolymers, polyethylene glycol ethers of linear alcohols, reaction products of fatty acids with ethylene oxide and/or propylene oxide, furthermore polyvinyl alcohol, polyvinylpyrrolidone, copolymers of polyvinyl alcohol and polyvinylpyrrolidone and copolymers of (meth)acrylic acid 30 and (meth)acrylic esters, furthermore alkyl ethoxylates and alkylarylethoxylates ethoxylated alkylarylphosphated and sulphated ester. The preferred dispersing agents include dérivative of ethoxylates of vegetable oil or a mixture of one or more of these; or styrene acrylic polymers or mixtures thereof.
The wetting agents may be selected from soaps; salts of aliphatic monoesters of sulphuric acid including but not limited to sodium lauryl sulphate; sulfoakylamides and salts thereof including but not limited to N-methyl-N-oleoyltaurate Na sait; akylarylsulfonates including but not limited to akylbenzenesulfonates; akylnaphthalenesulfonates and salts thereof and salts of ligninsulfonic acid.
In an embodiment fillers may be selected from insoluble fillers and soluble fillers.
In an embodiment, fillers may be selected preferably from precipitated silica and diatomaceous earth kaolin.
In an embodiment, it is preferred to préparé the insecticidal composition according to the invention as Dry Flowables (DF).
In an embodiment, suitable antifoams may, preferably be, silicones, long-chain alcohols and salts of fatty acids.
Suitable colorants (for example in red, blue and green) are, preferably, pigments, which are sparingly soluble in water, and dyes, which are water-soluble. Examples are inorganic coloring agents (for example iron oxide, titanium oxide, and iron hexacyanoferrate) and organic coloring agents (for example alizarin, azo and phthalocyanin coloring agents).
According to a preferred embodiment, the présent invention may provide stable insecticidal compositions comprising acephate, bifenthrin and an additive that has a softening point or melting point lower than the melting point of the low melting active ingrédient.
According to spécifie embodiments a stable insecticidal composition of the présent invention may comprise from about 0.5% to about 95% w/w of acephate, from about 0.1 % to about 30% w/w of bifenthrin, from about 1.0% to about 30% w/w of an additive that has a softening point or melting point lower than the melting point of the low melting active ingrédient.
According to another spécifie embodiment, a stable insecticidal composition of the présent invention may comprise from about 5.0 % to about 80% w/w of acephate, from about 1.0% to about 20% w/w of bifenthrin, from about 5.0% to about 20% w/w of PEG 6000 as the additive.
According to an embodiment of the présent invention, there is provided a stable agrochemical composition comprising acephate, trifloxystrobin and an additive that has a softening point or melting point lower than the melting point of the low melting active ingrédient.
According to spécifie embodiments a stable agrochemical composition of the présent invention may comprise from about 0.5% to about 95% w/w of acephate, from about 0.1% to about 30% w/w of trifloxystrobin, from about 1.0% to about 30% w/w of an additive that has a softening point or melting point lower than the melting point of the low melting active ingrédient.
In another embodiment, the présent invention provides a process for the preparing a stable agrochemical composition. The process comprises:
1) premixing at least one low melting active ingrédient, at least one moisture sensitive active ingrédient and an additive wherein the additive has a softening point or melting point lower than the melting point of the low melting active ingrédient; and
2) subjecting the premix to compaction granulation.
In an embodiment, the process of the présent invention comprises additional conventional steps, which may be necessary but not crucial to achieve the advantages of the présent invention.
According to another embodiment of the présent invention, in process for preparing the stable agrochemical composition, compaction granulation may take place in such a way that composition may be separately, sequentially or simultaneously subjected to compaction as well as to granulation.
In an embodiment, the présent invention provides a process for the preparing a stable agrochemical composition. The process comprises:
1) premixing at least one low melting active ingrédient, at least one moisture sensitive active ingrédient and an additive wherein the additive has a softening point or melting point lower than the melting point of the low melting active ingrédient; and
2) subjecting separately, sequentially or simultaneously, the premix to compaction as well as to granulation.
