• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The method of weed control, including their treatment with an aqueous solution of linuron in the form of an emulsifying concentrate or in the form of an aqueous suspension concentrate at a dose of 0.060, 25 kg of active substance per hectare, characterized in that, in order to increase the herbicidal effect, fat soluble is added to the concentrate of linuron disaerator in the amount of 0.5-1.25 wt.% in the calculation of linuron.
    公开号:SU1079161A3
    申请号:SU802905250
    申请日:1980-04-11
    公开日:1984-03-07
    发明作者:Альбрехт Конрад；Френш Хайнц；Шумахер Ханс
    申请人:Хехст Аг (Фирма)；
    IPC主号:
    专利说明:


    The invention relates to agriculture, namely to the protection of plants against weeds with the help of chemicals. A known method of controlling weeds, including their treatment with an aqueous solution of linuron {3- (3.4 dichlorophenyl) -1-methyl-1-methoxyurea) in the form of an emulsifiable concentrate at a dose of 0.06-0.25 kg of active substance per 1 ha . Emulsifying concentrates are solutions of biologically active substances in solvents with the addition of appropriate emulsifiers, which, when diluted with water, emulsifiable concentrate ensure the formation of stable emulsions. The preparation of emulsifiable concentrates is carried out, for example, in stirred tank boilers. Linuron is characterized by good solubility in aromatic solvents that are used to prepare emulsifiable concentrates. In addition, conventional emulsifier mixtures which, with such linuromic solutions, form emulsifying concentrates, are used. When mixing emulsified concentrates of linuron in water, suspensive emulsions are formed, which are aqueous dispersions containing solid particles and thin droplets of solutions of biologically active substances, and they quickly form a linuron in the form of needles, 100250 microns in length, which fall out and sediment l. . Emulsion solutions for spraying or suspension emulsions are less effective than concentrated aqueous suspensions of wettable defects, since in linuron emulsions, the biologically active substance has a larger and more inhomogeneous distribution as a result of crystallization than in suspensions of wettable defects. In addition, linuron emulsifying concentrates, when mixed in water, spontaneously form linuron crystals, which grow to 250 microns in 0-1 min and do not provide a reliable biological effect, leading to clogging of spray nozzles and protective filters, as well as mixing the emulsion for spraying The formation of crystals is accelerated. The known method of controlling weeds is that they are treated with an aqueous solution of linuron in the form of an aqueous suspension concentrate at a dose of 0.060, 25 kg of active substance per hectare. Suspension concentrates are concentrated aqueous suspensions of finely ground and slightly soluble in water solid biologically active substances, the melting point of which should be higher. To obtain them, a coarse suspension of the biologically active substance, which contains the necessary auxiliary means for the preparation of ready-made forms, is pumped through a porous layer of small glass quartz or corundum balls in ball or sand mills, which is rotated using an agitating shaft in a steel cylinder. In this case, no dust is formed and the need for expensive dust-holding devices is eliminated. Grinding is carried out with water cooling. Known suspension concentrates have a fluid consistency, are non-flammable, and contain polycarboxylated hydrocarbon polymers, for example, salts of polyacrylic acids 2. However, when forming linuron with the above auxiliary suspending agents or c-known dispersants and wetting agents into the desired suspension concentrates, the stability of the products with increasing storage time at the storage temperature decreases to. Dispersions thicken, become dense, or non-dispersive precipitates of biologically active substances are released. When comparing the particle size distribution of freshly prepared dispersions with samples stored for 2-3 months at, in an initially well flowing concentrate of suspensions of linona ron due to the insoluble water solubility of the biologically active substance (80 ppm) at 2Q ° C. during storage, the recrystallization of fine linuron crystals into coarse ones occurs. Crystal growth, fixed on a microscopic photograph, is the cause of the instability of aqueous linuron dispersions, as the total surface and the number and size of linuron particles constantly change, so the amount and type of dispersant and wetting agent are carefully measured, taking into account the initially existing the number and surface of the particles in order in the case of highly concentrated suspensions of biologically active substances to obtain a flowable product. Aqueous dispersions that contain linuron in quantity. May 20-50 % and have a fineness of about 5 microns is shown after storage for 2 months with properly decorated crystals with a diameter of up to 70 microns and above. The biologically active substance is precipitated from the suspension in the form of a viscous, sometimes solid precipitate, the preparations are sealed to form pastes that can be cut off.
    The disadvantages of the known methods do not allow a sufficient herbicidal action.
