Plant protecting and regulating compositions – Plant growth regulating compositions – Plural active ingredients
Reexamination Certificate
1999-03-25
2001-04-17
Dees, Jose′ G. (Department: 1616)
Plant protecting and regulating compositions
Plant growth regulating compositions
Plural active ingredients
C504S222000
Reexamination Certificate
active
06218337
ABSTRACT:
The present invention relates to a solid mixture comprising
A) 3-isopropyl-2,1,3-benzothiadiazin-4-one 2,2-dioxide or a salt thereof and
B) at least one nonionic surfactant.
The present invention furthermore relates to a process for the preparation of this solid mixture, the use of the solid mixture is and method of controlling undesirable vegetation.
Liquid formulations are established in the field of agriculture, and surfactants are added under practical conditions when controlling harmful plants for increasing the herbicidal activity of the active ingredient and for guaranteed weed control.
The disadvantage of liquid formulations is that large amounts of packaging material, such as canisters made of metal and man-made materials, are accumulated and have to be disposed of in a safe manner. Furthermore, the safe storage of products in liquid form is complicated. Low storage temperatures may also result in undesirable crystallization.
Benzothiadiazin-4-one 2,2-dioxides and salts thereof are disclosed in the literature as herbicidally active crop protection substances (DE-A 15 42 836, DE-A 21 64 459, DE-A 22 17 722).
The earlier German Patent Application with the file number 196 13 395.5 describes granules of hygroscopic water-soluble products, for example the sodium salt of 3-isopropyl-2,1,3-benzothiadiazin-4-one 2,2-dioxide. These granules are preferably used without auxiliaries and additives.
DE-A 43 15 878 describes the solid, non-hygroscopic magnesium salt of 3-isopropyl-2,1,3-benzothiadiazin-4-one 2,2-dioxide. This publication also teaches a solid mixture of this salt and of sodium lignosulfonate which is solid per se and acts as dispersant.
It is an object of the present invention to provide further solid mixtures which are based on 3-isopropyl-2,1,3-benzothiadiazin-4-one 2,2-dioxide or a salt thereof and which additionally have a good biological activity.
We have found that this object is achieved by a solid mixture comprising
A) 3-isopropyl-2,1,3-benzothiadiazin-4-one 2,2-dioxide or a salt thereof and
B) at least one nonionic surfactant.
We have furthermore found a process for the preparation of this solid mixture, and also the use of the solid mixture and a method of controlling undesirable vegetation.
Suitable salts of 3-isopropyl-2,1,3-benzothiadiazin-4-one 2,2-dioxide are the alkali metal salts, especially the sodium and the potassium salt, the alkaline earth metal salt, especially the calcium, the magnesium and the barium salt, the transition metal salts, especially the manganese, the copper, the zinc and the iron salt, the ammonium salts, in which up to 4 hydrogen atoms can be replaced by C
1
-C
4
-alkyl or hydroxy-C
1
-C
4
-alkyl and/or a phenyl or benzyl, especially the ammonium, the diisopropyl-ammonium and the tetramethylammonium salt.
Particularly preferred are the sodium, the magnesium and the ammonium salt.
The preparation of 3-isopropyl-2,1,3-benzothiadiazin-4-one 2,2-dioxide and the salts thereof is generally known (cf. DE-A 15 42 836, DE-A 43 15 878 and DE-A 195 05 036).
The nonionic surfactants are alcohol alkoxylates, alkylated EO/PO block polymers, alkylphenol ethoxylates, polyols, EO/PO block polymers, organosilicone [sic] compounds, alkyl glycosides, alkyl polyglycosides, fatty amine alkoxylates, dialkyl adipates and dialkyl phthalates.
Especially preferred amongst the nonionic surfactants are alcohol alkoxylates, alkylated EO/PO block copolymers, EO/PO block polymers, organosilicon compounds, alkyl glycosides, alkyl polyglycosides, fatty amine alkoxylates, dialkyl adipates and dialkyl phthalates.
Particularly preferred are alcohol alkoxylates, alkylated EO/PO block polymers, EO/PO block copolymers, alkyl glycosides, alkyl polyglycosides, fatty amine alkoxylates, dialkyl adipates and dialkyl phthalates.
Especially preferred amongst the nonionic surfactants are also alkyl glycosides and alkyl polyglycosides, mainly alkyl polyglycosides. Suitable substances which are preferred are alkyl polyglycosides with a mean degree of polymerization of 1.0 to 1.7. Additionally preferred are alkyl polyglycosides with a C
6
-C
18
-alkyl chain.