In a preferred embodiment, the process for préparation of the stable insecticidal composition comprise the following steps:
1) mixing an active ingrédient selected from at least one low-melting pyrethroid with required quantity of a precipitated silica to obtain a premix;
2) milling the premix with or without other additives in the air-jet mill to obtain grounded low-melting pyrethroid of desired particle size;
3) adding to the grounded milled low-melting pyrethroid, organophosphorus active ingrédient, and an additive wherein the additive has a softening point or melting point lower than the melting point of the low melting active ingrédient and any other necessary additive(s) and mixing it to obtain a premix;
4) subjecting the premix to compaction granulation to obtain the granules.
The granules, thus obtained, are preferably tested for required quality spécifications. Once the granules pass quality spécification, they are preferably filled and packed in desired packing as dry flowables.
The premix of the iow melting active ingrédient and the moisture sensitive active ingrédient and the additive can also be treated by pre-compaction followed by roller extrusion. This premixing of the moisture sensitive active ingrédient and low melting active ingrédient with the additive prevents the moisture sensitive active ingrédient from deteriorating in the composition; and pre-compaction prevents 10 melting of low melting active ingrédients during extrusion process.
The composition of the présent invention enjoy ail the advantages discussed above, making it bénéficiai from an économie aspect and a handling aspect and shows a very good performance during application. As will be demonstrated in the 15 examples, the composition of the présent invention demonstrates good suspensibility, stability, dispersibility, and free flowability and passes the wet sieve test.
According to an embodiment, the présent invention provides use of stable 20 agrochemical composition comprising at least one low melting active ingrédient, at least one moisture sensitive active ingrédient and an additive wherein the additive has a softening point or melting point lower than the melting point of the low melting active ingrédient, as an agrochemically active composition.
In an embodiment, the stable compositions according to the présent invention are used as insecticides.
Accordingly, the stable insecticidal compositions of the présent invention give a quick knockdown kill ofthe pests. It is especially a potent léthal weapon to kill hard30 to-kill, especially Lepidoptera, Coleoptra, Diptera, Hemiptera, preferably, effective against crop insects like leps, stink bug and plant bug.
In an embodiment, the crops on which the compositions of the présent invention may be used may be selected from but not limited to cereals, such as wheat, oats, barley, spelt, triticale, rye, maize, millet, rice, crops such as sugarcane, soybean, sunflower, râpe, canola, tobacco, sugar beet, fodder beet; tuber crops such as 5 potatoes, sweet potatoes etc., crops such as asparagus, hops etc.,; fruit plants such as apples, pears, stone-fruits such as for example peaches, nectarines, cherries, plums, apricots, citrus fruits such as oranges, grapefruit, limes, lemons, kumquats, mandarins, satsumas; nuts such as pistachios, almonds, walnuts, pecan nuts, tropical fruits such as mango, papaya, pineapple, dates, bananas etc., 10 grapes, vegetables such as endives, lambs, lettuce, fennel, globe and loose-leaf salad, chard, spinach, chicory, cauliflower, broccoli, Chinese cabbage, kale (winter kale or curly kale), kohlrabi, Brussel sprouts, red cabbage, white cabbage and savoy, fruiting vegetables such as aubergines, cucumbers, paprika, marrow, tomatoes, courgettes, sweetcorn, root vegetables such as celeriac, turnip, carrots, 15 swedes, radishes, horse radish, beetroot, salsify, celery, puises such as peas, beans etc., bulb vegetables such as leeks, onions etc., oil crops such as mustard, poppy, olives, sunflowers, coconut, castor oil plants, cocoa beans, groundnuts; fibre crops such as cotton, jute, flex, hemp, crops such as tea, coffee, rubber, ornamentals including shrubs and flowering plants, vines, rangeland and pastures.
In an embodiment, compositions of the présent invention may be optionally mixed together with other insecticides, attractants, sterilants, bactéricides, acaricides, nematicides, fungicides, growth regulators, herbicides, fertilizers and mixtures thereof.
In an embodiment, the présent invention provides a method of controlling unwanted pests, said method comprising applying stable compositions according to the présent invention to the pests or to their locus.