    The purpose of the invention is to increase the herbicidal effect.
    This goal is achieved by adding a fat-soluble disazo dye to the concentrate of linuron in the amount of 0.05-1.25 May. based on linuron.
    Liquid, emulsifiable herbicidal concentrates containing linuron as a biologically active substance, contain wt.%:
    Linuron 10-25, -ketones 25-40, especially isophorone and / or cyclohexanone; aromatic solvents 60-18 (containing 35% by weight of saturated hydrocarbons under certain conditions), fat-soluble disazocorrels 0.05-2, and emulsifiers 4.9515.
    Liquid aqueous herbicidal suspension concentrates containing linuron as a biologically active substance, contain, wt%: linuron 20-50; Surfactant 2-20, adjuvant for suspension preparation 0-2; antifoam 0-2, liposoluble disazokrasiteli 0.05-2, antifreeze 0-4 and the rest is water.
    Fat-soluble disazocolates for stabilization, which consists in inhibiting crystallization, are used, for example, given in Color Index Third Edition, Vol. k (1971), jutlished disazo dyes.
    Preferred disazo dyes are the following: p-phenylazoaniline 2-naphthol (no. 26100), 4-0 tolylazo- (-toluidine-2-naphthol (26105), chililasohilidin-2-naphthol (26125), aniline-1-naphthalene-2, 3dEIDRO-2, 2-dimethylperimidine
    (26150).
    In addition, mixtures of various fat-soluble disazincles may be used.
    The concept of a surfactant encompasses both dispersants and wetting agents. For example, the following surfactants can be used. fatty alcohols, phosphates are simple polyglycolic esters of fatty alcohols sulfates of simple polyglycolic ethers irnyh alcohols, alkylaryl and polymerized arilalkilsulfonaty
    Auxiliary suspending agents to further reduce the viscosity in the dispersion are predominantly swelling mineral powders, such as bentonite or montmorillonite.
    Antifoaming agents are all known antifoaming agents, mainly silicone (siloxanes).
    Ethylene glycol, propylene glycol or glycerin is used as antifreeze, for example.
    As aromatic solvents, for example, alkyl benzenes, preferably xylene, and high-boiling technical aromatic distillates based on mineral oils with a boiling point are used. 156-312s (at normal pressures). Aromatic distillates can contain up to 35% by weight of saturated paraffin or alicyclic hydrocarbons.
    Aliphatic or cycloaliphatic ketones are used as ketones, especially liquid ones, whose ignition temperature (measured in a closed volume) is higher. Ketones are used to improve the solubility of linuron in aromatic solvents, the stability of emulsifying concentrates of linuron at low temperatures (from 0 to -10 ° C) Especially suitable ketones are isophorone and cyclohexanone, preferably isophorone.
    Preferred solvents are, for example, combinations of phthalon and xylene.
    Emulsifying concentrates obtain nytSM by dissolving the biologically active substance in organic solvents or mixtures of solvents, such as xylene and isophorone, and by adding emulsifiers, as well as under certain conditions of other auxiliary means for preparing the finished forms.
    Emulsifiers - this is all well known and employed as aids for the preparation of emulsifiable rastvorikole concentrates surfactant xylene calcium dodecylbenzenesulfonate or the calcium salts of chlorinated () alkanesulfonic acids, and polyglycol ethers, for example nonylphenol or triizobutilfenolovy, ethers or polyglycol ethers, for example, fatty alcohols or, for example, the reaction products of castor oil with ethylene oxide.
    Concentrates of linuron suspensions are obtained by mixing the biologically active substance, linuron, in an aqueous surfactant solution, in which the fat-soluble disaerator and the suspending agent are suspended, the total dispersion is first crushed in a toothed or corundum impact-disk mill to a fineness of about 200300 microns, then a ball millstone, then a ball millstone, about 30000 microns, and the case, which is cooled by water, is poured with 2 mm glass beads to a final fineness of approximately 5 microns.
    Linuron emulsifiable concentrates are prepared, for example, in the manner that linuron, emulsifiers and fat-soluble dis-. the azo dye is metered into the loaded solvent and dissolved with stirring.
    When using suspension concentrates or emulsifiable concentrates, depending on the concentration of the product, the required volumes are measured, mixed in water and sprayed in the form of diluted suspensions, emulsions or suspension emulsions.
    Emulsifiable concentrates stabilized against precipitation of crystals or aqueous concentrates of linuron suspensions are chemically, physically, as well as being technically stable (3 months at).
