CS239198B1 - Combined herbicide's stable water suspension production method - Google Patents
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Abstract
Predmetom vynálezu je sposob výroby kombinovaného herbicídneho přípravku vo vodnej suspenzie na báze 2-metyl-4-chlór- -fenoxyoctovej kyseliny a N,N‘-dimetyl-N‘- - (4-izopropylfenyl)-močoviny. Prípravok obsahuje jednu účinnú látku (MCPAj rozpuštěnu vo vodě a do tohto roztoku sa druhá účinná látka (izoproturon), ktorá je nerozpustná vo vodě, stabilizuje prostredníctvom povrchovoaktívnych látok, polysacharidu, etylénglykolu a dimetylformamidu na stabllnú vodnú suspenziu.The subject of the invention is a method of production of the combined herbicidal formulation in aqueous suspension based on 2-methyl-4-chloro- -phenoxyacetic acid and N, N‘-dimethyl-N‘- - (4-isopropylphenyl) urea. The preparation contains one active substance (MCPAi dissolved in water and into this solution the second active ingredient (isoproturon), which is insoluble in water, stabilizes via surfactants, polysaccharide, ethylene glycol and dimethylformamide to a stable aqueous suspension.
Description
Vynález sa týká výroby herbicidnej suspenzie.The invention relates to the production of a herbicidal suspension.
Podlá dosia! známého i zaužívaného sposobu výroby sa 2-metylfenoxyoctová kyselina (ΜΌΡΑ) upravuje do formy herbicídneho přípravku ako sodná, draselná alebo dimetylamlnová sol', rozpustná vo vodě. Tieto roztoky sa používajú ako herbicídne prostriedky.According to dosia! In the known and well-established process, 2-methylphenoxyacetic acid (ΜΌΡΑ) is formulated as a water-soluble sodium, potassium or dimethylamine salt. These solutions are used as herbicidal compositions.
N,N‘-dimetyl-N-(4-izopropylf enyl}-močovina sa upravuje do formy herbicídneho přípravku ako zmáčatetný prášolt alebo vodná suspenzia.The N, N‘-dimethyl-N- (4-isopropylphenyl) -urea is formulated as a herbicidal preparation as a wettable powder or an aqueous suspension.
Použitie kombinácie účinných látok v ροϊnohospodárstve si žiada následné aplikácie roztoku soli MCPA a druhů aplikáciu herbicídneho přípravku izoproturom (N,N‘-.dimetyl-N‘-(4-izopropylf enyl)-močoviny.The use of the active ingredient combination in agriculture requires subsequent application of the MCPA salt solution and the species by application of the herbicidal product with isoproture (N, N‘-dimethyl-N‘- (4-isopropylphenyl) -urea).
Nevýhodou dosia! využívaného postupu výroby je nutnost následnej aplikácie jednotlivých prípravkov. Ďalšou nevýhodou je manipulácia s pesticídnymi práškami.The disadvantage of dosia! The manufacturing process used is the necessity of subsequent application of individual preparations. Another disadvantage is the handling of pesticidal powders.
Zistili sme, že je možné připravit lierbicídny prípravok na báze MCPA a izoproturom vo· formě stabilnej vodnej suspenzie. Nová forma kombinovaného herbicídneho přípravku obsahuje jednu účinná látku (MCPA) rozpustná vo vodě a do tohto roztoku sa druhá účinná látka (izoproturon), ktorá je nerozpustná vo vodě, stabilizuje prostredníctvom povrchovoaktívnych látok, polysacharidu a dimetylformamidu na stabilnú vodná suspenziu.We have found that it is possible to prepare a lierbicidal formulation based on MCPA and isoproture in the form of a stable aqueous suspension. The new form of the combined herbicidal formulation contains one water-soluble active ingredient (MCPA) and into this solution the other water-insoluble active ingredient (isoproturon) is stabilized by means of surfactants, polysaccharide and dimethylformamide to a stable aqueous suspension.