Thus, in an embodiment, the présent invention may provide methods of controlling insect pests at a locus, said method comprising application of an insecticidally effective amount of a compositions comprising:
a) at least one low melting pyrethroid;
b) at least one moisture sensitive organophosphorus insecticide; and c) an additive;
characterised in that said additive has a softening point or melting point lower than the melting point ofthe low melting pyrethroid.
In an embodiment, the présent invention may provide methods of controlling insect pest such as those belonging to Lepidopteran, Coleoptran, Dipteran, Hemipteran classes of insecticides.
In another aspect, the présent invention provides a kit. The kit comprises a plurality of components, each of which components may include at least one, or more, of the ingrédients of the compositions ofthe présent invention.
In an embodiment, the components ofthe kit may be admixed just prior to being used in any ofthe methods of use thereof described in this invention.
In an embodiment, the kit comprises an instruction manual that instructs a user of the kit to admix the components in the predefined quantities or in their predefined proportion prior to being used.
In an embodiment, the instruction manual directs the user of the kit to use the composition against predefined insects on certain predefined crops.
Accordingly, in an embodiment, the présent invention provides a kit comprising:
(a) at least one low melting active ingrédient component;
(b) at least one moisture sensitive active ingrédient component; and (c) an additive component, characterised in that said additive has a softening point or melting point lower than the melting point of said low melting active ingrédient.
In another embodiment, the présent invention provides a kit comprising:
(a) at least one low melting pyrethroid component;
(b) at least one moisture sensitive insecticide component; and (c) an additive component, characterised in that said additive has a softening point or melting point lower than the melting point of the low melting pyrethroid.
In an embodiment, the low melting active ingrédient component of the présent invention comprises strobilurins or pyrethroids.
The low melting pyrethroid may be selected from but not limited to cypermethrin, fenvalerate, permethrin, alphacypermethrin, betacypermethrin, zetacypermethrin, deltamethrin, cyfluthrin, bifenthrin, lambda-cyhalothrin, and/or bioresmethrin or mixtures thereof.
In another preferred embodiment of the présent invention, the low melting pyrethroid is selected from bifenthrin, cypermethrin, alpha-cypermethrin, betacypermethrin, and zeta-cypermethrin.
Thus, in another preferred embodiment, the low melting pyrethroid may be bifenthrin.
In an embodiment, the low melting strobilurin may be selected from trifloxystrobin or picoxystrobin.
In an embodiment, the kit comprises instructions manual instructing the userto use from about 0.1% to about 30% w/w of the low melting pyrethroid component.
In an embodiment, the kit comprises the moisture sensitive active ingrédient component selected from organophosphorus insecticides.
In an embodiment, the kit comprises an instruction manual instructing the user to use from about 0.5% to about 95% w/w of the organophosphorus insecticide component.
In an embodiment, the kit comprises an additive component, wherein the additive is selected from polyethylene glycol (PEG) 6000, PEG 4000, PEG 8000, Nonyl phénol 30 EO or high molecular weight ethoxylate or propoxylate of fatty acid, fatty acid alcohol, vegetable oils, polyvinyl alcohols, polyacrylates, starch, carboxymethyl cellulose, alginic acid, agar, gum arabic and xanthan gum.
In an embodiment, the kit comprises an instructions manual instructing the userto mix from about 1 % to about 30% of the additive component.
According to a preferred embodiment, the présent invention may provide a kit 15 comprising an acephate component, a bifenthrin component and an additive component that has a softening point or melting point lower than the melting point of bifenthrin.
According to another preferred embodiment, the présent invention provides a kit 20 comprising an instructions manual instructing the user to admix from about 0.5% to about 95% w/w of the acephate component, from about 0.1 % to about 30% w/w of bifenthrin component, and from about 1.0% to about 30% w/w of an additive that has a softening point or melting point lower than the melting point of bifenthrin.
According to another spécifie embodiment, the présent invention provides a kit comprising acephate component instructed to be used from about 5.0 % to about 80% w/w, bifenthrin component instructed to be used from about 1.0% to about 20% w/w, and PEG 6000 component instructed to be used from about 5.0% to about 20% w/w.