    At comparable consumption rates, the proposed stabilized linuron concentrates achieve a more effective herbicidal action than with wetting linuron powders, using comparable formulations suspended or emulsified in water, which allows in practice to save the biologically active
    substance.
    I
    The examples show the effect of inhibiting the crystallization of the constituent parts, as well as the biological effect of the concentrates of linuron. For biological experiments, a wettable linuron powder containing 50% by weight of biologically active substance is used as a comparative preparation.
    Example 1 (comparative), Aqueous concentrate suspension of linuron composition 40.0, sodium salt of ligninsulfonic acid 5.0, polymerized alkylaryl sulfonic acids in the form of Na-salt 1.0, montmorillonite powder Q, 2, siloconic antifoam 0.5 and water 53.3 are ground in a ball mill to such a fineness, that on 96 May the particles have sizes less than 5 microns. Measurements are made using a meter. To dilute the dispersion tested, a predominantly saturated aqueous solution of linuron is used.
    The suspension concentrate prepared in this way is well-flowable and easy to grind, however, during long-term storage, thickening and precipitate formation occur in the product (if a dispersion is stored for 2-3 months at 50 ° C),
    Using a polarization chamber, microscopic images of the suspension concentrate samples (each time 0.5 ml of the concentrate diluted with 99.5 ml of water) are compared and it is determined that, in contrast to the freshly prepared concentrate, the entire fraction of the fine crystals in the stored product disappeared and recrystallized rough linuron crystals in the form of regular wedges with a diameter of up to 70 μm characteristic for,
    Example 2 (comparative). Prepared according to example 1 (comparative) of the linuron dispersion of the composition, wt.%: Linuron 42.50, surfactant 3.00; auxiliary agent for preparing a suspension 0.25) 10% sodium hydroxide solution 0.70; silicone antifoam 0.20 and water 53.5
    The dispersion during 2-3-month storage at 50 s compacted to a paste that can be cut.
    The growth of linuron crystals with the formation of particles up to 65 microns and more is recorded, as opposed to a particle fineness of less than 5 microns in 95 May,% of the mass of particles of freshly ground concentrate,
    Example 3 (comparative), Emulsified 1L linuron concentrate is prepared of the following composition, wt.%: Linuron 20, O, isofsron 30, O; aromatic distillate 37.0 with t, bale, 198-31bs (containing 70 May aromatic hydrocarbons and 30 May saturated hydrocarbons), polyethylene glycol ether of castor oil (40 AeO) 4.0, calcium dodecylbenzosulfonic acid 6.0; triisobutylphenol polyglycol ether (30 AeO) 3, and; where AeC is the number of ethylene oxide eddies in the residue of polyglycolic ether,
    Examine the stability of the aqueous emulsion of this drug by mixing 2.5 ml of it in 97.5 ml of water. First, a turbid blue opalescent emulsion is formed, after several. minutes, its opalescence disappears with the release and sedimentation of linuron crystals. After 15 minutes, the emulsion has particles as small as 150 microns in 30 minutes to 250 microns. Example 1. Prepared according to example 1 (comparative suspension concentrate with an additional additive of 0.5% by weight of Color-Index 26150 disazocrasig), usually at equal levels in fishing vessels, a suspension concentrate stable during storage is obtained, which even after storage for more than 3 months After preserving the storage test, the product is easily dispensed, dispensed and has the following composition, wt%: linuron 40.0; sodium salt of ligninsulfonic acid 5, OJ polymerized alk hyalaric acid as the Na salt 1.0; montmorillonite powder 0.2; silicone defoamer 0.5, oxazo-dye 0.5 water 52.8. The amount of anti-crystallization additive is 1.25% by weight per linuron. Example 2. An equal amount of Color-Index 26100 disazo-dyes is used in the suspension concentrate according to the example. A dispersion is obtained which, after storage for 3 months at 50 ° C, maintains flowability and does not show a slight growth of crystals to particle size of maximum 12 microns. The fat soluble dye is 1.25% by weight based on linuron. Example 3. Add to the emulsifying concentrate of comparative example 3 (the content of the aromatic distillate is 36% by weight. In addition, 0.1% by weight of the disazo-dye Color-Index 26100 (which is 0.5% by weight per linuron), After 30 minutes, tests of the stability of the emulsion formed by the water of an emulsion recorded the precipitation of a part of linuron in the form of the finest crystals 10-30 microns in size in the form of a suspension emulsion, and after 2 hours the particle sizes do not exceed 30-40 microns (but not in cold water 10 C in which crystal growth is accelerated. Particle size distribution After the emulsion has been dispersed in suspo-emulsion, the emulsion is compared to the wetting powder particle size distribution. The sespo-emulsion :: does not show any sedimentation of the linuron, and with the help of the preparation, a complete biological effect is achieved, as with a freshly prepared emulsion. 4 (biological). Cultivated plants: wheat, oats and mustard are grown in experimental pots on clay soil and after germination they are sprayed with ready-made forms of linuron in the form of aqueous dilutions, respectively the amount of the spray solution is 300 l / ha at a pressure of 3 bar. The damaging effect is established after 4 weeks and expressed in percents based on the non-developed control (0). Comparative studies of linurs in the form of a 50% wettable powder, a 40% dispersion and a 20% emulsion concentrate show a tendency towards a slightly stronger effect. When using a dispersion and an emulsion concentrate as compared to a wettable powder when preparing a spray liquid, they can be dosed by volume and do not need to be weighed.
