Surfactant Composition for Agricultural Chemicals

Abstract

A surfactant composition for agricultural chemicals, containing fatty acid polyoxyalkylene alkyl ether expressed by the following general formula (I), R 1 CO(EO) m (PO) n OR 2   (I) wherein the fatty acid polyoxyalkylene alkyl ether has a narrow ratio of 55% by mass or more, where the narrow ratio is expressed by the following formula (A): Narrow   ratio = ∑ i = n MAX - 2 i = n MAX + 2  Y i ( A )

1 . A surfactant composition for agricultural chemicals, comprising:
 fatty acid polyoxyalkylene alkyl ether expressed by the following general formula (I),
   R 1 CO(EO) m (PO) n OR 2   (I)
 
   where R 1 CO is a C14-22 saturated or unsaturated fatty acid residue; R 2  is a C1-3 alkyl group; m and n each express an average number of moles added, where m is an integer of 2 to 10, and n is an integer of 1 to 4; and EO expresses a structural unit of ethylene oxide, and PO expresses a structural unit of propylene oxide, where a form of additions of EO and PO is a block polymer,   wherein the fatty acid polyoxyalkylene alkyl ether has a narrow ratio of 55% by mass or more, where the narrow ratio is expressed by the following formula (A):   
       
         
           
             
               
                 
                   
                     
                       Narrow 
                        
                       
                           
                       
                        
                       ratio 
                     
                     = 
                     
                       
                         ∑ 
                         
                           i 
                           = 
                           
                             n 
                             
                               MAX 
                               - 
                               2 
                             
                           
                         
                         
                           i 
                           = 
                           
                             n 
                             
                               MAX 
                               + 
                               2 
                             
                           
                         
                       
                        
                       
                         Y 
                         i 
                       
                     
                   
                 
                 
                   
                     ( 
                     A 
                     ) 
                   
                 
               
             
           
         
         where i is the number of moles of alkylene oxide added (the total number of moles of EO and PO which are added), n MAX  is the value of i of the fatty acid polyoxyalkylene alkyl ether whose number of moles of alkylene oxide added presents in the largest amount on mass basis among all the fatty acid polyoxyalkylene alkyl ether expressed by the general formula (I), and Yi is a proportion (% by mass) of the fatty acid polyoxyalkylene alkyl ether whose number of moles of alkylene oxide added is i in the entire fatty acid polyoxyalkylene alkyl ether. 
       
     
     
         2 . A surfactant composition for agricultural chemicals, comprising:
 the fatty acid polyoxyalkylene alkyl ether as defined in  claim 1 ;   water; and   C1-4 lower alcohol,   wherein a composition ratio of the surfactant composition expressed by the fatty acid polyoxyalkylene alkyl ether/the water/the C1-4 lower alcohol is 10% by mass to 60% by mass/10% by mass to 70% by mass/10% by mass to 70% by mass.