In an embodiment, the kit comprises acephate component, trifloxystrobin component and an additive component that has a softening point or melting point lower than that of trifloxystrobin.
In an embodiment, the kit comprises instructions for admixing from about 0.5% to about 95% w/w ofthe acephate component, from about0.1% to about 30% w/w of trifloxystrobin component, and from about 1.0% to about 30% w/w of the additive component, wherein the additive has a softening point or melting point lower than the melting point of trifloxystrobin.
In an embodiment, the kit comprises instructions for use of the components of kit as insecticide or a fungicide.
In an embodiment, the kit comprises instructions for use of the components against 15 Lepidoptera, Coleoptra, Diptera, Hemiptera, preferably against leps, stink bug and plant bug.
In an embodiment, the kit comprises instructions for use ofthe components in crops selected from cereals, such as wheat, oats, barley, spelt, triticale, rye, maize, millet, rice, crops such as sugarcane, soybean, sunflower, râpe, canola, tobacco, sugar 20 beet, fodder beet; tuber crops such as potatoes, sweet potatoes etc., crops such as asparagus, hops etc.,; fruit plants such as apples, pears, stone-fruits such as for example peaches, nectarines, cherries, plums, apricots, citrus fruits such as oranges, grapefruit, limes, lemons, kumquats, mandarins, satsumas; nuts such as pistachios, almonds, walnuts, pecan nuts, tropical fruits such as mango, papaya, 25 pineapple, dates, bananas etc., grapes, vegetables such as endives, lambs, lettuce, fennel, globe and loose-leaf salad, chard, spinach, chicory, cauliflower, broccoli, Chinese cabbage, kale (winter kale or curly kale), kohlrabi, Brussel sprouts, red cabbage, white cabbage and savoy, fruiting vegetables such as aubergines, cucumbers, paprika, marrow, tomatoes, courgettes, sweetcorn, root 30 vegetables such as celeriac, turnip, carrots, swedes, radishes, horse radish, beetroot, salsify, celery, puises such as peas, beans etc., bulb vegetables such as leeks, onions etc., oil crops such as mustard, poppy, olives, sunflowers, coconut, castor oil plants, cocoa beans, groundnuts; fibre crops such as cotton, jute, flex, hemp, crops such as tea, coffee, rubber, ornamentals including shrubs and flowering plants, vines, rangeland and pastures.
Inventors of the présent invention succeeded in preparing stable composition by careful combination of the at least one moisture sensitive active ingrédient, at least one low-melting active ingrédient and an additive wherein the additive has a softening point or melting point lower than the melting point of the low melting active 10 ingrédient and process of preparing the same. The optimum concentration of the actives as well as formulation ingrédients which led to the stable DF formulation has been arrived at by the experiments as exemplified below.
These examples are merely illustrations and are not to be understood as limiting 15 the scope and underlying principles of the invention in any way. Indeed, various modifications of the invention in addition to those shown and described herein will become apparent to those skilled in the art from the following examples and foregoing description.
While foregoing written description of the invention enables one of ordinary skill to make and use what is considered presently to be the best mode thereof, those of ordinary skill will understand and appreciate the existence of variations, combinations, and équivalents of the spécifie embodiment, method, and examples herein. The invention should therefore not be limited by the above described 25 embodiment, method, and examples, but by ail embodiments and methods within the scope and spirit of the invention.
EXPERIMENTAL EXAMPLES:
The following examples illustrate the basic methodology and versatility of the invention.
Example 1: 74% w/w Acephate and 6% w/w Bifenthrin DF was prepared as follows:
Ingrédients | Quantity (g) |
Acephate | 76.02 |
Bifenthrin | 6.63 |
Castor oil ethoxylate | 4 |
PEG-6000 | 11.50 |
Precipitated silica (PPT silica) | 1.85 |
Total | 100.00 |
Procedure: Bifenthrin technical was mixed with precipitated silica to préparé bifenthrin premix. The bifenthrin premix was milled in airjet mill to obtain desired particle size. Acephate, castor oil ethoxylate, PEG-6000 and precipitated silica were added to the bifenthrin premix to obtain bifenthrin-acephate premix. Bifenthrin-acephate premix was then subjected to compaction granulation by passing said premix through roller extruder to get the granules by multiple passing below melting point of bifenthrin.