Vynálezom je výroba kombinovaného herbicídneho· přípravku, obsahujúceho 2-metyl-fenoxyoctovú kyselinu (MCPA) a N,N‘-dimetyl-N‘- (4-izopropylf enyl j -močovinu. Pri jeho výrobě sa vychádza z vodného roztoku sodnej, draselnej, alebo dimetylamínovej soli 2-metyl-4-ichlórfenoxyoctovej kyseliny. Do 12 až 40 %-ného7 vodného roztoku soli MCPA sa za miešania přidá jemne zomiletá účinná látka N,N‘-dimetyl-N‘- (4-izopropylf enyl) -močovina a ďalej sa pridajú 0,1 až 5 % hmot. povrchovoaktívnych látok. Množstvo jemne zomletej účinnej látky sa volí tak, aby výsledný produkt obsahoval 5 až 40 % účinnej látky vo formě suspenzie. Po rozmiešaní sa može vzniknutá zmes premlieť mokrým mletím, čím sa dosiahne požadovaná jemnost.The present invention relates to the production of a combination herbicidal composition comprising 2-methylphenoxyacetic acid (MCPA) and N, N'-dimethyl-N '- (4-isopropylphenyl) urea, which is prepared from an aqueous solution of sodium, potassium, or a dimethylamine salt of 2-methyl-4-chlorophenoxyacetic acid To a 12-40% 7 aqueous MCPA salt solution is added a finely milled active ingredient N, N'-dimethyl-N '- (4-isopropylphenyl) -urea with stirring. The amount of finely divided active ingredient is selected such that the resulting product contains 5 to 40% active ingredient in the form of a suspension. reaches the desired fineness.
Ak je účinná látka v· pevnej fáze dostatočne jemne zomletá, stačí doplnit do vznlklej suspenzie stabilizujúce komponenty: polysacharid v množstve 0,1 až 5 % hmot. a 0,1 až 4 % formaldehydu vztahované na výsledný produkt.If the active substance is sufficiently finely ground in the solid phase, it is sufficient to add to the fluidized suspension the stabilizing components: polysaccharide in an amount of 0.1 to 5% by weight. and 0.1 to 4% formaldehyde based on the final product.
Po ukončení finalizácie sa suspenzia zriedi vodou a premelie mokrým mletím, čím sa súčasne zabezpečí i homogenizácia výrobku.When finalization is complete, the suspension is diluted with water and ground by wet grinding to ensure product homogenization.
Postup možno modifikovat tak, že do roztoku soli MCPA sa přidá N,N‘-dimetyl-N-(4-izopropylfenylj-močovina vo formě dispergovatelného prášku.The process can be modified by adding N, N‘-dimethyl-N- (4-isopropylphenyl) urea as a dispersible powder to the MCPA salt solution.
Ak všetky komponenty finalizácie sú požadovanej jemnosti, potom možno proces mletia vynechat.If all the components of the finalization are of the desired fineness, then the milling process can be omitted.
Je výhodné polysacharid predom rozpustit do formaldehydu a za miešania přidat před, alebo po· mletí.It is advantageous to dissolve the polysaccharide into formaldehyde in advance and add it before or after grinding with stirring.
Predmet vynálezu dokumentujú nasledujňce příklady prevedenia.The following examples illustrate the invention.
Příklad 1Example 1
Do trojhrdlej banky, ktorá dosahovala miešadlo a teploměr sa nadávkovalo 50 ml roztoku sodnej soli 2-metyl-4-chlórfenoxyoctovej kyseliny, obsahujúcej 32,3 % MCPA o čistotě 88,47 °/o, pričom pH roztoku bolo 7,8 a roztok obsahoval 8 θ/ο hmot. etylénglykolu. Za miešania sa přidalo 50 ml stabilnej vodnej suspenzie N,N‘-di,metyl-N‘-(4-izopropylénfenyl} -močoviny, obsahujúcej 25 g účinnej látky, 1,1 g neiónového tenzidu, ktorým je zmesný kopolymér propylénoxidu a etylénoxidu, 1,5 g etylénglykolu. Za miešania sa přidalo 0,25 g polysacharidu (Rodopolu) a 0,1 ml formaldehydu. Po· 40 minutách miešania sa získala vodná suspenzia, ktorej 1 % roztok mal 99,4 % stálost suspenzie po 30 minutách a 5 % roztok mal 98,6 % stálost suspenzie.50 ml of a 2-methyl-4-chlorophenoxyacetic acid sodium salt solution containing 32.3% MCPA of 88.47% purity was added to the three-necked flask reaching the stirrer and thermometer, the pH of the solution being 7.8 and the solution contained 8 θ / ο wt. ethylene glycol. 50 ml of a stable aqueous suspension of N, N'-di, methyl-N '- (4-isopropylenephenyl) -urea containing 25 g of the active ingredient, 1.1 g of a nonionic surfactant which is a mixed copolymer of propylene oxide and ethylene oxide, were added with stirring, 1.5 g of ethylene glycol 0.25 g of polysaccharide (Rodopol) and 0.1 ml of formaldehyde were added with stirring, and after 40 minutes of stirring, an aqueous suspension was obtained whose 1% solution had a 99.4% suspension stability after 30 minutes and The 5% solution had a 98.6% suspension stability.
