Concentrated aqueous phytopathological formulation comprising a herbicide and a betaine type surfactant

Abstract

The present invention concerns an aqueous phytopathological formulation comprising a hydrosoluble salt of at least one aminophosphate or aminophosphonate type herbicide; at least one principal surfactant selected from alkylbetaines and alkyl(amidoalkyl)betaines, and at least one additive selected from at least one of the following compounds: (i) amines or etheramines comprising at least one hydrocarbon radical containing 2 to 24 carbon atoms, optionally polyalkoxylated; (ii) acid or non acid phosphate mono- or di-esters, optionally polyalkoxylated; and (iii) alkali metal, alkaline-earth metal, ammonium, alkylammonium, alkanolammonium, iron, zinc or manganese salts of a mineral acid.

1 . An aqueous phytopathological formulation comprising a hydrosoluble salt of at least one aminophosphate or aminophosphonate type herbicide; at least one principal surfactant selected from alkylbetaines and alkyl(amidoalkyl)betaines, and at least one additive selected from at least one of the following compounds:
 (i) amines or etheramines comprising at least one hydrocarbon radical containing 2 to 24 carbon atoms, optionally polyalkoxylated;   (ii) acid or non acid phosphate mono- or di-esters, optionally polyalkoxylated;   (iii) alkali metal, alkaline-earth metal, ammonium, alkylammonium, alkanolammonium, iron, zinc or manganese salts of a mineral acid.   
     
     
         2 . A formulation according to  claim 1 , wherein in that the herbicide is a hydrosoluble salt of N-phosphonomethyl glycine. 
     
     
         3 . A formulation according to  claim 1 , wherein the herbicide content is comprised between 80 and 510 g/l expressed in acid herbicide equivalents. 
     
     
         4 . A formulation according to  claim 1 , wherein the principal surfactant corresponds to one or more of the following formulae: 
       
         
           
           
               
               
           
         
         in which formulae: 
         R 1  represents a linear or branched alkyl group containing 3 to 30 carbon atoms, preferably 3 to 20 carbon atoms, such as propyl, dodecyl, hexadecyl or an alkamide group, such as dodecanamide; 
         R 2 , which may or may not be identical, represent an alkyl radical, preferably a methyl radical; 
         R 3  represents a hydrogen atom or a —CH 2 COOM radical or an alkyl radical; 
         M represents an alkali metal, preferably sodium. 
       
     
     
         5 . A formulation according to  claim 1 , wherein the amount of principal surfactant is comprised between 20 and 180 g/l. 
     
     
         6 . A formulation according to  claim 1 , wherein compound (i), used alone or as a mixture, is selected from amines comprising at least one linear or branched, saturated or unsaturated radical containing 2 to 24 carbon atoms, optionally comprising 8 to 18 oxyalkylene motifs, preferably oxyethylene, or a mixture of a plurality thereof; or from etheramines comprising at least one linear or branched, saturated or unsaturated radical containing 6 to 24 carbon atoms, optionally comprising 2 to 30 oxyalkylene motifs, preferably oxyethylene, or a mixture of a plurality thereof. 
     
     
         7 . A formulation according to  claim 1 , wherein the amount of compound (i), if present, is 0 to 120 g/l. 
     
     
         8 . A formulation according to  claim 1 , wherein compound (ii) is selected from acid or non acid phosphate mono- or di-esters, polyalkoxylated with formula (ii) below:
   (AO) 3-m P(═O)(OM) m      in which:   A, which may or may not be identical, represent a group R′ 1 —O(CH 2 —CHR′ 2 —O) n  in which:
 R′ 1 , which may or may not be identical, represent a linear or non linear, saturated or unsaturated C 8 -C 20  hydrocarbon radical, preferably C 8 -C 18 ; 
 R′ 2 , which may or may not be identical, represent a hydrogen atom or a methyl or ethyl radical; 
 n is a mean number of motifs in the range 0 to 10; 
   M, which may or may not be identical, represent a hydrogen atom, an alkali or alkaline-earth metal, a N(R 3 ) 4   +  type radical in which radicals R 3 , which may or may not be identical, represent a hydrogen atom or a linear or non linear, saturated or unsaturated C 1 -C 6  hydrocarbon radical optionally substituted with a hydroxyl group;   m is a whole number in the range 1 to 2.   
     
     
         9 . A formulation according to  claim 1 , wherein the amount of compound (ii), if present, is comprised between 0 and 120 g/l. 
     
     
         10 . A formulation according to  claim 1 , wherein compound (iii) is selected from alkali metal, alkaline-earth metal, ammonium or linear or non linear, saturated or unsaturated C 1 -C 6  alkylammonium or alkanolammonium sulphates, nitrates or phosphates; or from iron, zinc or manganese sulphates, used alone or as a mixture. 
     
     
         11 . A formulation according to any one of the preceding claims, wherein that the amount of compound (iii), if present, is comprised between 0 and 200 g/l. 
     
     
         12 . A formulation according to  claim 1 , wherein the proportion by weight of principal surfactant/sum of additives (i) to (iii) is comprised between 6/1 to 1/2. 
     
     
         13 . A formulation according to  claim 1 , wherein the total amount of principal surfactant and additive(s) represents 60 to 180 g/l of the formulation.