.0
Example 2: 74% w/w Acephate and 6% w/w Bifenthrin DF was prepared as follows:
Ingrédients | Quantity (g) |
Acephate | 76.02 |
Bifenthrin | 6.63 |
Metasperse 550S | 3.00 |
Castor oil ethoxylate | 2.5 |
Dialkyl naphthalene sulphonate sodium sait | 1.00 |
PEG-6000 | 9.00 |
PPT silica | 1.85 |
Total | 100.00 |
Procedure: Bifenthrin was mixed with silica to préparé bifenthrin premix. The 15 premix was milled in airjet mill to obtain desired particle size. Acephate,
Metasperse 550S, Castor oil ethoxylate, Dialkyl naphthalene sulphonate sodium sait PEG 6000 and precipitated silica were added to the bifenthrin premix to obtain bifenthrin-acephate premix. Bifenthrin-acephate premix was then subjected to
compaction granulation by passing said premix through roller extruder to get the granules by multiple passing below melting point of bifenthrin.
Example 3: 74% w/w Acephate and 6% w/w Bifenthrin DF was prepared as 5 follows:
Ingrédients | Quantity (g) |
Acephate | 76.02 |
Bifenthrin | 6.53 |
Metasperse 550S | 3.00 |
Dialkyl naphthalene sulphonate sodium sait | 1.00 |
PEG-8000 | 13.10 |
PPT silica | 0.35 |
Total | 100.00 |
Procedure: Bifenthrin was mixed with silica to préparé bifenthrin premix. The bifenthrin premix was milled in airjet mill to obtain desired particle size. Acephate, Metasperse 550S, Dialkyl naphthalene sulphonate sodium sait, PEG 8000 and 10 precipitated silica were added to the bifenthrin premix to obtain bifenthrin-acephate premix. Bifenthrin-acephate premix was then subjected to compaction granulation by passing said premix through roller extruder to get the granules by multiple passing below melting point of bifenthrin.
Example 4: 74%w/w Acephate and 6% w/w Beta-cypermethrin DF was prepared as follows:
Ingrédients | Quantity (g) |
Acephate | 76.02 |
Beta-cypermethrin | 6.53 |
Metasperse 550S | 3.00 |
Dialkyl naphthalene sulphonate sodium sait | 2.00 |
PEG-4000 | 9.00 |
Ammonium sulphate | 3.10 |
PPT silica | 0.35 |
Total | 100.00 |
Procedure: Beta-cypermethrin was mixed with silica to préparé beta-cypermethrin premix. The beta-cypermethrin premix was milled in airjet mill to obtain desired particle size. Acephate, Metasperse 550S, Dialkyl naphthalene sulphonate sodium sait, PPT silica, Ammonium Sulphate and PEG 4000 were added to the beta5 cypermethrin premix to obtain beta-cypermethrin-acephate premix. Betacypermethrin-acephate premix was then subjected to compaction granulation by passing said premix through roller extruder to get the granules by multiple passing below melting point of bifenthrin.
Example 5: 74%w/w Acephate and 6.5% w/wTrifloxystrobin DF was prepared as follows:
Ingrédients | Quantity (g) |
Acephate | 76.02 |
trifloxystrobin | 7.04 |
Metasperse 550S | 3.00 |
Dialkyl naphthalene sulphonate sodium sait | 2.00 |
PEG-6000 | 9.00 |
ammonium sulphate | 2.59 |
PPT silica | 0.35 |
Total | 100.00 |
Procedure: Trifloxystrobin was mixed with silica to préparé Trifloxystrobin premix.