Příklad 2 ml roztoku sodnej soli 2-metylfenoxyoctovej kyseliny obsahujúcej 20,1 ·% MCPA sa nadávkovalo do banky. Roztok sodnej soli MCPA bol připravený z technickej sodnej soli MCPA, ktorej čistota bola 88,47 %-ná, obsahovala 70,04 % MCPA, 1,94 °/o 2-metylfenoxyoctovú kyselinu, 4,5 % 2-metyl-6-chlór-fenoxyoctovú kyselinu a 2,75 % 2-metyl-4,l6-dichlórfenoxyoctovú kyselinu, rozpuštěním vo vodě na nasýtený roztok pri 5 °C.Example 2 ml of a 2-methylphenoxyacetic acid sodium salt solution containing 20.1% MCPA was dispensed into a flask. MCPA sodium salt solution was prepared from technical sodium salt of MCPA, which was 88.47% pure, contained 70.04% MCPA, 1.94% o-2-methylphenoxyacetic acid, 4.5% 2-methyl-6- chloro-phenoxyacetic acid acid and 2.75% 2-methyl-4, l 6-dichlorophenoxyacetic acid, dissolved in water to a saturated solution at 5 ° C.
Do uvedeného roztoku Na soli sa přidali 4 ml etylénglykolu, 0,5 ml formaldehydu a 1,3 g Rodopolu (polysacharidu). Ďalej sa do roztoku přidalo 20 ml vodnej suspenzie N,N‘-dimetyl-N‘- (4-izopropylf enyl) -močoviny pripravenej z 10 g účinnej látky a vody. Dálej sa’ přidalo 0,5 % hmot. neiónógéhneho tenzidu, ktorým je zmesný kopolymér propylénoxidu a etylénoxidu všeobecného vzorca:4 ml of ethylene glycol, 0.5 ml of formaldehyde and 1.3 g of Rodopol (polysaccharide) were added to said Na salt solution. Next, 20 ml of an aqueous suspension of N, N‘-dimethyl-N- (4-isopropylphenyl) urea prepared from 10 g of the active ingredient and water was added to the solution. Furthermore, 0.5 wt. a non-ionic surfactant which is a mixed copolymer of propylene oxide and ethylene oxide of the formula:
(C2H4O) x— (CsHsO j 4— (C2H4O) x—H, v· ktorom polyoxypropylénový retazec tvoří hydrofóbny a polyoxyetylénový retazec hydrofilnú časť molekuly. Ďalej sa přidalo 0,2 percenta hmot. neiónového emulgátora. Finálna zmes sa premlela mokrým mletím v mixéru s ballutinou.(C2H4O) x - (CsH5O4) - (C2H4O) x- H, wherein the polyoxypropylene chain forms the hydrophobic and polyoxyethylene chain hydrophilic portion of the molecule, and 0.2 percent by weight of a nonionic emulsifier was added. blender with ballutina.
Výsledný produkt po oddělení od skleněných guličiek, obsahoval požadovaný poměr účinných látok a 1 % roztok mal 99 % vodná suspenziu po 30 minútach.The resulting product, after separation from the glass beads, contained the desired ratio of active ingredients and the 1% solution had a 99% aqueous suspension after 30 minutes.
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CS841914A CS239198B1 (en) | 1984-03-16 | 1984-03-16 | Combined herbicide's stable water suspension production method |
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CS841914A CS239198B1 (en) | 1984-03-16 | 1984-03-16 | Combined herbicide's stable water suspension production method |
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CS239198B1 true CS239198B1 (en) | 1985-12-16 |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1070023C (en) * | 1998-06-05 | 2001-08-29 | 钱永康 | Isomethylxathion herbicide and preparation technology thereof |
CN103478156A (en) * | 2012-06-13 | 2014-01-01 | 钱永康 | MCPA (2-methyl-4-chloro-phenoxyacetic acid)-isoproturon herbicide and production method thereof |
-
1984
- 1984-03-16 CS CS841914A patent/CS239198B1/en unknown
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1070023C (en) * | 1998-06-05 | 2001-08-29 | 钱永康 | Isomethylxathion herbicide and preparation technology thereof |
CN103478156A (en) * | 2012-06-13 | 2014-01-01 | 钱永康 | MCPA (2-methyl-4-chloro-phenoxyacetic acid)-isoproturon herbicide and production method thereof |
CN103478156B (en) * | 2012-06-13 | 2015-11-25 | 钱永康 | 2 first Alon and manufacture methods thereof |
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Publication number | Publication date |
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CS191484A1 (en) | 1985-05-15 |
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