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 - 13 . (canceled)  
   
   
       14 . An aqueous phytopathological formulation comprising: 
 a hydrosoluble salt of at least one aminophosphate or aminophosphonate herbicide;    at least one principal surfactant selected from the group consisting of alkylbetaines and alkyl(amidoalkyl)betaines, and    at least one additive (ii) being an optionally polyalkoxylated acid or non acid phosphate mono- or di-ester.    
   
   
       15 . The formulation according to  claim 14 , wherein the herbicide is a hydrosoluble salt of N-phosphonomethyl glycine.  
   
   
       16 . The formulation according to  claim 14 , wherein the herbicide content is in the range 80 to 510 g/l expressed in acid herbicide equivalents.  
   
   
       17 . The formulation according to  claim 14 , wherein the principal surfactant corresponds to one or more of the following formulae:  
     
       
         
         
             
             
         
       
     
     wherein: 
 R 1  represents a linear or branched alkyl group containing 3 to 30 carbon atoms, or an alkamide group;  
 R 2 , which is identical pr different, represents an alkyl group,  
 R 3  represents a hydrogen atom or a —CH 2 COOM radical or an alkyl group;  
 M represents an alkali metal.  
 
   
   
       18 . The formulation according to  claim 14 , wherein the principal surfactant corresponds to one or more of the following formula  
       R 1 R 2 R 2 N + —CH 2 COO— 
     wherein: 
 R 1  represents a linear or branched alkyl group containing 3 to 20 carbon atoms  
 R 2  represents an alkyl group  
 
   
   
       19 . The formulation according to  claim 14 , wherein the amount of principal surfactant is in the range 20 to 180 g/l.  
   
   
       20 . The formulation according to  claim 14 , wherein the additive (ii) is a polyalkoxylated acid or non acid phosphate mono- or di-esters, polyalkoxylated with formula (II) below:  
       (AO) 3-m P(═O)(OM) m   
     wherein: 
 A, which is identical or different, represents a group R′ 1 —O(CH 2 —CHR′ 2 —O) n wherein: 
 R′ 1 , which is identical or different, represents a linear or non linear, saturated or unsaturated C 6 -C 20  hydrocarbon group;  
 R′ 2 , which is identical or different, represents a hydrogen atom or a methyl or ethyl group;  
 
 n is a mean number in the range 0 to 10;  
 M, which is identical or different, represents a hydrogen atom, an alkali or alkaline-earth metal, a N(R 3 ) 4   +  type radical in which radicals R 3 , which is identical or different, represents a hydrogen atom or a linear or non linear, saturated or unsaturated C 1 -C 6  hydrocarbon group optionally substituted with a hydroxyl group;  
 m is a whole number in the range 1 to 2.  
 
   
   
       21 . The formulation according to  claim 14 , wherein the additive (ii) is present in an amount of up to 120 g/l.  
   
   
       22 . The formulation according to  claim 14 , wherein the ratio by weight of principal surfactant/ additive (ii), is in the range 6/1 to ½.  
   
   
       23 . The formulation according to  claim 22 , wherein the total amount of principal surfactant and additive (ii) represents 60 to 180 g/l of the formulation.