The trifloxystrobin premix was milled in airjet mill to obtain desired particle size. Acephate, Metasperse 550S, Dialkyl naphthalene sulphonate sodium sait, PPT silica, ammonium sulphate and PEG 6000 were added to the trifloxystrobin premix to obtain trifloxystrobin-acephate premix. Trifloxystrobin-acephate premix was then subjected to compaction granulation by passing said premix through roller extruder to get the granules.
STABILITY DATA
Test for Dispersibility
Compositions (Examples 6-10) according to the présent invention were tested for stability. The samples were prepared using varied quantifies of the active ingrédients and other ingrédients as listed in the below table (Table 1). The samples were prepared as per the process given in Example 1. The samples were 5 tested for dispersibility by observing the number of inversion required to achieve complété dispersion.
Table 1:
Ingrédients | Example 6 | Example 7 | Example 8 | Example 9 | Example 10 | Example 11 |
Ace p hâte | 76.02 | 76.02 | 76.02 | 76.02 | 76.02 | 76.02 |
Bifenthrin | 6.63 | 6.53 | 6.63 | 6.63 | 6.63 | 6.53 |
Additive* | 11.50 | 13.10 | 7.50 | 10.00 | 3.00 | 9.00 |
PPT silica | 1.85 | 0.35 | 2.85 | 1.85 | 3.85 | 0.35 |
Castor oil ethoxylate | 4.00 | 2.00 | 4.5 | - | ||
Soprophor4D384 | - | - | 3.00 | 2.00 | - | - |
Dialkyl naphthalen e sulphonate sodium sait | - | 1.00 | - | 1.50 | 1.00 | 2.00 |
Metasperse 550S | - | 3.00 | - | 3.00 | 3.00 | |
Ammonium sulfate | - | - | 4.0 | 2.00 | 3.10 | |
No. of Inversions | 15 | 13 | 12 | 13 | 12 | 12 |
*the additive is selected from PEG 6000, PEG 4000 and PEG 8000
Number of inversion required to achieve complété dispersion of the granules was io determined by the following procedure: A graduated cylinder of 250 ml was taken and 2 gm sample was added to the cylinder. It was allowed to soak for 2 min. The graduated cylinder was then closed by putting stopper and tilted to 180 °C and brought back to the original position in 2 seconds.
It was observed that the compositions of the présent invention achieved good dispersion in approx. 12-15 inversions and is highly suitable for storage.
Test for suspensibility and stability of the active ingrédient
The DF formulations prepared according to the présent invention were investigated for suspensibility, dégradation of active ingrédient as well as its effect on stability of the composition. Samples (Examples 7 and 11) were prepared as per Example 1.
The samples were kept at 54±2°C for up to 14 days and stability parameters such as suspensibility, wet sieve analysis and dégradation of active ingrédients were tested. The results are summarized in Table 2.
Table 2
Physico/chemical property | Example 7 | Example 11 | ||
0 days | 14 days | 0 days | 14 days | |
% Acephate | 74.35 | 72.77 | 74.42 | 71.55 |
% Bifenthrin | 6.18 | 6.07 | 6.22 | 6.13 |
Wet sieve analysis (rétention on 75 μ test sieve) | 0.02 | 0.1 | 0.002 | 0.003 |
No. of Inversions | 13 | 13 | 12 | 11 |
Suspensibility | 97 | 95 | 94 | 93 |
Availability of Bifenthrin | 5.99 | 5.77 | 5.85 | 5.71 |
As clear from Table 2, dégradation of active acephate and active bifenthrin in DF composition was not observed when kept at of 54±2°C for 14 days. There was no significant change in the suspensibility of the formulation, maintaining that the formulations according to the présent invention are stable according to the physicochemical parameters. This signifies that the DF or the granular composition of acephate and bifenthrin so obtained has not only excellent stability of the active ingrédients but also retains the dispersibility and hence the availability of the active ingrédients for the intended use. It is further established by the resuit of wet sieve analysis that the crystal modification of bifenthrin has been prevented. The combination of actives and excipients prepared according to the process disclosed in the présent invention leads to the stable DF composition which does not undergo any Chemical and physical changes on storage and is also easy to handle for further use.