    40% dispersion (according to example 1)
    О 95 15 100 55 100
    mustard is given as a dicotyledonous sorn k.
    Table continuation
    权利要求:
    Claims (1)
    [1]
    METHOD OF CONTROL OF WEEDS, including their treatment with an aqueous solution of linuron in the form of an emulsifiable concentrate or in the form of an aqueous suspension concentrate in a dose of 0.060.25 kg of active substance per 1 ha, characterized in that, in order to increase the herbicidal effect, a fat-soluble disinfectant is added to the linuron concentrate in an amount of 0.5-1.25 wt.% calculated on linuron.
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    同族专利:
    公开号 | 公开日
    GR68194B|1981-11-10|
    FI801143A|1980-10-13|
    CS227307B2|1984-04-16|
    EP0017879A1|1980-10-29|
    EP0017879B1|1982-06-02|
    NO148507B|1983-07-18|
    HU184737B|1984-10-29|
    DE2914867A1|1980-10-16|
    AU5737780A|1980-10-16|
    DK157380A|1980-10-13|
    CA1142373A|1983-03-08|
    PT71085A|1980-05-01|
    DE3060493D1|1982-07-22|
    NZ193392A|1982-08-17|
    FI64880C|1984-02-10|
    NO801058L|1980-10-13|
    PL223385A1|1981-02-13|
    AU532338B2|1983-09-29|
    PL126544B1|1983-08-31|
    TR21000A|1983-05-01|
    US4441919A|1984-04-10|
    AT1127T|1982-06-15|
    NO148507C|1983-10-26|
    FI64880B|1983-10-31|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    CA680087A|1964-02-11|N. Park Jack|Herbicidal compositions and method of using same|
    US3083089A|1959-07-06|1963-03-26|Scott & Sons Co O M|Granular herbicidal composition and method|
    US3056642A|1959-12-22|1962-10-02|American Cyanamid Co|Granular form red oil soluble dye|
    US3060084A|1961-06-09|1962-10-23|Du Pont|Improved homogeneous, readily dispersed, pesticidal concentrate|
    NL283549A|1961-09-25|
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    US3385690A|1967-03-13|1968-05-28|Du Pont|Synergistic herbicidal mixtures|
    US3948636B1|1972-11-09|1985-09-10|
    US4163662A|1973-01-02|1979-08-07|E. I. Du Pont De Nemours And Company|Liquid formulations of 1--3-methoxy-3-methylurea and selected chloroacetamides|
    US4129435A|1976-07-26|1978-12-12|Sanyo Chemical Industries, Ltd.|Agricultural chemical/resin compositions|FR2498201B2|1980-06-11|1984-08-10|Roussel Uclaf|
    DE3573368D1|1984-04-27|1989-11-09|Ciba Geigy Ag|Herbicidal compositions|
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    AT151226T|1992-10-13|1997-04-15|Hoechst Schering Agrevo Gmbh|AQUEOUS DISPERSION CONCENTRATE, CONTAINING LINURON AS AN ACTIVE SUBSTANCE|
    DE4436293A1|1994-10-11|1996-04-18|Basf Ag|Stable mixture containing water and metazachlor|
    ZA200802442B|2005-09-01|2010-02-24|Du Pont|Liquid sulfonylurea herbicide formulations|
    CN102499251A|2011-10-20|2012-06-20|迈克斯化工有限公司|Preparation method of linuron water suspension agent|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE19792914867|DE2914867A1|1979-04-12|1979-04-12|HERBICIDAL AGENTS|
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