Examples of alcohol alkoxylates are, inter alia, Lutensol® ON, Lutensol®TO, Lutensol® AO, Lutensol®AT (BASF); Genapol® brands (Hoechst AG) and Synperionic® brands (ICI); Lutensol® ON 30 is preferably used.
Examples of alkylated EO/PO block polymers are, inter alia, Antarox® BO (Rhône-Poulenc); Emulsogen® V 2436 (Hoechst AG), Plurafac LF 700 (BASF AG); Dehypon® LS, Dehypon® LT (Henkel); and Synperionic® LF brands (ICI).
Examples of EO/PO block polymers are, inter alia, Pluronic® PE brands (BASF); Genapol® PF brands (Hoechst AG) and Synperionic® PE brands (ICI).
Examples of organosilicon compounds are, inter alia, Silwet® L-77 (Witco) and Tegopren® brands (Goldschmidt).
Examples of alkyl glycosides and alkyl polyglycosides are, inter alia, AG 6202 (Akzo Nobel); Lutensol® GD 70 (BASF AG); Atplus® 258, Atplus® 264, Atplus® 430, Atplus® 460, Atplus® 469, Atplus® 450 (ICI Surfactants); Agrimul® PG 2067, Agrimul® PG 2069″, Agrimul® PG 600″, Agrimul PG 215″ (Henkel).
Examples of fatty amine alkoxylates are, inter alia, Ethomeen® brands, Armoblem® brands (Akzo-Nobel) and Genamin® brands (Hoechst).
Examples of dialkyl adipates are dioctyl adipate and diisotri-decyl adipate.
An example of dialkyl phthalate which may be mentioned is diisotridecyl phthalate.
The brands (trade names) given in the abovementioned examples do not represent any restriction; they are merely representatives of the particular class of substances. Other brands (trade names) are given in the following publications:
McCutheon's; Emulsifiers and Detergents, Volume 1: Emulsifiers and Detergents 1994, North American Edition, McCutheon Division, Glen Rock N.J., USA;
McCutheon's; Emulsifiers and Detergents, Volume 2: Emulsifiers and Detergents 1994, International Edition, McCutheon Division, Glen Rock N.J., USA;
Surfactants in Europe, A Directory of surface active agents available in Europe, 2nd Ed. 1989, Terg Data, Darlington, England; Ash, Michael, Handbook of cosmetic and personal care additives, 1994, Gower Publishing Ltd, Aldershot, England;
Ash, Michael, Handbook of industrial Surfactants, 1993, Gower Publishing Ltd, Aldershot, England.
The mixture according to the invention may furthermore comprise at least one water-soluble inorganic salt from amongst the group consisting of ammonium salts, alkali metal salts and alkaline earth metal salts.
Suitable inorganic water-soluble ammonium salts are ammonium compounds, or else urea and thiourea.
Examples of water-soluble inorganic alkali metal salts which can be employed are sodium and potassium salts.
Suitable water-soluble inorganic alkaline earth metal salts are calcium and magnesium salts, especially preferably magnesium salts.
Particularly preferred as water-soluble inorganic ammonium salts are, inter alia, ammonium sulfate, ammonium hydrogen sulfate, ammonium chloride, ammonium acetate, ammonium formate, ammonium oxalate, ammonium carbonate, ammonium hydrogen carbonate, ammonium nitrate, ammonium thiosulfate, ammonium phosphate, ammonium hydrogen diphosphate, ammonium hydrogen monophosphate, ammonium hydrogen phosphate and ammonium thiocyanate. Ammonium sulfate is very especially preferably used.
The mixture according to the invention may furthermore comprise at least one other customary formulation auxiliary. Suitable customary formulation auxiliaries are, inter alia, dispersants, wetting agents, binders, antifoam agents, chelating agents and lubricants.
The dispersants and wetting agents which are suitable are anionic, cationic, amphoteric or nonionic. Preferred are anionic wetting agents, such as condensates of aromatic sulfonic acids and formaldehyde, lignosulfonates and their sodium, potassium and ammonium salts, alkylsulfonates and polyoxyethylene fatty acid esters, polyoxyethylene fatty alcohol ethers, EO/PO block polymers and the like.
Suitable binders (adhesives) are, in particular, polyvinyl-pyrrolidone, polyvinyl alcohol, polyvinyl acetate, vinylpyrrolidone/vinyl a
Berghaus Rainer
Bratz Matthias
Jager Karl-Friedrich
Parg Adolf
BASF - Aktiengesellschaft
Dees Jose′ G.
Keil & Weinkauf
Pryor Alton
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