A comparative sample (Example 12) was prepared without the additive of the présent invention for comparison purpose. The sample was tested for dispersibility by observing the number of inversion required to achieve complété dispersion.
Ingrédients | Example 12 |
Acephate | 76.02 |
Bifenthrin | 6.33 |
PEG-6000 | 0.00 |
PPT silica | 1.00 |
Castor oil ethoxylate | 0.00 |
Soprophor-4D384 | - |
Dialkyl naphthalene sulphonate sodium sait | 2.00 |
Metasperse 550S | 3.00 |
Ammonium sulfate | 11.65 |
No. of Inversions | >30 |
Wet sieve analysis (rétention on 75 μ test sieve) | 3.52% w/w |
Suspensibility | 45.8 % w/w(as bifenthrin) |
Availability of Bifenthrin | 45.8% of total active |
It has been observed that the sample (Example 12) prepared without an additive which has a softening point or melting point lower than the melting point of the low melting active ingrédient could not provide a good dispersion. Therefore the formulation failed in delivering the required dispersibility and resulted in an unstable 15 formulation.
Test for availability of bifenthrin for insecticidal activity
The DF formulations prepared according to the présent invention were further investigated for finding out the amount of bifenthrin remain available for acting as an insecticide. The suspensibility of a formulation can be directly extrapolated to the active ingrédient remain available for the intended use of the active ingrédient.
Formulations prepared according to the présent invention tested for suspensibility in comparison with formulations prepared without additives. The samples were prepared as per example 1 and kept at 54±2°C for 14 days and suspensibility was measured.
A review of table 3 given below reveals that, for examples 15-17 prepared 10 according to the présent invention, the suspensibility measured was unexpectedly high which obviously indicates that the formulation can be effectively used for the intended insecticidal activity. The % availability of bifenthrin achieved is same as that of the initial concentration of bifenthrin in the formulation. In the case of Examples 13-14 which were prepared without the additive, the measured 15 suspensibility was very low which indicates that the available bifenthrin is only about 50% of what is expected from those formulations.
Table 3: Availability of bifenthrin in the formulations
Examples | Acephate (g) | Bifenthrin (g) | Additive* (g) | Suspensibility of Bifenthrin | availability of Bifenthrin (g) |
Example13 | 76.0 | 6.6 | 0.0 | 58 | 3.83 |
Example14 | 76.0 | 6.6 | 0.0 | 52 | 3.43 |
Example15 | 76.0 | 6.6 | 1.5 | 95 | 6.27 |
Example16 | 76.0 | 6.5 | 12.0 | 96 | 6.24 |
Example17 | 78.0 | 5.5 | 2.5 | 94 | 5.17 |
*the additive is selected from PEG 6000, PEG 4000 and PEG 8000
Inventors of the présent invention thus successfully prepared formulation of a low 20 melting active ingrédient which is prone to undergo morphological changes along with a moisture sensitive agrochemical. The compositions according to the présent invention were found to be stable as well as efficacious for the intended use.
Claims (20)
1. An agrochemical composition comprising:
a) at least one low melting active ingrédient;
b) at least one moisture sensitive active ingrédient; and
c) an additive, characterised in that said additive has a softening point or melting point lower than the melting point of said low melting active ingrédient.
2. The agrochemical composition as claimed in claim 1 wherein said low melting active ingrédient is selected from pyrethroid insecticides and strobilurin fungicides.
3. The agrochemical composition as claimed in claim 1 wherein said low melting active ingrédient is selected from the group consisting of bifenthrin, cypermethrin, fenvalerate, permethrin, alphacypermethrin, betacypermethrin, zetacypermethrin, deltamethrin, cyfluthrin, lambdacyhalothrin, and bioresmethrin and mixtures thereof.
4. The agrochemical composition as claimed in claim 1 wherein said low melting active ingrédient is bifenthrin.
5. The agrochemical composition as claimed in claim 1 wherein said low melting active ingrédient is trifloxystrobin.
6. The agrochemical composition as claimed in claim 1 wherein said composition comprises from about 0.1% w/w to about 30% w/w of low melting active ingrédient of the total weight of the agrochemical composition.
