FIELD: organic chemistry, pesticides, agriculture.
SUBSTANCE: invention relates to a method for preparing surface-active substance of the formula: (H-B)+A- wherein A- means formula:
wherein each R1 means independently (C2-C4)-alkylene with direct or branched chain; n means a number from 1 to 50 inclusively; (H-B)+ means cation of the formula:
wherein R2 is taken among group including hydrogen atom, (C1-C24)-alkyl and (C2-C24)-alkenyl-CH2; each R3 means independently (C2-C4)-alkylene with direct or branched chain; x means a number from 1 to 50, inclusively; y means a number from 0 to 50, inclusively. Method involves neutralizing at least one aromatic acid of the formula (2):
using at least one alkoxylated amine base of the formula (3):
wherein the prepared surface-active substance has pH value about from 3 to 9 in solution. Also, invention describes a composition based on surface-active substance, pesticide composition and method for protection of agricultural crops. Prepared surface-active substances are resistant to chemical and physical factors that can exhibit effect during in storage of the prepared product.
EFFECT: improved preparing method.
12 cl, 6 tbl, 4 ex