7. The agrochemical composition as claimed in claim 1 wherein said moisture sensitive active ingrédient is selected from the group consisting of acephate, azinphos-methyl, carbofuran, chlorpyrifos, coumaphos, crufomate, dimethoate, ethoprop, famphur, fenamiphos, isofenfos, methamidophos, methidathion, methyl parathion, mevinphos, monocrotophos, metam sodium, phosalone, phosmet, phosphamidon, profenofos, TEPP, terbufos, tetrachlorvinphos, trichlorfon and combinations thereof.
8. The agrochemical composition as claimed in claim 1 wherein said moisture sensitive active ingrédient is acephate.
9. The agrochemical composition as claimed in claim 1 wherein said composition comprises from about 0.5% w/w to about 95% w/w of moisture sensitive active ingrédient of the total weight of the agrochemical composition.
10. The agrochemical composition as claimed in claim 1 wherein said additive is selected from the group consisting of polyethylene glycol (PEG) 6000, PEG 4000, PEG 8000, nonyl phénol 30 EO or high molecular weight ethoxylate or propoxylate of fatty acid, fatty acid alcohol, vegetable oils, polyvinyl alcohols, polyacrylates, starch, carboxymethyl cellulose, alginic acid, agar, gum arabic and xanthan gum.
11. The agrochemical composition as claimed in claim 1 wherein said additive is selected from the group comprising of Polyethylene Glycol (PEG) 6000, PEG 4000 and PEG 8000.
12. The agrochemical composition as claimed in claim 1 wherein said composition comprises from about 1% w/w to about 30% w/w of additive of the total weight of the agrochemical composition.
13. The agrochemical composition as claimed in claim 1 wherein said composition is formulated in the form of dry formulation Dry Flowable (DF).
14. A process for preparing a stable agrochemical composition wherein said process comprises:
(a) mixing at least one low melting active ingrédient, at least one moisture sensitive active ingrédient and an additive wherein said additive has a softening point or melting point lower than the melting point of the low melting active ingrédient to obtain a premix;
(b) optionally adding one or more performance enhancers to the premix; and (c) subjecting the premix to compaction granulation.
15 .The process as claimed in claim 14, wherein said subjecting the premix to compaction granulation comprises subjecting separately, sequentially or simultaneously, the premix to compaction as well as to granulation.
16 . The process as claimed in claim 14 comprising:
(a) mixing an active ingrédient selected from at least one low-melting pyrethroid with required quantity of a precipitated silica to obtain a premix;
(b) milling the premix with or without other additives in the air-jet mill to obtain grounded low-melting pyrethroid of desired particle size;
(c) adding to the grounded milled low-melting pyrethroid, organophosphorus active ingrédient, and an additive wherein said additive has a softening point or melting point lower than the melting point of the low melting active ingrédient and any other necessary additive(s) and mixing it to obtain a premix;
(d) subjecting the premix to compaction granulation to obtain the granules.
17 .A method of controlling pests, said method comprising applying an agrochemical composition to insect pests at a locus, said agrochemical composition comprising:
a) at least one low melting active ingrédient;
b) at least one moisture sensitive active ingrédient; and
c) an additive, characterised in that said additive has a softening point or melting point lower than the melting point of said low melting active ingrédient.
18. The method as claimed in claim 17 wherein said agrochemical composition is applied to control insect pests at a locus, said insect pests being selected from Lepidopteran, Coleoptran, Dipteran, and Hemipteran classes of insecticides.
19. A kit comprising:
(a) at least one low melting active ingrédient component;
(b) at least one moisture sensitive active ingrédient component; and (c) an additive component, characterised in that said additive has a softening point or melting point lower than the melting point of said low melting active ingrédient.
20. A kit comprising acephate component instructed to be used from about 5.0 % to about 80% w/w, bifenthrin component instructed to be used from about 1.0% to about 20% w/w, and PEG 6000 component instructed to be used from about 5.0% to about 20% w/w.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IN201731018461 | 2017-05-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
OA19681A true OA19681A (en) | 2020-12-31 |
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